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Contact Name
Joko Waluyo
Contact Email
jokowaluyo@staff.uns.ac.id
Phone
+62271-632112
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equilibrium@ft.uns.ac.id
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Jl. Sutami 36A, Kentingan, Surakarta
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Kota surakarta,
Jawa tengah
INDONESIA
Equilibrium Journal of Chemical Engineering
Equilibrium Journal of Chemical Engineering (EJChE) publishes communication articles, original research articles and review articles in :. Material Development Biochemical Process Exploration and Optimization Chemical Education Chemical Reaction Kinetics and Catalysis Designing, Modeling, and Process Optimization Energy and Conversion Technology Thermodynamics Process System Engineering and products Membrane Technology Food Technology Bioprocess Technology Chemurgy Technology Waste Treatment Technology Separation and Purification Technology Natural Dyes Technology
Articles 41 Documents
Pembuatan Katoda Baterai Lithium Ion Iron Phospate (LiFePO4) dengan Metode Solid State Reaction Permatasari, Elizabeth Putri; Rindi, Mega Permata; Purwanto, Agus
Equilibrium Journal of Chemical Engineering Vol 1, No 1 (2017): Volume 1 No 1 January 2017
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v1i1.40373

Abstract

One of the most finest materials for lithium ion battery nowadays is lithium iron phosphate or LiFePO4. Lithium iron phosphate was synthesized with solid state reaction method  by  optimizing  the  variable  of  material  and  temperature.  The  variable  for calcination temperatures were 700oC, 800oC, and 900oC while the basic materials as Fe sources were Fe2O3 and FeSO4. Particles morphologies and quantity of crystal were investigated in details by X-ray diffraction analysis XRD. XRD imaging showed diffraction of nanoparticles LiFePO4 with crystal quantity 40,4% (800oC) and 59,1% (900oC) of materials Fe2O3,which the most quantity from other samples. Thus, chatode materials were made from LiFePO4 that synthesized at calcination temperatures 800oC and 900oC. In conclusion the material chatode from LiFePO4 that had been synthesized had so many impurities because it was hard to get single phase of nanoparticles LiFePO4 and need more improvement in optimizing the process condition for ideal chatode material.
Edukasi Teknologi Produksi dan Aplikasi Baterai Lithium Ion pada Kendaraan Listrik di SMK Muhammadiyah 6 Karanganyar Dyartanti, Endah Retno; Paramitha, Tika; Widiyandari, Hendri; Jumari, Arif; Nur, Adrian; Budiman, Anatta Wahyu; Purwanto, Agus
Equilibrium Journal of Chemical Engineering Vol 4, No 2 (2020): Volume 4 No 2 December 2020
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v4i2.45154

Abstract

Abstrak. Kendaraan listrik merupakan kendaraan yang digerakkan dengan motor listrik dan mendapat sumber daya listrik yang tersimpan dalam baterai. Keuntungan penggunaan kendaraan listrik dibandingkan dengan kendaraan konvesional antara lain, efisiensi konversi energi yang tinggi, mengurangi pemakaian bahan bakar minyak sehingga secara langsung dan mengurangi emisi gas buang ke atmosfir. Riset grup matertial maju dan energy storage fokus mengembangkan penelitian tentang produksi baterai dan aplikasinya. Kegiatan pengabdian ini bertujuan untuk mensosialisasikan hasil riset tentang baterai dan aplikasi kendaraan listrik sebagai salah satu cara transfer pengetahuan teknologi untuk pelajar Sekolah Menengah Kejuruan (SMK). Siswa SMK harus dibekali dengan pemahaman mengenai baterai lithium ion dan kendaraan listrik sehingga bisa meningkatkan kompetensi lulusan dan memiliki daya saing di pasar kerja. SMK Muhammadiyah 6 Karanganyar memiliki jurusan Teknik Audio Video, Teknik Komputer Jaringan, Teknik Mesin, Teknik Elektro dan Mekanik Otomotif sehingga kegiatan dan kerjasama ini akan sangat mendukung kegiatan pembelajarn. Kegiatan pengabdian ini merupakan tindak lanjut kerja sama magang siswa yang dilakukan di unit produksi baterai dibawah Pusat Unggulan Iptek (PUI) PT Teknologi Penyimpanan Energi Listrik (University Center of Excellence for Electrical Energy Storage Technology). Dengan terselenggaranya kegiatan pengabdian diharapkan mampu memberikan pengetahuan mengenai hasil riset kampus kepada siswa, sehingga dapat memberikan pemahaman mengenai konsep dasar kendaraan listrik dan menumbuhkan inovasi pada siswa untuk mengembangkan kendaraan listrik. Abstract. Electric vehicles are vehicles that are driven by electric motors from the battery as energy sources. The advantages of electric vehicles related to their high energy conversion include reducing fuel oil consumption and reducing exhaust emissions. The advanced materials and energy storage research group is currently developing researches on battery production and its applications. This educational activity is a part of the Research Group Service Grant (HGR-UNS) which aims to disseminate the results of research on batteries and their application to electric vehicles as a form of advanced technology transfer for Vocational High School (SMK) students. SMK students must be provided with knowledge about lithium-ion batteries (LIB) and electric vehicles so that they can improve their competence and increase their competitiveness in the job market. SMK Muhammadiyah 6 Karanganyar offers several programs so that this educational activity will greatly support students' learning activities. This education activity is also the continuation of interns' activities at the Center for Excellence in Higher Education Science and Technology for Electrical Energy Storage Technology. With this educational activity's implementation, we wish to increase students' knowledge about battery technology and its applications. Keywords: education; Lithium-Ion Battery; Electric Vehicle
EFEKTIVITAS EKSTRAK DAUN SIRIH SEBAGAI BAHAN AKTIF ANTIBAKTERI DALAM GEL HAND SANITIZER NON-ALKOHOL Fathoni, Dhika Satriawan; Fadhillah, Ilham; Kaavessina, Mujtahid
Equilibrium Journal of Chemical Engineering Vol 3, No 1 (2019): Volume 3 No 1 July 2019
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v3i1.43215

Abstract

Abstrak. Penelitian ini bertujuan untuk mempelajari efektivitas ekstrak daun sirih sebagai pengganti bahan aktif antibakteri pada hand sanitizer. Ekstrak daun sirih diperoleh dengan cara maserasi daun sirih selama 3x24 jam dalam larutan alkohol 70%. Kadar alkohol pada ekstrak daun sirih hasil maserasi diuapkan dalam vacuum evaporator (T = 60oC) hingga volume ekstrak yang tersisa sekitar 15%. Ekstrak ini digunakan sebagai bahan antibakteri aktif dalam pembuatan gel pembersih tangan. Bahan kimia dasar pembuatan gel seperti karbomer (zat pembentuk gel), propilen glikol (penstabil), gliserin, nipagin dan trietanolamina / TEA (zat alkali) dicampur dan diaduk dalam air suling (sekitar 85 ml) dengan komposisi 0,3 g, 4 ml, 3 ml, 0,02 g dan 0,2 ml, masing-masing. Volume ekstrak yang ditambahkan ke dalam gel divariasikan 8, 10, dan 12 ml. Terakhir, volume hand sanitizer ditambahkan aquades untuk mengatur volumenya 100 ml. Efektivitas dan kualitas hand sanitizer ini dianalisis senyawa aktifnya, keasaman gel (pH), organoleptik, daya hambat pertumbuhan bakteri, dan dispersi gel. Staphylococcus aureus dipilih sebagai bakteri yang diuji karena ditemukan di tangan. Kehadiran saponin, tanin, dan flavonoid terdeteksi secara kualitatif di dalam produk. Hasil penelitian menunjukkan bahwa penambahan ekstrak daun sirih 12 ml (sampel III) memiliki kinerja terbaik pada kisaran konsentrasi ekstrak yang diteliti (8-12 ml). Sampel III memiliki keasaman (pH) dan zona hambat masing-masing sekitar 5 dan 9,78 mm2. Area hambat ini lebih tinggi dibandingkan dengan hand sanitizer komersial yang memiliki luas 2,98 mm2. Namun, daya sebar hand sanitizer ini sedikit lebih rendah dibandingkan hand sanitizer komersial (sekitar 167% dan 180%). Uji organoleptik menggambarkan bahwa produk ini dapat diterima di masyarakat karena tidak mengiritasi dalam pemakaian. Produk ini lebih aman sebagai hand sanitizer dibandingkan produk sejenis yang menggunakan alkohol sebagai bahan aktifnya. Abstract. This research aims to study the effectiveness of betel leaf extract as a substitute for antibacterial active ingredients in hand sanitizer. Betel leaf extract is obtained by maceration of betel leaves for 3x24 hours in 70% alcohol solution. The alcohol content in the betel leaf extract from maceration was evaporated in the vacuum evaporator (T = 60oC) until the remaining extract volume was around 15%. This extract is used as an active antibacterial ingredient in making hand sanitizer gel. The basic chemicals of making gels such as carbomer (gelling agent), propylene glycol (stabilizer), glycerin, nipagin and triethanolamine / TEA (alkalizing agent) are mixed and stirred in distilled water (about 85 ml) with compositions of 0.3 g, 4 ml, 3 ml, 0.02 g and 0,2 ml, respectively. The volume of extract added in the gel was varied 8, 10, and 12 ml. Finally, the volume of hand sanitizer was added distilled water to adjust its volume 100 ml. The effectiveness and quality of this hand sanitizer were analyzed its active compounds, gel acidity (pH), organoleptic, the inhibitory ability of bacterial growth, and gel dispersion. Staphylococcus aureus was chosen as the bacteria tested because it found in the hands.  The presence of saponin, tannins, and flavonoids is detected qualitatively in the product. The results showed that adding 12 ml extract of betel leaf (sample III) has the best performance in the studied range of extract concentration (8-12 ml).  Sample III has the acidity (pH) and the inhibitory zone about 5 and 9.78 mm2, respectively. This inhibitory area is higher than that of the commercial hand sanitizer, which has an area of 2.98 mm2. However, the spreadability of this hand sanitizer is slightly lower than that of the commercial one (about 167% and 180%). Organoleptic tests depict that this product is acceptable in the community because it does not irritate in use. This product is safer as hand sanitizer than the similar products that use alcohol as an active ingredient.Keywords : betel leaf, antibacterial, hand sanitizer, Staphylococcus aureus
Penentuan Pelarut untuk Adsorpsi Oryzanol dari Minyak Bekatul dengan Investigasi Kromatografi Lapis Tipis (Thin Layer Chromatography) Susanti, Ari Diana; Sediawan, Wahyudi Budi; Wirawan, Sang Kompiang; Budhijanto, Budhijanto
Equilibrium Journal of Chemical Engineering Vol 1, No 2 (2017): Volume 1 No 2 July 2017
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v1i2.40424

Abstract

Oryzanol yang terkandung dalam minyak bekatul mempunyai kekuatan antioksidan lebih  tinggi  daripada vitamin E  dan  terbukti  mempunyai efek hipokolesteromik sehingga berguna untuk kesehatan jantung dan pembuluh darah. Metode adsorpsi menggunakan adsorben silika merupakan salah satu metode isolasi oryzanol yang menjanjikan. Keberhasilan proses pemungutan oryzanol sangat ditentukan oleh pemilihan pelarut yang digunakan karena oryzanol merupakan senyawa ester sehingga sifatnya mirip dengan sifat trigliserida minyak bekatul yang ingin dipisahkan darinya. Oleh karena itu perlu ditentukan pemodifikasi pelarut sehingga diperoleh campuran pelarut yang cocok untuk proses tersebut. Modifikasi dilakukan terhadap pelarut utama n-heksana dan pemodifikasi potensial yang digunakan adalah etil asetat, diklorometana, kloroform, dan aseton. Performa campuran pelarut diuji menggunakan metode kromatografi lapis tipis (thin layer chromatography - TLC) menggunakan plat TLC silika gel grade 60. Hasil penelitian menunjukkan  kombinasi  n-heksana/aseton  =  85/15  memberikan  hasil  pemisahan oryzanol terbaik, sedangkan kombinasi    n-heksana/etil asetat = 90/10 patut dipertimbangkan apabila elusi secara gradien dipilih dalam proses pemisahan.
KOMPOSIT ZnO-CuO HASIL SINTESIS DENGAN METODE ELEKTROKIMIA SEBAGAI KATALIS FOTODEGRADASI METHYL ORANGE Nur, Adrian; Kusumaningrum, Anis Yuliana; Prananda, Danang Bayu; Kinasih, Tutut Ayu
Equilibrium Journal of Chemical Engineering Vol 3, No 2 (2019): Volume 3 No 2 December 2019
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v3i2.42624

Abstract

Abstrak. Semikonduktor oksida logam adalah salah satu jenis nanokomposit yang digunakan untuk rangkaian mikroelektronik, perangkat piezoelektrik, sel bahan bakar, sensor, katalis, pelapis permukaan untuk mencegah korosi, dan sel surya. ZnOCuO adalah jenis komposit semikonduktor oksida logam. Kombinasi kedua logam tersebut dapat menghasilkan komposit yang dapat digunakan sebagai katalisator dan zat antibakteri. Metode fotodegradasi adalah pengolahan zat warna tekstil yang memecah zat warna organik menjadi senyawa yang lebih sederhana. Tujuan dari penelitian ini adalah untuk mengetahui keefektifan komposit ZnO-CuO yang digunakan sebagai katalisator dalam proses fotodegradasi jingga metil. Metode yang digunakan dalam sintesis komposit ZnO-CuO adalah metode elektrokimia dengan menggunakan larutan elektrolit asam asetat. Pada penelitian ini digunakan asam asetat dengan konsentrasi 0,15 dan 0,3 M. Komposit yang dihasilkan dianalisis menggunakan analisis XRF, XRD dan FTIR. Komposit digunakan sebagai katalis fotodegradasi jingga metil dengan variasi waktu yang berbeda 0 sampai 150 menit. Absorbansi larutan degradasi diukur dengan Spektrofotometer UV VIS. Efektivitas yang dihasilkan dari komposit dengan konsentrasi asam asetat 0,3 M sebesar 21,69%, sedangkan efektivitas yang dihasilkan dari komposit dengan konsentrasi 0,15 M sebesar 16,58%. Katalis yang dihasilkan pada konsentrasi asam asetat 0,3 M lebih efektif daripada katalis yang diproduksi pada konsentrasi asam asetat 0,15 M. Abstract. Metal oxide semiconductors are one type of nanocomposites used for microelectronic circuits, piezoelectric devices, fuel cells, sensors, catalysts, surface coatings to prevent corrosion, and solar cells. ZnOCuO is a type of metal oxide semiconductor composite. The combination of these two metals can produce a composite that can be used for catalysts and antibacterial substances. Photodegradation method is a textile dyestuff treatment which breaks down organic dyes into simpler compounds. The purpose of this paper is to determine the effectiveness of ZnO-CuO composites used as catalysts in the methyl orange photodegradation process. The method used in the synthesis of ZnO-CuO composites is an electrochemical method using an acetic acid electrolyte solution. In this study, acetic acid was used with the concentration of 0.15 and 0.3 M. The resulting composites were analyzed using XRF, XRD and FTIR analysis. The composites are used as methyl orange photodegradation catalysts with different time variations 0 to 150 minutes. The absorbance of the degradation solution was measured by UV VIS Spectrophotometer. The effectiveness produced from the composites with concentrations of 0.3 M acetic acid was 21.69%, while the effectiveness produced from the composites with concentrations of 0.15 M was 16.58%. Catalysts produced at concentrations of 0.3 M acetic acid are more effective than catalysts produced at concentrations of 0.15 M acetic acid. Keywords: electrosynthesis, ZnO-CuO composite, photodegradation, methyl orange, textile dyes
Stripping Bioethanol from Fermented Molasses in A Packed Tower Sekararum, Andina Indah; Putri, Andhika Sulistyani; Margono, Margono
Equilibrium Journal of Chemical Engineering Vol 2, No 1 (2018): Volume 2 No 1 January 2018
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v2i1.40431

Abstract

The high price of bioethanol is the barrier of its implementation as renewable energy sources. Therefore, efforts to reduce its price is an important factor to drive the implementation. Stripping is a way to separate bioethanol from the broth which will be cheaper than distillation process. This research was aimed to separate bioethanol from its fermented molasses. The effect of feed flow rate, air flow rate and feed temperature were investigated. A column with inside diameter of 0.1 m was used and packed with 0.02 x 0.016 m PVC rashig ring at 1 m of bed. The broth was fed from the top side and the air stripper was flown down from the bottom side. Six millimeters of the top product was collected at steady state condition for analysis of bioethanol concentration. The best experiment was the one which had feed flow rate 1,5 L/min and stripping air flow rate of 5,85 L/min. It resulted bioethanol content of 19.39% or equivalent to 38.5% stripped out of the broth.
Pembuatan dan Uji Organoleptik Hand Sanitizer dari Daun Mangga (Mangifera indica) dengan Metode Maserasi Setyawardhani, Dwi Ardiana; Saputri, Cindy Mei; Ni'mah, Nafi'atun
Equilibrium Journal of Chemical Engineering Vol 4, No 1 (2020): Volume 4 No 1 July 2020
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v4i1.42852

Abstract

Abstrak. Ekstrak daun mangga memiliki kandungan alkaloid, polifenol, saponin, tanin, flavonoid yang berfungsi sebagai senyawa antimikrobia yang dapat menghambat pertumbuhan bakteri. Tujuan dari penelitian ini untuk membuat hand sanitizer dari daun mangga, menganalisa sifat organoleptik produk dan mengidentifikasi kandungan fitokimia. Simplisia daun mangga dimaserasi menggunakan pelarut pada suhu ruangan selama 3x24 jam dengan pergantian pelarut setiap harinya kemudian disaring hingga diperoleh filtrat. Filtrat kemudian diuapkan dengan vacuum evaporator pada suhu 65°C sampai volumenya berkurang 80% dari volume awal. Ekstrak yang dihasilkan kemudian diolah menjadi hand sanitizer dalam bentuk gel. Ekstrak daun mangga kemudian dilakukan uji fitokimia yang hasilnya menunjukkan adanya kandungan fitokimia di dalam daun mangga seperti flavonoid, alkaloid, polifenol, tanin, dan juga saponin yang berpotensi sebagai antibakteri alami dalam pembuatan hand sanitizer. Hasil analisa organoleptik sediaan gel hand sanitizer menunjukkan warna hijau kekuningan, aroma khas daun manga, tektur gel lembut, sifat penggunaan dingin, tidak lengket dan tidak kering, dan cepat menyerap saat diaplikasikan pada tangan. Abstract. Mango leaf extracts contain alkaloids, polyphenols, saponins, tannins, flavonoids that function as antimicrobial compounds to inhibit bacterial growth. This study aims to make a hand sanitizer from mango leaves extract, analyze the organoleptic properties of the product, and identify the phytochemical content. Dried mango leaves were macerated using solvents at room temperature for 3x24 hours with a change of solvent every day, then filtered until the filtrate was obtained. The filtrate is then evaporated with a vacuum evaporator at 65 ° C until the volume is reduced 80% from the initial volume. The resulting extract is then processed into a hand sanitizer in gel form. Mango leaf extracts are then subjected to phytochemical tests. The results indicated that phytochemical content in mango leaves were flavonoids, alkaloids, polyphenols, tannins, and also saponins that have the potential as a natural antibacterial in making hand sanitizers. Organoleptic analysis results of hand sanitizer gel preparations showed yellowish-green color, mango leaves odor, soft, non-sticky and moist gel texture, cold use properties and quickly absorbed when applied to the hands. Keywords: Hand sanitizer, maceration, mango leaf extracts
Synthesis of TiO2 by Hydrolysis/Electrochemical to Reduce Hazardous Disinfecting Materials Nur, Adrian; Jumari, Arif; Nazriati, Nazriati; Fajaroh, Fauziatul
Equilibrium Journal of Chemical Engineering Vol 1, No 1 (2017): Volume 1 No 1 January 2017
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v1i1.40365

Abstract

The TiO2 photo-catalysis can be used for the purpose of disinfectant purpose. In  this  work,  the  TiO2   prepared  by  hydrolysis-electrochemical method  was  used  to produce  disinfectant  to  replace  and  reduse  conventional  material  disinfectant.  The synthesis of TiO2  was occured at constant voltage of 10 V for 2.5 hours under constant stirring  and  room  temperature.  The  product  of  synthesis  was  analysed  by  scanning electron microscopy, energy dispersive X-ray spectrometry, and X-ray diffractometer. The performance of desinfectant was done with inactivation of bacteria E coli in solid media. The phase of TiO2 particle producted shows anatase and rutile phase. The TiO2 resulted from hydrolysis/electrohemical method can be used to reduce HCl for desinfectant. The results of testing disinfectant for inactivation of bacteria E coli in solid media show that disinfectant  from  HCl/TiO2   is  the  most  efective  to  inactivation  of  bateria  E.  coli. Treatment with ultraviolet rays resulted less number of bacteria than sunlight.
Menurunkan Indeks Glikemik Beras Putih Melalui Proses Pratanak Margono, Margono; Hanifah, Fawnia; Safitri, Ameilia Ayu; Sambodo, Bregas Siswahjono Tatag; Paryanto, Paryanto; Waluyo, Joko; Susanti, Ari Diana; Setyono, Prabang
Equilibrium Journal of Chemical Engineering Vol 4, No 2 (2020): Volume 4 No 2 December 2020
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v4i2.45464

Abstract

Abstrak. Nasi merupakan sumber karbohidrat dan makanan pokok masyarakat di seluruh dunia, khususnya di Asia. Konsumsi karbohidrat khususnya beras dapat menimbulkan efek penyakit diabetes tipe 2. Hal ini disebabkan karena indeks glikemik nasi putih lebih tinggi yaitu 56. Penelitian ini dilakukan untuk mempelajari pengaruh nasi ciherang setengah matang dan ekstrak daun keji beling. Beras direndam selama 6 jam sehingga kadar air meningkat menjadi 30%. Beras dimasak dalam autoclave pada suhu 116 oC selama 15 menit. Nasi kemudian dikeringkan pada suhu 50 oC selama 24 jam. Metode ini tidak berpengaruh pada penurunan indeks glikemik tetapi meningkatkan indeks glikemik lebih tinggi dari 54, mis. 56 oleh penguji 1 dan 80 oleh penguji 2. Abstract. Rice is a carbohydrate source and staple food for around the world of people, specially in Asia. Carbohydrate consumption , especially rice, can have effects of diabetes desease type 2. It is caused by the glycemic index of white rice is higher of 56. This research was conducted to study the effects of parboiled ciherang rice and extract of keji beling leaf. The rice was submerged for 6 hours so the mouisture increased to 30%. It was cooked in an autoclave at 116 oC for 15 minutes. The cooked rice then it was dried at 50 oC for 24 hours. This method didn’t have effects on reducing glycemic index but it increased the glycemic index higher than 54, e.g. 56 by tester 1 and 80 by tester 2.Keywords: rice, glycemic index, parboiled, ciherang.
Phase Control of TiO2 Prepared by TiCl4 Hydrolysis and Electrochemical Method Nur, Adrian; Jumari, Arif; Fajaroh, Fauziatul; Nazriati, Nazriati
Equilibrium Journal of Chemical Engineering Vol 1, No 2 (2017): Volume 1 No 2 July 2017
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v1i2.40423

Abstract

The phase structure of  TiO2   dependent on  applications. It  is  importat to develop an effective method to control the phase structure of TiO2. In this study, the TiO2 was synthesized by TiCl4 hydrolysis method. The control of hydrolysis was done by electrochemical method  in  a  cell  consisting  of  two  plate  carbon  as  electrodes.  The electrodes distance was set to 2.6 to 4 cm and immersed in solution at dimensions of (5 ×2) cm. The electrodes were connected to the positive and negative terminals of a DC power supply for 1 to 2.5 hours. The voltage was varied from 5 to 15 V at constant stirring and room temperature. The resulted suspension was aged for 48 hours. The solution wasfiltered. The powder dried directly in an oven at 150°C for 2 hours, washed 2 times, and dried again 60 °C for 6 hours. In this work, the voltage, electrode distance, and TiCl4 initial concentration can control the phase structure of TiO2.