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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI The Journal of Pure and Applied Chemistry Research Jurnal Fisika Unand Jurnal Riset Kimia Jurnal Kimia dan Kemasan Jurnal Litbang Industri Indonesian Journal of Chemistry Akta Kimia Indonesia Molekul: Jurnal Ilmiah Kimia Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Jurnal Kimia dan Kemasan Jurnal Litbang Industri Journal Of Research and Education Chemistry (JREC) Jurnal Katalisator Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Kimia Unand
Wellia, Diana Vanda
Andalas University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Other

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Degradasi Zat Warna Direct Red-23 dan Direct Violet Dengan Metode Ozonolisis, Fotolisis Dengan Sinar Uv dan Cahaya Matahari Menggunakan Katalis N-Doped TiO2 Safni Safni; Deby Anggraini; Diana Vanda Wellia; Khoiriah Khoiriah
Jurnal Litbang Industri Vol 5, No 2 (2015)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1259.876 KB) | DOI: 10.24960/jli.v5i2.675.123-130

Abstract

Direct red-23 and Direct violet are non-biodegradable compounds containing azo component and carcinogenic. Direct red-23 and Direct violet had been degraded by ozonolysis, photolysis with UV lamp and solar irradiation methods using N-doped TiO2 catalyst. UV/Vis Spectrophotometer at wavelength 300-800 nm was used to measure the absorption of sample solution. The optimum weight of N-doped TiO2 catalyst was 20 mg. From the three methods obtained that ozonolysis method was the faster degradation process than photolysis with UV and solar irradiation. Direct red-23 and Direct violet was degraded as much as 55 and 50% within 20 minutes by ozonolysis.ABSTRAKZat warna Direct red-23 dan Direct violet merupakan senyawa non-biodegradable yang mengandung senyawa azo dan bersifat karsinogen. Direct red-23 dan Direct violet didegradasi menggunakan metode ozonolisis, fotolisis dengan sinar UV dan dengan penyinaran matahari, tanpa dan dengan katalis N-doped TiO2. Hasil penelitian diukur dengan spektrofotometer UV-Vis pada panjang gelombang 300-800 nm. Berat optimum katalis N-doped TiO2 didapatkan 20 mg. Dari ketiga metode didapatkan bahwa proses degradasi pada metode ozonolisis paling cepat dibandingkan dengan fotolisis sinar UV dan cahaya matahari. Direct red-23 dan Direct violet dapat didegradasi sebanyak 55 dan 50% dalam waktu 20 menit.
SrTiO3 Nanokubus: Sintesis, Kontrol Morfologi dan Sifat Termoelektrik (Tinjauan) Yulia Eka Putri; Ratesha Najela; Nova Andriani; Diana Vanda Wellia
Akta Kimia Indonesia Vol 6, No 1 (2021)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25493736.v6i1.9167

Abstract

Thermoelectrics (TE), enabling the conversion of heat energy into electricity directly, provide the opportunity as alternative energy for conventional power generator with high efficiency. To date, bulk SrTiO3 nanocubes is the most promising oxide-based TE materials candidate. The nanoarchitecture of 3-dimensional SrTiO3 nanocubes (3D-STO) is the main target in realizing high performance TE materials with high ZT value comparable to commercially available telluride-based compound. The proper synthesis method is needed to form SrTiO3 with uniform nano-sized cubic particles. Liquid synthesis technique namely hydrothermal and solvothermal, succeeded in forming 20 nm of SrTiO3 nanocubes with high crystallinity and homogeneous morphology
Morphology-Controlled Synthesis Of SrTiO3 Nanocube By Capping Agent-Assisted Solvothermal Method Yulia Eka Putri; Alvionita Alvionita; Rini Rahma Yanti; Diana Vanda Wellia
Molekul Vol 11, No 1 (2016)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (295.473 KB) | DOI: 10.20884/1.jm.2016.11.1.191

Abstract

The synthesis of SrTiO3 nanocubes have been carried out by solvothermal process using cetyl trimethyl ammonium bromide (CTAB) as capping agent to control the particles morphology. The condition of the synthesis was obtained at 160 ºC for 24 hours with molar ratio of SrTiO3 and capping agent was 1 : 1. The X-ray diffraction (XRD) pattern shows that SrTiO3 adopts a perovskite structure with a higher intensity of 110 at 2q:32.33º and the crystallite size calculated from FWHM was found to be 41 nm. Fourier transform infrared (FTIR) spectrum shows a shift in particular absorption band attributed the interaction between SrTiO3 particles surface and the head group of CTAB molecules. Transmission electron microscopy (TEM) image shows the cubic-like particles of SrTiO3, this indicatesthat CTAB successfully functions as capping agent on the synthesis of SrTiO3.
Degradation of Paracetamol by Photolysis Using C-N-codoped TiO2 Vanny Yulia Safitri; Adlis Santoni; Diana Vanda Wellia; Khoiriah Khoiriah; Safni Safni
Molekul Vol 12, No 2 (2017)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (410.615 KB) | DOI: 10.20884/1.jm.2017.12.2.378

Abstract

Paracetamol is generally used as analgesic and antipyretic drugs. Contamination paracetamol in the environment can occur because of waste material disposal from production site and immediate disposal of household that cause water pollution. Paracetamol is degraded by photolysis method under irradiation 10 watt UV-light (λ=365 nm), visible-light (Philips LED 13 watt 1400 lux) and solar-light with and without addition C-N-codoped TiO2catalyst. The solution is analyzed by UV-Vis spectrophotometer at λ 200-400 nm. Optimum weight of C-N-codoped TiO2 catalyst obtained is 20 mg under UV-light photolysis. Paracetamol 4 mg/L is degraded 45.48% after 120 minutes under UV-light irradiation without catalyst, and increases to be 69.31% by using 20 mg catalyst. While degradation percentage of paracetamol is 16.96 % without catalyst, the percentage increases to be 34.29% after using 20 mg catalyst for 120 minutes photolysis under visible-light. Degradation of paracetamol by solar light achieves only 12.27% in absance of catalyst for 120 minutes irradiation, but it increases significantly until 70.39% in presence of 20 mg catalyst.
Budidaya Ikan Lele untuk Menunjang Kelancaran Biaya Operasional TPQ dan RTQ Raudhatul Adzkia Jorong Dalam Koto Kabupaten Agam Refilda Refilda; Rahmiana Zein; Yefrida Yefrida; Zilfa Zilfa; Upita Septiani; Syukri Syukri; Diana Vanda Wellia; Syafrizayanti Syafrizayanti; Matlal Fajri Alif; Elida Mardiah; Refinel Refinel; Admi Admi; Emil Salim; Fitratul Ilahi; Dwi Syukur Phameswari
Warta Pengabdian Andalas Vol 28 No 3 (2021)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.28.3.206-214.2021

Abstract

The Qur'an Education Park (TPQ) and Tahzhul Qur'an House (RTQ) of the Raudhatul Adzkia Jorong Dalam Koto Nagari Koto Tangah, Tilatang Kamang, and District of Agam have been launched since 2015. The students who study here are free of charge. The operational costs of education and the honorarium for educators come from donations from their community and some nomads. However, this contribution is not sufficient for operational costs. The Department of Chemistry's community service team, Andalas University, collaborated with partners to start a business to solve this problem. The business was carried out using vacant land owned by partners for catfish cultivation. Surveys, program socialization and assisting activities were carried out online using virtual media, while Partners carried out the implementation in the field. Activities carried out were pond preparation, the release of catfish seeds, feeding, sorting, maintenance, harvesting, and marketing cultivated catfish. Based on the evaluation, 5000 seedlings from the released catfish developed well. About 99% of catfish typically growth to a large and even size, while the other 1% growth relatively slowly. Harvested catfish were sold for IDR 18,000/kg for wet fish and IDR 100,000/kg for dried fish. This business has been carried out sustainably by partners, and the profits have been used to support the operational costs of TPQ and RTQ Raudhatul Adzkia.
Degradasi Pestisida Diazinon dengan Proses Fotokatalisis Sinar Matahari Menggunakan Katalis C,N-CODOPED TiO2 Khoiriah Khoiriah; Diana Vanda Wellia; Safni Safni
Jurnal Kimia dan Kemasan Vol. 41 No. 1 April 2019
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v41i1.3834

Abstract

Diazinon merupakan salah satu pestisida organofosfat yang sangat luas penggunaannya di bidang pertanian, namun ia bersifat sangat beracun. Pada penelitian ini diazinon didegradasi secara fotokatalisis menggunakakan katalis C,N-codoped TiO2 yang aktif pada sinar matahari. Beberapa faktor yang mempengaruhi proses degradasi dipelajari seperti massa katalis, pengaruh doping pada titania, pH larutan awal, dan waktu irradiasi. Penambahan katalis C,N-codoped TiO2 mampu meningkatkan persen degradasi diazinon secara siginifikan. Diazinon dengan konsentrasi awal 18 mg/l dan volume 20 ml terdegradasi sebesar 90,75% pada kondisi optimum pH 7, 12 mg katalis C,N-codoped TiO2, selama 300 menit fotokatalisis sinar matahari. Data hasil analisis High Performance Liquid Chromatography (HPLC) menunjukkan bahwa diazinon telah berhasil didegradasi.
Photocatalytic Degradation of Commercial Diazinon Pesticide Using C,N-codoped TiO2 as Photocatalyst Khoiriah Khoiriah; Diana Vanda Wellia; Jarnuzi Gunlazuardi; Safni Safni
Indonesian Journal of Chemistry Vol 20, No 3 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.666 KB) | DOI: 10.22146/ijc.43982

Abstract

Diazinon (C12H21N2O3PS) is an effective pest controller that has been frequently used by farmers in agriculture. It is a nonspecific and highly toxic pesticide having low persistence in the environment and categorized as moderately hazardous class II. The degradation of commercial diazinon in aqueous solution was investigated by photocatalysis using low-energy activated C,N-codoped TiO2 as catalyst under visible-light. The influence of some parameters, i.e., catalyst concentration, the initial concentration of diazinon, initial pH of diazinon, and irradiation time on the diazinon degradation was studied. The amount of diazinon degradation was strongly influenced by all the above parameters. The results show that titania-modified enhanced the degradation percentage of diazinon, from 44.08% without a catalyst to 86.93% by adding 12 mg C,N-codoped TiO2 catalyst after 30 minutes visible-light irradiation. UV-visible spectrophotometer, HPLC, and COD analysis verified that diazinon was successfully degraded under photocatalysis visible.
Fabrication of Superhydrophobic Film on the Surface of Indonesian Bamboo Timber by TiO2 Deposition and Using Octadecyltrichlorosilane as a Surface Modifier Agent Diana Vanda Wellia; Wulandari Wulandari; Arifah Mustaqimah; Nurul Pratiwi; Yulia Eka Putri
Indonesian Journal of Chemistry Vol 20, No 4 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (699.075 KB) | DOI: 10.22146/ijc.46740

Abstract

The tropical bamboo has been widely used in modern society as a potential material for various applications. It is well known that bamboo has low durability due to its hydrophilic properties. To overcome this problem, the superhydrophobic surface on Indonesian bamboo timber had been successfully fabricated via hydrothermal deposition of an anatase TiO2 and solution immersion of octadecyltrichlorosilane (ODTS), which exhibited a maximum water contact angle (WCA) of 155°. The as-fabricated superhydrophobic bamboo timber not only showed high mechanical resistance against the abrasion of SiC sandpaper but had also been proven to possess high chemical stability after immersion in acidic and basic aqueous solutions. Moreover, the superhydrophobic bamboo timber also demonstrated excellent self-cleaning and flame-resistance properties, in comparison to pure bamboo timber. It is believed that the strategy offered in this study can increase the utilization of bamboo timber for various purposes, especially as a self-cleaning material.
Degradasi Zat Warna Direct Red-23 dan Direct Violet Dengan Metode Ozonolisis, Fotolisis Dengan Sinar Uv dan Cahaya Matahari Menggunakan Katalis N-Doped TiO2 Safni Safni; Deby Anggraini; Diana Vanda Wellia; Khoiriah Khoiriah
Jurnal Litbang Industri Vol 5, No 2 (2015)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1259.876 KB) | DOI: 10.24960/jli.v5i2.675.123-130

Abstract

Direct red-23 and Direct violet are non-biodegradable compounds containing azo component and carcinogenic. Direct red-23 and Direct violet had been degraded by ozonolysis, photolysis with UV lamp and solar irradiation methods using N-doped TiO2 catalyst. UV/Vis Spectrophotometer at wavelength 300-800 nm was used to measure the absorption of sample solution. The optimum weight of N-doped TiO2 catalyst was 20 mg. From the three methods obtained that ozonolysis method was the faster degradation process than photolysis with UV and solar irradiation. Direct red-23 and Direct violet was degraded as much as 55 and 50% within 20 minutes by ozonolysis.ABSTRAKZat warna Direct red-23 dan Direct violet merupakan senyawa non-biodegradable yang mengandung senyawa azo dan bersifat karsinogen. Direct red-23 dan Direct violet didegradasi menggunakan metode ozonolisis, fotolisis dengan sinar UV dan dengan penyinaran matahari, tanpa dan dengan katalis N-doped TiO2. Hasil penelitian diukur dengan spektrofotometer UV-Vis pada panjang gelombang 300-800 nm. Berat optimum katalis N-doped TiO2 didapatkan 20 mg. Dari ketiga metode didapatkan bahwa proses degradasi pada metode ozonolisis paling cepat dibandingkan dengan fotolisis sinar UV dan cahaya matahari. Direct red-23 dan Direct violet dapat didegradasi sebanyak 55 dan 50% dalam waktu 20 menit.
Degradasi senyawa fenol secara fotokatalisis dengan menggunakan katalis C-doped TiO2 S Safni; Vepilia Wulanda; K Khoiriah; Diana Vanda Wellia
Jurnal Litbang Industri Vol 9, No 1 (2019)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (405.838 KB) | DOI: 10.24960/jli.v9i1.4675.51-57

Abstract

Fenol merupakan senyawa kimia yang banyak digunakan dalam proses industri. Akan tetapi fenol dalam konsentrasi berlebihan dapat menimbulkan efek buruk terhadap kehidupan manusia dan lingkungan pada umumnya. Pada penelitian ini, fenol didegradasi secara fotolisis tanpa dan dengan menggunakan  katalis TiO2/C di bawah sinar UV (10 Watt, λ= 365 nm) dan sinar tampak (lampu philips LED 13 watt 1400 lux, λ= 465-640 nm). Larutan fenol yang telah didegradasi diukur dengan Spektrofotometer UV-Vis pada panjang gelombang 200-400 nm. Hasil karakterisasi XRD dan DRS UV-Vis memperlihatkan bahwa katalis modifikasi titania menggunakan unsur karbon berpotensi aktif pada sinar tampak. Aplikasi katalis TiO2/C mampu meningkatkan efisiensi dari degradasi fenol pada sistem fotolisis. Larutan fenol 8 mg/L terdegradasi sebanyak 38,98% dan 35,59% tanpa katalis dan meningkat menjadi 51,69% dan 66,10% dengan penambahan 5 mg katalis TiO2/C masing-masing di bawah sinar UV dan sinar tampak.ABSTRACTPhenol is a chemical compound that is widely used in industrial processes. However, phenol in excessive concentration can endanger human life and the environment. In this study, phenol was degraded without and using TiO2/C catalyst under UV-light (10 Watts, λ = 365 nm) and visible-light (13 watt Philips, lux= 1400, λ = 465-640 nm) photolysis. The degraded of phenol solution was measured by a UV-Vis spectrophotometer at a wavelength 200-400 nm. The results of XRD and DRS UV-Vis characterization show that the modified of titania catalyst using carbon potentially actives in visible-light. Application of TiO2/C catalyst can improve the efficiency of phenol degradation in photolysis system. Phenol solution with concentration 8 mg/L was degraded by 38.98% and 35.59% without catalyst and increased to be 51.69% and 66.10% in presence of 5 mg TiO2/C catalyst under UV-light and visible-light, respectively.
Co-Authors Adlis Santoni Admi Admi Alvionita Alvionita Anggraini, Deby Arifah Mustaqimah Arifah Mustaqimah Arniati Labbani Asep Saefumillah Atika Syafawi Attalario, Evan Atthar Luqman Ivansyah Benny Hidayat Deby Anggraini Dina Nofebriani Dwi Syukur Phameswari Dwitami, Aisyah Rahma Dytta Fitria Elida Mardiah Emil Salim Emriadi - Famella Azhara Febby Alvionita GEBBY FEBRILIA IRWANDA Geliz Luh Titisari Gumilang, Yuza Ahmad Ilahi, Fitratul Islami, Dini Muthi'ah Izzah, Annisaul Jarnuzi Gunlazuardi K Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah, Khoiriah Kiki Adi Kurnia Kusumawati, Yuly M. Rafli Habibillah Mahadika, Bella Sukma Mai Efdi Matlal Fajri Alif Melvi Muharmi Merida Saputri Muhammad Hafiz Reza Muldarisnur, Mulda Nova Andriani Nova Andriani Novesar Jamarun Novianti, Noni Nurhasni Nurhasni Nurul Pratiwi Putri Julanda Ardica Putri, Gusliani Eka Rahma, Resha Mutia Rahmadhini Anwar Rahmayeni Rahmayeni Rahmayeni Rahmiana Zein Ramona, Fransischa Ratesha Najela Rathesa Najeela Refilda Refilda Refinel - Reza Audina Putri Reza Audina Putri Rini Rahma Yanti Rizka Rahmadini RR. Ella Evrita Hestiandari Saepurahman, Saepurahman Safni Safni Shelvira Edelwita Siti Zahara Syafrizayanti Syafrizayanti Syukri Syukri Syukri Syukri Thalabul Ilmi Tio Putra Wendari Upita Septiani Upita Septiani Vanny Yulia Safitri Vepilia Wulanda Wulandari Wulandari Wulandari Wulandari Wulandari Wulandari Yanni, Rahma Yefrida Yefrida Yeni Stiadi Yuli Okta Fitriyani Yulia Eka Putri Yulia Eka Putri Yulia Eka Putri, Yulia Eka Yulizar Yusuf Zilfa Zilfa Zulhadjri Zulhadjri