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All Journal VALENSI Sainstek Prosiding Pendidikan Sains Jurnal Fisika Unand Jurnal Riset Kimia Journal of Aceh Physics Society PROSIDING SEMINAR KIMIA Jurnal Litbang Industri Jurnal Zarah Chimica et Natura Acta Indonesian Journal of Chemistry Jurnal Ilmu Fisika Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Jurnal Litbang Industri Journal Of Research and Education Chemistry (JREC) Jurnal Taguchi : Jurnal Ilmiah Teknik dan Manajemen Industri Jurnal Medisains Kesehatan
Hermansyah Aziz
Chemistry Department Faculty Of Mathematics And Natural Sciences Universitas Andalas
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences Other

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Pembentukan Hidrogen dari Air Secara Fotokatalitik oleh Serbuk TiO2 yang Didoping Nitrogen Febrina Arfi; Hermansyah Aziz; Admin Alif
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 2, November 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (568.005 KB) | DOI: 10.15408/jkv.v2i2.3077

Abstract

Abstrak   Kesadaran terhadap ancaman krisis energi karena kebutuhan yang sangat besar dan pencemaran lingkungan yang terjadi, maka perlu dilakukan penelitian untuk menghasilkan sumber energi alternatif. Hidrogen merupakan energi alternatif yang dapat digunakan sebagai bahan bakar, ramah lingkungan, dan dihasilkan dari sumber yang melimpah di bumi  yaitu air. Salah satu metode yang dipakai untuk memproduksi gas hidrogen adalah metode fotolisis. Katalis yang digunakan adalah TiO2 yang didoping N, tujuannya mempelajari pengaruh variasi perbandingan TiO2/N terhadap aktifitas fotokatalitik pembentukan hidrogen. Hasil penelitian memperlihatkan produksi gas menggunakan TiO2/N pada kondisi optimum terjadi pada perbandingan 4:6 yang menghasilkan gas 2.2 mL. Dari hasil penelitian dapat disimpulkan bahwa TiO2 doping N dapat membantu pembentukan gas secara fotokatalitik.   Kata kunci : Fotolisis, katalis, doping, fotokatalitik Abstract The awareness about energy crisis is rising quickly. Consider to the very fast growing need of energy and the environmental impact caused by the conventional energy, so that the research about renewable energy as an alternative energy resource is very urgent. Therefore, the research to produce hydrogen as an alternative energy resourse was conducted. Hydrogen can be used as a green fuel which can be extracted from water, a huge amount of resource on the earth. In this research, the photolysis method was used. Nitrogen-doped TiO2 catalyst was used in order to analyse the influence of variational ratio of TiO2/N to the photocatalytic process of hydrogen production. The result shows that the optimum condition in producing gas using TiO2/N occured at the ratio 4:3 which produced as much as 2.2 ml gas. From this result can be concluded that Nitrogen-doped TiO2 supports the extraction of gas in photocatalytic process.   Keywords: Photolysis, catalys, doped, photocatalytic   DOI: http://dx.doi.org/10.15408/jkv.v0i0.3077
Degradation of Imidacloprid Residue on Red Tomatoes (Solanum lycopersicum) by Advanced Oxidation Processes and Analysis using Spectrophotometer and HPLC Safni Safni; Hazanita Jumiaty; Hermansyah Aziz
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 7, No. 2, November 2021
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v7i2.21630

Abstract

The insecticide imidacloprid (C9H10ClN5O2) common used by farmers to control pests on red tomato plants, is a dangerous substance classified as a Class II toxic. The imidacloprid residue in red tomatoes enters the body, it will lead to health problems. The purpose of this study was to determine the percentage of imidacloprid residue that can be degraded using the Advanced Oxidation Processes (AOPs) method, which includes sonolysis, sonozolysis, ozonolysis, ozone water, and the effect of various parameters. Processing time, water volume, and red tomato mass were the test parameters studied. The change in imidacloprid residue concentration during the degradation process was measured using a UV/Vis spectrophotometer (double beam) with a wavelength of 200-400 nm and HPLC with mobile phase composition used was acetonitrile/water (65:35 v/v). With a processing time of 10 minutes, the imidacloprid residue in red tomatoes can be degraded 57.38% by sonozonolysis, 63.51 % by sonolysis, 85.17 % by ozonolysis, and 88.76 % by ozone water. The imidacloprid residue in 75 g of red tomatoes could be removed as much as 91.65% by treating with ozone water for 15 minutes. HPLC analysis showed that no intermediate compounds were detected in the imidacloprid residue degradation process in red tomatoes.
Co-Authors -, Wiranda -, Yefrida A.A. Ketut Agung Cahyawan W Adlis Santoni Admi Admi Admin Alif Admin Alif Admin Alif Admin Alif Aghna Kamiko, Awfa Joti Agung Abadi Kiswandono Ahmad Hafizullah Ritonga Alif, Admin Alif, Admin Alif, Admin Amelina Dwika Hardi Aritonang, Barita Asih Novia Boy Isfa Boy isfa Bukasir, Yennie Puspa BUSTANUL ARIFIN Bustanul Arifin Chairani, Zulfa Dahyunir Dahlan Defri, Hadi Denny Akbar Tanjung Denny Akbar Tanjung Deswati Dewi, Riana Dwi Puryanti Eldya Mossfika Eldya Mossfika Emriadi - Erman Taer Febrina Arfi Gina Sania Girsang, Ermi Hamzar Suyani Hanifah, Mutia Hardi, Amelina Dwika Hary Sanjaya Hasnirwan Hasnirwan Hazanita Jumiaty honesti putri Ida Ayu Putu Sri Widnyani Ifham Azizi Surya Syafiin Indrawati Indrawati Jaslia, Pepi Rahmi Sari Joni, Rahma Joni, Rahma Leng, Tjiauw Siaw Luh Putu Ratna Sundari Mai Efdi Matlal Fajri Alif Muchammad Fauzi Murdiman, Imelda Nofita, Dewi Norita Tetra, Olly Norman Ferdinal Novesar Jamarun Novia, Asih Novrizaldi Wardana Nurul Afifah Olly Norita Tetra Perdana, Yola Azli Putri Ramadhani Putri, Ayu Deliana Rahadian Zainul Rahma Joni Rahma Joni Rahmiana Zein Raihan Hanif Aulia Refilda Refilda Rhieka Whulanda Riana Dewi Rikaryalita Novitra Safni Safni Savitri, Vivin Firman Solly Aryza Suarnikan Hulu Suci Mulya Prima Sumaryati Syukur Syukri Arief Syukri Darajat Syukri Syukri Syukri Syukri Syukri Syukri Syukri UNP Tifani Bella Febrianty Tjiauw Siaw Leng Vera Tri Ningsih Vivin Firman Savitri Wahyuni, Hanif Whulanda, Rhieka Wiranda - Yefrida - Yefrida Yefrida Yeni Stiadi Yennie Puspa Bukasir Yola Azli Perdana Yulidar Laila Safitri Yulizar Yusuf Zilfa Zilfa Zulfa Chairani Zulhadjri Zulhadjri Zulkarnain Chaidir