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All Journal Jurnal Ilmu Pertanian Indonesia VALENSI agriTECH KOVALEN: Jurnal Riset Kimia Science and Technology Indonesia Indonesian Journal of Chemistry Jurnal Perikanan Universitas Gadjah Mada Indonesian Journal of Applied Research (IJAR) Jurnal Pijar MIPA Makara Journal of Science Journal of Pharmaceutical and Sciences. Halal Studies and Society

Noviyan Darmawan

Department Of Chemistry, Bogor Agricultural University, Jl. Agatis, Kampus IPB Darmaga, Bogor 16680

Author-ID : 3957404

Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences

Published : 21 Documents Claim Missing Document

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Synthesis of Fluorescence Carbon Nanoparticles from Ascorbic Acid Sri Sugiarti; Noviyan Darmawan
Indonesian Journal of Chemistry Vol 15, No 2 (2015)
Publisher : Universitas Gadjah Mada

Carbon nanoparticles (C-dot) are materials that belong to a class of 0-dimensional nanoparticles with a photoluminescence property. C-dot can be synthesized from a variety of organic acids through bottom-up synthetic methods or from other source of inorganic carbons through top-down synthetic methods. Herein, we report a simple and fast synthesis method for the formation of C-dot from ascorbic acid using microwave heating technique. The success of this synthesis was shown by visual analysis, UV-Vis spectroscopy, fluorescence spectroscopy, and transmission electron microscopy (TEM). Visual analysis showed an increased in fluorescence intensity with the addition of urea as a passivation agent. The maximum fluorescence emission of the C-dot was a blue green color at wavelength 500 nm, after the C-dot was excited at a wavelength of 400 nm. The TEM analysis showed that the synthesized C-dot had an average size of 18 nm. We also conducted a preliminary study on the synthesized C-dot as a heavy ion metal sensor and found selective identification of Cr metal.

Detection of Hg2+ Metal Ions Using Silver Nanoparticles Stabilized by Gelatin and Tween-20 Lilis Sulistiawaty; Sri Sugiarti; Noviyan Darmawan
Indonesian Journal of Chemistry Vol 15, No 1 (2015)
Publisher : Universitas Gadjah Mada

Silver nanoparticles were synthesized by reduction method using glucose as reducing agent for precursor AgNO3. This research was aimed at comparing the stability and performance of silver nanoparticles with stabilizer gelatin (Gelatin-AgNPs) and tween-20 (Tween-AgNPs) produced from the synthesis to the silver nanoparticles without stabilizer, and applying the Gelatin-AgNPs and Tween-AgNPs to detect heavy metal in water sample. The silver nanoparticles produced were characterized using UV-Vis spectrophotometer and Transmission Electron Microscopy (TEM). From measurement of UV-Vis spectrophotometer, the absorbance wavelength of silver nanoparticles (AgNPs) appeared in range 411 nm, Gelatin-AgNPs in 417 nm, and Tween-AgNPs in 420 nm. The identification using TEM showed the average size for each AgNPs, Gelatin-AgNPs, and Tween-AgNPs was 11.73, 9.68, and 17.54 nm, respectively. The result showed that Gelatin-AgNPs has better stability compared to Tween-AgNPs. The reaction of Gelatin-AgNPs and Tween-AgNPs with several ions showed color changes of Gelatin-AgNPs and Tween-AgNPs occurred only on addition to Hg2+ metal ions solution. Based on the experiment of Hg2+ metal ions determination this method has limit of detection of 0.45 mg/L for Gelatin-AgNPs and 0.13 mg/L for Tween-AgNPs.

Synthesis of TiO2/Carbon Nanoparticle (C-dot) Composites as Active Catalysts for Photodegradation of Persistent Organic Pollutant Dedri Syafei; Sri Sugiarti; Noviyan Darmawan; Mohammad Khotib
Indonesian Journal of Chemistry Vol 17, No 1 (2017)
Publisher : Universitas Gadjah Mada

TiO2/C-dot composites were synthesised by sol-gel method and investigated as catalysts for photocatalytic degradation of persistent organic pollutants (perchloroethylene, PCE). The composites photoluminescence properties was shown by visual analysis and the synthesis product was characterized by XRD, FTIR, fluorescence spectrophotometer, and UV-Vis spectrophotometer. Degradation of PCE 0.1% (v/v) in the aqueous phase was investigated under sunlight irradiation for 2 h. Photodegrade efficiency of PCE was determined by GC. Composites of TiO2/C-dot 2.5% (w/w) was succesfully to degrade PCE under sunlight irradiation and its photodegrade efficiency was up to 89.45%.

Co-Authors Ali, Mohamad Makrus Ani Suryani Suryani Arrahman, Naufal Bella Fitri Rahmantika Cahyorini Kusumawardani Cece Sumantri Dedri Syafei Dedy Duryadi Solihin Dias Indrasti DIMAS ANDRIANTO Dini, Vianda Mayeri Dwiatmoko, Adid Adep Dwiyani, Dewa Ayu Made Safira Fadila, Rina Fitriana Faradisa Anindita Fendy, Fendy Firdaus, Dzikri Anfasa Gina, Safira Ida Ayu Putu Sri Widnyani Indriani, Mutiara Rachmina Irma Herawati Suparto Isalmi Aziz Jati, Andreas Ary Chrisna Khairani, Najwa Azka Lilis Sulistiawaty Lubis, Rifaldy Setiawan M.Saad, Nabilatul Rafi’ah Mala Nurilmala Mas’ud, Zainal Alim Mohammad Khotib Mubayyinah, Hamidatul Muh Tazri Nasirullah Muhammad Faqih Mukhlisin Mukhlisin, Muhammad Faqih Murheza, Kevin Nancy Dewi Yuliana Pranata, Agy Wirabudi Purwantiningsih Sugita Rahmagiarti, Cintera Rudhatin, Fayca Safitri, Idayu Sanneh, Kally Sari , Intan Dias Sitompul, Dina Wardani Sri Sugiarti Supratikno Suryawan, Chinesia Prastialin TATI NURHAYATI Tetty Kemala Tun Tedja Irawadi Ummah, Isna Mustafiatul Yuli Rahmawati Yuni Cahya Endrawati Yusuf Bramastya Apriliyanto Zainal Alim Mas'ud

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