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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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Journal : JURNAL KIMIA SAINS DAN APLIKASI

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A New Combination Method of N-doped TiO2 Nanoparticles Synthesis for Heavy Metal Ions Cr(VI) Photoreduction Applications Diana Vanda Wellia; M. Rafli Habibillah; Atika Syafawi; Rizka Rahmadini; Rahmayeni Rahmayeni; Nurul Pratiwi
Jurnal Kimia Sains dan Aplikasi Vol 26, No 2 (2023): Volume 26 Issue 2 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.2.70-78

Abstract

Through a combination of biosynthetic and hydrothermal methods, N-doped TiO2 photocatalyst has been successfully synthesized using various concentrations of ammonia as a nitrogen source, namely 10% w/w (NTO10), 20% w/w (NTO20), 35% w/w (NTO35), and 50% w/w (NTO50). The synthesis of TiO2 was conducted using Aloe vera (L) Burm F. rind extract as a natural capping agent via the biosynthetic method, followed by a nitrogen doping process via the hydrothermal method. The X-ray Diffraction (XRD) analysis revealed that all phases were anatase. According to the results of the UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS) analysis using the Tauc-Plot method, all N-doped TiO2 samples showed a decrease in the energy gap compared to the TO sample. This indicates that the doping of TiO2 using nitrogen has been successfully doped into TiO2. The photocatalytic activity of N-doped TiO2 was evaluated for the photoreduction of the Cr(VI) model pollutant using a 24-watt LED lamp as a visible light source for 120 minutes. The results indicate that the NTO35 is the best-prepared N-doped TiO2, which showed a reduced rate for the Cr (VI) model pollutant of 50.88%, or two times greater than that of undoped TiO2.
Utilization of Shrimp Shell Waste as Nitrogen Source in N-Doped TiO₂ for Degradation of Polyethylene Microplastics Nurhasni, Nurhasni; Izzah, Annisaul; Dwitami, Aisyah Rahma; Gumilang, Yuza Ahmad; Zilfa, Zilfa; Wellia, Diana Vanda
Jurnal Kimia Sains dan Aplikasi Vol 28, No 3 (2025): Volume 28 Issue 3 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.3.115-121

Abstract

Microplastic pollution presents a significant challenge globally, posing serious threats to aquatic ecosystems. This study explores the photocatalytic degradation of microplastics in aqueous solutions by applying nitrogen-doped TiO2 (N-TiO2) nanoparticles under visible light. The N-TiO2 nanoparticles were synthesized via the solvothermal method, utilizing chitosan derived from shrimp shell waste as a nitrogen source. The photocatalytic efficacy of the N-TiO2 nanoparticles was assessed for degrading model polyethylene microplastics, illuminated by a 50-watt LED lamp. Characteristic peak shifts in the FTIR absorption spectrum, notably at 3429 cm-1 to lower wavenumbers, and diminished amide I absorption at 1621 cm-1, confirmed the successful extraction of chitosan from shrimp shell waste. The synthesized N-TiO2 nanoparticles were in the pure anatase phase, exhibited a reduced bandgap of 2.97 eV, and showed enhanced absorption in the visible light spectrum (λ=400 – 800 nm) compared to undoped TiO2. The incorporation of nitrogen into the TiO2 matrix was validated by vibration bands at approximately 1035 cm-1 and 535 cm-1, corresponding to the Ti—N and Ti—O—Ti bonds, respectively. Optimal results were attained with TiO2 nanoparticles doped with 50% nitrogen, achieving a degradation rate of approximately 30.45% of a 250 mg/L microplastic solution over 50 hours of visible light exposure—nearly six times more effective than undoped TiO2. This study highlights the sustainable use of shrimp shell waste as a nitrogen source for enhancing TiO2 nanoparticles, showcasing their potential for environmental remediation applications.
Co-Authors Adlis Santoni Admi Admi Alvionita Alvionita Anggraini, Deby Arifah Mustaqimah Arifah Mustaqimah Arniati Labbani Asep Saefumillah Atika Syafawi 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 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 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 Yulizar Yusuf Zilfa Zilfa Zulhadjri Zulhadjri