Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Padang, Indonesia
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@article{JKSA65990, author = {Nurhasni Nurhasni and Annisaul Izzah and Aisyah Dwitami and Yuza Gumilang and Zilfa Zilfa and Diana Wellia}, title = {Utilization of Shrimp Shell Waste as Nitrogen Source in N-Doped TiO₂ for Degradation of Polyethylene Microplastics}, journal = {Jurnal Kimia Sains dan Aplikasi}, volume = {28}, number = {3}, year = {2025}, keywords = {N-doped TiO₂; Shrimp shells; Solvothermal; Photocatalytic; Microplastics}, 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 TiO 2 (N-TiO 2 ) nanoparticles under visible light. The N-TiO 2 nanoparticles were synthesized via the solvothermal method, utilizing chitosan derived from shrimp shell waste as a nitrogen source. The photocatalytic efficacy of the N-TiO 2 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-TiO 2 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 TiO 2 . The incorporation of nitrogen into the TiO 2 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 TiO 2 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 TiO 2 . This study highlights the sustainable use of shrimp shell waste as a nitrogen source for enhancing TiO 2 nanoparticles, showcasing their potential for environmental remediation applications.}, issn = {2597-9914}, pages = {115--121} doi = {10.14710/jksa.28.3.115-121}, url = {https://ejournal.undip.ac.id/index.php/ksa/article/view/65990} }
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