光催化
三氧化钨
材料科学
化学工程
复合数
纳米复合材料
降级(电信)
光化学
催化作用
亚甲蓝
表面等离子共振
化学
核化学
纳米技术
纳米颗粒
钨
有机化学
复合材料
电信
计算机科学
工程类
冶金
作者
Sakthivel Kumaravel,C. Chandrasatheesh,R Saranya,Myoung‐Jin Kim,Imran Hasan,Jintae Lee,Mei–Ching Lin,Keerthika Kumarasamy,G. Palanisamy,B. Krishnakumar
标识
DOI:10.1016/j.jpcs.2023.111745
摘要
Herein, we report that the tungsten trioxide (WO3) nanosheets and 2%Ag/15%WO3/HNT (Ag/WO3/HNT) composite photocatalysts were synthesized by the hydrothermal process and solvent evaporation methods. Various characterization techniques such as XRD, FT-IR, FE-SEM, EDS, HR-TEM, and UV-DRS were used to investigate the bulk and surface properties of bare and composite photocatalysts. The photocatalytic performance of halloysite nanotube (HNT), WO3/HNT, and Ag/WO3/HNT composite photocatalysts were evaluated by methylene blue (MB) dye degradation efficiency under solar light irradiation for 90 min. Among the various catalysts, Ag/WO3/HNT photocatalyst showed significant photocatalytic performance (96% degradation for MB dye). The existence of Ag indicates that surface plasmon resonance (SPR) impacts the developed composite and acts as an electron mediator. The scavenger experiment showed that the superoxide radical anions play a significant role in MB degradation under solar light with the most active Ag/WO3/HNT photocatalyst. The degradation of the MB dye has been monitored by Total Organic Carbon (TOC) measurements. The degradation intermediates of MB were analyzed by GC-MS, and a suitable degradation pathway was proposed. The most active Ag/WO3/HNT photocatalyst was also found to be the most stable and recyclable. The trapping experiment with Ag/WO3/HNT composite catalyst has led to the development of a dye degradation mechanism.
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