Advancement of visible light-driven photocatalytic degradation of dimethyl sulfide by Zn doped rGO/TiO2

Mei Chi Chong, Birgitta Narindri Rara Winayu, Hsin Chu

研究成果: Article同行評審

摘要

In this study, visible light-driven photocatalytic degradation of dimethyl sulfide (DMS) by nanocomposite photocatalyst was achieved through doping TiO2 with reduced graphene oxide (rGO) and various contents of Zn via solvothermal method. Doping of Zn led to formation of oxygen defects and presence of Ti3+ which further promoted photocatalytic activity. After modification, formation of lower level band gap between VB and CB reduced required energy for electron excitation and accelerated light energy utilization. Besides, the presence of surface oxygen vacancies enhanced photocatalytic activity via adsorption of exoteric oxygen. The best DMS conversion (almost 50 %) was performed by 0.1rGO/Zn1TiO2 under typical indoor environment at 60 % RH. Declining of relative humidity to below 10 % improved photocatalytic degradation of DMS due to lower competitive adsorption of water vapor. The best fitting by Langmuir-Hinshelwood kinetics model 4 also supported the occurrence of competitive adsorption with water vapor. Moreover, detection of generated intermediates was used in development of proposed reaction mechanism. Thus, the discussion on DMS photocatalytic degradation over Zn/rGO/TiO2 could be comprehensively conducted from the preparation, characterization, stability test, proposed reaction mechanism, and kinetic study.

原文English
文章編號159048
期刊Applied Surface Science
648
DOIs
出版狀態Published - 2024 3月 1

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 表面和介面
  • 表面、塗料和薄膜

指紋

深入研究「Advancement of visible light-driven photocatalytic degradation of dimethyl sulfide by Zn doped rGO/TiO2」主題。共同形成了獨特的指紋。

引用此