Development of TiO2 catalyst based on Anderson-polyoxometalates for efficient visible-light-driven photocatalytic oxidative desulfurization. (1st February 2023)

• Record Type: Journal Article
• Authors: Liu, Qing; Su, Ting; Zhang, Haowei; Liao, Weiping; Ren, Wanzhong; Zhu, Zhiguo; Yang, Kaixuan; Len, Christophe; Yu, Jia; Zhao, Deyang; Lü, Hongying
• Is Part Of: Fuel. Volume 333(2023)Part 1
• Publication Date: 2023-02-01
• Subjects: Anderson type polyoxometalate -- TiO2 -- Photocatalytic oxidative desulfurization -- DBT removal; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.126286
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Anderson type POM modified TiO2 were synthesized through sol-hydrothermal preparation method. Photoactivity of Zn-Mo/TiO2 was enhanced by improved carriers separation and transfer. 100 % DBT was efficiently oxidized to DBTO2 in 30 min at 30 °C. Impressive recycling stability was founded even after five times under optimal conditions. Abstract: Photocatalytic oxidative desulfurization (PODS) is a novel emerged promising method for effectively removing sulfur compounds under milder operating conditions. Herein, Anderson type polyoxometalate (NH4 )4 ZnH6 Mo6 O24 modified TiO2 nanomaterial (named Zn-Mo/TiO2 ) was designed to oxidize DBT to DBTO2 under visible light irradiation with H2 O2, this catalyst was synthesized based on Anderson type polyoxometalate (NH4 )4 ZnH6 Mo6 O24 by a sol-hydrothermal method. Different experimental effects of Anderson type polyoxometalate modified TiO2 on the desulfurization conversion rate were investigated, including different (NH4 )4 ZnH6 Mo6 O24 contents, various catalyst dosage, additional sulfur-containing substrates and different oxygen sulfur ratios. 100 % sulfur removal can be achieved with (NH4 )4 ZnH6 Mo6 O24 /TiO2 catalyst in only 30 min under room temperature. The considerable enhancement of photocatalytic activity is associated with a synergistic effect between the multi-metal structure of polyoxometalate and TiO2, which are conducive to promoting the transfer and separation of photogenerated electrons and holes.