Construction of titanium dioxide/cadmium sulfide heterojunction on carbon fibers as weavable photocatalyst for eliminating various contaminants

Yan Zhang; Zhun Shi; Li Luo; Zixiao Liu; Daniel K Macharia; Gumila Duoerkun; Chensi Shen; Jianshe Liu; Lisha Zhang

doi:10.1016/j.jcis.2019.10.105

Construction of titanium dioxide/cadmium sulfide heterojunction on carbon fibers as weavable photocatalyst for eliminating various contaminants

J Colloid Interface Sci. 2020 Mar 1:561:307-317. doi: 10.1016/j.jcis.2019.10.105. Epub 2019 Oct 30.

Authors

Yan Zhang¹, Zhun Shi², Li Luo², Zixiao Liu³, Daniel K Macharia³, Gumila Duoerkun², Chensi Shen², Jianshe Liu², Lisha Zhang⁴

Affiliations

¹ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
² State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
³ International Joint Laboratory for Advanced Fiber and Low Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
⁴ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address: [email protected].

PMID: 31767392
DOI: 10.1016/j.jcis.2019.10.105

Abstract

Semiconductor heterojunction powders have exhibited the enhanced photocatalytic activities, but their practical applications have been limited due to their poor recycling performance from flowing wastewater. To solve these problems, with carbon fibers (CFs) as the fixing substrate, we constructed TiO₂/CdS heterojunction as a model on CF surface by utilizing a hydrothermal-chemical bath deposition method. CFs/TiO₂/CdS bundles display a wide photoabsorption with two photoabsorption edges (~410 and 520 nm). Furthermore, CFs/TiO₂/CdS bundles can be weaved into macroscopical cloth (such as weight: 0.1 g, area: 4 × 4 cm²) which have considerable photocurrent density of 5.75 × 10^-6 A/cm². Under visible light irradiation (λ > 400 nm), macroscopic CFs/TiO₂/CdS cloth can degrade 95.44% methylene blue (MB), 64.95% acid orange 7 (AO7), 91.37% tetracycline hydrochloride (TC) and remove 90.70% hexavalent chromium (Cr(VI)) after 120 min, higher than those by CFs/CdS (43.42% MB, 37.42% AO7, 31.76% TC and 30.45% Cr(VI)) or CFs/TiO₂ (12.84% MB, 10.48% AO7, 11.85% TC and 15.58% Cr(VI)). Thus, CFs/TiO₂/CdS can act as a weavable and efficient photocatalyst for eliminating various pollutants from wastewater.

Keywords: CFs/TiO(2)/CdS; Photocatalysis; Visible-light; Weave.