Hollow TiO2@CdS nanosphere: Interface construction for spatial charge separation and higher charge transfer efficiency. Issue 5 (October 2021)

• Record Type: Journal Article
• Authors: Guo, Na; Wang, Chuantao; Bao, Weiwei; Zeng, Ying; Yu, Hongwen
• Is Part Of: Journal of environmental chemical engineering. Volume 9:Issue 5(2021)
• Publication Date: 2021-10
• Subjects: Core@shell -- TiO2/CdS -- Interfacial area -- Spatial separation -- H2 generation; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2021.106211
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Hollow core@shell TiO2 @CdS composite was synthesized via facile and controlled homogeneous precipitation method, the as-prepared samples were characterized by XRD, SEM, TEM, FTIR, EDS UV–vis adsorption, and BJH. The results of the photocatalytic experiment demonstrated the TiO2 /CdS hybrid with Ti/Cd molar ratio of 1:2 (denoted as T/2C) possesses the highest photocatalytic activity, the degradation rate of T/2C towards methyl orange (MO) is 78% and 80% under simulated UV light and sun light, respectively. Additionally, T/2C also presents photocatalytic performance on H2 production (114.375 µmol/h g). Based on the experiment results, a probable charger transfer mechanism of T/2C was proposed. In view of the unique hollow structure and high photocatalytic characteristics, it is looking forward to exhibit great potential for applications in wastewater treatment and H2 evolution. Graphical Abstract: ga1 Highlights: Core@shell structure provides convenient conditions for spatial charge separation of photogenerated e - -h + pairs. Z-scheme mechanism improved charge separation rate efficiently.