J. Mater. Sci. Technol. ›› 2023, Vol. 162: 90-98.DOI: 10.1016/j.jmst.2023.03.054

• Research Article • Previous Articles     Next Articles

CdS decorated resorcinol-formaldehyde spheres as an inorganic/organic S-scheme photocatalyst for enhanced H2O2 production

Bicheng Zhua, Jingjing Liub, Jian Suna, Fei Xiea, Haiyan Tanc, Bei Chengb,*, Jianjun Zhanga,*   

  1. aLaboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430078, China;
    bState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;
    cSchool of Chemistry and Environmental Engineering, Hubei University for Nationalities, Enshi 445000, China
  • Received:2023-03-03 Revised:2023-03-18 Accepted:2023-03-20 Published:2023-11-01 Online:2023-05-19
  • Contact: *E-mail addresses: chengbei2013@whut.edu.cn (B. Cheng), zhangjianjun@cug.edu.cn (J. Zhang).

Abstract: Photocatalytic H2O2 production provides a clean and sustainable strategy for artificial photosynthesis. Herein, an inorganic/organic composite photocatalyst was fabricated by in-situ growth of CdS nanoparticles on the surface of resorcinol-formaldehyde (RF) resin spheres. RF spheres played multiple roles: (i) acting as a substrate for the growth of CdS and constructing a core-shell structure with seamless contact; (ⅱ) improving visible light absorption of CdS; (ⅲ) forming an S-scheme heterojunction with CdS and promoting the charge separation and transfer. Consequently, under visible light illumination, CdS/RF composite presented remarkably enhanced H2O2 production activity. Its H2O2 yield in 60 min was 801 μmol L-1, which was 5.2 and 1.5 times higher than that of RF spheres and CdS hollow spheres, respectively. The charge migration between CdS and RF followed the S-scheme photocatalytic mechanism, which was verified by work function measurement, ex-situ and in-situ irradiated X-ray photoelectron spectroscopy. This work brings a novel insight into designing RF-based inorganic/organic S-scheme heterojunction photocatalysts for efficient H2O2 production.

Key words: Photocatalysis, Step-scheme heterojunction, Resorcinol-formaldehyde, Hydrogen peroxide, in-situ irradiated XPS