화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.91, 149-166, November, 2020
DOI10.1016/j.jiec.2020.07.049  Export Citation
Effective charge separation through the sulfur vacancy interfacial in n-CdO/p-CdS bulk heterojunction particle and its solar-induced hydrogen production
Byung Hyun Park, Junhee Lee, Hyerim Park, Jeong Yeon Do†, Youngsoo Kim, Rama Krishna Chava, and Misook Kang†
  • Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
E-mail:,
The composites are still worth researching, because the catalytic performance greatly varies depending on the ways when two or more particles are grafted. In this study, we report a n-CdO/p-CdS bulk heterojunction (BHJ) nanostructures with abundant sulfur vacancy defects to improve the photoexcited charge separation during the photocatalytic reactions. The n-CdO/p-CdS nanostructured photocatalyst exhibits extended visible light absorption, reduced electron-hole recombination rate and improved photoexcited charge carriers generation, transfer and separation capability. Moreover, electronic band differences between the CdS and CdO bulk junctions creates the sulfur vacancies via CdSO3. The hydrogen production amount of the 1CdO/2CdS catalyst (1.2 μmolㆍg-1) shows a remarkable performance that is 10 times higher than that of the CdO (0.02 μmolㆍg-1) and CdS (0.07 μmolㆍg-1) single particle catalysts. The improved photocatalytic activity can be ascribed to the intimate interfacial contact between CdS and CdO nanostructures, sulfur vacancies and efficient charge carrier separation.
Keywords:n-CdO/p-CdS BHJ catalyst;CdSO3 BHJ interfacial;Effective charge separation;Hydrogen production;Water splitting
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