The influence of the sacrificial agent nature on transformations of the Zn(OH)2/Cd0.3Zn0.7S photocatalyst during hydrogen production under visible light |
| |
| Authors: | Dina V. Markovskaya Svetlana V. Cherepanova Evgeny Yu. Gerasimov Angelina V. Zhurenok Aleksandra V. Selivanova Dmitry S. Selishchev Ekaterina A. Kozlova |
| |
| Affiliation: | Boreskov Institute of Catalysis SB RAS, Lavrentieva Ave., 5, Novosibirsk 630090 Russia, Fax: +7-383-333-16-17, +7-383-333-16-17 ; Novosibirsk State University, Pirogova Str., 2, Novosibirsk 630090 Russia |
| |
| Abstract: | ![]()
Photocatalysts based on zinc hydroxide and a solid solution of CdS and ZnS were prepared via the precipitation method and used for photocatalytic hydrogen production from aqueous solutions of inorganic (Na2S/Na2SO3) and organic (ethanol) sacrificial agents. The photocatalysts were tested in cyclic experiments for hydrogen evolution and studied using X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy, high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS) techniques. Different transformations of the β-Zn(OH)2 co-catalyst were observed in the presence of inorganic and organic sacrificial agents; namely, ZnS was formed in Na2S/Na2SO3 solution, whereas the formation of ε-Zn(OH)2 was detected in solution with ethanol. The composite Zn(OH)2/Cd1−xZnxS photocatalysts have great potential in various photocatalysis processes (e.g., hydrogen production, CO2 reduction, and the oxidation of organic contaminants) under visible light.The nature of the sacrificial agent affects the transformations of a Zn(OH)2 co-catalyst during photocatalytic hydrogen production. |
| |
| Keywords: | |
|
|
