Co-Doped Zn_1−xCd_xS nanocrystals from metal–organic framework precursors: porous microstructure and efficient photocatalytic hydrogen evolution

Abstract

Nanoporous Co-doped ZnCdS were facilely fabricated via adopting ZIFs as templates, and Cd(NO) and thiourea as precursors. The highly porous microstructure and uniform Co-doping of the photocatalyst afford a high H-production rate (45.2 and 422.2 times larger than those of ZnCdS and CdS), providing an effective way for the development of high performance nanoporous photocatalysts.

Hydrothermally grown CdS nanoparticles for photodegradation of anionic azo dyes under UV-visible light irradiation

“…In general, two emissions comprising excitonic and trapped photoluminescence are observed from semiconductor nanomaterials. 21,31 In theory, the excitonic emission is sharp and found close to the absorption edge, while the trapped emission is broad and found at a longer wavelength. In this study the as-synthesized CdS showed the PL emission spectrum over the range of 540-660 nm.…”

“…15,35 In contrast, it has been reported that the degradation of RR141 can be achieved by using CdS photocatalyst under visible light irradiation. 21 However, it does take longer time, i.e., about 240 min to reach 95% degradation.…”

“…The photocatalytic stability of CdS photocatalyst was also investigated by repeating the azo dye photodegradation experiment ve times. 15,21 Then the CdS solid was washed with water and then dried in oven. The photocatalytic azo dye degradation activity remained almost constant over 5 cycles as shown in Fig.…”

“…16,17 A number of methods have been used to synthesize the CdS nanomaterials such as solvothermal and hydrothermal routes, 18 chemical precipitation technique, 19 a microwave-assisted heating method 20 and metal-organic framework (MOF)-template technique. 21 Out of these, a hydrothermal method is the most efficient synthetic method for preparation of CdS nanostructures. This is due to its simplicity, controllability and low cost.…”

Metal‐Organic Frameworks for Hydrogen Energy Applications: Advances and Challenges

“…Apart from the above mentioned examples there are other MOF derivatives explored for photocatalytic H 2 production that include Ni 2 P/CdS composite derived from Ni‐BTC (BTC=1,3,5‐benzenetricarboxylic acid) MOF, yolk‐shell CdS microcubes synthesized from Cd−Fe Prussian blue analogues (Cd−Fe‐PBA), porous CdS, MOS 2 @TiO 2 catalyst derived from NH 2 ‐MIL‐125, Pd decorated TiO 2 using NH 2 ‐MIL‐125, ZIF‐8‐derived N‐doped graphene analogous polyhedrons (ZNGs), Co doped Zn‐Cd‐S Nanocrystals,Co 3 O 4 /TiO 2 p‐n heterojunction using Co‐based MOF mesoporous Cu/CuO@TiO 2 nanocomposite using Cu‐MOF and titania supported Cu‐Cu 2 O nanoparticle derived from MOF‐199 ([Cu 3 (BTC) 2 (H 2 O) 3 ] n …”