Details

Autor(en) / Beteiligte

• Ma, Xiumin
• Jiang, Quantong
• Guo, Weimin
• Zheng, Meng
• Xu, Weichen
• Ma, Fubin
• Hou, Baorong

Titel

Fabrication of g-C 3 N 4 /Au/CdZnS Z-scheme photocatalyst to enhance photocatalysis performance

Ist Teil von

• RSC advances, 2016, Vol.6 (34), p.28263-28269

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this study, a sandwich-structured C 3 N 4 /Au/CdZnS photocatalyst with Au nanoparticles sandwiched between C 3 N 4 and CdZnS was fabricated. The results showed that there was a 6.3 mmol g −1 increase of hydrogen production for C 3 N 4 /Au/CdZnS photocatalyst compared to C 3 N 4 /CdZnS in 4 h. The photoinduced I – t curve, electrochemical impedance spectrum (EIS), photogenerated electron lifetime and photoluminescence spectra showed that the photocatalytic ability of the composite was enhanced by anchoring Au as the electron transfer mediator between C 3 N 4 and CdZnS through the Z-scheme charge-carrier transfer mechanism. Au functioned as an electron transition mediator, which could induce a combination between photogenerated electrons and holes in the CdZnS and C 3 N 4 , respectively. These photogenerated holes of CdZnS can be involved in the S 2− /SO 3 2− oxidation process and the electrons from the C 3 N 4 surface might be involved in the water to hydrogen reduction reaction, thus enhancing the photocatalysis performance of C 3 N 4 /Au/CdZnS photocatalyst.