Synergy of nitrogen vacancies and partially broken hydrogen bonds in graphitic carbon nitride for superior photocatalytic hydrogen evolution under visible light

Abstract

Hydrogen-bond engineering and nitrogen vacancies have been proposed separately to significantly tune the photoactivities of g-C3N4. Nevertheless, the intrinsic relationships between hydrogen-bond, nitrogen vacancies and photo-performance are still unclear. Herein,...

Manipulation of Sulfur Vacancies and Dislocations in Mn0.3Cd0.7S Nanorods with Modification of Co2P toward Photocatalytic H2 Evolution

“…Correspondingly, the E VB of Mn 0.3 Cd 0.7 S and Co 2 P was þ1.22 and þ0.14 eV, respectively. Their E CB satisfies the water reduction potential [49,50] As shown in Figure S7, Supporting Information, for Mn 0.3 Cd 0.7 S and 7.5Co 2 P/Mn 0.3 Cd 0.7 S, no EPR signal of O 2•À was probed in the dark. However, the obvious EPR peaks appeared after illumination 10 min, which were related to the classic signal of spin adduct 5, 5-dimethyl-l-pyrroline N-oxide (DMPO)-•O 2À (O 2 /•O 2À ¼ À0.33 eV vs. NHE).…”

Enhanced photocatalytic H2 generation of CdS using dual-cocatalysts: effect of the coordination–reduction method

“…S5 †) of the fresh and used catalysts suggests that they kept their crystalline structure after the cycle test, which is consistent with the result of previous research. 44…”

“…When no cocatalysts existed in CdS, the electron-hole pairs could rapidly recombine. 44 After introduction of Ni, a Ni-NiS/CdS catalyst system is well formed. In this work, metallic Ni acts as an electron extracting agent with the function of capturing and collecting photogenerated electrons from the CB of CdS.…”

Enhanced photoelectrochemical performance of NiS-modified TiO2 nanorods with a surface charge accumulation facet

“…S4 †), which could be attributed to the photocorrosion of the sulfide under light conditions. 56 To further investigate the photoelectrochemical effect of the NiS nanoparticles deposited on bare TiO 2 NRs, the transient photoresponse of all samples was tested at an operating voltage of 0.6 V vs. Ag/AgCl as shown in Fig. 7a.…”