Synergistic S-Scheme mechanism insights of g-C3N4 and rGO combined ZnO-Ag heterostructure nanocomposite for efficient photocatalytic and anticancer activities

Rational construction of ZnO/CuS heterostructures-modified PVDF nanofiber photocatalysts with enhanced photocatalytic activity

“…Meanwhile, the extremely limited range of its spectral response results in a low visible-light photocatalytic activity. 10–15…”

“…Meanwhile, the extremely limited range of its spectral response results in a low visible-light photocatalytic activity. [10][11][12][13][14][15] In order to improve the utilization efficiency of solar energy, doping or compositing ZnO with metal, non-metal and other semiconductors are the effective ways to improve the visiblelight photocatalytic activity. [16][17][18][19][20][21][22][23][24][25][26] CuS is a typical narrow bandgap (1.2-2.0 eV) p-type semiconductor material preferred among visible light photocatalysts due to its low toxicity, simple preparation, and excellent physical and chemical stability.…”

Dual S-scheme ZnO–g-C3N4–CuO heterosystem: a potential photocatalyst for H2 evolution and wastewater treatment

“…67 The photoinduced e CB − at GCN can efficiently react with O 2 and produces O 2 ˙, whereas the h VB + at CuO and ZnO has adequate oxidative potential to oxidize OH − to produce ˙OH. 68 In addition, significant quenching in the recombination rate of photocarriers confirmed by PL, EIS, and photocurrent analyses might be assigned to the construction of the dual S-scheme mode on Zn–GCN–Cu because such a prolonged separation of photocarriers can result from the S-scheme. As mentioned earlier, owing to the S-scheme charge transfer mode, a negative charge layer originates in ZnO and CuO compared to the counter surface charge layer in GCN, which consequently produced an IEF to push the photoinduced e CB − at ZnO and CuO to recombine with the h VB + at GCN to support the S-scheme charge transfer mode.…”

Review and Perspective on Rational Design and Interface Engineering of g-C3N4/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

“…The carbon materials such as GO, RGO, CNTs, graphene aerogels, carbon xerogel, and CDs exhibit various functional properties that can benefit the photocatalytic reactions. ,,,,,− Like GCN, GOs also serve as excellent substrates for the growth of ZnO and inhibit their growth during the crystallization step . The GO can trap the excited electrons from the CB of ZnO and GCN, thereby preventing electron–hole recombination.…”