Highly efficient photocatalytic H2 evolution over NiCo2S4/Mn0.5Cd0.5S: Bulk twinned homojunctions and interfacial heterojunctions

Cd0.5Zn0.5S/CoWO4 Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO2 Reduction

“…To suppress the reintegration of photogenerated electrons/ holes over CZS, Liu et al 20 prepared the twin crystal CZS homojunction and proved that a type-II heterojunction with the zinc-blende phase and wurtzite phase was formed, which accelerated the detachment of the photogenerated carriers of CZS and enhanced its photocatalytic performance. 21 In addition, photocatalytic CO 2 reduction is a complex multielectron reaction, which requires high energy to activate CO 2 . Therefore, semiconductors are required to have a conduction band edge with negative enough potential.…”

Amorphous CoSx decorated Cd0.5Zn0.5S with a bulk-twinned homojunction for efficient photocatalytic hydrogen evolution

“…S1IJa-c), † suggesting that twinned structures are ubiquitous. 23 As shown in Fig. S1(d and e), † the pristine T-CZS and CoS x both showed similar appearance, therefore, it is difficult to distinguish CoS x from T-CZS nanoparticles in Fig.…”

“…5a, T-CZS prepared at pH = 10 shows the highest H 2 evolution rate of 13.0 mmol h −1 g −1 due to the appropriate solution environment. 23 A control solution of pH = 10 was used in the following tests. The H 2 evolution rates of different crystal architectures of CZS were investigated, as shown in Fig.…”

“…The construction of heterojunctions is an effective method to improve the surface charge separation, but it has little effect on bulk phase charge separation. [20][21][22][23] It has been reported that the CZS solid solution with nanohomojunction can be prepared by one-pot hydrothermal method, in which the homojunction formed between ZB-CZS and WZ-CZS can efficiently suppress the bulk phase charge recombination due to the slight energy level difference between ZB and WZ phases of CZS, leading to higher performance than ZB-CZS and WZ-CZS alone. [24][25][26] Liu et al first reported that the CZS homojunction can suppress random scattering of electrons and holes in the bulk semiconductors, its sluggish surface H 2 production kinetics still need to be improved by promoting the surface charge to participate in the chemical reaction quickly.…”

Manganese Cadmium Sulfide Nanoparticles Solid Solution on Cobalt Acid Nickel Nanoflakes: A Robust Photocatalyst for Hydrogen Evolution

“…Cao et al modified Mn 0.05 Cd 0.95 S by amorphous NiCoB and got a photocatalytic H 2 evolution rate of 10460 μmol g À 1 h À 1 which was 7.5 times that of Mn 0.05 Cd 0.95 S. [14] Liu and co-workers prepared Mn x Cd 1-x S homojunction loading with NiCo 2 S 4 cocatalyst, where the photocatalytic H 2 evolution rates of the NiCo 2 S 4 / Mn 0.5 Cd 0.5 S composite and Mn 0.5 Cd 0.5 S homojunction were 127.3 mmol g À 1 h À 1 and 61.4 mmol g À 1 h À 1 , respectively. [15] Based on the above, the photocatalytic H 2 evolution rate of the modified Mn x Cd 1-x S solid solution has been a significant enhancement, but there is still much progress to be made. Actually, NiCo 2 O 4 is widely applied in electrocatalysis and is rarely used as a photocatalyst, but after some of its properties are explored, it gradually comes into researchers' view.…”