AgPO microcrystals with complex polyhedral morphologies diversity obtained by microwave-hydrothermal synthesis for MB degradation under sunlight

Prominent roles of Ni(OH)2 deposited on ZnIn2S4 microspheres in efficient charge separation and photocatalytic H2 evolution

“…To understand the mechanism of the enhanced photocatalytic H 2 evolution over Ni(OH) 2 /ZnIn 2 S 4 , the role of the deposited 7a, aer the photo-deposition of Au on the composite, several dark gray nanoparticles clearly appear on the surface of the crystalline ZnIn 2 S 4 only. 7,8 A HRTEM (Fig. 7b) analysis further indicates that the lattice fringe of 0.23 nm in a dark gray nanoparticle matches the crystallographic plane (111) of metallic cubic-phase Au.…”

“…2e and f) of 6% Ni(OH) 2 /ZnIn 2 S 4 composite reveals that the crystalline Ni(OH) 2 are well deposited onto the surface of well-crystalline ZnIn 2 S 4 to form heterostructures with the intimate interfaces. 7,8 The lattice fringes with the spacing of ca. 0.32 nm and 0.27 nm well correspond to the crystallographic plane (102) of hexagonal ZnIn 2 S 4 and the crystallographic plane (100) of hexagonal Ni(OH) 2 , respectively.…”

“…[4][5][6] Unfortunately, the direct application of these semiconductors themselves for photocatalytic H 2 production is almost infeasible mainly due to their rapid charge recombination. [7][8][9] For an efficient photocatalytic H 2 production reaction, it is indispensable to load a noble metal such as Pt, Pd, Ag, or Au as a cocatalyst on the host semiconductors. [10][11][12][13] The noble metals as cocatalysts can not only facilitate the separation of electron-hole pairs over host semiconductor effectively, but also function as active sites for H 2 production.…”

Improvement of the Photocatalytic Activity of ZnO/Burkeite Heterostructure Prepared by Combustion Method

“…As we mentioned above, the highest photocatalytic activity was achieved by a pH of 11 for which the 92.4% of degradation of Rhodamine B is obtained, approximately 30% more than ZnO photocatalyst. This counterintuitive behavior is well known from recent studies using another type of semiconductor material [34][35][36] and semiconductor heterostructure-based powders [37,38] where it was observed that a low surface adsorption area has a high photocatalytic activity for the Rhodamine B degradation. The origin of the high photocatalytic activity is derived from semiconductor materials that exhibit the physical property known as the photoelectric effect.…”

Microwave-Assisted Synthesis of Chalcopyrite/Silver Phosphate Composites with Enhanced Degradation of Rhodamine B under Photo-Fenton Process

“…However, its absorption and photocatalytic activity depends entirely on ultraviolet light, which restricts its application in large-scale wastewater treatment [11][12][13]. Studies have been attempting to identify efficient sunlight-responsive photocatalysts, and Ag 3 PO 4, with a quantum efficiency of >90%, is considered an excellent candidate that is sunlight responsive [14][15][16]. However, it experiences considerable photocorrosion during photolysis.…”