Compositionally engineered Cd–Mo–Se alloyed QDs toward photocatalytic H₂O₂ production and Cr(vi) reduction with a detailed mechanism and influencing parameters

Abstract

Photocatalytic H2O2 production and Cr(vi) reduction using Cd–Mo–Se alloyed QDs.

Snowflake-like Cu-BDC-NH2/Cu58S32 Binary Nanohybrid for H2 Evolution and O2 Reduction

“…The O 2 reduction reaction (ORR) was carried out by dispersing 40 mg of photocatalyst in 50 mL of solution containing 10 vol % isopropanol as a sacrificial agent as well as a proton source. The amount of H 2 O 2 produced was determined by using a literature-reported spectroscopic method . The detailed experimental procedure of the photocatalytic study is elaborately explained in the Supporting Information file.…”

“…The amount of H 2 O 2 produced was determined by using a literature-reported spectroscopic method. 13 The detailed experimental procedure of the photocatalytic study is elaborately explained in the Supporting Information file. 244), (604̅ ), (62̅ 4̅ ) and (800) crystallographic planes of roxbyite Cu 58 S 32 phase with triclinic crystal system (PDF# 00-064-0278) (Figure 1a).…”

“…Because of its high water solubility and energy density, H 2 O 2 is implemented as a promising energy carrier for fuel cells. , Till date, approximately 95% of global H 2 O 2 demand is fulfilled by the traditional anthraquinone oxidation method, which produces noxious byproducts and requires high temperatures and large quantities of organic solvents for manufacturing. In addition, the direct production of H 2 O 2 by electrocatalytic O 2 reduction using Pd or Au/Pd alloy involves high operational costs, energy consumption, and poor selectivity. , As an alternative route, photocatalytic oxygen reduction reaction (ORR) is considered as a green, nonhazardous, and low energy-consuming method for H 2 O 2 production.…”

“…In addition, the direct production of H 2 O 2 by electrocatalytic O 2 reduction using Pd or Au/Pd alloy involves high operational costs, energy consumption, and poor selectivity. 13,14 As an alternative route, photocatalytic oxygen reduction reaction (ORR) is considered as a green, nonhazardous, and low energy-consuming method for H 2 O 2 production.…”

Facile fabrication of B-rGO/ZnFe2O4 p–n heterojunction-based S-scheme exciton engineering for photocatalytic Cr(vi) reduction: kinetics, influencing parameters and detailed mechanism

“…Patnaik et al has designed a Au-Pd-g-C 3 N 4 composite for Cr(VI) reduction and found that the fabricated material achieved 56% of Cr(VI) reduction under visible light irradiation for 2 h. 12 Similarly, Sahu et al synthesized Cd-Mo-Se alloyed quantum dots for Cr(VI) reduction, which displayed 93.6% reduction in 2 h of irradiation. 13 Das and his team members fabricated ZnFe 2 O 4 -Al 2 O 3 -MCM-41 by a wet-impregnation method for photocatalytic Cr(VI) reduction and exhibited 66% reduction in 60 minutes of sunlight irradiation. 14 Encouragingly, semiconductor-based photocatalysis is the most promising and sustainable technology developed so far, which has the ability to solve all these problems.…”