Siloxene: An advanced metal-free catalyst for efficient photocatalytic reduction of aqueous Cr(VI) under visible light

Self-Regulating Solar Steam Generators Enable Volatile Organic Compound Removal through In Situ H2O2 Generation

“…Taking into consideration the phenomenon that the presence of O 2 affects the H 2 O 2 generation greatly, we can propose that reduction of O 2 by electrons may play important role for the production of H 2 O 2 . Additionally, the presence of K 2 Cr 2 O 7 (a typical e – scavenger, with a reaction kinetic constant ∼0.635 min –1 for e – ) also resulted in a slightly higher H 2 O 2 production rate than that of the original system. This phenomenon indicated that the oxidation of H 2 O via holes also contribute to the formation of H 2 O 2 , and the consumption of e – in the solution can contribute to more released holes for the reaction.…”

Synergistic Cr(VI) Reduction and Chloramphenicol Degradation by the Visible-Light-Induced Photocatalysis of CuInS2: Performance and Reaction Mechanism

“…A set of tests were performed to investigate the photocatalytic Cr(VI) reduction and CAP degradation over CuInS 2 at various solution pHs and Cr(VI)/CAP ratios. Cr(VI) concentration was determined by the modified N, N-diphenylcarbazide spectrophotometry method ( Li et al, 2021 ). The concentration of CAP in the solution was determined using high-resolution liquid chromatography (HPLC, Accela, Thermo Scientific, United States) equipped with an XB-C18 column (4.6250 mm, 5 m, Yuexu, China) and a UV detector.…”

High surface area siloxene for photothermal and electrochemical catalysis

“…10,11 These unique features have led to the development of relatively effective catalysts for various heterogeneous reactions exemplified by the CO 2 reduction reaction, hydrogen evolution reaction, nitrogen oxide removal, dry reforming reaction, heavy metal ion removal, etc. [9][10][11][12][13][14][15][16] However, despite various synthetic protocols having been explored, [17][18][19] the surface area of 2D Silicon that can easily aggregate is still a major limiting factor for its catalytic performance. As one of the very few cases that investigated the influence of surface area on catalytic activity, Li and co-workers found the optimum reaction duration of HCl exfoliation for the highest photocatalytic reduction of Cr 3+ , but the highest surface area achieved was still below 50 m 2 g −1 .…”

“…As one of the very few cases that investigated the influence of surface area on catalytic activity, Li and co-workers found the optimum reaction duration of HCl exfoliation for the highest photocatalytic reduction of Cr 3+ , but the highest surface area achieved was still below 50 m 2 g −1 . 14 Qian and co-workers successfully deposited Pd nanoparticles onto 2DSi nanosheets through reductive Si-H bonds and demonstrated catalytic activity for the photothermal CO 2 reduction, but the stabilized activity was only around 10 μmol g −1 h −1 . 7 Yan and co-workers discovered that impregnating Ni between the siloxene nanosheets could direct the selectivity of CO 2 methanation, but at the cost of the total CO 2 conversion due to the significant loss of exposed active sites and thereby the loss of production of CO. 10 In this context, the 2DSi stacked structures still need further improvement in the surface area, and thereby the catalytic activity.…”