Surface plasmon resonance effect of Ag@BiOCl and its enhanced visible light-photodegradation of acid red B

Abstract

Using AgNO 3 as the Ag source, the Ag@BiOCl photocatalyst was prepared by depositing noble metal Ag on the surface of BiOCl by solvothermal method. Ag exists as spherical particles with a diameter of 40 nm. Based on the surface plasmon resonance effect (SPR) of Ag, the photoresponse range of BiOCl was successfully extended to the visible light region, which reduced the photo-generated electron-hole recombination e ciency and improved the charge transfer e ciency. The photocatalytic performance of Ag@BiOCl was studied under visible light. The results show that when the Ag content is 10wt%, it exhibits excellent effects on the degradation of acid red B (ARB), and its degradation rate constant is 11 times larger than that of BiOCl. The active substance-capturing test results show that the main role in photocatalytic degradation of ARB is voids.

Atomic Interface Engineering of Single‐Atom Pt/TiO2‐Ti3C2 for Boosting Photocatalytic CO2 Reduction

“…Particularly, Pt‐SA/TT exhibited the highest photocatalytic activity of 20.5 µmol g −1 h −1 with a high selectivity of 96%, which was attributed to the synergistic effect of atomic interface engineering of single‐atom Pt and interfacial TiOTi for effective charge separation. The high CO selectivity could be ascribed to the thermodynamically favored adsorption of CO 2 and the desorption of *CO. [ 45,46 ] Moreover, the photocatalytic performance of Pt‐SA/TT for CO 2 reduction is higher than or comparable to that of the recently reported TiO 2 ‐based photocatalysts (Table S4, Supporting Information). In comparison, when Pt nanoparticles were loaded, the photocatalytic performance decreased due to the poisoning of Pt by carbon monoxide or the strong adsorption of intermediates, further revealing the critical role of atomically dispersed Pt in promoting the CO 2 reduction reaction.…”

Symmetry Breaking Induced Amorphization of Cobalt‐Based Catalyst for Boosted CO2 Photoreduction

“…electrochemical impedance spectroscopy (EIS) tests show a minimum semicircle in Nyquist plots for the CoSeO‐ANS (Figure 4D), indicative of its low charge transfer resistance for promoting separation and transport of photoinduced charges. [ 45,46 ] In addition, the CoSeO‐ANS shows stronger •OH and •O 2 − signals in the 5,5‐dimethyl‐1‐pyrroline N‐oxide (DMPO) spin‐trapping ESR analysis, suggestive of stronger redox capacity than its crystalline counterpart (Figure S24, Supporting Information).…”

Construction of type II ZnBi2O4/g-C3N4 heterojunction photocatalysts for efficient degradation of acid red B

“…The absorption peak at λ = 326 nm in the ultraviolet region is the characteristic absorption peak of the naphthalene ring, and the absorption at 516 nm is caused by the π → π* transition of the –NN– bond. 53 In addition, with the extension of the photocatalytic reaction time, the two characteristic absorption peaks at 326 nm and 516 nm gradually weakened, indicating that the naphthalene ring or other unsaturated conjugated systems were destroyed, and the color of the acid red B solution was close to colorless.…”

“…The absorption peak at l = 326 nm in the ultraviolet region is the characteristic absorption peak of the naphthalene ring, and the absorption at 516 nm is caused by the pp* transition of the -NQN-bond. 53 In addition, with the extension of the photocatalytic reaction time, the two characteristic absorption peaks at 326 nm and 516 nm gradually weakened, indicating that the naphthalene ring or other unsaturated conjugated systems were destroyed, and the color of the acid red B solution was close to colorless. The process of photocatalytic degradation of acid red B solution by ZBN composites was further analyzed, and the changes of chemical oxygen demand (COD) of acid red B solution during the degradation process were measured by using the ''Determination of Chemical Oxygen Demand of Water Quality by Rapid Elimination Spectrophotometry'' (HJ/ T399-2007), and the results are shown in Fig.…”