Synthesis and Photocatalytic Properties of Manganese-Substituted Layered Perovskite-like Titanates A′2La2MnxTi3−xO10 (A′ = Na, H)

Solids, Journal Year: 2025, Volume and Issue: 6(2), P. 23 - 23

Published: May 12, 2025

The search for effective and reliable methods of photosensitization oxide-based semiconductor materials is great significance their use in photocatalytic reactions hydrogen production environmental remediation under natural sunlight. present study focused on partial substitution titanium with manganese the structure layered perovskite-like titanate Na2La2Ti3O10, which was employed to yield a series photocatalytically active materials, Na2La2MnxTi3−xO10 (x = 0.002–1.0), as well protonated forms H2La2MnxTi3−xO10 nanosheets. It established that cations Mn4+ are embedded middle sublayer oxygen octahedra perovskite slabs La2MnxTi3−xO102− maximum achievable content x products ≈0.9. cationic sublattice led pronounced contraction optical band gap from 3.20 1.35 eV (depending x) and, therefore, allowed corresponding photocatalysts utilize not only ultraviolet, but also visible near-infrared light wavelengths up ≈920 nm. obtained were tested evolution aqueous methanol, greatest activity this reaction demonstrated by samples low contents 0.002–0.01). However, greater degrees may be high interest other processes especially, thermophotocatalysis due improved ability absorb part solar radiation.

Language: Английский

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Enhancing Photocatalytic Hydrogen Evolution through Electronic Structure and Wettability Adjustment of ZnIn₂S₄/Bi₂O₃ S-Scheme Heterojunction

Acta Physico-Chimica Sinica, Journal Year: 2023, Volume and Issue: 0(0), P. 2308036 - 2308036

Published: Jan. 1, 2023

Abstract: The production of renewable fuels through water splitting via photocatalytic hydrogen holds significant promise. Nonetheless, the sluggish kinetics evolution and inadequate adsorption on photocatalysts present notable challenges. In this study, we have devised a straightforward hydrothermal method to synthesize Bi2O3 (BO) derived from metal-organic frameworks (MOFs), loaded with flower-like ZnIn2S4 (ZIS). This approach substantially enhances surface catalytic reactions, resulting in remarkable enhancement activity. By employing triethanolamine (TEOA) as sacrificial agent, rate achieved 15 wt% (mass fraction) ZIS loading BO reached an impressive value 1610 μmol∙h−1∙g−1, marking 6.34-fold increase compared that observed for bare BO. Furthermore, Density Functional Theory (DFT) Ab Initio Molecular Dynamics (AIMD) calculations, identified reactions occurring at ZIS/BO S-scheme heterojunction interface, including identification active sites reactions. study provides valuable insights into development high-performance composite materials tailored electronic properties wettability.

Language: Английский

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Constructing a Titanium Silicon Molecular Sieve-Based Z-Scheme Heterojunction with Enhanced Photocatalytic Activity

Langmuir, Journal Year: 2024, Volume and Issue: 40(12), P. 6198 - 6211

Published: March 12, 2024

Titanium silicon molecular sieve (TS-1) is an oxidation catalyst that possesses a long lifetime of charge transfer excited state, high Ti utilization efficiency, large specific surface area, and good adsorption property; therefore, TS-1 acts as Ti-based photocatalyst candidate. In this work, coupled Bi

Language: Английский

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Zirconium induced surfaces frustrated Lewis acid-base pairs for BiOBr boosting CO2 photoreduction

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 992, P. 174595 - 174595

Published: April 23, 2024

Language: Английский

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Solar Light-Induced Photocatalytic Response of BiOCl/PANI Composite towards the Degradation of Tetracycline

Catalysts, Journal Year: 2023, Volume and Issue: 13(5), P. 795 - 795

Published: April 24, 2023

Photocatalytic degradation has gained much attention as a means of reducing water contamination as, with increasing industrialization and population growth, pollution is menace to both individuals the environment. In this respect, metal oxide photocatalysts demonstrate effectiveness due their excellent properties, such narrow band gap low recombination rate charge carriers. Here, various weight ratios BiOCl/PANI composites have been synthesized by simple wet chemical method. The crystallinity, oxidation state surface composition elements were analyzed XRD XPS techniques. FESEM HRTEM images verified formation BiOCl nanosheets, covered well PANI nanofibers, while EDX spectra revealed uniform distribution elements. high area photocatalyst mesoporous nature was BET analysis. Low gap, suitable for photocatalysis, confirmed PL UV–DRS spectroscopy. photocatalytic performance tested photodegradation rhodamine-B (Rh-B) tetracycline (TC) under natural sunlight irradiation. Kinetic results demonstrated that 15% hybrid exhibits activity, degrading 97% Rh-B 77% TC constant (for 0.0236 min−1 0.0106 min−1). Trapping experiments highlighted O2•− radicals play vital role in mechanism. reusability studies good stability catalyst (~85%) after five sequential runs. Considering its superior properties ease preparation, can be used ecological remediation.

Language: Английский

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Synergistically promoted photoelectrocatalytic activity and photostability in CdS photoanode by ultrathin polydopamine layer-induced hole transport

Science and Technology for Energy Transition, Journal Year: 2024, Volume and Issue: 79, P. 78 - 78

Published: Jan. 1, 2024

CdS-based photocatalyst and photoanode have recently drawn the attention of several investigators primarily in connection with its excellent visible light response various catalytic reactions involving light, especially photoelectrochemical (PEC) water splitting. The present approach highlights concept constructing a biological functional layer incorporated for photochemical instable semiconductors practical PEC applications. However, applications photoanodes are limited by rapid charge recombination severe photo corrosion. This study introduces novel to enhance reaction kinetics stability. We CdS nanorod an ultrathin polydopamine (PDA), prepared through conformal polymerization assembly process, which serves as robust platform subsequent hole cocatalysts FeOOH. resulting sandwich structure CdS/PDA/FeOOH demonstrates incident current efficiency (IPCE) 7.1% at 420 nm photocurrent 1.9 mA/cm 2 1.23 V versus reversible hydrogen potential (RHE). integrated exhibits significantly prolonged photostability compared CdS, CdS/PDA, CdS/FeOOH photoanodes. significance this work lies FeOOH (with extraction consumption capabilities) on outermost using easy-to-operate preparation thereby revealing ability PDA enable passage photogenerated holes. integrating biologically layers stabilize photochemically unstable

Language: Английский

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Synthesis of CC/BiPO<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> Composite Material and Its Photocatalytic Performance

Optics and Photonics Journal, Journal Year: 2023, Volume and Issue: 13(06), P. 156 - 166

Published: Jan. 1, 2023

Along with the popularity of environmental protection concepts, treatment water pollution attracts widespread attention, among which, research on Bi-based semiconductor photocatalytic degradation technology has made great progress. However, development such bismuth-based composites still remains a challenging task due to difficult recovery and low catalytic efficiency. Herein, novel CC/BiPO4/Bi2WO6 composite was successfully synthesized through two-step hydrothermal method using activated flexible carbon cloth as substrate. The results experiments showed that obtained can degrade 92.1% RhB in 60 min under UV-visible light irradiation, which much higher than unloaded BiPO4 (24.4%) BiPO4/Bi2WO6 (52.9%), exhibiting better adsorption-photocatalytic performance BiPO4/Bi2WO6. Photoluminescence spectra indicated improved activity more effective inhibition photogenerated carrier complexation. Furthermore, radical capture confirmed h+, ·OH O2- were main active substances process by composites. More importantly, prepared had simple separation good recycling stability, its efficiency reach 53.3% after six cycles degradation.

Language: Английский

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Single atom photocatalytic micropollutants degradation performance: A review

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: 320, P. 100656 - 100656

Published: July 30, 2024

A single-atom catalyst is a supported material in which the active phase presented as isolated atoms. Single atom photocatalytic degradation of micropollutants has garnered significant attention recent research. However, updated their performance still limited. This review paper presents key aspects related to use SACs micropollutant degradation: The influencing factors like structure, surface area, density, relative humidity, temperature airflow, light intensity and reactants concentrations are also discussed. Further synthesis methods including atomic deposition, ball milling, trapping, pyrolysis, two steps doping, wet impregnation, facile electrostatic adoption updated. Characterization techniques STEM, TEM, FTIR, XAS, XRD, XPS, DFT evaluated relation quality with an emphasis on performances destruction well applications. catalysts endowed uniform, definite metal centers tunable matching options, give them excellent vigor special selectivity for defined In addition, mechanism harvesting, charge transfer separation, applications single micropollutants, photocatalysts support combinations other materials technologies challenges stability recyclability, loading, nature carrier, structure future perspective Finally highlighted conclusion remarks keynote areas.

Language: Английский

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