PbSe quantum dots (QDs) were formed on TiO2 by a two-step photodeposition technique. At the first step, UV-light irradiation of TiO2 in an ethanol solution of H2SeO3 yields Se QDs on the TiO2 surface in a highly dispersed state (Se/TiO2). At the second step, UV-light irradiation of Se/TiO2 in an ethanol solution of Pb(ClO4)2 transforms Se QDs into several tens of nanometer-sized cubic deposits identified as PbSe (PbSe/TiO2) by X-ray diffraction, electronic absorption measurements and X-ray photoelectron spectroscopy. Photochronopotentiometry measurements suggested that the PbSe QDs are formed on TiO2 via the Pb(2+) ion-assisted reduction of Se particles.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcis.2015.03.008 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Surface Modifications of Layered Perovskite Oxysulfide Photocatalyst YTiOS to Enhance Visible-Light-Driven Water Splitting.
Adv Sci (Weinh)
November 2024
Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 4-17-1 Wakasato, Nagano-shi, Nagano, 380-8553, Japan.
Increasing the efficiency of visible-light-driven water splitting systems will require improvements in the charge separation characteristics and redox reaction kinetics associated with narrow-bandgap photocatalysts. Although the traditional approach of loading a single cocatalyst on selective facets provides reaction sites and reduces the reaction overpotential, pronounced surface charge carrier recombination still results in limited efficiency increases. The present study demonstrates a significant improvement in the hydrogen evolution activity of the layered single-crystal photocatalyst YTiOS.
View Article and Find Full Text PDFConstruction of Au quantum dots/nitrogen-defect-enriched graphite carbon nitride heterostructure via photo-deposition towards enhanced nitric oxide photooxidation.
J Colloid Interface Sci
September 2024
Unité de Catalyse et Chimie du Solide, UMR CNRS 8181, Université de Lille, F-59000 Lille, France. Electronic address:
The challenge of mitigating pollution stemming from industrial exhaust emissions is a pressing issue in both academia and industry. This study presents the successful synthesis of nitrogen-defect-enriched graphite carbon nitride (g-CN) using a two-step calcination technique. Furthermore, a g-CN-Au heterostructure was fabricated through the photo-deposited Au quantum dots (QDs).
View Article and Find Full Text PDFPoly Meta-Aminophenol (PmAP) as a Solid-State Electron Mediator in the Z-Scheme, AgPO/CoFeO Heterojunction: Mineralization of Highly Concentrated Bisphenol-A and Reactive Dyes Water Pollutants.
ACS Omega
May 2024
Department of Chemistry, Utkal University, Vani Vihar, Odisha 751004, India.
This study demonstrated the effectiveness of poly meta-aminophenol (PmAP) as a solid electron mediator in the Z-scheme photocatalytic system for organic pollutants (viz. bisphenol-A and reactive dyes) mineralization and also illustrated how PmAP transported the photogenerated electrons from an O-emitting photocatalyst (AgPO) to a H-emitting photocatalyst (CoFeO) enabling enhanced photocatalytic activity under visible light irradiation. The PmAP/AgPO-CoFeO (PAC-10), was prepared by a two-step process and characterized by various analytical methods to assess the impact of PmAP on optical, photocatalytic, and electrochemical characteristics of the CoFeO (CFO)/AgPO composite.
View Article and Find Full Text PDFConstruction of Au-modified CN-based donor-acceptor system coupled with dual photothermal effects for efficient photoreduction of carbon dioxide.
J Colloid Interface Sci
June 2024
School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China. Electronic address:
Conversion of CO into high value-added fuels through the photothermal effect is an effective approach for utilizing solar energy. In this study, we prepared the CN-based photocatalyst Py-CTN-Au with both donor-acceptor (D-A) system and dual photothermal effects using a simple two-step method involving calcination and photo-deposition. Real-time monitoring with a thermal imaging camera revealed that Py-CTN-Au0.
View Article and Find Full Text PDFRuthenium and palladium bimetallic nanoparticles achieving functional parity with a rhodium cocatalyst for TiO-photocatalyzed ring hydrogenation of benzoic acid.
Phys Chem Chem Phys
August 2023
Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Kowakae, Higashiosaka, Osaka 577-8502, Japan.
Our previous study showed that a rhodium (Rh) cocatalyst is indispensable for ring hydrogenation of benzoic acid over a titanium(IV) oxide (TiO) photocatalyst. In this study, we explored ring hydrogenation under an Rh-free condition by using two kinds of cocatalyst that were inactive for this reaction when used solely. Cyclohexanecarboxylic acid as the ring hydrogenation product was successfully obtained when ruthenium (Ru) and palladium (Pd) were simultaneously loaded on TiO, indicating that this bimetallic system can be used in place of an Rh cocatalyst in ring hydrogenation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!