Metal oxide heterostructures for efficient photocatalysts
type: Dataset
description: Photocatalytic processes over semiconducting oxide surfaces have attracted worldwide attention aspotentially efficient, environmentally friendly and low cost methods for water/air purification as well as forrenewable hydrogen production. However, some limitations to achieve high photocatalytic efficiencies havebeen found due to the fast recombination of the charge carriers. Development of heterostucture photocatalystsby depositing metals on the surface of semiconductors or by coupling two semiconductors with suitable bandedge position can reduce recombination phenomena by vectorial transfer of charge carriers. To draw newprospects in this domain, three different kinds of heterostructures such as n-type/n-type semiconductor(SnO2/ZnO), metal/n-type semiconductor (RuO2/TiO2 and RuO2/ZnO) and p-type/n-type semiconductor(NiO/TiO2) heterojunction nanomaterials were successfully prepared by solution process. Their composition,texture, structure and morphology were thoroughly characterized by FTIR, X-ray diffraction (XRD), Ramanspectroscopy, transmission electron microscopy (TEM) and N2 sorption measurements. On the other hand, asuitable combination of UV–visible diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy(XPS) and ultraviolet photoemission spectroscopy (UPS) data provided the energy band diagram for eachsystem. The as-prepared heterojunction photocatalysts showed higher photocatalytic efficiency than P25 TiO2for the degradation of organic dyes (i.e. methylene blue and methyl orange) and the production of hydrogen.Particularly, heterostructure RuO2/TiO2 and NiO/TiO2 nanocomposites with optimum loading of RuO2 (5 wt %)and NiO (1 wt %), respectively, yielded the highest photocatalytic activities for the production of hydrogen.These enhanced performances were rationalized in terms of suitable band alignment as evidenced by XPS/UPSmeasurements along with their good textural and structural properties. This concept of semiconductingheterojunction nano…
landing page: https://theses.hal.science/tel-00879226
identifier: NNT: 2013BOR14859
keyword: activite-photocatalytique
keyword: alignement-des-bandes
keyword: chimothechemical-sciencesother
keyword: degradation-de-colorants-organiques
keyword: energy-band-alignment
keyword: heterojunction-nanocatalysts
keyword: hydrogen-production
keyword: infoeu-reposemanticsdoctoralthesis
keyword: nanocatalyseurs-a-heterojonctions
keyword: organic-dye-degradation
keyword: oxydes-metalliques-semiconducteurs
keyword: photocatalytic-activity
keyword: production-dhydrogene
keyword: semiconducting-metal-oxides
keyword: theses
keyword: ups
keyword: xps
issued: 2026-05-09T04:21:56.603746
modified: 2026-05-09T04:21:56.603751
language: en
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Metal oxide heterostructures for efficient photocatalysts
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00879226
issued: 2026-05-09T04:21:56.610764
modified: 2026-05-09T04:21:56.586125