Enhanced visible-light activities for PEC water reduction of CuO nanoplates by coupling with anatase TiO2 and mechanism

Li, Zhijun; Qu, Yang; He, Guannan; Humayun, Muhammad; Chen, Shuangying; Jing, Liqiang

doi:10.1016/j.apsusc.2015.05.190

Cited by 27 publications

(13 citation statements)

References 25 publications

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“…This is particularly tunable for co-catalytic systems where one-dimensional and two-dimensional structured materials have a geometric dependency. Copper oxide and zinc oxide core-shell nano wires [100], Cu 2 O/CuO heterojunction decorated with nickel [101], three dimensional branched cobalt-doped α-Fe 2 O 3 nanorod/MgFe 2 O 4 heterojunction [102], CuO nanoplates coupled with anatase TiO 2 [103] are examples of geometrically active co-catalytic systems. For the synthesis of inorganic photocatalysts, pH along with hydrothermal temperature, treatment time, and solvent ratio control the morphology [104,105,106,107,108,109].…”

Section: Photocatalytic Conditionmentioning

confidence: 99%

Photocatalytic Water Splitting—The Untamed Dream: A Review of Recent Advances

et al. 2016

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Photocatalytic water splitting using sunlight is a promising technology capable of providing high energy yield without pollutant byproducts. Herein, we review various aspects of this technology including chemical reactions, physiochemical conditions and photocatalyst types such as metal oxides, sulfides, nitrides, nanocomposites, and doped materials followed by recent advances in computational modeling of photoactive materials. As the best-known catalyst for photocatalytic hydrogen and oxygen evolution, TiO 2 is discussed in a separate section, along with its challenges such as the wide band gap, large overpotential for hydrogen evolution, and rapid recombination of produced electron-hole pairs. Various approaches are addressed to overcome these shortcomings, such as doping with different elements, heterojunction catalysts, noble metal deposition, and surface modification. Development of a photocatalytic corrosion resistant, visible light absorbing, defect-tuned material with small particle size is the key to complete the sunlight to hydrogen cycle efficiently. Computational studies have opened new avenues to understand and predict the electronic density of states and band structure of advanced materials and could pave the way for the rational design of efficient photocatalysts for water splitting. Future directions are focused on developing innovative junction architectures, novel synthesis methods and optimizing the existing active materials to enhance charge transfer, visible light absorption, reducing the gas evolution overpotential and maintaining chemical and physical stability.

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Section: Photocatalytic Conditionmentioning

confidence: 99%

Photocatalytic Water Splitting—The Untamed Dream: A Review of Recent Advances

et al. 2016

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“…Doping with copper appears to be a particularly promising approach for photocatalytic applications [18]. For example, it has been found that the incorporation of Cu 2+ ions into a TiO 2 matrix can substitute for Ti 4+ and/or segregate to the surface of TiO 2 crystallites in the form of CuO, Cu 2 O or metallic Cu [14,[29][30][31][32] and improve significantly the photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Radiocatalytic Cu-incorporated TiO2 nano-particles for the degradation of organic species under gamma irradiation

Samet

March

Stéphan

et al. 2018

Journal of Alloys and Compounds

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We report on an experimental study aimed at optimizing the radiocatalytic properties of pure and copper-incorporated TiO 2 powders. This has been achieved by conducting crosschecked structural, optical and radiocatalytic studies. Structural and nanoscale analyses show evidence of internal doping by Cu 2+ in the TiO 2 lattice that leads to the reduction of the optical band gap down to 1.5 eV. The effect of gamma radiation on the radiocatalytic activity of these catalysts was studied by degradation of methylene blue as a model pollutant. It was found that the addition of Cu-doped TiO 2 (anatase) powders improves significantly the pollutant degradation, as compared to photocatalysis. The doping and the annealing temperature's impact on the structural, optical and radiocatalytic efficiencies are highlighted and correlated.

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“…[1][2][3][4][5] It is known that couple noble metal with TiO 2 can greatly enhance the overall photocatalytic activity. Especially heterostructures with metal *Manuscript Click here to view linked References A c c e p t e d M a n u s c r i p t core and TiO 2 shell not only have controllable chemical and colloidal stability within the shell but also charge effectively transfer between noble metal cores and TiO 2 .…”

Section: Introductionmentioning

confidence: 99%