Photocatalytic reduction of CO2 in methanol to methyl formate over CuO–TiO2 composite catalysts

Qin, Shiyue; Feng, Xin; Liu, Yuande; Yin, Xiaohong; Ma, Wei

doi:10.1016/j.jcis.2010.12.034

Cited by 196 publications

(113 citation statements)

References 26 publications

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“…As a result, Cu + may play a negative role as an electron-hole recombination center. Qin et al (2011) demonstrated that it was the heterojunctions between CuO and TiO 2 that contributed to the promotion of the photoactivity. Only one study in the literature (Hirano et al, 1992) indicated that metallic Cu deposited on TiO 2 enhanced the photoefficiency of CO 2 reduction, where Cu metal played the roles as an effective co-catalyst for the reduction of CO 2 and as a reducing species to react with the positive holes simultaneously.…”

Section: Electron Transfer From Tio 2 Cb To Trapping Sitesmentioning

confidence: 99%

“…Second, electron transfer could be promoted in the direction from TiO 2 CB to external trappers or carriers. The electron trappers can be noble metals (e.g., Pt, Pd, Au, Ag) (Sasirekha et al, 2006;Iizuka et al, 2011;Yui et al, 2011;An et al, 2012;Uner and Oymak, 2012;Wang et al, 2012b) or metal oxides (e.g., CuO, FeO x , CeO 2 ) (Tseng et al, 2004;Qin et al, 2011;Srinivas et al, 2011;Wang et al, 2011b;Truong et al, 2012;Zhao et al, 2012b), and the electron carriers are often carbon materials (e.g., graphene) (Liang et al, 2011(Liang et al, , 2012Tu et al, 2012). Third, the incorporation of TiO 2 with another semiconductor, i.e., photo-sensitizer (e.g., AgBr, CdSe, PbS) Asi et al, 2011;Wang et al, 2011a;An et al, 2012) or n-type semiconductor (e.g., ZnO) (Xi et al, 2011), promotes electron transfer between the CB of the second semiconductor and the CB of TiO 2 .…”

Section: Effect Of Materials Modificationmentioning

confidence: 99%

“…Besides ZnO-coupled TiO 2 , other semiconductors such as CuO, Cu 2 O, and FeTiO 3 have been paired with TiO 2 for CO 2 photoreduction (Mor et al, 2008;Roy et al, 2010;Qin et al, 2011;In et al, 2012;Truong et al, 2012). These semiconductors have a narrow band-gap (E g = 1.8-2.5 eV) and relatively high absorption coefficient in the visible region.…”

Section: Electron Transfer Between Heterojunctionsmentioning

confidence: 99%

See 2 more Smart Citations

Understanding the Reaction Mechanism of Photocatalytic Reduction of CO2 with H2O on TiO2-Based Photocatalysts: A Review

Liu

2014

Aerosol Air Qual. Res.

298

217

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Recently, there has been an increasing interest in the research of photocatalytic reduction of CO 2 with H 2 O, an innovative way to simultaneously reduce the level of CO 2 emissions and produce renewable and sustainable fuels. Titanium dioxide (TiO 2 ) and modified TiO 2 composites are the most widely used photocatalysts in this application; however, the reaction mechanism of CO 2 photoreduction on TiO 2 photocatalysts is still not very clear, and the reaction intermediates and product selectivity are not well understood. This review aims to summarize the recent advances in the exploration of reaction mechanism of CO 2 photoreduction with H 2 O in correlation with the TiO 2 photocatalyst characteristics. Discussions are provided in the following sections: (1) CO 2 adsorption, activation and dissociation on TiO 2 photocatalyst; (2) mechanism and approaches to enhance charge transfer from photocatalyst to reactants (i.e., CO 2 and H 2 O); and (3) surface intermediates, reaction pathways, and product selectivity. In each section, the effects of material properties are discussed, including TiO 2 crystal phases (e.g., anatase, rutile, brookite, or their mixtures), surface defects (e.g., oxygen vacancy and Ti 3+) and material modifications (e.g., incorporation of noble metal, metal oxide, and/or nonmetal species to TiO 2 ). Finally, perspectives on future research directions and open issues to be addressed in CO 2 photoreduction are outlined in this review paper.

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Section: Electron Transfer From Tio 2 Cb To Trapping Sitesmentioning

confidence: 99%

Section: Effect Of Materials Modificationmentioning

confidence: 99%

Section: Electron Transfer Between Heterojunctionsmentioning

confidence: 99%

See 1 more Smart Citation

Understanding the Reaction Mechanism of Photocatalytic Reduction of CO2 with H2O on TiO2-Based Photocatalysts: A Review

Liu

2014

Aerosol Air Qual. Res.

298

217

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“…Many works studied different connection modes of Z‐scheme photocatalytic systems 13, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, …”

Section: Introductionmentioning

confidence: 99%

Z‐Scheme Photocatalytic Systems for Promoting Photocatalytic Performance: Recent Progress and Future Challenges

et al. 2016

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Semiconductor photocatalysts have attracted increased attention due to their great potential for solving energy and environmental problems. The formation of Z‐scheme photocatalytic systems that mimic natural photosynthesis is a promising strategy to improve photocatalytic activity that is superior to single component photocatalysts. The connection between photosystem I (PS I) and photosystem II (PS II) are crucial for constructing efficient Z‐scheme photocatalytic systems using two photocatalysts (PS I and PS II). The present review concisely summarizes and highlights recent state‐of‐the‐art accomplishments of Z‐scheme photocatalytic systems with diverse connection modes, including i) with shuttle redox mediators, ii) without electron mediators, and iii) with solid‐state electron mediators, which effectively increase visible‐light absorption, promote the separation and transportation of photoinduced charge carriers, and thus enhance the photocatalytic efficiency. The challenges and prospects for future development of Z‐scheme photocatalytic systems are also presented.

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“…Among the various possible approaches, photocatalysis [2][3][4][5][6] and photoelectrocatalysis [7][8][9][10] have been demonstrated as promising, mainly because these techniques have advantages over CO 2 reduction that can be tuned by using different materials as a photocatalyst when combined with light irradiation. This simple arrangement is able to provide electrons and reactive intermediates able to produce several kinds of hydrocarbons, for instance [11,12].…”

Section: Introductionmentioning

confidence: 99%

A New Si/TiO2/Pt p-n Junction Semiconductor to Demonstrate Photoelectrochemical CO2 Conversion

Guaraldo

Brito

Wood

et al. 2015

Electrochimica Acta

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Photocatalytic reduction of CO2 in methanol to methyl formate over CuO–TiO2 composite catalysts

Cited by 196 publications

References 26 publications

Understanding the Reaction Mechanism of Photocatalytic Reduction of CO2 with H2O on TiO2-Based Photocatalysts: A Review

Understanding the Reaction Mechanism of Photocatalytic Reduction of CO2 with H2O on TiO2-Based Photocatalysts: A Review

Z‐Scheme Photocatalytic Systems for Promoting Photocatalytic Performance: Recent Progress and Future Challenges

A New Si/TiO2/Pt p-n Junction Semiconductor to Demonstrate Photoelectrochemical CO2 Conversion

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