Improved photocatalytic hydrogen production of ZnO/ZnS based photocatalysts by Ce doping

Chang, Chi‐Jung; Huang, Kuang-Tzu; Chen, Jem-Kun; Chu, Kuan-Wu; Hsu, Mu-Hsiang

doi:10.1016/j.jtice.2015.04.024

Cited by 75 publications

(12 citation statements)

References 38 publications

(35 reference statements)

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“…Previously reported studies show that, the modifications of semiconductors such as TiO 2 , ZnO, ZnS and CeO 2 with metals/metal oxides nanoparticles, e.g. Au (Khan et al 2014b), Ag Khan et al 2013;Khan et al 2014a), Hg (Saravanan et al 2013b), Ce (Chang et al 2015), CuO (Saravanan et al 2013c) and CdO (Saravanan et al 2011), highly enhances the photocatalytic activity by shifting the absorption edges to longer wavelength and reducing (Saravanan et al 2013;Tripathy et al 2014).…”

Section: Introductionmentioning

confidence: 99%

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

Saqib

Adnan

Shah

2016

Environ Sci Pollut Res

113

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Titanium dioxide (TiO2) has been considered a useful material for the treatment of wastewater due to its non-toxic character, chemical stability and excellent electrical and optical properties which contribute in its wide range of applications, particularly in environmental remediation technology. However, the wide band gap of TiO2 photocatalyst (anatase phase, 3.20 eV) limits its photocatalytic activity to the ultraviolet region of light. Besides that, the electron-hole pair recombination has been found to reduce the efficiency of the photocatalyst. To overcome these problems, tailoring of TiO2 surface with rare earth metals to improve its surface, optical and photocatalytic properties has been investigated by many researchers. The surface modifications with rare earth metals proved to enhance the efficiency of TiO2 photocatalyts by way of reducing the band gap by shifting the working wavelength to the visible region and inhibiting the anatase-to-rutile phase transformations. This review paper summarises the attempts on modification of TiO2 using rare earth metals describing their effect on the photocatalytic activities of the modified TiO2 photocatalyst.

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Section: Introductionmentioning

confidence: 99%

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

Saqib

Adnan

Shah

2016

Environ Sci Pollut Res

113

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“…This negative effect results from the decrease in the surface area after heating at high temperature. These findings have been evidenced in Ce-doped ZnO/ZnS [98], ZnS 1−x−0.5y O x (OH) y (1:1) [99], and CdS/TiO 2 [85]. Table 9 presents the influence of calcination treatment on the activity of photocatalysts.…”

Section: Calcinationmentioning

confidence: 71%

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Lee

Chang

2019

Catalysts

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Metal sulfide-based photocatalysts have gained much attention due to their outstanding photocatalytic properties. This review paper discusses recent developments on metal sulfide-based nanomaterials for H2 production, acting as either photocatalysts or cocatalysts, especially in the last decade. Recent progress on key experimental parameters, in-situ characterization methods, and the performance of the metal sulfide photocatalysts are systematically discussed, including the forms of heterogeneous composite photocatalysts, immobilized photocatalysts, and magnetically separable photocatalysts. Some methods have been studied to solve the problem of rapid recombination of photoinduced carriers. The electronic density of photocatalysts can be investigated by in-situ C K-edge near edge X-ray absorption fine structure (NEXAFS) spectra to study the mechanism of the photocatalytic process. The effects of crystal properties, nanostructure, cocatalyst, sacrificial agent, electrically conductive materials, doping, calcination, crystal size, and pH on the performance of composite photocatalysts are presented. Moreover, the facet effect and light trapping (or light harvesting) effect, which can improve the photocatalytic activity, are also discussed.

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“…Most studies in the field of photocatalysis are focusedo nt he synthesis,c haracterization of properties,a nd testing of nanomaterials able to catalyze the degradation of pollutants, [32][33][34][35][36][37][38][39][40][41] water splitting, [42][43][44][45][46][47][48][49] or the photoreforming of organic compounds. [50][51][52][53] Some materials used for these applications are transition metal oxides, [54][55][56][57][58][59][60][61][62][63][64] oxynitrides, [65][66][67][68][69][70][71][72][73][74][75] oxysulfides, [76][77][78][79][80]…”

Section: Factors Affecting Photocatalytic Hydrogen Generationmentioning

confidence: 99%

“…Some materials used for these applications are transition metal oxides, oxynitrides, oxysulfides, metal sulfides, and perovskite oxides . However, the most studied material is TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Operational Conditions Affecting Hydrogen Production by the Photoreforming of Organic Compounds using Titania Nanoparticles with Gold

et al. 2018

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Several factors affect photocatalytic hydrogen productivity from the photoreforming of organic compounds, which makes it difficult to optimize operational conditions in photoreactors. To prioritize these factors, we focused on the quantification of the effect of five of them on hydrogen production. Photocatalytic experiments were performed on 67 mL batch photoreactors under UV‐LED lamps (λ=375 nm) using a suspension of TiO2–Au nanoparticles synthesized by a sol–gel approach. The analyzed factors were: (A) presence of Au as a cocatalyst, (B) type of alcohol as the electron donor, (C) intensity of UV light, (D) electron donor concentration, and (E) nanoparticle concentration. A main and interaction effects analysis is presented with reduced fixed effect models for three responses: total hydrogen generation, catalyst productivity, and electron donor productivity. The presence of Au as a cocatalyst (A), the intensity of UV light (C), and their interaction (AC) were the factors with the highest effect. The best configuration allowed us to reach a catalyst productivity of 2925 μmolnormalH2 g−1 h−1.

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Improved photocatalytic hydrogen production of ZnO/ZnS based photocatalysts by Ce doping

Cited by 75 publications

References 38 publications

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Operational Conditions Affecting Hydrogen Production by the Photoreforming of Organic Compounds using Titania Nanoparticles with Gold

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