Development of Visible-Light-Driven Rh–TiO2–CeO2 Hybrid Photocatalysts for Hydrogen Production

Visible-light-driven hydrogen production through photocatalysis has attracted enormous interest owing to its great potential to address energy and environmental issues. However, photocatalysis possesses several limitations to overcome for practical applications, such as low light absorption efficiency, rapid charge recombination, and poor stability of photocatalysts. Here, the preparation of efficient noble metal–semiconductor hybrid photocatalysts for photocatalytic hydrogen production is presented. The prepared ternary Rh–TiO2–CeO2 hybrid photocatalysts exhibited excellent photocatalytic performance toward the hydrogen production reaction compared with their counterparts, ascribed to the synergistic combination of Rh, TiO2, and CeO2.

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Photocatalysis and solar hydrogen production

Pure and Applied Chemistry ◽

10.1351/pac200779111917 ◽

2007 ◽

Vol 79 (11) ◽

pp. 1917-1927 ◽

Cited By ~ 113

Author(s):

Akihiko Kudo

Keyword(s):

Hydrogen Production ◽

Visible Light ◽

Band Gap ◽

Water Splitting ◽

Environmental Issues ◽

Apparent Quantum Yield ◽

Solar Hydrogen ◽

Visible Light Driven ◽

Solar Hydrogen Production ◽

Narrow Band Gap Semiconductors

Photocatalytic water splitting is a challenging reaction because it is an ultimate solution to energy and environmental issues. Recently, many new powdered photocatalysts for water splitting have been developed. For example, a NiO (0.2 wt %)/NaTaO3:La (2 %) photocatalyst with a 4.1-eV band gap showed high activity for water splitting into H2 and O2 with an apparent quantum yield of 56 % at 270 nm. Overall water splitting under visible light irradiation has been achieved by construction of a Z-scheme photocatalysis system employing visible-light-driven photocatalysts, Ru/SrTiO3:Rh and BiVO4 for H2 and O2 evolution, and an Fe3+/Fe2+ redox couple as an electron relay. Moreover, highly efficient sulfide photocatalysts for solar hydrogen production in the presence of electron donors were developed by making solid solutions of ZnS with AgInS2 and CuInS2 of narrow band gap semiconductors. Thus, the database of powdered photocatalysts for water splitting has become plentiful.

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Effect of Rh valence state and doping concentration on the structure and photocatalytic H2 evolution in (Nb,Rh) codoped TiO2 nanorods

Nanoscale ◽

10.1039/d0nr05695b ◽

2020 ◽

Vol 12 (43) ◽

pp. 22082-22090

Author(s):

Jiquan Huang ◽

Ting Lv ◽

Qiufeng Huang ◽

Zhonghua Deng ◽

Jian Chen ◽

...

Keyword(s):

Hydrogen Production ◽

Visible Light ◽

Light Absorption ◽

Valence State ◽

Doping Concentration ◽

Photocatalytic Performance ◽

Tio2 Nanorods ◽

H2 Evolution ◽

Visible Light Absorption ◽

Photocatalytic H2 Evolution

(Nb,Rh) codoped TiO2 nanorods exhibit strong visible light absorption and efficient photocatalytic performance for hydrogen production.

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A two-dimensional metal–organic framework accelerating visible-light-driven H2 production

Nanoscale ◽

10.1039/c9nr00663j ◽

2019 ◽

Vol 11 (17) ◽

pp. 8304-8309 ◽

Cited By ~ 6

Author(s):

Bingquan Xia ◽

Jingrun Ran ◽

Shuangming Chen ◽

Li Song ◽

Xuliang Zhang ◽

...

Keyword(s):

Hydrogen Production ◽

Visible Light ◽

Photocatalytic Performance ◽

Metal Organic Framework ◽

H2 Production ◽

Two Dimensional ◽

Visible Light Driven ◽

Metal Organic ◽

Organic Framework

The photocatalytic performance of hydrogen production is significantly accelerated by a two-dimensional Co-based metal–organic framework.

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Visible-Light Driven TiO2 Photocatalyst Coated with Graphene Quantum Dots of Tunable Nitrogen Doping

Molecules ◽

10.3390/molecules24020344 ◽

2019 ◽

Vol 24 (2) ◽

pp. 344 ◽

Cited By ~ 12

Author(s):

Xiong Sun ◽

Hui-Jun Li ◽

Nanquan Ou ◽

Bowen Lyu ◽

Bojie Gui ◽

...

Keyword(s):

Quantum Dots ◽

Photocatalytic Activity ◽

Visible Light ◽

Light Absorption ◽

Photocatalytic Performance ◽

Light Emission ◽

Graphene Quantum Dots ◽

Visible Light Absorption ◽

Visible Light Driven ◽

Nitrogen Doped Graphene

Nitrogen doped graphene quantum dots (NGQDs) were successfully prepared via a hydrothermal method using citric acid and urea as the carbon and nitrogen precursors, respectively. Due to different post-treatment processes, the obtained NGQDs with different surface modifications exhibited blue light emission, while their visible-light absorption was obviously different. To further understand the roles of nitrogen dopants and N-containing surface groups of NGQDs in the photocatalytic performance, their corresponding composites with TiO2 were utilized to degrade RhB solutions under visible-light irradiation. A series of characterization and photocatalytic performance tests were carried out, which demonstrated that NGQDs play a significant role in enhancing visible-light driven photocatalytic activity and the carrier separation process. The enhanced photocatalytic activity of the NGQDs/TiO2 composites can possibly be attributed to an enhanced visible light absorption ability, and an improved separation and transfer rate of photogenerated carriers.

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An inverse opal TiO2/g-C3N4 composite with a heterojunction for enhanced visible light-driven photocatalytic activity

Dalton Transactions ◽

10.1039/c8dt04496a ◽

2019 ◽

Vol 48 (10) ◽

pp. 3486-3495 ◽

Cited By ~ 23

Author(s):

Juying Lei ◽

Bin Chen ◽

Weijia Lv ◽

Liang Zhou ◽

Lingzhi Wang ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Light Absorption ◽

Separation Efficiency ◽

Photogenerated Electron ◽

Absorption Efficiency ◽

Inverse Opal ◽

Electron Hole ◽

Visible Light Absorption ◽

Visible Light Driven

An inverse opal TiO2/g-C3N4 composite with excellent photogenerated electron–hole separation efficiency and enhanced visible light absorption efficiency was constructed.

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Nitrogen deficient carbon nitride for efficient visible light driven tetracycline degradation: a combination of experimental and DFT studies

Catalysis Science & Technology ◽

10.1039/d0cy01124j ◽

2020 ◽

Vol 10 (20) ◽

pp. 6800-6808

Author(s):

Mier Wang ◽

Changzheng Fan ◽

Shuaijun Yang ◽

Milan Liu ◽

Jun Luo ◽

...

Keyword(s):

Visible Light ◽

Light Absorption ◽

Recombination Rate ◽

Carbon Nitride ◽

Photocatalytic Performance ◽

Graphitic Carbon Nitride ◽

Dft Studies ◽

Visible Light Absorption ◽

Tetracycline Degradation ◽

Visible Light Driven

The narrow visible-light absorption range and a high recombination rate of photo-excited electrons and holes are the main reasons for the confined photocatalytic performance of graphitic carbon nitride (g-C3N4).

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Construction of Strontium Titanate/Binary Metal Sulfide Heterojunction Photocatalysts for Enhanced Visible-Light-Driven Photocatalytic Activity

NANO ◽

10.1142/s1793292018501308 ◽

2018 ◽

Vol 13 (11) ◽

pp. 1850130

Author(s):

Yongwei Yu ◽

Qing Yang ◽

Jiangquan Ma ◽

Wenliang Sun ◽

Chong Yin ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Strontium Titanate ◽

Photocatalytic Performance ◽

Irradiation Time ◽

Phase Interface ◽

Metal Sulfide ◽

Absorption Efficiency ◽

Binary Metal ◽

Visible Light Driven

A novel strontium titanate/binary metal sulfide (SrTiO3/SnCoS4) heterostructure was synthesized by a simple two-step hydrothermal method. The visible-light-driven photocatalytic performance of SrTiO3/SnCoS4 composites was evaluated in the degradation of methyl orange (MO) under visible light irradiation. The photocatalytic performance of SrTiO3/SnCoS4-5% is much higher than that of pure SrTiO3, SnCoS4, SrTiO3/SnS2 and SrTiO3/CoS2. The SrTiO3/SnCoS4 composite material with 5[Formula: see text]wt.% of SnCoS4 showed the highest photocatalytic efficiency for MO degradation, and the degradation rate could reach 95% after 140[Formula: see text]min irradiation time. The enhanced photocatalytic activity was ascribed to not only the improvement of visible light absorption efficiency, but also the construction of a heterostructure which make it possible to effectively separate photoexcited electrons and holes in the two-phase interface.

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