Highly selective photocatalytic production of H2O2 on sulfur and nitrogen co-doped graphene quantum dots tuned TiO2

Zheng, Longhui; Su, Hanrui; Zhang, Jingzhen; Walekar, Laxman S.; Molamahmood, Hamed Vafaei; Zhou, Baoxue; Long, Mingce; Hu, Yun Hang

doi:10.1016/j.apcatb.2018.08.031

Cited by 203 publications

(101 citation statements)

References 73 publications

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“…Forexample,Zheng et al [27] reported aTiO 2 photocatalyst decorated with sulfur and nitrogen co-doped graphene quantum dots (SN-GQD/TiO 2 ;F igure 5a). TheD RS spectra (Figure 5b)revealed the enhanced absorption of light by the SN-GQD/TiO 2 photocatalyst in the visible region (400-620 nm).…”

Section: Modification With Quantum Dotsmentioning

confidence: 99%

Production of Hydrogen Peroxide by Photocatalytic Processes

2020

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Hydrogen peroxide (H2O2) has received increasing attention because it is not only a mild and environmentally friendly oxidant for organic synthesis and environmental remediation but also a promising new liquid fuel. The production of H2O2 by photocatalysis is a sustainable process, since it uses water and oxygen as the source materials and solar light as the energy. Encouraging processes have been developed in the last decade for the photocatalytic production of H2O2. In this Review we summarize research progress in the development of processes for the photocatalytic production of H2O2. After a brief introduction emphasizing the superiorities of the photocatalytic generation of H2O2, the basic principles of establishing an efficient photocatalytic system for generating H2O2 are discussed, highlighting the advanced photocatalysts used. This Review is concluded by a brief summary and outlook for future advances in this emerging research field.

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Section: Modification With Quantum Dotsmentioning

confidence: 99%

Production of Hydrogen Peroxide by Photocatalytic Processes

2020

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“…This is largely a consequence of the intrinsic properties of TiO 2 related to its band gap width and band gap structure, coupled with the sluggish intrinsic surface reaction kinetics of water oxidation, low selectivity toward the two-electron ORR for H 2 O 2 production, and the decomposition of the produced H 2 O 2 by the absorbed UV light and photo-generated electrons/holes, thus significantly hampering the overall photocatalytic performances. 37 In order to mitigate the problems above, various strategies have been explored to improve the photocatalytic performances for H 2 O 2 production over TiO 2 -based photocatalysts, including the incorporation of noble metal 60,66,117 and carbon materials, 48,118 and reaction medium optimization. 47,119 The introduction of noble metals is one powerful route for the design and preparation of advanced TiO 2 -based photocatalysts for H 2 O 2 production.…”

Section: Metal Oxidesmentioning

confidence: 99%

A comparative perspective of electrochemical and photochemical approaches for catalytic H₂O₂ production

2020

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“…In recent years, many efforts have been alternatively devoted to the photocatalytic production of H 2 O 2 due to the advantages of green sources (i. e., water and oxygen) and clean energy input (i. e., sunlight). [6][7][8][9][10][11] It is generally recognized that the performances of the photocatalytic systems may largely depend on the functional properties of photocatalysts. [12,13] As a result, how to enhance the photo-catalytic functions especially the visible-light ones of photocatalysts has been being a hot topic in the current researches.…”

Section: Introductionmentioning

confidence: 99%

Doping Carbon Nitride Quantum Dots into Melamine‐Silver Matrix: An Efficient Photocatalyst with Tunable Morphology and Photocatalysis for H₂O₂ Evolution under Visible Light

et al. 2020

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Carbon nitride quantum dots (CNQDs) were doped into melamine (MA) and silver (Ag) matrix yielding CNQDs@MA−Ag nanocomposites by the supramolecular self‐assembly route. To our surprise, the resulting mesoporous nanocomposites could present different morphologies (i. e., nanowires, nanoflowers, and nanosheets) and especially tunable visible‐light photocatalysis performances depending on the percentages of CNQDs used. It was discovered that the CNQDs@MA−Ag ones with the pinecone‐like structure (containing 30 % CNQDs) could exhibit the strongest visible‐light photocatalysis for splitting water to yield H2O2 with a production efficiency of 39.82 μmol ⋅ g−1 h−1, which is more than ten‐fold higher than that of CNQDs alone. Herein, the nano‐scaled Ag could facilitate the increased light harvesting and the separation as well as transmission of electron‐hole pairs of CNQDs resulting in the enhanced visible‐light photocatalysis of nanocomposites. More importantly, the pinecone‐like ones might additionally enable more exposed active sites of photocatalysis and larger mesoporous specific area of contacting dissolved oxygen in water, leading to the higher photocatalytic efficiency of H2O2 generation. This CNQDs‐based fabrication strategy may open a new door towards the design of a variety of photocatalysts with different morphologies and tunable photocatalysis performances for the efficient splitting water toward H2O2 evolution under sunlight.

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Highly selective photocatalytic production of H2O2 on sulfur and nitrogen co-doped graphene quantum dots tuned TiO2

Cited by 203 publications

References 73 publications

Production of Hydrogen Peroxide by Photocatalytic Processes

Production of Hydrogen Peroxide by Photocatalytic Processes

A comparative perspective of electrochemical and photochemical approaches for catalytic H₂O₂ production

Doping Carbon Nitride Quantum Dots into Melamine‐Silver Matrix: An Efficient Photocatalyst with Tunable Morphology and Photocatalysis for H₂O₂ Evolution under Visible Light

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Highly selective photocatalytic production of H2O2 on sulfur and nitrogen co-doped graphene quantum dots tuned TiO2

Cited by 203 publications

References 73 publications

Production of Hydrogen Peroxide by Photocatalytic Processes

Production of Hydrogen Peroxide by Photocatalytic Processes

A comparative perspective of electrochemical and photochemical approaches for catalytic H2O2 production

Doping Carbon Nitride Quantum Dots into Melamine‐Silver Matrix: An Efficient Photocatalyst with Tunable Morphology and Photocatalysis for H2O2 Evolution under Visible Light

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A comparative perspective of electrochemical and photochemical approaches for catalytic H₂O₂ production

Doping Carbon Nitride Quantum Dots into Melamine‐Silver Matrix: An Efficient Photocatalyst with Tunable Morphology and Photocatalysis for H₂O₂ Evolution under Visible Light