Developing hierarchical CdS/NiO hollow heterogeneous architectures for boosting photocatalytic hydrogen generation

Deng, Chonghai; Ye, Fan; Wang, Tao; Ling, Xuemei; Peng, Lulu; Yu, Hong; Ding, Kangzhe; Hu, Hanmei; Dong, Qiang; Le, Huirong; Han, Yongsheng

doi:10.1007/s12274-021-3960-4

Cited by 49 publications

(14 citation statements)

References 72 publications

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“…The hydrogen rate, apparent quantum efficiencies (AQYs), and boosted amplitude are very high among the reported CdS-based photocatalysts (Table ). ,,,,− The poor photocatalytic HER activities of bare CdS and the Ni–Co PBA are attributed to the fast recombination of photoinduced electron–hole pairs and the lack of a good light-harvesting material, respectively. However, the combination of both dramatically boosts the photocatalytic activity by making up for their respective shortcomings.…”

Section: Resultsmentioning

confidence: 99%

Boosting Hydrogen Evolution Performance of a CdS-Based Photocatalyst: In Situ Transition from Type I to Type II Heterojunction during Photocatalysis

et al. 2022

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The heterojunction in photocatalysis establishes an internal electric field between the semiconductors, which is one of the effective methods for enhancing the separation of photogenerated carriers of semiconductors. Herein, a strategy is rationally proposed, which is performed in situ to transform the hybrid photocatalyst composed of the Ni–Co Prussian blue analogue (PBA) and CdS (CP) into another more active hybrid photocatalyst consisting of NiS and CdS (CN) during photocatalysis in the sulfur sacrificial reagent. The coupled component on the n-type CdS is converted from an n-type Ni–Co PBA to another p-type NiS during the process, thus constructing a p–n heterojunction and achieving a good photocatalytic hydrogen evolution reaction (HER) performance. Moreover, the carrier transfer mechanism is also an in situ transition from type I in CP to type II in CN during the HER process, which is supported by surface photovoltage and transient absorption spectroscopy. The CP-2 photocatalyst in the sulfur sacrificial reagent has a high photocatalytic hydrogen evolution amount of 176.6 μmol, which is 13.9 times higher than that of pure CdS. Overall, this work develops an in situ carrier transfer mechanism conversion strategy for expanding the HER photocatalysts and enhancing their photocatalytic HER performance.

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Section: Resultsmentioning

confidence: 99%

Boosting Hydrogen Evolution Performance of a CdS-Based Photocatalyst: In Situ Transition from Type I to Type II Heterojunction during Photocatalysis

et al. 2022

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“…Commonly, the semiconductor-based photocatalysts demonstrate two categories: (1) photocatalyst materials with a wide bandgap (Eg > 3 eV), including TiO2 [45], ZnO [46] and Ta2O5 [47], which can only absorb ultraviolet (UV) light; (2) narrow-bandgap photocatalysts (Eg ≤ 3eV) that can make use of visible light (e.g., BiVO4 [48], CdS [49], C3N4 [50] and TaON [51]). More cases are presented in Fig.…”

Section: Fundamental Principles Of Heterogeneous Photocatalysismentioning

confidence: 99%

Control of selectivity in organic synthesis via heterogeneous photocatalysis under visible light

Dai

Xiong

2022

Nano Res. Energy

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Organic synthesis driven by heterogeneous catalysis is a central research theme to both fundamental research and industrial production of fine chemicals. However, the employment of stoichiometric strong oxidizing or reducing reagents (e.g., K 2 Cr 2 O 7 and LiAlH 4 ) and harsh reaction conditions (e.g., high temperature and pressure) always leads to the products of overreaction and other by-product residues (e.g., salt and acid waste). Thus the poor control of product selectivity and tremendous energy consumption result in the urgent demand to develop novel technologies for heterogeneous catalysis. Given the current global theme of development in CO 2 reduction and sustainable energy utilization, one promising protocol is heterogeneous photocatalysis. It enables sustainable solar-to-chemical energy conversion under mild conditions (e.g., room temperature, ambient pressure, and air as the oxidant) and offers unique reaction pathways for improved selectivity control. To accurately tailor the selectivity of desired products, the electronic structure (e.g., positions of valence-band maximum and conduction-band minimum), geometric structure (e.g., nanorod, nanosheet, and porous morphology), and surface chemical micro-environment (e.g., vacancy sites and co-catalysts) of heterogeneous photocatalysts require rational design and construction. In this review, we will briefly analyze some effective photocatalytic systems with the excellent regulation ability of product selectivity in organic transformations (mainly oxidation and reduction types) under visible light irradiation, and put forward opinions on the optimal fabrication of nanostructured photocatalysts to realize selective organic synthesis.

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“…Therefore, the search of renewable clean energy has been the main targets to solve environmental and energy problems. Hydrogen is known as the cleanest energy because water is the sole product, which is not harmful to the environment. − Accordingly, hydrogen is considered as one ideal source that can replace traditional fossil energies. However, the present way to prepare hydrogen is mainly based on industrial techniques, which needs to consume plenty of sources .…”

Section: Introductionmentioning

confidence: 99%

N-Doped Carbon Nanofibers Coupled with TiO₂ Quantum Dots for Photocatalytic Hydrogen Production

Zhang

Zhong

et al. 2022

ACS Appl. Nano Mater.

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Small-sized particles are usually used as cocatalysts and anchored onto a large-sized photocatalyst for fast charge separation. However, the current problem for the design of photocatalysts is that a high loading of small-sized particles leads to full coverage of photocatalysts, resulting in the decrease of hydrogen production. Here, we propose a different way to construct photocatalytic systems. Large-scale carbon nanotubes with doped nitrogen (N-CNTs) are used to couple with TiO 2 quantum dots. The H 2 yield for our optimized photocatalytic system is ∼146 mmol/g. With further considering the light-induced thermal effect, the H 2 yield reaches up to ∼320.6 mmol/g. Electrochemical and spectroscopic data show that large-sized N-CNTs can offer abundant active sites to realize the rapid carrier separation for tremendously improved hydrogen production.

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Developing hierarchical CdS/NiO hollow heterogeneous architectures for boosting photocatalytic hydrogen generation

Cited by 49 publications

References 72 publications

Boosting Hydrogen Evolution Performance of a CdS-Based Photocatalyst: In Situ Transition from Type I to Type II Heterojunction during Photocatalysis

Boosting Hydrogen Evolution Performance of a CdS-Based Photocatalyst: In Situ Transition from Type I to Type II Heterojunction during Photocatalysis

Control of selectivity in organic synthesis via heterogeneous photocatalysis under visible light

N-Doped Carbon Nanofibers Coupled with TiO₂ Quantum Dots for Photocatalytic Hydrogen Production

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Developing hierarchical CdS/NiO hollow heterogeneous architectures for boosting photocatalytic hydrogen generation

Cited by 49 publications

References 72 publications

Boosting Hydrogen Evolution Performance of a CdS-Based Photocatalyst: In Situ Transition from Type I to Type II Heterojunction during Photocatalysis

Boosting Hydrogen Evolution Performance of a CdS-Based Photocatalyst: In Situ Transition from Type I to Type II Heterojunction during Photocatalysis

Control of selectivity in organic synthesis via heterogeneous photocatalysis under visible light

N-Doped Carbon Nanofibers Coupled with TiO2 Quantum Dots for Photocatalytic Hydrogen Production

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Product

Resources

About

N-Doped Carbon Nanofibers Coupled with TiO₂ Quantum Dots for Photocatalytic Hydrogen Production