Hollow Au‐ZnO/CN Nanocages Derived from ZIF‐8 for Efficient Visible‐Light‐Driven Hydrogen Evolution from Formaldehyde Alkaline Solution

Yang, Hongchen; Zhang, Shengbo; Li, Mei; Liu, Xiao; Han, Jinyu; Zhu, Xinli; Ge, Qingfeng; Wang, Hua

doi:10.1002/ejic.201900313

Cited by 11 publications

(5 citation statements)

References 45 publications

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“…As is known, loading noble metals as cocatalysts (e.g., Pt and Au) on a photocatalyst is a commonly used method to enhance the H 2 production rate, which can effectively improve the charge separation and provide active sites. − Especially, Pt is considered as the most effective cocatalyst for CdS because of its high work function and redox potential. , Herein, 1.0 wt % of Pt was chosen as the reference, and 1% Pt/CdS was prepared by injecting H 2 PtCl 6 solution in the reaction system under visible light irradiation. After the CdS-T200 sample deposited with 1.0 wt % Pt (Figure ), the H 2 production activity is increased, but still lower than that of the 1.5 wt % NiS/CdS-T200 sample.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Performance of NiS/CdS Composite with Multistage Structure

Yang

Meng

Jiang

et al. 2020

ACS Appl. Energy Mater.

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Construction of heterojunctions between semiconductors is a significant way to promote the photocatalytic performance by improving the photogenerated charge separation. Herein, CdS with multistage structures (sphere, flower, and wheat) were first synthesized, and their photocatalytic activities of hydrogen production were not too high as massive electrons and holes are rapidly recombined. NiS/CdS composites were then prepared by depositing NiS nanofragments on the CdS surface, which exhibited higher photocatalytic activity (about 13-fold) than pure CdS. The enhanced reason is the effective charge separation and transfer (Z-scheme charge migration) formed between p-type NiS and n-type CdS, which is confirmed by Mott− Schottky plots and density of states. Moreover, the NiS/CdS composite shows much more efficient charge transfer than pure CdS, indicated by photocurrent response and photoluminescence. Therefore, this study offers an important strategy for the design of multistage structural photocatalysts with a p−n heterojunction to improve the charge separation.

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Section: Resultsmentioning

confidence: 99%

Photocatalytic Performance of NiS/CdS Composite with Multistage Structure

Yang

Meng

Jiang

et al. 2020

ACS Appl. Energy Mater.

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“…A hollow Au 0.4 /Zn‐ZIF‐8 nanocage was constructed using the Kirkendall effect (Figure 9m). [ 104 ] After pyrolysis at 550°C in a N 2 atmosphere, the Au 0.4 /Zn‐ZIF‐8 nanocage is converted to a hollow Au 0.40 ‐ZnO/CN composite. Au0.40‐ZnO/CN consists of uniform cubic particles, with Au and ZnO NPs (≈5 nm) dispersed on the carbon shells, as shown in Figure 9n,o.…”

Section: Hollowing Mechanisms For Zif‐8/67 Derived Hcasmentioning

confidence: 99%

Hollow Carbon‐Based Nanoarchitectures Based on ZIF: Inward/Outward Contraction Mechanism and Beyond

Song

Jiang

Cheng

et al. 2020

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Hollow carbon‐based nanoarchitectures (HCAs) derived from zeolitic imidazolate frameworks (ZIFs), by virtue of their controllable morphology and dimension, high specific surface area and nitrogen content, richness of metal/metal compounds active sites, and hierarchical pore structure and easy exposure of active sites, have attracted great interests in many fields of applications, especially in heterogeneous catalysis, and electrochemical energy storage and conversion. Despite various approaches that have been developed to prepare ZIF‐derived HCAs, the hollowing mechanism has not been clearly disclosed. Herein, a specialized overview of the recent progress of ZIF‐derived HCAs is introduced to provide an insight into their preparation strategy and the corresponding hollowing mechanisms. Based on the fundamental understanding of the structural evolution of ZIF nanocrystals during the high‐temperature pyrolysis process, the hollowing mechanisms of ZIF‐derived HCAs are classified into four categories: i) inward contraction of core–shell template@ZIF composites or hollow ZIFs, ii) outward contraction of ZIF@shell composites, iii) special outward contraction of ZIF arrays, and iv) mechanism beyond inward/outward contraction of pure ZIF nanocrystals. Finally, an outlook on the development prospects and challenges of HCAs based on ZIF precursors, especially in terms of controlled synthesis and future electrochemical application, is further discussed.

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“…To summarize the features of MOF-based photocatalysts for HER, we tabulate selective findings in Table 2. In addition, there are some interesting results in the literature using heterojunction photocatalysts based on various hybridized components [98][99][100] including metal oxides derived from various ZIF materials, [101,102] another class of MOFs.…”

Section: Mof-derived Photocatalystsmentioning

confidence: 99%

Metal–Organic Frameworks for Photocatalytic Water Splitting

Nguyen

2021

Solar RRL

248

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Various photocatalysts have been developed for photocatalytic water splitting—one of the most important processes that produces dihydrogen as clean energy for fuel cells. The successful achievements for this application are based mainly on transition metal oxides and some metal sulfides/nitrides. Recently, metal–organic frameworks (MOFs), a class of hybrid functional materials comprising organic backbone tethered infinitively in limitless way by metal‐oxide clusters, both of which can be customized accurately at the molecular level for targeted applications, have been able to photocatalytically degrade water. Herein, it is first aimed to comprehensively review fundamentals of water splitting catalyzed by semiconductor photocatalysts, which casts light on understanding of challenges in this area, thus providing strategies for development, if not rational design, of visible‐light‐driven MOFs that are capable of degrading water to hydrogen and oxygen. The recent advancements of using MOF photocatalysts for water splitting are further described in a way that benchmark achievements and limitations are considered so that the readers can imagine the big picture in this field and pay considerable attention to future solutions.

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Hollow Au‐ZnO/CN Nanocages Derived from ZIF‐8 for Efficient Visible‐Light‐Driven Hydrogen Evolution from Formaldehyde Alkaline Solution

Cited by 11 publications

References 45 publications

Photocatalytic Performance of NiS/CdS Composite with Multistage Structure

Photocatalytic Performance of NiS/CdS Composite with Multistage Structure

Hollow Carbon‐Based Nanoarchitectures Based on ZIF: Inward/Outward Contraction Mechanism and Beyond

Metal–Organic Frameworks for Photocatalytic Water Splitting

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