High-efficiency and mechano-/photo- bi-catalysis of piezoelectric-ZnO@ photoelectric-TiO 2 core-shell nanofibers for dye decomposition

You, Hui; Wu, Zheng; Jia, Yanmin; Xu, Xiaoli; Xia, Yuntao; Han, Zichen; Wang, Yu

doi:10.1016/j.chemosphere.2017.05.130

Cited by 114 publications

(29 citation statements)

References 45 publications

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“…The structure modulation of ZnO like nanoarrays, nanotetrapods, core–shell composites and immobilization or loading ZnO onto certain flexible or 3D porous supports are also effective ways. [ 67,69,70 ] For example, Wang and Li et al reported the superior performances of ZnO/C nanocomposite and ZnO/Ni foam in photocatalytic degradation of methylene blue, [ 53,71 ] and the intensity and frequency of the built‐in piezoelectric field with ultrasonic assistance are usually proportional to the ZnO degradation efficiency. [ 57 ] For ZnO nanorods vertically grown on 3D Ni foam, when the solution is stirred by magnetic stirring, fluid eddies are produced in the macroporous structure and the ZnO nanorod are deformed to generate piezoelectric field, leading to an five times enhanced efficiency (entry 15 in Table 1).…”

Section: Piezoelectric Polarization Promoted Photo(electro)catalysismentioning

confidence: 99%

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Pan

Sun

Chen

et al. 2020

Advanced Energy Materials

399

236

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The storage/utilization of solar energy is a promising strategy to alleviate current disparities in energy shortage Direct conversion of solar light into chemical energy by means of photocatalysis or photoelectrocatalysis is currently a point of focus for sustainable energy development and environmental remediation. However, its current efficiency is still far from satisfying, suffering especially from severe charge recombination. To solve this problem, the piezo-phototronic effect has emerged as one of the most effective strategies for photo(electro)catalysis. Through the integration of piezoelectricity, photoexcitation, and semiconductor properties, the built-in electric field by mechanical stimulation induced polarization can serve as a flexible autovalve to modulate the charge-transfer pathway and facilitate carrier separation both in the bulk phase and at the surfaces of semiconductors. This review focuses on illustrating the trends and impacts of research based on piezo-enhanced photocatalytic reactions. The fundamental mechanisms of piezo-phototronics modulated band bending and charge migration are highlighted. Through comparing and classifying different categories of piezo-photocatalysts (like the typical ZnO, MoS 2 , and BaTiO 3 ), the recent advances in polarization-promoted photo(electro)catalytic processes involving water splitting and pollutant degradation are overviewed. Meanwhile the optimization methods to promote their catalytic activities are described. Finally, the outlook for future development of polarization-enhanced strategies is presented.

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Section: Piezoelectric Polarization Promoted Photo(electro)catalysismentioning

confidence: 99%

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Pan

Sun

Chen

et al. 2020

Advanced Energy Materials

399

236

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“…[7][8][9][10] Many papers reported the synergistic effect of bimetallic structures in different catalytic reactions, such as PtCu alloys, [11,12] or PtPd alloys [13] compared to monometallic Pt. As well as Y. Wang et al [14] reported a synergistic effect in a bimetallic structure of ZnO and TiO 2 . The use of gold-based bimetallic catalysts have shown to overcome a lot of these problems, enhancing activity, stability, and selectivity.…”

Section: Introductionmentioning

confidence: 91%

Gold‐Silver Catalysts: Ruling Factors for Establishing Synergism

et al. 2019

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DPU and SOL immobilisation have been used to prepare 1 %AuAg/TiO2 with internal ratio 1 : 1 and 4 : 1 which have been studied as fresh, calcined in air at 300 °C and reduced at 550 °C in H2. TEM‐EDS, XPS, UV‐Vis and CO‐DRIFT allowed to characterize the samples in terms of particle size, particle composition, exposure and oxidation state of metals. Correlating these characteristics to the catalytic behaviour we concluded that only Au‐rich catalysts show synergistic effect, silver in bimetallic systems appears more resistant to oxidation than in monometallic one, thermal treatment enhances the SMSI thus producing (regardless to the post‐treatment) almost the same amount of Auδ+ and also Agδ+. Catalysts prepared by DPU (calcined in air or reduced in H2) are more active than SOL (fresh or calcined) probably due to the higher presence of gold at the surface.

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“…The degradation rate of AO 7 was 93.4% by combining BaTiO 3 microcrystals with ferrous ions. You et al [95] studied a piezoelectric-photocatalytic system, which was composed of a heterogeneous piezoelectric-ZnO@photoelectric-TiO 2 coreshell nanofibers for the degradation of MO. Although the piezoelectric and photoelectric core-shell coupling catalytic system has been developed successfully, the individual contributions of piezoelectric and photoelectric materials in the system have not been clarified.…”

Section: Piezoelectric Materialsmentioning

confidence: 99%

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

Liu

Wang

2020

Chemistry An Asian Journal

173

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Nowadays, an ever-increasing variety of organic contaminants in water has caused hazards to the ecological environment and human health. Many of them are persistent and non-biodegradable. Various techniques have been studied for sewage treatment, including biological, physical and chemical methods. Photocatalytic advanced oxidation processes (AOPs) have received increasing attention due to their fast reaction rates and strong oxidation capability, low cost compared with the non-photolytic AOPs. This review is dedicated to summarizing up-to-date research progress in photocatalytic AOPs, such as Fenton or Fenton-like reaction, ozonation and sulfate radical-based advanced oxidation processes. Mechanisms and activation processes are discussed. Then, the paper summarizes photocatalytic materials and modification strategies, including defect chemistry, morphology control, heterostructure design, noble metal deposition. The future perspectives and challenges are also discussed.

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High-efficiency and mechano-/photo- bi-catalysis of piezoelectric-ZnO@ photoelectric-TiO 2 core-shell nanofibers for dye decomposition

Cited by 114 publications

References 45 publications

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Advances in Piezo‐Phototronic Effect Enhanced Photocatalysis and Photoelectrocatalysis

Gold‐Silver Catalysts: Ruling Factors for Establishing Synergism

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

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