Synthesis of butterfly-like ZnO nanostructures and study of their self-reducing ability toward Au3+ ions for enhanced photocatalytic efficiency

2016 ◽  
Vol 18 (6) ◽  
pp. 4577-4584 ◽  
Author(s):  
Xueling Song ◽  
Yumeng Liu ◽  
Yan Zheng ◽  
Kun Ding ◽  
Shijie Nie ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
The Self ◽  
Zno Nanostructures ◽  
Photocatalytic Efficiency ◽  
Reducing Ability

Hierarchical ZnO–Au composites exhibiting enhanced photocatalytic performance were synthesized by utilizing the self-reducing ability of the as-obtained ZnO.

Facile and sustainable synthesis of carbon-doped ZnO nanostructures towards the superior visible light photocatalytic performance

2017 ◽  
Vol 41 (17) ◽  
pp. 9314-9320 ◽  
Author(s):  
Sajid Ali Ansari ◽  
S. G. Ansari ◽  
H. Foaud ◽  
Moo Hwan Cho
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Zno Nanostructures ◽  
Photoelectrochemical Performance ◽  
Carbon Doped ◽  
Visible Light Driven ◽  
Doped Zno ◽  
Visible Light Photocatalytic

Design of carbon doped ZnO nanostructures towards enhanced visible light driven photocatalytic and photoelectrochemical performance.

The Functional TiO2-Biodegradable Plastic Composite Material Produced by HVOF Spraying Process

2007 ◽  
Vol 7 (11) ◽  
pp. 3830-3833 ◽  
Author(s):  
Hee-Seon Bang ◽  
Han-Sur Bang ◽  
Yoon-Ki Lee
Keyword(s):  
Photocatalytic Performance ◽  
Xrd Analysis ◽  
Gas Pressure ◽  
Photocatalytic Efficiency ◽  
Hvof Spraying ◽  
Photo Degradation ◽  
Fuel Gas ◽  
Plastic Composite ◽  
Polybutylene Succinate ◽  
Spraying Process

Photocatalytic TiO2 coatings on bio-degradable plastic(polybutylene succinate: PBS) were prepared by HVOF spraying using three kinds of agglomerated powders (P200: 200 nm, P30: 30 nm, P7: 7 nm). The microstructures of the coatings were characterized with SEM and XRD analysis, and the photocatalytic efficiency of the coatings was evaluated by photo degradation of gaseous acetaldehyde. For both the HVOF sprayed P200 and P30 coatings, high anatase ratio of 100% was achieved, regardless of the fuel gas pressure. On the other hand, for the HVOF sprayed P7 coating, the anatase ratio decreased from 100% to 49.1% with increasing fuel gas pressure. This decrease may be attributed to the much higher susceptibility to heat of the 7 nm agglomerated powders than the 30 nm and 200 nm agglomerated powders. In terms of the photocatalytic efficiency, HVOF sprayed P200 and P30 coatings seemed to outperform the P7 coatings because of their higher anatase ratios. However, the HVOF sprayed P7 coatings did not show photocatalytic activity possibly because of the extremely small reaction surface area to the photo-catalytic activity and low anatase ratio. Therefore, the present study found that functional PBS plastic with photocatalytic performance could be produced by spraying of ceramics such as TiO2.

Morphology engineering of ZnO nanostructures for enhanced photocatalytic efficiency of In(OH)3/ZnO nanocomposite

2021 ◽  
Vol 535 ◽  
pp. 147657
Author(s):  
Yinli Duan ◽  
Jing Ma ◽  
Jianan Dai ◽  
Liangsheng Qiang ◽  
Juanqin Xue
Keyword(s):  
Zno Nanostructures ◽  
Photocatalytic Efficiency ◽  
Morphology Engineering

scholarly journals Ag2O-decorated electrospun BiVO4 nanofibers with enhanced photocatalytic performance

RSC Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 6114-6120 ◽  
Author(s):  
Junpeng Ren ◽  
Yongyong Zhu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Cycling Stability ◽  
Photocatalytic Efficiency ◽  
Heterogeneous Structures ◽  
Good Cycling Stability ◽  
Visible Light Photocatalytic

Ag2O doped electrospun BiVO4 nanofibers with p–n junction heterogeneous structures show enhanced photocatalytic activity under visible light (photocatalytic efficiency: 98.47% within 100 min) and good cycling stability.

Temperature and Salinity Effects on Photocatalytic Performance of Cerium Doped Zinc Oxide

2020 ◽  
Vol 307 ◽  
pp. 223-228
Author(s):  
Wan Rafizah Wan Abdullah ◽  
Lee Chia Siang ◽  
Maishara Syazrinni Rooshde ◽  
Mohd Sabri Mohd Ghazali
Keyword(s):  
Photocatalytic Performance ◽  
Catalyst Surface ◽  
Uv Light ◽  
Operating Temperature ◽  
Chloride Ions ◽  
Photocatalytic Efficiency ◽  
Electron Hole ◽  
Doped Zno ◽  
The Stability ◽  
Uv C

Cerium (Ce) doped ZnO is a promising material for advanced photocatalysis. It is useful for inducing the treatment of many organic pollutants in water. However, the stability of its performance under varying temperature and saline condition has never been not fully assessed. In this study, powder form photocatalyst comprising 99.0 mol% ZnO and 1 mol% CeO2 has been synthesized via modified citrate gelation technique and solid-state sintering at 1200 °C for 5 hours. The conversion of Ce doped ZnO from its precursors has been confirmed using XRD, SEM, and EDX techniques. The photocatalytic efficiency of the synthesized Ce doped ZnO under UV-C light (λ=265 nm) was determined. In the experiment, the operating temperature was varied between 25 to 40 °C, and the salinity of the treated solution was increased from 0 to 40 g/L NaCl. The findings revealed that the photocatalytic efficiency of Ce doped ZnO under UV light improved from 78.2% to 88.6% as the temperature increased from 25 to 40 °C. The performance of Ce doped ZnO decreased from 86.7% to 36.7% when the salinity increased from 0 g/L to 40 g/L. The elevation of temperature encouraged the photogeneration of electron-hole pairs on catalyst surface while the presence of chloride ions in treated medium caused scavenging of hydroxyl radicals or hole.

Effect of Morphology-based Defect Structure of ZnO Nanostructures in Photo-Degradation of Organic Dye

2014 ◽  
Vol 1672 ◽  
Author(s):  
Reza Shidpour ◽  
Manouchehr Vosoughi ◽  
Abdolreza Simchi ◽  
Faegheh Ghanbari
Keyword(s):  
Defect Structure ◽  
Aqueous Suspension ◽  
Organic Dye ◽  
Zno Nanostructures ◽  
Photocatalytic Efficiency ◽  
Porous Network ◽  
Sem Images ◽  
Photo Degradation ◽  
Annealing Temperatures ◽  
Zinc Oxides

ABSTRACTThe fabrication of strong photocatalysts applied to the degradation of organic pollutants is necessary in environmental applications. In a single-stage method, acetate precursor and poly vinyl pyrolydine are used to produce ZnO nanostructures with various morphologies in annealing temperatures ranging from 300 °C to 900 oC. The physical properties of the prepared nanostructures were characterized by SEM, XRD and PL spectroscopy. The SEM images exhibit a variety of the as-prepared hexagonal zinc oxides including wires, rods, particles and porous network of welded particles of ZnO nanoparticles. The results of the photocatalytic degradation of methylene blue as an organic dye in aqueous suspension showed that the morphology of ZnO nanostructures influences on the photocatalytic efficiency of ZnO nanostructures, greatly. For the best result, the highest MB degradation occurs by ZnO nanowires within 16 minutes and in others samples, degradation of higher than 95 percent occurs within 20 minutes. The XRD and PL spectroscopy revealed neither VZn nor Oi are in all of samples but only VO−, VO2− and Zni exist in ZnO nanostructures.

NiFe-LDH@ZnO@NF composite for photo-degradation of Rhodamine B dye

MRS Advances ◽  
2019 ◽  
Vol 4 (33-34) ◽  
pp. 1887-1893
Author(s):  
Jun Wu ◽  
Yonghui Gong ◽  
Qiang Fu ◽  
Chunxu Pan
Keyword(s):  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Nickel Foam ◽  
Photogenerated Electron ◽  
Chemical Compositions ◽  
Photocatalytic Efficiency ◽  
Electron Hole ◽  
Photo Degradation ◽  
Potential Applications ◽  
Rhodamine B Dye

ABSTRACTIn this paper, a novel NiFe-LDH@ZnO composite was prepared by using a facile two-step process upon nickel foam (NF) substrate. The morphologies and chemical compositions of the samples were characterized by SEM, EDS, XRD and XPS. Photocatalytic degradation of Rhodamine B dye was tested with the samples NiFe-LDH@ZnO@NF, ZnO@NF and NiFe-LDH under the same conditions. The experimental results revealed that the NiFe-LDH@ZnO@NF composite exhibited excellent photocatalytic performance, i.e., 1.4 and 2.5 times higher than that of pure ZnO and NiFe-LDH, respectively. The reason was that the NiFe-LDH@ZnO@NF composite provided a possibility to effectively inhibit the recombination of the photogenerated electron-hole pairs, and therefore enhanced the photocatalytic efficiency. This composite is expected to have potential applications in wastewater treatment field.

scholarly journals Recent Advances and Applications of Semiconductor Photocatalytic Technology

2019 ◽  
Vol 9 (12) ◽  
pp. 2489 ◽  
Author(s):  
Fubao Zhang ◽  
Xianming Wang ◽  
Haonan Liu ◽  
Chunli Liu ◽  
Yong Wan ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Low Cost ◽  
Research Topic ◽  
Living Standards ◽  
Photocatalytic Reaction ◽  
Large Specific Surface Area ◽  
Photocatalytic Efficiency ◽  
Comprehensive Information ◽  
Full Utilization

Along with the development of industry and the improvement of people’s living standards, peoples’ demand on resources has greatly increased, causing energy crises and environmental pollution. In recent years, photocatalytic technology has shown great potential as a low-cost, environmentally-friendly, and sustainable technology, and it has become a hot research topic. However, current photocatalytic technology cannot meet industrial requirements. The biggest challenge in the industrialization of photocatalyst technology is the development of an ideal photocatalyst, which should possess four features, including a high photocatalytic efficiency, a large specific surface area, a full utilization of sunlight, and recyclability. In this review, starting from the photocatalytic reaction mechanism and the preparation of the photocatalyst, we review the classification of current photocatalysts and the methods for improving photocatalytic performance; we also further discuss the potential industrial usage of photocatalytic technology. This review also aims to provide basic and comprehensive information on the industrialization of photocatalysis technology.

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