Fabrication of ZnSn(OH)6/ZnO/BiOBr with high photocatalytic efficiency in removal of various organic pollutants

Wang, Shuang; Hao, Wenjie; Chen, Mei-ru; Han, Ya-jie; Cheng, Caihong; Shen, Luyan; Ji, Guo-jia; Song, Ai‐jun; Zhang, Zhiwei; Lu, Xulin

doi:10.1016/j.jallcom.2021.162920

Cited by 11 publications

(7 citation statements)

References 49 publications

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“…The results prove the existence of Br with −1 valence . In Figure d, the two distinct peaks at 164.64 and 159.36 eV in the fine spectrum of Bi 4f are ascribed to Bi 4f 5/2 and Bi 4f 7/2 spin orbit coupling, respectively, proving the existence of Bi 3+ valence states . In addition, the energy spectrum of Zn is shown in Figure e.…”

Section: Results and Discussionmentioning

confidence: 62%

“…21 In Figure 4d, the two distinct peaks at 164.64 and 159.36 eV in the fine spectrum of Bi 4f are ascribed to Bi 4f 5/2 and Bi 4f 7/2 spin orbit coupling, respectively, proving the existence of Bi 3+ valence states. 22 In addition, the energy spectrum of Zn is shown in Figure 4e. The peaks at 1044.77 and 1021.78 eV correspond to Zn 2p 1/2 and Zn 2p 3/2 , respectively, indicating the existence of the Zn 2+ oxidation state in BiOBr/ZnO composites.…”

Section: Characterizationmentioning

confidence: 99%

“…The result indicates that the BiOBr/ZnO composite sensor has good long-term stability. In Figure 7e,f, the influence of relative humidity (22,32,48, and 62% RH) on the BiOBr/ZnO sensor is investigated. As shown in Figure 7e, with the increase of relative humidity, the recovery speed gradually becomes slow.…”

Section: Gas Sensitivitymentioning

confidence: 99%

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Triethylamine Gas Sensors Based on BiOBr Microflowers Decorated with ZnO Nanocrystals

Wang

Liu

et al. 2022

ACS Appl. Nano Mater.

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In this work, ZnO nanocrystals (NCs) are innovatively decorated on the hierarchically porous microflowers (MFs) of BiOBr. The preparation is accompanied by the construction of n−n nano-heterojunctions. The crystallographic information, microstructure, oxygen vacancy, and gas sensing performances of BiOBr/ZnO composites are investigated. The BiOBr/ZnO sensor presents excellent response characteristics to triethylamine (TEA). Compared with BiOBr MFs and pure ZnO NCs, the BiOBr/ZnO composite sensor exhibits a higher response (R a /R g ) of about 20.57 to 100 ppm TEA at 200 °C. The sensor also shows good selectivity and durable long-term stability, besides the low detection limit of 112 ppb. Even more appealingly, the response time is only 4 s. The improved TEA sensing performance of BiOBr MFs modified with ZnO NCs can be mainly attributed to the unique hierarchical heterogeneous microstructure. Furthermore, the construction of n−n BiOBr/ZnO heterostructures leads to a large specific surface area and effective electron transport, which facilitate the surface reaction and diffusion of TEA molecules. The BiOBr/ZnO composite sensor based on n−n nano-heterojunctions may provide a valuable strategy for the detection of volatile organic compounds.

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Section: Results and Discussionmentioning

confidence: 62%

Section: Characterizationmentioning

confidence: 99%

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Triethylamine Gas Sensors Based on BiOBr Microflowers Decorated with ZnO Nanocrystals

Wang

Liu

et al. 2022

ACS Appl. Nano Mater.

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“…15,16 Sin et al 17 synthesized a novel ZnO/Nd-BiOBr composite, which realized the photodegradation of phenol under visible light in 75 min. Wang et al 18 prepared ZnSn(OH) 6 /ZnO/BiOBr photocatalysts by coprecipitation and sonication methods, and the degradation rates of rhodamine B (RhB) reached 97.30% in 80 min. Yang et al 19 synthesized a visible light-induced ZnO/BiOBr-functionalized cotton fabric photocatalyst, which had a higher self-cleaning character and antibacterial activity.…”

Section: Introductionmentioning

confidence: 99%

“…As the first traditional photocatalyst to be studied, the photocatalysts based on ZnO show many unique characteristics (such as nontoxicity, low cost, and high catalytic activity), and they have received a lot of attention in photodegradation of dyes and antibiotics. , Sin et al synthesized a novel ZnO/Nd-BiOBr composite, which realized the photodegradation of phenol under visible light in 75 min. Wang et al prepared ZnSn(OH) 6 /ZnO/BiOBr photocatalysts by coprecipitation and sonication methods, and the degradation rates of rhodamine B (RhB) reached 97.30% in 80 min. Yang et al synthesized a visible light-induced ZnO/BiOBr-functionalized cotton fabric photocatalyst, which had a higher self-cleaning character and antibacterial activity.…”

Section: Introductionmentioning

confidence: 99%

Bi Quantum Dots Supported on BiOBr Nanoparticles and Loaded on Porous ZnO as a Photocatalyst for Dye Degradation and H₂ Production

Guan,

Ma,

et al. 2024

ACS Appl. Nano Mater.

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Synergetic photocatalytic H 2 production by organic dye photodegradation is always a goal. However, the related research has been hindered due to the uncontrollability of this process. This study prepares the ZnO/Bi-QDs/BiOBr photocatalyst, and the hole (h + ) aggregation phase (ZnO) is constructed into a lamellar porous structure to improve its adsorption capacity for dyes based on the energy level structure of the composite. By this method, the reactive groups used for photodegradation of dyes are controlled to h + and • OH, e − is used for photocatalytic H 2 production, and the synergistic effect of dye photodegradation and photocatalytic H 2 production is realized. Under the action of this photocatalyst and visible light, rhodamine B (RhB) is completely degraded in 8 min, the time can be reduced to 2 min when pH is 5, and it can realize the complete degradation of RhB in 120 min under natural sunlight. The H 2 production rate reaches 1678 μmol•g −1 •h −1 in RhB (h + scavenger) aqueous solution under visible light. This study provides an effective method and design idea for the design of photocatalysts with photocatalytic H 2 production during the photodegradation of organic dyes.

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Ethanolamine gas sensors based on NdFeO3 modified hexagonal pyramid shaped ZnO nanocrystals

Li,

Gao,

Sun

et al. 2024

Ceramics International

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Fabrication of ZnSn(OH)6/ZnO/BiOBr with high photocatalytic efficiency in removal of various organic pollutants

Cited by 11 publications

References 49 publications

Triethylamine Gas Sensors Based on BiOBr Microflowers Decorated with ZnO Nanocrystals

Triethylamine Gas Sensors Based on BiOBr Microflowers Decorated with ZnO Nanocrystals

Bi Quantum Dots Supported on BiOBr Nanoparticles and Loaded on Porous ZnO as a Photocatalyst for Dye Degradation and H₂ Production

Ethanolamine gas sensors based on NdFeO3 modified hexagonal pyramid shaped ZnO nanocrystals

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Fabrication of ZnSn(OH)6/ZnO/BiOBr with high photocatalytic efficiency in removal of various organic pollutants

Cited by 11 publications

References 49 publications

Triethylamine Gas Sensors Based on BiOBr Microflowers Decorated with ZnO Nanocrystals

Triethylamine Gas Sensors Based on BiOBr Microflowers Decorated with ZnO Nanocrystals

Bi Quantum Dots Supported on BiOBr Nanoparticles and Loaded on Porous ZnO as a Photocatalyst for Dye Degradation and H2 Production

Ethanolamine gas sensors based on NdFeO3 modified hexagonal pyramid shaped ZnO nanocrystals

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Product

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Bi Quantum Dots Supported on BiOBr Nanoparticles and Loaded on Porous ZnO as a Photocatalyst for Dye Degradation and H₂ Production