Synthesis of BiOCl/ZnMoO4 heterojunction with oxygen vacancy for enhanced photocatalytic activity

Chen, Piao; Zhi, Zhang; Shui-jin, Yang; Yang, Yun; Sun, Yong

doi:10.1007/s10854-021-06805-6

Cited by 8 publications

(2 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…电子传输桥梁的 rGO 和构建的 Z 型异质结。 Yan 等 [35] 通过在板状 ZnMoO 4 表面原位溶剂热直接生长 BiOI, 成功制备了新型可见光驱动的 ZnMoO 4 /BiOI 异质结, 在可见光照射下降解 TC 来探究其光催化性能。结果表明, 质量分数 30% ZnMoO 4 /BiOI 复合材料表现出最高的光催化性能。此外, Chen 等 [36] 采近年来, S 型异质结光催化剂以其独特的优势, 引起了广泛关注 [37][38] 。在 S 型异质结光催化体系中, 引入的内建电场(IEF)能够有效地调节载流子的迁移方向, 从而提高光生空穴和电子的氧化还原能力和寿命。IEF 和能带弯曲可以加速氧化还原性低的载流子复合, 而氧化还原能力高的载流子得以保留。因此, 构建 S 型异质结是提高光催化效率的有效方法。基于以上分析, 将具有合适能带结构的 BiOBr 面衍射峰吻合 [39] , 2θ=18.83°、 24.43°、 30.58°、 36.15°、 53.75°和 64.83°处的衍射峰可归属于单斜晶系 ZnMoO 4 (PDF#25-1024) 的(100)、 (110)、 (111)、 (021)、 (221)和(040)晶面 [32] 。此外, 从图 2(a)可以看出, [41][42] 。图 4(a)为样品的全波段光谱及其在可见光照样品都是 n 型半导体。在 pH 7, Ag/AgCl 电极条件下测得的 BiOBr 与 ZnMoO 4 的平带电势(E f,Ag/AgCl ) 分别为 -0.11 V 和 -1.24 V, 通过公式 E f,NHE = E f,Ag/AgCl +0.197 转换为标准氢电极电势 [1][2][3] , 由此计算 BiOBr 与 ZnMoO 4 的 E f,NHE 为 0.08 和-1.04 eV。通常, n 型半导体的 E f,NHE 与 CB 位置接近 [4][5] 利用范围。半导体带隙可以通过 Tauc 图方法获得 [6][7] , BiOBr 与 ZnMoO 4 半导体的禁带宽度(E g )分别为 2.95 参考文献:…”

Section: 状晶体结构而被广泛研究其潜在的原子和原子轨道unclassified

BiOBr/ZnMoO₄ Step-scheme Heterojunction: Construction and Photocatalytic Degradation Properties

MA¹,

LI²,

Chen³

et al. 2023

Journal of Inorganic Materials

View full text Add to dashboard Cite

Photocatalysis is widely used for the removal of refractory organic pollutants in water, but the catalytic activity of semiconductor photocatalysts is significantly inhibited due to the high recombination rate of photogenerated electrons and holes. In this study, an S-scheme BiOBr/ZnMoO 4 composite was successfully prepared by a facile solvothermal method. The structure analysis, in-situ XPS, work function test, free radical capture and ESR experiment confirmed that the BiOBr/ZnMoO 4 composite formed an S-scheme heterojunction. The experimental results show that BiOBr/ZnMoO 4 heterojunction with appropriate ZnMoO 4 content can significantly improve the photocatalytic performance of BiOBr. Compared with pure BiOBr and ZnMoO 4 , 15% BiOBr/ZnMoO 4 exhibits the best photocatalytic activity under visible light irradiation, and the photocatalytic degradation rate of bisphenol A reaches 85.3% (90 min). The rate constants of photodegradation of ciprofloxacin are 2.6 times that of BiOBr and 484 times that of ZnMoO 4 , respectively. This can be attributed to the tight interfacial bonding between BiOBr and ZnMoO 4 and 第 1 期马心全, 等: S 型异质结 BiOBr/ZnMoO 4 的构建及光催化降解性能研究 63 the formation of S-scheme heterojunction, which enables the efficient spatial separation and transfer of photogenerated carriers. This work provides a simple and efficient method for the directional synthesis of Bi-based S-scheme heterojunction photocatalytic materials, and provides a new theory and experimental basis for further understanding of the structure-activity relationship of Bi-based multi-heterojunction photocatalytic materials.

show abstract

Section: 状晶体结构而被广泛研究其潜在的原子和原子轨道unclassified

BiOBr/ZnMoO₄ Step-scheme Heterojunction: Construction and Photocatalytic Degradation Properties

MA¹,

LI²,

Chen³

et al. 2023

Journal of Inorganic Materials

View full text Add to dashboard Cite

show abstract

“…ZnMoO 4 is a non-toxic oxidation metal commonly used as anode material (Fei et al, 2017;Zhang, Feng, Liu, & Guo, 2019), catalyst (Petrović et al, 2021), anti-bacterial (Mardare, Tanasic, Rathner, Müller, & Hassel, 2016), and anti-corrosion (Xing, Xu, Wang, & Hu, 2019) as well as photocatalyst (Chen, Zhang, Yang, Yang, & Sun, 2021;Yan et al, 2019). β-ZnMoO 4 has a monoclinic phase system with Zn and Mo atomic bonds attached to 6 oxygen atoms and can adsorb visible light.…”

Section: Introductionmentioning

confidence: 99%

Easy Preparation of Zinc Molybdate Photocatalyst and Its Application for Degradation of Methylene Blue

Bakri,

Firmansyah,

Yulizar

2023

j.ris.technol.pencegah.

View full text Add to dashboard Cite

Photocatalyst is one way that can be done to overcome the problem of dye waste in water. Hazardous chemicals are regularly used in the manufacture of photocatalysts. In this research, ZnMoO4 was prepared by an environmentally friendly and cost-effective synthesis. The functional groups, crystalline structure and morphology of ZnMoO4 were characterised using fourier transform infrared (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The band gap energy has been studied through UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The photocatalytic activity of ZnMoO4 was tested against the organic pollutant methylene blue under visible light irradiation and its degradation products were analyzed with a UV-Vis spectrophotometer at a wavelength of 664 nm. The photocatalytic process of ZnMoO4 has been able to degrade 99% of methylene blue after 80 minutes of irradiation. The excellent photodegradation performance indicates that the transition activity of electron currents from the valence band to the conduction band on ZnMoO4 is going well.

show abstract

Z-scheme CoWO4/g-C3N4 heterojunction for enhanced ultraviolet-light-driven photocatalytic activity towards the degradation of tetracycline

Zhu,

Wang,

Feng

et al. 2024

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Synthesis of BiOCl/ZnMoO4 heterojunction with oxygen vacancy for enhanced photocatalytic activity

Cited by 8 publications

References 55 publications

BiOBr/ZnMoO₄ Step-scheme Heterojunction: Construction and Photocatalytic Degradation Properties

BiOBr/ZnMoO₄ Step-scheme Heterojunction: Construction and Photocatalytic Degradation Properties

Easy Preparation of Zinc Molybdate Photocatalyst and Its Application for Degradation of Methylene Blue

Z-scheme CoWO4/g-C3N4 heterojunction for enhanced ultraviolet-light-driven photocatalytic activity towards the degradation of tetracycline

Contact Info

Product

Resources

About

Synthesis of BiOCl/ZnMoO4 heterojunction with oxygen vacancy for enhanced photocatalytic activity

Cited by 8 publications

References 55 publications

BiOBr/ZnMoO4 Step-scheme Heterojunction: Construction and Photocatalytic Degradation Properties

BiOBr/ZnMoO4 Step-scheme Heterojunction: Construction and Photocatalytic Degradation Properties

Easy Preparation of Zinc Molybdate Photocatalyst and Its Application for Degradation of Methylene Blue

Z-scheme CoWO4/g-C3N4 heterojunction for enhanced ultraviolet-light-driven photocatalytic activity towards the degradation of tetracycline

Contact Info

Product

Resources

About

BiOBr/ZnMoO₄ Step-scheme Heterojunction: Construction and Photocatalytic Degradation Properties

BiOBr/ZnMoO₄ Step-scheme Heterojunction: Construction and Photocatalytic Degradation Properties