Generation of oxygen vacancies on Sr2FeMoO6 to improve its photocatalytic performance through a novel preparation method involving pH adjustment and use of surfactant

2019 ◽  
Vol 480 ◽  
pp. 262-275 ◽  
Author(s):  
Xin Yao Li ◽  
Zi Feng Yao ◽  
Ling Yun Zhang ◽  
Gan Hong Zheng ◽  
Zhen Xiang Dai ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Preparation Method ◽  
Ph Adjustment

Oxygen vacancy induced electron traps in tungsten doped Bi2MoO6 for enhanced photocatalytic performance

CrystEngComm ◽  
2021 ◽  
Author(s):  
Chang Sun ◽  
Zitong Zhao ◽  
Hougang Fan ◽  
Yanli Chen ◽  
Xiaoyan Liu ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Recombination Rate ◽  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Electron Trap ◽  
Electron Traps

As the concentration of the W dopant increased in the Bi2Mo1−xWxO6 nanosheets, the density of the oxygen vacancies became higher, which served as electron trap centers to lower the recombination rate and enhance the photocatalytic performance.

BiOCl microspheres with controllable oxygen vacancies: Synthesis and their enhanced photocatalytic performance

2021 ◽  
pp. 122751
Author(s):  
Gang Liu ◽  
Yunlong Chen ◽  
Xinmei Liu ◽  
Xiaoyi Wang ◽  
Miaomiao Liu ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Photocatalytic Performance

scholarly journals Oxygen Vacancy Enhanced Photoreduction Cr(VI) on Few-Layers BiOBr Nanosheets

Catalysts ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 558 ◽  
Author(s):  
Yin Peng ◽  
Pengfei Kan ◽  
Qian Zhang ◽  
Yinghua Zhou
Keyword(s):  
Oxygen Vacancies ◽  
Surface Defect ◽  
Photocatalytic Performance ◽  
Electrochemical Impedance ◽  
Light Irradiation ◽  
Solvothermal Reaction ◽  
Defect Engineering ◽  
High Concentration ◽  
Solar Light Irradiation ◽  
2D Nanomaterials

2D nanomaterials, with unique structural and electronic features, had been demonstrated as excellent photocatalysts, whose catalytic properties could be tunable with surface defect engineering. In this work, few-layer BiOBr nanosheets with oxygen vacancies (BiOBr-Ov) have been fabricated by a simple solvothermal reaction with the help of ethylene glycol. The obtained BiOBr-Ov exhibited the superior photocatalytic performance with a complete reduction of Cr(VI) (20 mg/L) within 12 min by visible light irradiation. Moreover, Cr(VI) with a high concentration (such as 30 mg/L) only requires 2 min to be photoreduced completely under solar light irradiation. The enhanced photocatalytic performance is contributed to the existence of oxygen vacancies. It has been proved by the results of electrochemical impedance and photocurrent that oxygen vacancies can effectively suppress recombination of photogenerated carriers.

One step solvothermal synthesis of Bi/BiPO4/Bi2WO6 heterostructure with oxygen vacancies for enhanced photocatalytic performance

2018 ◽  
Vol 44 (6) ◽  
pp. 6918-6925 ◽  
Author(s):  
Fan Yang ◽  
Ximiao Zhu ◽  
Jianzhang Fang ◽  
Dongdong Chen ◽  
Weihua Feng ◽  
...  
Keyword(s):  
Solvothermal Synthesis ◽  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
One Step

Effect of preparation method on the structure and photocatalytic performance of BiOI and Bi5O7I for Hg0 removal

2019 ◽  
Vol 10 (2) ◽  
pp. 355-362 ◽  
Author(s):  
Bingjie Dai ◽  
Anchao Zhang ◽  
Dan Zhang ◽  
Zhichao Liu ◽  
Haixia Li ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Preparation Method

Oriented construction of S-doped, exposed {001} facet BiOBr nanosheets with abundant oxygen vacancies and promoted visible-light-driven photocatalytic performance

CrystEngComm ◽  
2020 ◽  
Vol 22 (44) ◽  
pp. 7684-7692
Author(s):  
Meina Huang ◽  
Ju Li ◽  
Wenli Su ◽  
Xindi Huang ◽  
Bin Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Bandgap Energy ◽  
Visible Light Driven ◽  
Facet Growth

S-doping orients the facet growth of BiOBr nanosheets from original exposed {010} plane towards {001}-dominant plane, resulting in narrower bandgap energy, higher efficient charges separation and oxygen vacancies (OVs) concentration.

scholarly journals Ag as Cocatalyst and Electron-Hole Medium in CeO2 QDs/Ag/Ag2Se Z-scheme Heterojunction Enhanced the Photo-Electrocatalytic Properties of the Photoelectrode

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 253 ◽  
Author(s):  
Lingwei Li ◽  
Hange Feng ◽  
Xiaofan Wei ◽  
Kun Jiang ◽  
Shaolin Xue ◽  
...  
Keyword(s):  
High Speed ◽  
Oxygen Vacancies ◽  
Photocatalytic Performance ◽  
Interfacial Region ◽  
Photogenerated Carrier ◽  
Electron Hole ◽  
Carrier Recombination ◽  
Photocatalytic System ◽  
Nano Channel ◽  
Active Substances

A recyclable photoelectrode with high degradation capability for organic pollutants is crucial for environmental protection and, in this work, a novel CeO2 quantum dot (QDs)/Ag2Se Z-scheme photoelectrode boasting increased visible light absorption and fast separation and transfer of photo-induced carriers is prepared and demonstrated. A higher voltage increases the photocurrent and 95.8% of tetracycline (TC) is degraded by 10% CeO2 QDs/Ag2Se in 75 minutes. The degradation rate is superior to that achieved by photocatalysis (92.3% of TC in 90 min) or electrocatalysis (27.7% of TC in 90 min). Oxygen vacancies on the CeO2 QDs advance the separation and transfer of photogenerated carriers at the interfacial region. Free radical capture tests demonstrate that •O2−, •OH, and h+ are the principal active substances and, by also considering the bandgaps of CeO2 QDs and Ag2Se, the photocatalytic mechanism of CeO2 QDs/Ag2Se abides by the Z-scheme rather than the traditional heterojunction scheme. A small amount of metallic Ag formed in the photocatalysis process can form a high-speed charge transfer nano channel, which can greatly inhibit the photogenerated carrier recombination, improve the photocatalytic performance, and help form a steady Z-scheme photocatalysis system. This study would lay a foundation for the design of a Z-scheme solar photocatalytic system.

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