Oxygen vacancy induced superior visible-light-driven photo-catalytic performance in the BiOCl homojunction

2020 ◽  
Vol 4 (8) ◽  
pp. 2314-2324 ◽  
Author(s):  
Siying Niu ◽  
Ruoyu Zhang ◽  
Chongfeng Guo
Keyword(s):  
Oxygen Vacancy ◽  
Visible Light ◽  
Oxygen Vacancies ◽  
Catalytic Performance ◽  
Catalytic Degradation ◽  
Electron Hole ◽  
Effective Separation ◽  
Visible Light Driven

The black BiOCl homojunction with oxygen vacancies has a wide absorption range and results in effective separation of photo-generated electron–hole pairs, which contribute to its superior visible-light-driven photo-catalytic degradation and disinfection ability.

Efficient Degradation of Atrazine by Magnetic CoFe2O4/g-C3N4 Catalyzed Peroxymonosulfate and Its Enhancement of Photocatalytic Ability Under Visible-Light

2019 ◽  
Vol 11 (12) ◽  
pp. 1764-1772 ◽  
Author(s):  
Ji-Bin An ◽  
Dai-Peng Hu ◽  
Yan-Lin Li ◽  
Na-Li Chen
Keyword(s):  
Visible Light ◽  
Environmental Remediation ◽  
Catalytic Performance ◽  
Catalyst Loading ◽  
X Ray Diffraction ◽  
Electron Hole ◽  
Photocatalytic Ability ◽  
Water Matrix ◽  
Visible Light Driven ◽  
Calcination Method

The Magnetic photocatalytic cobalt ferrite/graphitic-carbon nitride (CoFe2O4/g-C3N4) composites with enhanced photocatalytic activity were successfully fabricated through a simple calcination method. Scanning electron microscopy, powder X-ray diffraction, and infrared spectroscopy were applied to characterize the samples. The photocatalytic behavior of CoFe2O4/g-C3N4 was assessed by degradation of atrazine in photo Fenton-like system under visible light irradiation. The results showed that CoFe2O4/g-C3N4 with 2.0 gL–1 catalyst loading in the presence of 1 mM peroxymonosulfate (PMS) exhibited the best catalytic performance, and more than 97% of atrazine was destructed in 12 min. This enhancement could be attributed to the synergistic effect between CoFe2O4 and g-C3N4 promoting longer lifetime of separated electron–hole pairs derived from the formation of the heterojunction between CoFe2O4 and g-C3N4. This could enhance the composite-mediated activation of PMS for the visible-light driven degradation of atrazine. Moreover, the quenching tests showed that sulfate radicals were responsible for the atrazine degradation. CoFe2O4/g-C3N4 composites have strong magnetic ability, thus their recovery from water could be readily achieved by applying external magnetic field. This study demonstrates reasonable performance of the PMS/CoFe2O4/g-C3N4 system in water matrix as potentially important candidate for environmental remediation.

Porous oxygen vacancy-rich V2O5 nanosheets as superior semiconducting supports of nonprecious metal nanoparticles for efficient on-demand H2 evolution from ammonia borane under visible light irradiation

2019 ◽  
Vol 7 (17) ◽  
pp. 10543-10551 ◽  
Author(s):  
Jin Song ◽  
Xiaojun Gu ◽  
Yaduo Cao ◽  
Hao Zhang
Keyword(s):  
Oxygen Vacancy ◽  
Visible Light ◽  
Metal Nanoparticles ◽  
Visible Light Irradiation ◽  
Oxygen Vacancies ◽  
Ammonia Borane ◽  
H2 Evolution ◽  
On Demand ◽  
Visible Light Driven ◽  
Nonprecious Metal

Porous post-modified V2O5 nanosheets with rich oxygen vacancies are superior semiconducting supports of nonprecious metal nanoparticles for efficient visible-light-driven H2 evolution from aqueous NH3BH3 at 298 K.

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