scholarly journals A new Bi-based visible-light-sensitive photocatalyst BiLa1.4Ca0.6O4.2: crystal structure, optical property and photocatalytic activity

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
WenWu Zhong ◽  
YanFang Lou ◽  
ShiFeng Jin ◽  
WenJun Wang ◽  
LiWei Guo
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Optical Property ◽  
Visible Light

Novel plate-stratiform nanostructured Bi12O17Cl2 with visible-light photocatalytic performance

2016 ◽  
Vol 31 (1) ◽  
pp. 2-7 ◽  
Author(s):  
Mei Zhao ◽  
Lifeng Dong ◽  
Qian Zhang ◽  
Hongzhou Dong ◽  
Chengdong Li ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Band Gap Energy ◽  
Gap Energy ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Visible Light Photocatalytic ◽  
Excellent Photostability

Novel plate-stratiform nanostructured Bi12O17Cl2 was studied with its visible-light photocatalytic performance. The Bi12O17Cl2 photocatalyst synthesized by a solid-state reaction was constructed of dozens of primary nanosheets, which were stacked by a parallel array of ultrathin secondary nanosheets. The microstructure and crystal structure of Bi12O17Cl2 primary and secondary nanosheets were discovered by high-resolution transmission electron microscopy and selected-area electron diffraction analyses. Its absorption edge was determined as about 590 nm and the band gap energy was 2.1 eV. The Bi12O17Cl2 nanomaterial exhibited superior visible-light-responsive photocatalytic activity and confirmed successful photodegradation of methyl orange (MO) under visible-light irradiation. The degradation efficiency was up to 97% in 90 min. Furthermore, the Bi12O17Cl2 photocatalyst exhibited excellent photostability and high mineralization capacity for MO photodegradation reaction. The MO photodegradation process was dominated by the direct photocatalytic mechanism. The contribution from its morphology and microstructure to superior photocatalytic activity was discussed.

Enhanced Photocatalytic Activity of GO-Ag@CoCN Composite for RhB Degradation under Visible Light Irradiation

2021 ◽  
Vol 1027 ◽  
pp. 76-80
Author(s):  
Meng Fan Ma ◽  
Ling Fang Qiu ◽  
Ping Li ◽  
Shu Wang Duo
Keyword(s):  
Photocatalytic Activity ◽  
Optical Property ◽  
Visible Light ◽  
Ag Nanoparticles ◽  
Separation Efficiency ◽  
Light Illumination ◽  
Electron Hole ◽  
Heterojunction Structure ◽  
Visible Light Illumination ◽  
Spr Effect

Ag nanoparticles and GO co-modified Co-g-C3N4 composites were prepared successfully. The visible-light adsorption of the optimized GO-Ag@Co-g-C3N4 was improved significantly by the SPR effect of Ag nanoparticles, and the separation efficiency of photo-induced electron-hole pairs of g-C3N4 was accelerated to a large extent by the heterojunction structure of the composite and the superior conductivity of GO. The optimized GO-Ag@CoCN showed promising degradation efficiency for RhB (10 mg/L) under visible light illumination (λ>420 nm) for 160 min, which was 130% and 16.5% higher than the performance using bare g-C3N4 and optimized Ag@Co-g-C3N4, respectively. This work provided a novel way for improving the optical property and photocatalytic activity of g-C3N4.

scholarly journals Facile Synthesis of N-Doped BiOCl Photocatalyst by an Ethylenediamine-Assisted Hydrothermal Method

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Guihua Chen ◽  
Gangling Chen ◽  
Yong Wang ◽  
Qingfeng Wang ◽  
Zhen Zhang
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Rhodamine B ◽  
Facile Synthesis ◽  
Nitrogen Doped ◽  
Tetragonal Crystal ◽  
Tetragonal Crystal Structure ◽  
The Stability

A nitrogen doped BiOCl (N-BiOCl) photocatalyst was synthesized and characterized using an ethylenediamine-assisted hydrothermal method. The N-BiOCl sample demonstrated the same tetragonal crystal structure as the as-prepared pure BiOCl sample. SEM results indicated that N-BiOCl sample was self-assembled by nanoplates to provide an aggregated flower-like microstructure. Doped nitrogen was substituted for oxygen in the crystal lattice of BiOCl, causing a red shift for N-BiOCl sample compared to BiOCl sample. The N-BiOCl sample exhibited higher photocatalytic activity in the degradation of Rhodamine B under visible light than observed in BiOCl sample, and the stability of the sample was verified. Meanwhile, speculative causes for the enhancement in the photocatalytic activity of N-BiOCl sample were also proposed.

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