Designed synthesis of a p-Ag2S/n-PDI self-assembled supramolecular heterojunction for enhanced full-spectrum photocatalytic activity

2019 ◽  
Vol 7 (11) ◽  
pp. 6482-6490 ◽  
Author(s):  
Jun Yang ◽  
Hong Miao ◽  
Wenlu Li ◽  
Huiquan Li ◽  
Yongfa Zhu
Keyword(s):  
Photocatalytic Activity ◽  
Electron Hole ◽  
Full Spectrum ◽  
Effective Separation ◽  
Excellent Activity ◽  
Self Assembled ◽  
Designed Synthesis

An efficient full-spectrum responsive p-Ag2S/n-PDI heterojunction was successfully constructed. The excellent activity was mainly attributed to the more effective separation of electron-hole pairs.

Effective charge separation and enhanced photocatalytic activity by the heterointerface in MoS2/reduced graphene oxide composites

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60318-60326 ◽  
Author(s):  
Long Zhang ◽  
Lan Sun ◽  
Shuai Liu ◽  
Yuhong Huang ◽  
Kewei Xu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Charge Separation ◽  
Effective Charge ◽  
Electron Hole ◽  
Effective Separation ◽  
Reduced Graphene ◽  
Oxide Composites

The MoS2/rGO exhibits enhanced photocatalytic activity for degradation of RhB due to effective separation of photo-generated electron–hole pairs by heterointerface.

Synthesis and properties of visible light responsive g-C3N4/Bi2O2CO3 layered heterojunction nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (53) ◽  
pp. 42736-42743 ◽  
Author(s):  
Qian Zhang ◽  
Haoying Wang ◽  
Shaozheng Hu ◽  
Guang Lu ◽  
Jin Bai ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Chemical Structure ◽  
Photogenerated Electron ◽  
Electron Hole ◽  
Effective Separation ◽  
Stable Chemical

A g-C3N4/Bi2O2CO3 layered heterojunction nanocomposite exhibits more effective separation of photogenerated electron–hole pairs and a stable chemical structure, thus showing higher photocatalytic activity and stability.

Synthesis of BiVO4–TiO2–BiVO4three-layer composite photocatalyst: effect of layered heterojunction structure on the enhancement of photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75482-75490 ◽  
Author(s):  
Mingzhu Wang ◽  
Wenjun Li ◽  
Yanjun Zhao ◽  
Shaonan Gu ◽  
Fangzhi Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Photogenerated Electron ◽  
Electron Hole ◽  
Composite Photocatalyst ◽  
Heterojunction Structure ◽  
Effective Separation ◽  
Layer Composite

A BiVO4–TiO2–BiVO4three-layer heterostructure photocatalyst was successfully synthesized, which exhibited enhanced photocatalytic performance with the effective separation of photogenerated electron–hole pairs.

Synthesis of one-dimensional WO3–Bi2WO6 heterojunctions with enhanced photocatalytic activity

CrystEngComm ◽  
2015 ◽  
Vol 17 (3) ◽  
pp. 569-576 ◽  
Author(s):  
Yin Peng ◽  
Qing-Guo Chen ◽  
Dan Wang ◽  
Hai-Yan Zhou ◽  
An-Wu Xu
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Photogenerated Electron ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Solar Light ◽  
Electron Hole ◽  
One Dimensional ◽  
Effective Separation ◽  
Solar Light Irradiation

A one-dimensional WO3–Bi2WO6 photocatalyst exhibits high photocatalytic activity for the degradation of rhodamine B (RhB) under solar light irradiation, which is attributed to the effective separation of photogenerated electron–hole pairs by the staggered band potentials between WO3 and Bi2WO6.

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

Full-spectrum responsive photocatalytic activity via non-noble metal Bi decorated mulberry-like BiVO4

2021 ◽  
Vol 83 ◽  
pp. 102-112
Author(s):  
Yaxin Bi ◽  
Yanling Yang ◽  
Xiao-Lei Shi ◽  
Lei Feng ◽  
Xiaojiang Hou ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Noble Metal ◽  
Full Spectrum

Few-Layered MoS2 Nanostructures for Highly Efficient Visible Light Photocatalysis

NANO ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. 1650114 ◽  
Author(s):  
Dan Li ◽  
Jianwei Li ◽  
Caiqin Han ◽  
Xinsheng Zhao ◽  
Haipeng Chu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Electrochemical Impedance ◽  
X Ray Diffraction ◽  
Electron Hole ◽  
Electrochemical Impedance Spectra ◽  
X Ray ◽  
Transmission Electron ◽  
Electron Hole Pair

Few-layered MoS2 nanostructures were successfully synthesized by a simple hydrothermal method without the addition of any catalysts or surfactants. Their morphology, structure and photocatalytic activity were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, electrochemical impedance spectra and UV-Vis absorption spectroscopy, respectively. These results show that the MoS2 nanostructures synthesized at 180[Formula: see text]C exhibit an optimal visible light photocatalytic activity (99%) in the degradation of Rhodamine B owing to the relatively easier adsorption of pollutants, higher visible light absorption and lower electron–hole pair recombination.

Enhanced visible-active photocatalytic behaviors observed in Mn-doped BiFeO3

2018 ◽  
Vol 32 (17) ◽  
pp. 1850185 ◽  
Author(s):  
Yun-Hui Si ◽  
Yu Xia ◽  
Ya-Yun Li ◽  
Shao-Ke Shang ◽  
Xin-Bo Xiong ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Band Gap ◽  
Diffuse Reflectance Spectroscopy ◽  
X Ray Diffraction ◽  
Electron Hole ◽  
X Ray ◽  
Mn Doped ◽  
Hole Recombination ◽  
Narrow Band Gap Semiconductors

A series of BiFeO3 and BiFe[Formula: see text]Mn[Formula: see text]O3 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.10) were synthesized by a hydrothermal method. The samples were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy (EDS) and UV–Vis diffuse reflectance spectroscopy, and their photocatalytic activity was studied by photocatalytic degradation of methylene blue in aqueous solution under visible light irradiation. The band gap of BiFeO3 was significantly decreased from 2.26 eV to 1.90 eV with the doping of Mn. Furthermore, the 6% Mn-doped BiFeO3 photocatalyst exhibited the best activity with a degradation rate of 94% after irradiation for 100 min. The enhanced photocatalytic activity with Mn doping could be attributed to the enhanced optical absorption, increment of surface reactive sites and reduction of electron–hole recombination. Our results may be conducive to design more efficient photocatalysts responsive to visible light among narrow band gap semiconductors.

First-Principles Study on Electronic and Optical Properties in Pr-Doped Anatase TiO2

2014 ◽  
Vol 924 ◽  
pp. 260-268 ◽  
Author(s):  
Hao Chen ◽  
Lan Fang Yao ◽  
Song Lin Yang ◽  
Ya Qin Wang ◽  
Xing Liang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photocatalytic Activity ◽  
First Principles ◽  
Energy Gap ◽  
Impurity Band ◽  
Anatase Tio2 ◽  
Electron Hole ◽  
Light Region ◽  
Overlap Population ◽  
Calculation Results

The crystal structures, band structures, density of states, charge density, overlap population and optical properties of pure anatase TiO2 and Pr-doped anatase TiO2 were studied by using the plane-wave pseudopotential method based on the first-principles. After Pr doping, the valence band and the conduction band moved down and became dense, energy gap became narrow and a impurity band which consists of Pr 4f states appeared. And the dipole moment got improved, which is good for the separate of the electron-hole pairs. These effectively overcome two huge shortcomings of TiO2. Besides, Pr-doped anatase TiO2 produced more carriers which have good transport properties and the absorption spectra of Pr-O bond appear in the region that the wavelength is longer. The calculation results of optical properties show that the absorption edge occured red shift, which means the photocatalytic activity of anatase TiO2 got remarkable improved during visible-light region. This conforms to the previous analysis. So the photocatalytic activity of anatase TiO2 got remarkable improved after Pr doping.

scholarly journals Construction of full-spectrum-driven Ag–g-C3N4/W18O49 heterojunction catalyst with outstanding N2 photofixation ability

RSC Advances ◽  
2017 ◽  
Vol 7 (68) ◽  
pp. 42997-43004 ◽  
Author(s):  
Hongyu Liang ◽  
Jianzhong Li ◽  
Yanwen Tian
Keyword(s):  
Electron Hole ◽  
Full Spectrum ◽  
Separation Rate ◽  
Light Utilization

Ag–g-C3N4/W18O49 heterojunction catalysts display much higher N2 photofixation performance than that of individual W18O49 or Ag–g-C3N4, which is due to the better separation rate of electron–hole pairs and more efficient light utilization.

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