scholarly journals Controllable Fabrication of Ordered Mesoporous Bi2WO6and Its High Photocatalytic Activity under Visible Light

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Xueming Dang ◽  
Xiaoli Dong ◽  
Hua Wang ◽  
Xiufang Zhang ◽  
Hongchao Ma ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Surface Reaction ◽  
Mesoporous Structure ◽  
High Photocatalytic Activity ◽  
Charge Carriers ◽  
Photocatalytic Ability ◽  
Ordered Mesoporous ◽  
Harvesting Efficiency ◽  
Controllable Fabrication

Ordered mesoporous Bi2WO6was fabricated by nanocasting technique using SBA-15 as the template. The effect of the dosage of SBA-15 on the formation of the ordered structure and the photocatalytic ability of mesoporous Bi2WO6was discussed. It was confirmed that the ordered mesoporous structure was obtained as the dosage of SBA-15 was 0.3 g. It was found that, compared to Bi2WO6, the RhB degradation rate with ordered mesoporous Bi2WO6was enhanced under visible light (λ>400 nm) by the photocatalytic measurements. The enhanced photocatalytic performance of ordered mesoporous Bi2WO6was attributed to its particular ordered mesoporous structure which could increase the light-harvesting efficiency, reduce the recombination of the photogenerated charge carriers, and promote the surface reaction.

scholarly journals Controllable fabrication of Bi2O3/TiO2 heterojunction with excellent visible-light responsive photocatalytic performance

2017 ◽  
Vol 423 ◽  
pp. 119-130 ◽  
Author(s):  
Yunfang Huang ◽  
Yuelin Wei ◽  
Jing Wang ◽  
Dan Luo ◽  
Leqing Fan ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Controllable Fabrication

The Synthesis of CuS Hexagonal Nanosheet-Graphene for Use as a High Performance Photocatalyst

NANO ◽  
2016 ◽  
Vol 11 (05) ◽  
pp. 1650054 ◽  
Author(s):  
Bin Zeng ◽  
Yang Yin
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
High Performance ◽  
Organic Pollutant ◽  
High Photocatalytic Activity ◽  
Charge Carriers ◽  
Thermal Method ◽  
One Pot ◽  
Graphene Nanocomposites ◽  
Excellent Photocatalytic Activity

CuS hexagonal nanosheet/graphene was fabricated by a facile one-pot microwave-thermal method. The samples possess excellent photocatalytic activity for degradation of organic pollutant under visible light. The high photocatalytic activity was attributed to the deposition of CuS hexagonal nanosheet onto graphene. CuS nanosheet serves as a transporter which efficiently inhibits the recombination of the photo-induced charge carriers in the nanocomposites. The developed method demonstrates a facile approach towards the synthesis of two-dimensional semiconductor-graphene nanocomposites with excellent photocatalytic performance under visible light.

Highly ordered mesoporous BiVO4: Controllable ordering degree and super photocatalytic ability under visible light

2013 ◽  
Vol 173 ◽  
pp. 175-180 ◽  
Author(s):  
Xiufang Zhang ◽  
Lulu Du ◽  
Hua Wang ◽  
Xiaoli Dong ◽  
Xinxin Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Ability ◽  
Ordered Mesoporous ◽  
Ordering Degree

Preparation of p-p heterojunction and its photocatalytic performance by 3D NiS supported by 2D lamellar CuMn-LDO

2021 ◽  
Author(s):  
Ye Liu ◽  
Jing Xu ◽  
Zhenlu Liu ◽  
Xinyu Liu ◽  
Shengming Xu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
High Photocatalytic Activity

Ni-based nanomaterials have attracted extensive concern as photocatalysts thanks to their high photocatalytic activity and non-toxicity. In this study, a novel visible light induced photocatalyst CuMn-LDO/NiS (CMS) was successfully synthesized...

scholarly journals Facile Synthesis Bi2Te3 Based Nanocomposites: Strategies for Enhancing Charge Carrier Separation to Improve Photocatalytic Activity

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3390
Author(s):  
Di Wu ◽  
Jun Guo ◽  
Zhen-Hua Ge ◽  
Jing Feng
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Charge Carriers ◽  
Core Shell ◽  
Facile Synthesis ◽  
Shell Nanostructures ◽  
Carrier Separation ◽  
The Stability ◽  
Nanocomposite Powders ◽  
Decomposition Efficiency

Varying structure Bi2Te3-based nanocomposite powders including pure Bi2Te3, Bi2Te3/Bi core−shell, and Bi2Te3/AgBiTe2 heterostructure were synthesized by hydrothermal synthesis using Bi2S3 as the template and hydrazine as the reductant. Successful realization of Bi2Te3-based nanostructures were concluded from XRD, FESEM, and TEM. In this work, the improvement in the performance of the rhodamine B (RhB) decomposition efficiency under visible light was discussed. The Bi2Te3/AgBiTe2 heterostructures revealed propitious photocatalytic performance ca. 90% after 60 min. The performance was over Bi2Te3/Bi core-shell nanostructures (ca. 40%) and more, exceeding pure Bi2Te3 (ca. 5%). The reason could be scrutinized in terms of the heterojunction structure, improving the interfacial contact between Bi2Te3 and AgBiTe2 and enabling retardation in the recombination rate of the photogenerated charge carriers. A credible mechanism of the charge transfer process in the Bi2Te3/AgBiTe2 heterostructures for the decomposition of an aqueous solution of RhB was also explicated. In addition, this work also investigated the stability and recyclability of a Bi2Te3/AgBiTe2 heterojunction nanostructure photocatalyst. In addition, this paper anticipates that the results possess broad potential in the photocatalysis field for the design of a visible light functional and reusable heterojunction nanostructure photocatalyst.

Enhanced Ciprofloxacin Degradation Over Pt@BaZrO3/g-C3N4 Heterojunctions Beneath Visible Light Illumination

2020 ◽  
Vol 12 (7) ◽  
pp. 874-884
Author(s):  
Maha Alhaddad
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Charge Carriers ◽  
Superior Performance ◽  
Photocatalytic Decomposition ◽  
Light Illumination ◽  
Great Ability ◽  
Visible Light Illumination ◽  
Essential Parameter

In this investigation, various proportions of Pt@BaZrO3 (at 1∼4 wt.%) accommodating 2.0 wt% Pt were adopted to establish Pt@BaZrO3/g-C3N4 nanocomposites of improved photocatalytic performance. H2PtCl6 nanoparticles as well as mesoporous BaZrO3 and g-C3N4 were utilized to develop the prescribed nanocomposites via sonication-mixture routine. The photocatalytic achievement for the upgraded Pt@BaZrO3/g-C3N4 nanocomposites beneath visible light irradiation were tested by examining ciprofloxacin (CIP) degradation. Enhanced charge transfer and retarded charges’ recombination were established amid Pt, BaZrO3 NPs and g-C3N4 nanosheets in the developed heterojunctions. The proportion (wt.%) of Pt@BaZrO3 was found to be an essential parameter in governing the photocatalytic efficacy of the promoted Pt@BaZrO3/g-C3N4 nanocomposites. Moreover, complete photocatalytic decomposition of CIP was established over Pt@BaZrO3/g-C3N4 nanocomposite, accommodating 3 wt.% Pt@BaZrO3 NPs. Such superior performance was correlated to the great ability of the Pt@BaZrO3/g-C3N4 to absorb visible light in addition to the prolonged charge separation amid the photo-induced charge carriers.

Extremely Effective Visible Light-Driven Generation of Hydrogen by Sol–Gel LaFeO3-Decorated g-C3N4 Photocatalyst

2020 ◽  
Vol 12 (11) ◽  
pp. 1255-1264
Author(s):  
Nada D. Al-Khthami ◽  
Mohammed Alsawat ◽  
Reda M. Mohamed ◽  
Yousef G. Alghamdi ◽  
Zaki I. Zaki
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Mesoporous Structure ◽  
Basic Material ◽  
Photocatalytic Ability ◽  
Visible Light Driven ◽  
Variable Content

In order to create a new design for an efficient photocatalyst, you need to decrease the obtained band gap and isolate the charge carriers photogenerated while setting up a new visible light methodology. The latter option could be accomplished via combination of catalyst in the metal oxide form over the surface of semiconductor. Hence, the current work aimed at synthesizing a new nanocomposite material from LaFeO3/g-C3N4 through the use of mesoporous silica as a template processing g-C3N4 higher surface area, which was subsequently decorated with LaFeO3. The LaFeO3 of variable content of 1∼4% was used to decorate our targeted basic material. The structure was confirmed by ordinary techniques, in addition to photocatalytic ability via splitting water reaction. g-C3N4 and LaFeO3 photocatalytic efficiencies were compared to the newly developed LaFeO3/g-C3N4 nanocomposites showing their outstanding activity. The optimum LaFeO3 content was confirmed as 3%, which gave higher photocatalytic efficiency against both g-C3N4 and LaFeO3 (34 and 21 times respectively). To enhance the catalytic system efficiency, a scavenger with a positive hole was added as glycerol. A maximum of five runs of higher efficient reuse was examined as required, as well as stable nanocomposite photocatalyst. The mesoporous structure, high surface area, and capacity of charge separation over the photocatalysis process were all investigated as main conditions which affect photocatalytic activity of LaFeO3/g-C3N4 nanocomposites.

Heterostructured g-C3N4/Ag–TiO2 composites with efficient photocatalytic performance under visible-light irradiation

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 56136-56144 ◽  
Author(s):  
Mengqiao Zang ◽  
Lei Shi ◽  
Lin Liang ◽  
Defeng Li ◽  
Jianmin Sun
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Synergistic Effects ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Enhanced Absorption ◽  
Efficient Separation ◽  
Photogenerated Electrons

The heterostructured g-C3N4/Ag–TiO2 composites exhibited high photocatalytic activity, which was attributed to the synergistic effects of the enhanced absorption of visible light and the efficient separation rates for photogenerated electrons-holes.

scholarly journals Visible Light Photocatalysis via CdS/TiO2Nanocomposite Materials

2006 ◽  
Vol 2006 ◽  
pp. 1-7 ◽  
Author(s):  
Sesha S. Srinivasan ◽  
Jeremy Wade ◽  
Elias K. Stefanakos
Keyword(s):  
Visible Light ◽  
Organic Compounds ◽  
Photocatalytic Performance ◽  
Selective Reduction ◽  
Charge Carriers ◽  
Visible Light Photocatalysis ◽  
Water Suspension ◽  
The Past ◽  
Systematic Synthesis ◽  
High Redox Potential

Nanostructured colloidal semiconductors with heterogeneous photocatalytic behavior have drawn considerable attention over the past few years. This is due to their large surface area, high redox potential of the photogenerated charge carriers, and selective reduction/oxidation of different classes of organic compounds. In the present paper, we have carried out a systematic synthesis of nanostructured CdS-TiO2via reverse micelle process. The structural and microstructural characterizations of the as-prepared CdS-TiO2nanocomposites are determined using XRD and SEM-EDS techniques. The visible light assisted photocatalytic performance is monitored by means of degradation of phenol in water suspension.

Tuning of the photocatalytic performance of g-C3N4 by polyoxometalates under visible light

2017 ◽  
Vol 46 (46) ◽  
pp. 16019-16024 ◽  
Author(s):  
Gang Yan ◽  
Xiaojia Feng ◽  
Liguang Xiao ◽  
Wenguang Xi ◽  
Huaqiao Tan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Spatial Separation ◽  
High Photocatalytic Activity ◽  
Electron Traps ◽  
Photogenerated Electrons

Polyoxometalate/g-C3N4 composites were prepared with Keggin POMs and g-C3N4. POMs used as electron traps can efficiently promote the spatial separation of photogenerated electrons and holes of C3N4, which resulted in a high photocatalytic activity towards MO degradation.

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