In situ synthesis of hierarchical nitrogen-doped MoS2 microsphere with an excellent visible light-driven photocatalytic nitrogen fixation ability

2020 ◽  
Vol 13 (05) ◽  
pp. 2051031
Author(s):  
Abulikemu Abulizi ◽  
Hujiabudula Maimaitizi ◽  
Dilinuer Talifu ◽  
Yalkunjan Tursun
Keyword(s):  
Visible Light ◽  
High Performance ◽  
Nucleation Site ◽  
Active Species ◽  
Nitrogen Doped ◽  
Photogenerated Electrons ◽  
The Hierarchical Structure ◽  
Visible Light Driven

A photocatalyst of high-performance hierarchical nitrogen-doped MoS2 (N-MoS2) microsphere was fabricated by an in situ hydrothermal method in the presence of cetyltrimethylammonium bromide (CTAB). The as-prepared N-MoS2 microsphere was self-assembled by extremely thin interleaving petals, where CTAB acts as a nucleation site for the formation of the interleaving petals due to the strong interaction between CTA+ and [Formula: see text]. N-MoS2 showed higher N2 fixation ability (101.2 [Formula: see text] mol/g(cat)h) than the non-doped MoS2 under the visible light irradiation, and the improved photocatalytic activity could be ascribed to that the doped N narrows the band gap, and the surface reflecting and scattering effect caused by the hierarchical structure enhance the light adsorption. The trapping experiment of active species was also investigated to evaluate the role of photogenerated electrons in the photocatalytic reaction process. Meanwhile, the possible mechanism for the formation and excellent photocatalytic performance of N-MoS2 microsphere were also presented.

In situ nitrogen-doped hollow-TiO2/g-C3N4 composite photocatalysts with efficient charge separation boosting water reduction under visible light

2017 ◽  
Vol 5 (20) ◽  
pp. 9671-9681 ◽  
Author(s):  
Xiaowei Shi ◽  
Mamoru Fujitsuka ◽  
Zaizhu Lou ◽  
Peng Zhang ◽  
Tetsuro Majima
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Alternative Energy ◽  
Energy Utilization ◽  
Nitrogen Doped ◽  
Composite Photocatalysts ◽  
Earth Abundant ◽  
Efficient Charge ◽  
Visible Light Driven

The visible-light-driven water splitting process is highly attractive for alternative energy utilization, while developing efficient, earth-abundant, and environmentally friendly photocatalysts for the hydrogen evolution reaction has remained a major challenge.

High-Performance Visible-Light-Driven SnS2/SnO2 Nanocomposite Photocatalyst Prepared via In situ Hydrothermal Oxidation of SnS2 Nanoparticles

2011 ◽  
Vol 3 (5) ◽  
pp. 1528-1537 ◽  
Author(s):  
Yong Cai Zhang ◽  
Zhen Ni Du ◽  
Kun Wei Li ◽  
Ming Zhang ◽  
Dionysios D. Dionysiou
Keyword(s):  
Visible Light ◽  
High Performance ◽  
Hydrothermal Oxidation ◽  
Visible Light Driven

Three-dimensional Gd-doped TiO2 fibrous photoelectrodes for efficient visible light-driven photocatalytic performance

RSC Advances ◽  
2014 ◽  
Vol 4 (23) ◽  
pp. 11750-11757 ◽  
Author(s):  
Junghyun Choi ◽  
P. Sudhagar ◽  
P. Lakshmipathiraj ◽  
Jung Woo Lee ◽  
Anitha Devadoss ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Three Dimensional ◽  
Electrode Geometry ◽  
Doped Tio2 ◽  
Visible Light Driven

Demonstration of the role of electrode geometry on in situ Gd-doping and their effects in the photocatalytic activity.

scholarly journals Ag2WO4 nanorods decorated with AgI nanoparticles: Novel and efficient visible-light-driven photocatalysts for the degradation of water pollutants

2018 ◽  
Vol 9 ◽  
pp. 1308-1316 ◽  
Author(s):  
Shijie Li ◽  
Shiwei Hu ◽  
Wei Jiang ◽  
Yanping Liu ◽  
Yu Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
High Performance ◽  
Separation Efficiency ◽  
Environmental Issues ◽  
Active Species ◽  
Charge Carriers ◽  
Pollutant Degradation ◽  
Absorption Properties ◽  
Simple Preparation ◽  
Visible Light Driven

To develop efficient and stable visible-light-driven (VLD) photocatalysts for pollutant degradation, we synthesized novel heterojunction photocatalysts comprised of AgI nanoparticle-decorated Ag2WO4 nanorods via a facile method. Various characterization techniques, including XRD, SEM, TEM, EDX, and UV–vis DRS were used to investigate the morphology and optical properties of the as-prepared AgI/Ag2WO4 catalyst. With AgI acting as the cocatalyst, the resulting AgI/Ag2WO4 heterostructure shows excellent performance in degrading toxic, stable pollutants such as rhodamine B (RhB), methyl orange (MO) and para-chlorophenol (4-CP). The high performance is attributed to the enhanced visible-light absorption properties and the promoted separation efficiency of charge carriers through the formation of the heterojunction between AgI and Ag2WO4. Additionally, AgI/Ag2WO4 exhibits durable stability. The active species trapping experiment reveals that active species (O2 •− and h+) dominantly contribute to RhB degradation. The AgI/Ag2WO4 heterojunction photocatalyst characterized in this work holds great potential for remedying environmental issues due to its simple preparation method and excellent photocatalytic performance.

scholarly journals Facile Fabrication of Flower-Like BiOI/BiOCOOH p–n Heterojunctions for Highly Efficient Visible-Light-Driven Photocatalytic Removal of Harmful Antibiotics

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1571 ◽  
Author(s):  
Shijie Li ◽  
Bing Xue ◽  
Chunchun Wang ◽  
Wei Jiang ◽  
Shiwei Hu ◽  
...  
Keyword(s):  
Visible Light ◽  
Environmental Remediation ◽  
Exchange Process ◽  
Active Species ◽  
Excellent Performance ◽  
Photocatalytic Removal ◽  
Visible Light Driven ◽  
Facile Fabrication ◽  
Antibiotic Degradation

Novel heterojunction photocatalysts with remarkable photocatalytic capabilities and durability for degrading recalcitrant contaminants are extremely desired; however, their development still remains quite challenging. In this study, a series of flower-like BiOI/BiOCOOH p–n heterojunctions were fabricated via a controlled in situ anion-exchange process. During the process, BiOI formation and even deposition on BiOCOOH microspheres with tight interfacial contact were realized. As expected, BiOI/BiOCOOH heterojunctions revealed remarkable enhancements in photocatalytic antibiotic degradation capacities under visible light irradiation compared with pristine BiOI and BiOCOOH. The best-performing BiOI/BiOCOOH heterojunction (i.e., IBOCH-2) showed much improved photocatalytic CIP degradation efficiency of approximately 81- and 3.9-fold greater than those of bare BiOI and BiOCOOH, respectively. The eminent photocatalytic performances were due not only to the enhanced capability in harvesting photon energies in visible light regions, but also the accelerated separation of electrons and holes boosted by the p–n heterojunction. Active species trapping tests demonstrated that superoxide free radicals (•O2−) and photo-generated holes (h+) were major active species for CIP degradation. Recycling experiments verified the good durability of BIBO-2 over four runs. The facile in situ synthesis route and excellent performance endow flower-like BiOI/BiOCOOH heterojunctions with a promising potential for actual environmental remediation.

scholarly journals Peroxymonosulfate Activation on a Hybrid Material of Conjugated PVC and TiO2 Nanotubes for Enhancing Degradation of Rhodamine B under Visible Light

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
La Phan Phuong Ha ◽  
Tran Hong Huy ◽  
Pham Huu Huan ◽  
Nguyen Thi Minh Thu ◽  
Cao Minh Thi ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
High Performance ◽  
Energy Use ◽  
Minimum Energy ◽  
Active Species ◽  
High Concentration ◽  
Visible Light Driven ◽  
Negative Effect ◽  
Photocatalytic Reactions

Visible-light-driven photocatalysis is a robust technology for amending the negative effect of pollutants on the environment with a minimum energy use. Herein, we describe a simple approach to producing such a photocatalyst by coupling conjugated polyvinyl chloride (cPVC) with the TiO2 nanotube (TNT) thermolysis method. By activating peroxymonosulfate (PMS) to make a cPVC/TNT/PMS system using visible light as the source, we obtain a significant enhancement in the photocatalytic performance. We show that PMS use at a concentration of 3 mM can fully degrade rhodamine B (RhB) solution at a remarkably high concentration (200 mg L-1) just in 120 min under visible light. The cPVC/TNT/PMS system also shows excellent stability in recycling tests for at least five times. Further, by confining the active species in photocatalytic reactions, we report a thorough understanding of the extent of involvement from those radicals. Our work presents a robust approach to make a high-performance, visible-light-driven photocatalyst, which can be potentially used in practice.

Role of in Situ Resultant H2O2 in the Visible-Light-Driven Photocatalytic Inactivation of E. coli Using Natural Sphalerite: A Genetic Study

2015 ◽  
Vol 119 (7) ◽  
pp. 3104-3111 ◽  
Author(s):  
Huixian Shi ◽  
Guocheng Huang ◽  
Dehua Xia ◽  
Tsz Wai Ng ◽  
Ho Yin Yip ◽  
...  
Keyword(s):  
Visible Light ◽  
Genetic Study ◽  
E Coli ◽  
Photocatalytic Inactivation ◽  
Visible Light Driven
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