scholarly journals Effect of Surface Site Defects on Photocatalytic Properties of BiVO4/TiO2 Heterojunction for Enhanced Methylene Blue Degradation

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Sahar Mansour ◽  
Rym Akkari ◽  
Semy Ben Chaabene ◽  
Mongia Saïd Zina
Keyword(s):  
Methylene Blue ◽  
Anatase Phase ◽  
Synergetic Effect ◽  
Photocatalytic Properties ◽  
Semiconductor Surface ◽  
Hydrothermal Route ◽  
One Pot ◽  
Visible Light Driven ◽  
Hazardous Pollutants ◽  
Light Absorbance

Combining a super photoresponsive BiVO4 catalyst to the large band gap TiO2 material seems to be a great interest in order to improve the visible-light-driven photodegradation of hazardous pollutants. BiVO4/TiO2 heterojunction composites have been synthesized via a simple one-pot hydrothermal route. Herein, we carefully highlighted the effect of BiVO4 content on the physicochemical and photocatalytic properties of solids towards the decomposition of methylene blue (MB) under solar light irradiation. The main results revealed that the formation of the heterostructures catalyst by incorporating BiVO4 into TiO2 stabilizes the anatase phase of TiO2 by inhibiting its crystal growth and improves significantly the light absorbance of titanium dioxide. The results showed that the best photocatalytic performance is assigned to the catalyst with 2 wt% BiVO4 loading which is higher than both pure BiVO4 and TiO2. This improvement of photocatalytic activity is related to the synergetic effect between both materials. Furthermore, the constructed junction leads to an increase in the concentration of oxygen defects on the semiconductor surface which could create an acceptor energy level into the valence band of TiO2. Four cyclic runs for the photocatalytic degradation of MB on BiVO4/TiO2 composite revealed its stability and sustainable reusability.

Visible-light-driven photocatalytic properties of binary MoS2/ZnS heterostructured nanojunctions synthesized via one-step hydrothermal route

2017 ◽  
Vol 41 (9) ◽  
pp. 3432-3442 ◽  
Author(s):  
Mega Joy ◽  
A. Peer Mohamed ◽  
K. G. K. Warrier ◽  
U. S. Hareesh
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Visible Light ◽  
Energy Gap ◽  
Lattice Parameters ◽  
Photocatalytic Properties ◽  
Hydrothermal Route ◽  
Visible Light Driven ◽  
One Step ◽  
Interfacial Charge

The MoS2/ZnS binary heterojunctions obtained by a facile one-step hydrothermal route is competent to retrench the forbidden energy gap by creating sulfur vacancies. The tailoring of the lattice parameters of sulfides for interfacial charge transfer through the heterojunctions enhanced photocatalytic activity.

scholarly journals Fabrication of metal/semiconductor hybrid Ag/AgInO2 nanocomposites with enhanced visible-light-driven photocatalytic properties

RSC Advances ◽  
2017 ◽  
Vol 7 (48) ◽  
pp. 30392-30396 ◽  
Author(s):  
Xiangchao Zhang ◽  
Difa Xu ◽  
Yanrong Jia ◽  
Shiying Zhang
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Properties ◽  
Visible Light Driven ◽  
Hybrid Photocatalyst

A Ag/AgInO2 hybrid photocatalyst was developed to improve the visible-light-driven degradation of methylene blue.

One-pot gamma ray-induced green synthesis of a Prussian blue-laden polyvinylpyrrolidone/reduced graphene oxide aerogel for the removal of hazardous pollutants

2019 ◽  
Vol 7 (4) ◽  
pp. 1737-1748 ◽  
Author(s):  
Ilsong Lee ◽  
Sung-Min Kang ◽  
Sung-Chan Jang ◽  
Go-Woon Lee ◽  
Ha Eun Shim ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Gamma Ray ◽  
Mechanical Stability ◽  
One Pot ◽  
3D Network ◽  
Reduced Graphene ◽  
Reduced Graphene Oxide Aerogel ◽  
Graphene Oxide Aerogel ◽  
Hazardous Pollutants ◽  
High Mechanical Stability

Gamma-ray mediated synthesis of ultra-low dense porous 3D-network structured PB@PVP/rGO aerogel with high mechanical stability for the removal of Cs+ ions, methylene blue and n-hexadecane.

Yolk–shell ZnWO4 microspheres: one-pot synthesis, characterization and photocatalytic properties

CrystEngComm ◽  
2014 ◽  
Vol 16 (48) ◽  
pp. 11035-11041 ◽  
Author(s):  
Miao Wang ◽  
Yanfeng Tang ◽  
Tongming Sun ◽  
Guoqing Jiang ◽  
Yujun Shi
Keyword(s):  
Aspartic Acid ◽  
Chelating Agent ◽  
Photocatalytic Properties ◽  
Hydrothermal Route ◽  
One Pot ◽  
One Pot Synthesis

Novel yolk–shell ZnWO4 microspheres have been synthesized via a mild and one-pot hydrothermal route by using l-aspartic acid as the chelating agent and shape modifier.

Visible light-driven self-powered aptasensors for ultrasensitive Microcystin-LR detection based on the carrier density effect of N-doped graphene hydrogel/hematite Schottky junctions

The Analyst ◽  
2021 ◽  
Vol 146 (20) ◽  
pp. 6220-6227
Author(s):  
Linhua Zhang ◽  
Ding Jiang ◽  
Xueling Shan ◽  
Xiaojiao Du ◽  
Meng Wei ◽  
...  
Keyword(s):  
Visible Light ◽  
Carrier Density ◽  
Density Effect ◽  
Hydrothermal Route ◽  
One Pot ◽  
Visible Light Driven ◽  
Doped Graphene ◽  
Schottky Junctions ◽  
Self Powered

In this work, a novel visible light-driven self-powered photoelectrochemical (PEC) platform was designed based on 3D N-doped graphene hydrogel/hematite nanocomposites (NGH/Fe2O3) via a facile one-pot hydrothermal route.

A 3D 2-fold interpenetrating Cu(II) coordination polymer based on 4,4′-oxybis(benzoic acid) and 1,3-bis(2-methyl-imidazol-1-yl) benzene exhibiting photocatalytic properties

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shan-Bao Qiao
Keyword(s):  
Methylene Blue ◽  
Coordination Polymer ◽  
Benzoic Acid ◽  
Rhodamine B ◽  
Photocatalytic Properties

Abstract A new Cu(II) complex, [Cu2(1,3-BMIB)(OBA)2] n (1) (1,3-BMIB = 1,3-bis(2-methyl-1H-imidazol-1-yl)benzene, H2OBA = 4,4′-oxybis(benzoic acid)) was hydrothermally synthesized and has been structurally characterized. Complex 1 possesses a 3D 2-fold interpenetrating framework based on [Cu(OBA)] n layers with a Schläfli symbol {412.63}. Complex 1 displays excellent photocatalytic properties in the degradation of methylene blue (MB) and rhodamine B (RhB).

scholarly journals Straightforward Synthesis of Mn3O4/ZnO/Eu2O3-Based Ternary Heterostructure Nano-Photocatalyst and Its Application for the Photodegradation of Methyl Orange and Methylene Blue Dyes

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4661
Author(s):  
Jayachamarajapura Pranesh Shubha ◽  
Haralahalli Shivappa Savitha ◽  
Syed Farooq Adil ◽  
Mujeeb Khan ◽  
Mohammad Rafe Hatshan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Irradiation Time ◽  
Solar Irradiation ◽  
Anionic Dyes ◽  
One Pot ◽  
Sunlight Irradiation ◽  
Ft Ir ◽  
Degradation Activity ◽  
Ecological Applications

Zinc oxide-ternary heterostructure Mn3O4/ZnO/Eu2O3 nanocomposites were successfully prepared via waste curd as fuel by a facile one-pot combustion procedure. The fabricated heterostructures were characterized utilizing XRD, UV–Visible, FT-IR, FE-SEM, HRTEM and EDX analysis. The photocatalytic degradation efficacy of the synthesized ternary nanocomposite was evaluated utilizing model organic pollutants of methylene blue (MB) and methyl orange (MO) in water as examples of cationic dyes and anionic dyes, respectively, under natural solar irradiation. The effect of various experimental factors, viz. the effect of a light source, catalyst dosage, irradiation time, pH of dye solution and dye concentration on the photodegradation activity, was systematically studied. The ternary Mn3O4/ZnO/Eu2O3 photocatalyst exhibited excellent MB and MO degradation activity of 98% and 96%, respectively, at 150 min under natural sunlight irradiation. Experiments further conclude that the fabricated nanocomposite exhibits pH-dependent photocatalytic efficacy, and for best results, concentrations of dye and catalysts have to be maintained in a specific range. The prepared photocatalysts are exemplary and could be employed for wastewater handling and several ecological applications.

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