scholarly journals Visible Light Driven Photocatalytic Decolorization and Disinfection of Water Employing Reduced TiO2 Nanopowders

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 228
Author(s):  
Xiaolan Kang ◽  
Chrysanthi Berberidou ◽  
Augustinas Galeckas ◽  
Calliope Bazioti ◽  
Einar Sagstuen ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Illumination ◽  
Defect Engineering ◽  
Photocatalytic Decolorization ◽  
Bacterial Endospores ◽  
Visible Light Illumination ◽  
Key Characteristics ◽  
Visible Light Driven ◽  
Tio2 Nanopowders ◽  
Extrinsic Defects

Defect-engineering of TiO2 can have a major impact on its photocatalytic properties for the degradation of persisting and non-biodegradable pollutants. Herein, a series of intrinsic and extrinsic defects are induced by post annealing of crystalline TiO2 under different reducing atmospheres. A detailed optoelectronic characterization sheds light on the key characteristics of the defect-engineered TiO2 nanopowders that are linked to the photocatalytic performance of the prepared photocatalysts. The photodegradation of a model dye, malachite green, as well as the inactivation of bacterial endospores of the Geobacillus stearothermophilus species were studied in the presence of the developed catalysts under visible light illumination. Our results indicate that a combination of certain defects is necessary for the improvement of the photocatalytic process for water purification and disinfection under visible light.

Visible-light-driven photocatalytic water oxidation over LaNbON2-LaMg2/3Nb1/3O3 solid solutions

2021 ◽  
Author(s):  
Ran Wang ◽  
Qi Wang ◽  
Jun Qian ◽  
Xiaoxiang Xu
Keyword(s):  
Visible Light ◽  
Solid Solutions ◽  
Water Oxidation ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Visible Light Driven

Solid solutions between LaNbON2 and LaMg2/3Nb1/3O3, i.e. (LaNbON2)1-x(LaMg2/3Nb1/3O3)x (0.0 ≤ x ≤ 1.0) have been investigated as photocatalysts for water oxidation into oxygen under visible light illumination (λ ≥ 420...

Enhanced photocatalytic activity of Eu-doped Bi2S3 nanoflowers for degradation of organic pollutants under visible light illumination

2015 ◽  
Vol 5 (8) ◽  
pp. 4055-4063 ◽  
Author(s):  
Arpita Sarkar ◽  
Abhisek Brata Ghosh ◽  
Namrata Saha ◽  
Amit Kumar Dutta ◽  
Divesh N. Srivastava ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Pollutants ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Visible Light Driven

Eu-doped Bi2S3 nanoflowers possess highly visible light driven photocatalytic activity towards degradation of organic pollutants.

scholarly journals The synthesis of a Bi2MoO6/Bi4V2O11 heterojunction photocatalyst with enhanced visible-light-driven photocatalytic activity

RSC Advances ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 5433-5440 ◽  
Author(s):  
Chol-Nam Ri ◽  
Song-Gol Kim ◽  
Kyong-Sik Ju ◽  
Hyok-Su Ryo ◽  
Chol-Ho Mun ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Visible Light Driven

A Bi2MoO6/Bi4V2O11 heterojunction exhibits remarkably enhanced photocatalytic activity for MB degradation and Cr(vi) reduction under visible-light illumination compared to its pristine samples.

Copper nanoparticles embedded in the triphenylamine functionalized bithiazole–metal complex as active photocatalysts for visible light-driven hydrogen evolution

2015 ◽  
Vol 3 (33) ◽  
pp. 17201-17208 ◽  
Author(s):  
Jingpei Huo ◽  
Heping Zeng
Keyword(s):  
Metal Complex ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Copper Nanoparticles ◽  
Photocatalytic Performance ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Visible Light Driven

An extraordinary nanocomposite 3 (5.0 wt% Cu NPs) has demonstrated significant photocatalytic performance (15.38 mmol h−1 g−1) towards photocatalytic H2 evolution under visible light illumination.

Durable visible light self-cleaning surfaces imparted by TiO2/SiO2/GO photocatalyst

2018 ◽  
Vol 89 (4) ◽  
pp. 517-527 ◽  
Author(s):  
Jing Gao ◽  
Wandi Li ◽  
Xinzhe Zhao ◽  
Lu Wang ◽  
Ning Pan
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Gentian Violet ◽  
Light Illumination ◽  
Step Method ◽  
Stain Removal ◽  
Visible Light Illumination ◽  
Visible Light Driven ◽  
One Step ◽  
Self Cleaning

This research intends to enhance the photocatalytic efficiency and durability of substrates coated with TiO2-based nanocomposites under visible light illumination. More specifically, TiO2/SiO2/graphene oxide nanocomposites are successfully sono-synthesized and sono-fabricated onto a polymeric fabric through a facile one-step method. The morphologies, phase structures and optical properties of the samples are studied. The photocatalytic activity of the functionalized samples is assessed through a gentian violet stain removal test and then photodecomposition of methylene blue under visible light, and tested again after 10 washes to check on its durability. It is corroborated that TiO2/SiO2/graphene oxide nanocomposites have shown significantly better visible light self-cleaning performance than just using the pure TiO2 alone. In addition, even after 10 washes, the samples virtually maintain the functionality. Herein, sono-synthesis of TiO2/SiO2/graphene oxide represents a remarkable step forward in visible light-driven self-cleaning treatment for flexible materials and, hence, holds a great potential for commercialization.

A novel BODIPY-based MOF photocatalyst for efficient visible-light-driven hydrogen evolution

2019 ◽  
Vol 7 (17) ◽  
pp. 10439-10445 ◽  
Author(s):  
Heng Yang ◽  
Jinming Wang ◽  
Ji Ma ◽  
Hong Yang ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Light Illumination ◽  
Co Catalyst ◽  
Visible Light Illumination ◽  
Visible Light Driven

The first BODIPY-based MOF decorated with a Pt co-catalyst exhibited efficient photocatalytic H2 evolution under visible-light illumination, representing the most visible-light photoactive MOF material for H2 evolution from water thus far.

scholarly journals Visible-light-driven H2production and decomposition of 4-nitrophenol over nickel phosphides

RSC Advances ◽  
2018 ◽  
Vol 8 (60) ◽  
pp. 34259-34265 ◽  
Author(s):  
Xing Liu ◽  
Lanhua Zhao ◽  
Haixia Wang ◽  
Hua Lai ◽  
Gang Peng ◽  
...  
Keyword(s):  
Visible Light ◽  
Precipitation Method ◽  
Light Illumination ◽  
Nickel Phosphide ◽  
Eosin Y ◽  
Nickel Phosphides ◽  
Visible Light Illumination ◽  
Visible Light Driven

Amorphous nickel phosphide (Ni2P) was synthesized by a simple precipitation method. The nickel phosphide was used to produce H2from water with Eosin Y as sensitizer and degrade 4-nitrophenol under visible light illumination.

scholarly journals Synthesis of Z-scheme Mn-CdS/MoS2/TiO2 ternary photocatalysts for high-efficiency sunlight-driven photocatalysis

2019 ◽  
Vol 28 ◽  
pp. 2633366X1989502 ◽  
Author(s):  
Hui Feng ◽  
Wenhua Zhou ◽  
Xiangyang Zhang ◽  
Songbai Zhang ◽  
Bo Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
High Efficiency ◽  
Dye Degradation ◽  
Light Illumination ◽  
High Hydrogen ◽  
Photogenerated Electrons ◽  
Visible Light Illumination ◽  
Layer Adsorption ◽  
Visible Light Driven ◽  
Redox Ability

The exploration of highly efficient visible-light-driven photocatalysts for dye degradation has received great concerns in wastewater treatment. Here, molybdenum disulfide (MoS2) and cadmium sulfide–manganese (CdS-Mn) were sequentially assembled onto titanium dioxide (TiO2) nanotube by a simple hydrothermal method coupled with successive ionic layer adsorption and reaction. A zinc sulfide (ZnS) layer was introduced as a potential barrier for performance improvement; the resultant material exhibits prominent visible-light-induced photocatalytic activity in degrading methyl orange (MO) and 9-anthracenecarboxylic acids, which is 3.16-fold, 2.00-fold, and 1.69-fold or 2.86-fold, 1.56-fold, and 1.47-fold of TiO2, MoS2/TiO2, and CdS-Mn/TiO2 systems, respectively. Furthermore, the synthesized ZnS/CdS-Mn/MoS2/TiO2 composite also possesses a high hydrogen production rate of 408.27 mmol/cm2/h out of water under visible light illumination, which is about 30.08 times greater than that of pure TiO2 and 5.18-fold and 2.52-fold of MoS2/TiO2 and CdS-Mn/TiO2, respectively. The enhanced photocatalyst performances are mainly attributed to the synergetic effects of CdS-Mn, MoS2, and TiO2, forming a Z-scheme system in the CdS-Mn/MoS2/TiO2 electrode, which not only accelerates the interfacial charge transfer efficiency but also preserves the strong redox ability of the photogenerated electrons and holes. In addition, the prepared photoelectrode is highly stable and completely recyclable over hydrogen evolution reaction and organic degradation.

Synthesis and Characterization of CuO Rods for Enhanced Visible Light Driven Dye Degradation

2020 ◽  
Vol 20 (12) ◽  
pp. 7716-7723
Author(s):  
Qazi Inamur Rahman ◽  
Arif Ali ◽  
Naseem Ahmad ◽  
Minaxi B. Lohani ◽  
S. K. Mehta ◽  
...  
Keyword(s):  
Visible Light ◽  
Dye Degradation ◽  
Copper Acetate ◽  
Hydrothermal Process ◽  
Light Illumination ◽  
X Ray Diffraction ◽  
X Ray ◽  
Visible Light Illumination ◽  
Visible Light Driven

Here, we report simple and efficient method to synthesize CuO rods using copper acetate, hexamethylenetetramine (HMTA) and sodium hydroxide (NaOH) solutions via hydrothermal process followed by calcination. The Field emission scanning electron microscopy images revealed that synthesized CuO rods were 2–4μm thick with several micrometers long and grown into high density. The as-synthesized CuO rods were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy and Energy dispersive X-ray analysis (EDS) which confirmed the formation of highly crystalline, single phase pure CuO rods with monoclinic structures. The photocatalytic capability of synthesized CuO rods was executed by monitoring the degradation of methylene blue (MB) dye under visible light illumination. The results showed MB dye degraded about ~70% in just 100 min and followed first order reaction kinetics with rate constant k = 0.01123 mint.1 and R2 = 0.9880.

Synthesis of Mo-doped ultrathin BiVO4 nanosheets with efficient visible-light-driven photocatalytic activity

2019 ◽  
Vol 33 (23) ◽  
pp. 1950270 ◽  
Author(s):  
Mengfei Lu ◽  
Qiaoqiao Li ◽  
Chengliang Zhang ◽  
Xiaoxing Fan ◽  
Haifeng Shi
Keyword(s):  
Visible Light ◽  
Active Sites ◽  
Electronic Band Structure ◽  
Light Illumination ◽  
Electronic Band ◽  
Photo Degradation ◽  
Highly Active ◽  
Visible Light Illumination ◽  
Visible Light Driven ◽  
Photoinduced Charge

In this study, a series of molybdenum-doped ultrathin BiVO4 nanosheets (Mo-BVO) were successfully synthesized by a facile hydrothermal method. The results indicated that Mo-BVO nanosheets exhibited high photocatalytic efficiency of methyl blue (MB) degradation under visible-light irradiation. Particularly, 1% Mo-BVO exhibited an optimum photo-degradation rate of more than 97% within 60 min under visible-light illumination, which was approximately 3.8 times greater than that of pure BVO. The experimental characterizations and DFT calculations manifested that the ultrathin BVO nanosheets and Mo doping were beneficial to provide abundant active sites, suppress the photoinduced charge recombination and extend the absorption visible-light range, thus enhancing the photocatalytic performance toward MB degradation. Additionally, the photocatalytic reaction mechanism was proposed based on the reactive species trapping experiments. This study was expected to design a highly active photocatalyst for pollution decomposition by modulating the photocatalytic properties and electronic band structure.

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