scholarly journals Novel Bi3O5I2 Hollow Microsphere and Its Enhanced Photocatalytic Activity

Catalysts ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 709 ◽  
Author(s):  
Baoyin Cui ◽  
Haitao Cui ◽  
Zhenrong Li ◽  
Hongyu Dong ◽  
Xin Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photoelectric Property ◽  
Organic Pollutant ◽  
Hollow Microsphere ◽  
Active Species ◽  
Characterization Methods ◽  
Simulated Solar Light ◽  
Solar Light Irradiation ◽  
New Type ◽  
Promising Application

A new type of I-deficient bismuth oxyiodide Bi3O5I2 with a hollow morphology was prepared by the solvothermal process. The structure, composition, morphology, optical property and photoelectric property of the as prepared photocatalyst were investigated through some characterization methods. Those characterization results showed that Bi3O5I2 displayed a larger specific surface area, promising band structure and lower recombination of photoinduced carriers than pure BiOI. Bi3O5I2 had a higher photocatalytic activity than BiOI on the decomposition of methyl orange (MO) under simulated solar light irradiation. The superoxide (·O2−) and hole (h+) were the dominating active species during the degradation of MO. Its stability and reusability performance showed its great promising application in the degradation of organic pollutant.

Fabrication of N-doped Reduced Graphene Oxide/Ag3PO4 Nanocomposite with Excellent Photocatalytic Activity for the Degradation of Organic Pollutants

NANO ◽  
2017 ◽  
Vol 12 (01) ◽  
pp. 1750013 ◽  
Author(s):  
Longhai Feng ◽  
Lirong Kong ◽  
Zhenyuan Ji ◽  
Yi Wang ◽  
Xiaoping Shen ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Photocatalytic Performance ◽  
Organic Pollutant ◽  
Charge Carriers ◽  
Simulated Solar Light ◽  
Solar Light Irradiation ◽  
Reduced Graphene ◽  
Excellent Photocatalytic Activity

An efficient N-doped reduced graphene oxide (N-RGO)/Ag3PO4 nanocomposite with enhanced photocatalytic activity has been prepared through a facile solution-based approach. Since N-RGO could offer more sites for the anchoring of Ag3PO4 nanoparticles, and effectively promote the charge carriers separation and transfer due to its high electrical conductivity, the photocatalytic activity of N-RGO/Ag3PO4 nanocomposite is much higher than bare Ag3PO4 and N-RGO in the degradation of phenol pollutant under simulated solar light irradiation. The mechanism for the photocatalytic process was also investigated. The excellent photocatalytic performance makes the N-RGO/Ag3PO4 nanocomposite a promising photocatalyst for organic pollutant treatment.

scholarly journals Innovative Low-Cost Carbon/ZnO Hybrid Materials with Enhanced Photocatalytic Activity towards Organic Pollutant Dyes’ Removal

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1873
Author(s):  
Petronela Pascariu ◽  
Niculae Olaru ◽  
Aurelian Rotaru ◽  
Anton Airinei
Keyword(s):  
Photocatalytic Activity ◽  
Hybrid Materials ◽  
Raw Materials ◽  
Structural Characteristics ◽  
Low Cost ◽  
Organic Pollutant ◽  
Zno Nanostructures ◽  
Zno Nanocrystals ◽  
Electrospinning Method ◽  
New Type

A new type of material based on carbon/ZnO nanostructures that possesses both adsorption and photocatalytic properties was obtained in three stages: cellulose acetate butyrate (CAB) microfiber mats prepared by the electrospinning method, ZnO nanostructures growth by dipping and hydrothermal methods, and finally thermal calcination at 600 °C in N2 for 30 min. X-ray diffraction (XRD) confirmed the structural characteristics. It was found that ZnO possesses a hexagonal wurtzite crystalline structure. The ZnO nanocrystals with star-like and nanorod shapes were evidenced by scanning electron microscopy (SEM) measurements. A significant decrease in Eg value was found for carbon/ZnO hybrid materials (2.51 eV) as compared to ZnO nanostructures (3.21 eV). The photocatalytic activity was evaluated by studying the degradation of three dyes, Methylene Blue (MB), Rhodamine B (RhB) and Congo Red (CR) under visible-light irradiation. Therefore, the maximum color removal efficiency (both adsorption and photocatalytic processes) was: 97.97% of MB (C0 = 10 mg/L), 98.34% of RhB (C0 = 5 mg/L), and 91.93% of CR (C0 = 10 mg/L). Moreover, the value of the rate constant (k) was found to be 0.29 × 10−2 min−1. The novelty of this study relies on obtaining new photocatalysts based on carbon/ZnO using cheap and accessible raw materials, and low-cost preparation techniques.

Nonmetal–metal–semiconductor-promoted P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with superior photocatalytic activity and stability

2015 ◽  
Vol 3 (34) ◽  
pp. 17858-17865 ◽  
Author(s):  
Xiaohong Hu ◽  
Qi Zhu ◽  
Xinlong Wang ◽  
Naoki Kawazoe ◽  
Yingnan Yang
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Light Irradiation ◽  
Solar Light ◽  
Tio2 Photocatalyst ◽  
Photocatalytic Ability ◽  
Composite Photocatalyst ◽  
Gel Method ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

P/Ag/Ag2O/Ag3PO4/TiO2 composite photocatalyst has been successfully prepared by a sol–gel method. It shows highly enhanced photocatalytic ability and stability under simulated solar light irradiation.

Photocatalytic activity of TiO2-coated glass raschig rings on the degradation of phenolic derivatives under simulated solar light irradiation

2013 ◽  
Vol 224 ◽  
pp. 32-38 ◽  
Author(s):  
Maria J. Sampaio ◽  
Cláudia G. Silva ◽  
Adrián M.T. Silva ◽  
Vitor J.P. Vilar ◽  
Rui A.R. Boaventura ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Light Irradiation ◽  
Solar Light ◽  
Coated Glass ◽  
Simulated Solar Light ◽  
Solar Light Irradiation ◽  
Phenolic Derivatives

Flower-like MWCNTs/Bi2O2CO3 composites with enhanced photocatalytic activity under simulated solar light irradiation

2016 ◽  
Vol 185 ◽  
pp. 50-53 ◽  
Author(s):  
Xin Zhang ◽  
Shijie Li ◽  
Shiwei Hu ◽  
Jialin Chen ◽  
Wei Jiang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Light Irradiation ◽  
Solar Light ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

Facile synthesis of meso-porous ZnO nano-triangular prisms with enhanced photocatalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 30120-30124 ◽  
Author(s):  
K. Vignesh ◽  
Sora Kang ◽  
Byeong Sub Kwak ◽  
Misook Kang
Keyword(s):  
Photocatalytic Activity ◽  
Transfer Process ◽  
Light Irradiation ◽  
Solar Light ◽  
Schematic Diagram ◽  
Facile Synthesis ◽  
Electron Hole ◽  
Hole Transfer ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

A schematic diagram of the electron–hole transfer process in ZnO-nt under simulated solar light irradiation.

scholarly journals Perovskite-structured CaTiO3 coupled with g-C3N4 as a heterojunction photocatalyst for organic pollutant degradation

2018 ◽  
Vol 9 ◽  
pp. 671-685 ◽  
Author(s):  
Ashish Kumar ◽  
Christian Schuerings ◽  
Suneel Kumar ◽  
Ajay Kumar ◽  
Venkata Krishnan
Keyword(s):  
Photocatalytic Activity ◽  
Organic Pollutant ◽  
Visible Region ◽  
Active Species ◽  
Sunlight Irradiation ◽  
Organic Pollutant Degradation ◽  
Mixing Method ◽  
Plausible Mechanism ◽  
Uv Visible ◽  
Degradation Of Pollutants

A novel graphitic carbon nitride (g-C3N4)–CaTiO3 (CTCN) organic–inorganic heterojunction photocatalyst was synthesized by a facile mixing method, resulting in the deposition of CaTiO3 (CT) nanoflakes onto the surface of g-C3N4 nanosheets. The photocatalytic activity of the as-synthesized heterojunction (along with the controls) was evaluated by studying the degradation of an aqueous solution of rhodamine B (RhB) under UV, visible and natural sunlight irradiation. The CTCN heterojunction with 1:1 ratio of g-C3N4/CT showed the highest photocatalytic activity under sunlight irradiation and was also demonstrated to be effective for the degradation of a colorless, non-photosensitizing pollutant, bisphenol A (BPA). The superior photocatalytic performance of the CTCN heterojunction could be attributed to the appropriate band positions, close interfacial contact between the constituents and extended light absorption (both UV and visible region), all of which greatly facilitate the transfer of photogenerated charges across the heterojunction and inhibit their fast recombination. In addition, the two-dimensional (2D) morphology of g-C3N4nanosheets and CT nanoflakes provides enough reaction sites due to their larger surface area and enhances the overall photocatalytic activity. Furthermore, the active species trapping experiments validate the major role played by superoxide radicals (O2 −•) in the degradation of pollutants. Based on scavenger studies and theoretically calculated band positions, a plausible mechanism for the photocatalytic degradation of pollutants has been proposed and discussed.

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