Hierarchical Z-scheme 1D/2D architecture with TiO2 nanowires decorated by MnO2 nanosheets for efficient adsorption and full spectrum photocatalytic degradation of organic pollutants

2020 ◽  
Vol 10 (11) ◽  
pp. 3603-3612
Author(s):  
Jiejing Zhang ◽  
Yajie Hu ◽  
Hong Zheng ◽  
Pengyi Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Organic Pollutant ◽  
Pollutant Removal ◽  
Tio2 Nanowires ◽  
Full Spectrum ◽  
Mno2 Nanosheets ◽  
Excellent Stability

A novel hierarchical 1D/2D TiO2/MnO2 composite shows superior adsorption, full spectrum photocatalytic activity and excellent stability for organic pollutant removal.

scholarly journals Magnetic Field-Assisted Photocatalytic Degradation of Organic Pollutants over Bi1−xRxFeO3 (R = Ce, Tb; x = 0.00, 0.05, 0.10 and 0.15) Nanostructures

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4079
Author(s):  
Radhalayam Dhanalakshmi ◽  
Nambi Venkatesan Giridharan ◽  
Juliano C. Denardin
Keyword(s):  
Magnetic Field ◽  
Rare Earth ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Visible Light Irradiation ◽  
Organic Pollutant ◽  
Hydrothermal Process ◽  
Phenol Red ◽  
Magnetic Features

Magnetic-field-accelerated photocatalytic degradation of the phenol red (PR) as a model organic pollutant was studied using rare-earth elements modified BiFeO3 (Bi1−xRxFeO3 (R = Ce, Tb; x = 0.0, 0.05, 0.10 and 0.15); BFO: RE) nanostructures. The nanostructures were prepared via the hydrothermal process and their morphological, structural, functional, optical and magnetic features were investigated in detail. The effect of magnetic fields (MFs) on photocatalysis were examined by applying the different MFs under visible light irradiation. The enhanced photodegradation efficiencies were achieved by increasing the MF up to 0.5T and reduced at 0.7T for the compositions x = 0.10 in both Ce and Tb substituted BFO. Further, mineralization efficiencies of PR, reproducibility of MF-assisted photocatalysis, stability and recyclability of BFO: RE nanostructures were also tested.

Metallic tungsten carbide nanoparticles as a near-infrared-driven photocatalyst

2019 ◽  
Vol 7 (31) ◽  
pp. 18538-18546 ◽  
Author(s):  
Weicheng Huang ◽  
Hongxue Meng ◽  
Yan Gao ◽  
Jinxin Wang ◽  
Chunyu Yang ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Tungsten Carbide ◽  
Organic Pollutants ◽  
Near Infrared ◽  
Photoelectric Conversion ◽  
Full Spectrum ◽  
Lspr Effect

In this study, we present the LSPR effect and full spectrum photoabsorption of metallic WC for the direct NIR-driven photoelectric conversion and photocatalytic degradation of organic pollutants.

Antimony sulphoiodide (SbSI), a narrow band-gap non-oxide ternary semiconductor with efficient photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 105980-105987 ◽  
Author(s):  
Muthusamy Tamilselvan ◽  
Aninda J. Bhattacharyya
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Band Gap ◽  
Organic Pollutants ◽  
Narrow Band ◽  
Electronic Configuration ◽  
Ternary Semiconductor ◽  
Very High

A highly crystalline 3D urchin-shaped SbSI with an ns2 cationic electronic configuration displays very high and efficient photocatalytic degradation of organic pollutants.

scholarly journals Sunlight driven photocatalytic degradation of organic pollutants using a MnV2O6/BiVO4 heterojunction: mechanistic perception and degradation pathways

2021 ◽  
Author(s):  
Karina Bano ◽  
Susheel K. Mittal ◽  
Prit Pal Singh ◽  
Sandeep Kaushal
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Charge Separation ◽  
Effective Charge ◽  
Degradation Pathways ◽  
Heterojunction Structure ◽  
Charge Shift

In the field of photocatalysis, fabrication of a heterojunction structure with effective charge separation at the interface and charge shift to enhance the photocatalytic activity has acquired extensive consideration.

scholarly journals Highly efficient visible light active Cu–ZnO/S-g-C3N4 nanocomposites for efficient photocatalytic degradation of organic pollutants

RSC Advances ◽  
2021 ◽  
Vol 11 (59) ◽  
pp. 37254-37267
Author(s):  
Mohsin Javed ◽  
Muhammad Azam Qamar ◽  
Sammia Shahid ◽  
Hashem O. Alsaab ◽  
Salma Asif
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Light Harvesting ◽  
Highly Efficient ◽  
Visible Light Active

The photocatalytic activity of photocatalyst is severely hampered by limited visible light harvesting and unwanted fast recombination of photogenerated e− and h+.

scholarly journals Photocatalytic Degradation of Nitrobenzene Using Nanocrystalline TiO2 Photocatalyst Doped with Zn Ions

2017 ◽  
Vol 57 (4) ◽  
Author(s):  
Edgar Alonso Reynoso-Soto ◽  
Sergio Pérez-Sicairos ◽  
Ana Patricia Reyes-Cruzaley ◽  
Christian Leonardo Castro-Riquelme ◽  
Rosa María Félix-Navarro ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Rate Constant ◽  
Apparent Rate Constant ◽  
Tio2 Photocatalyst ◽  
New Materials ◽  
Nanocrystalline Tio2 ◽  
New Applications ◽  
Zn Ions

Photocatalysis is a method widely used in the degradation of organic pollutants of the environment. The development of new materials is very important to improve the photocatalytic properties and to find new applications for TiO<sub>2</sub> as a photocatalyst. In this article we reported the synthesis of a photocatalyst based on TiO<sub>2</sub> doped with Zn<sup>2+</sup> ions highly efficient in the degradation of nitrobenzene. The results of photocatalytic activity experiments showed that the Zn<sup>2+</sup> doped TiO<sub>2</sub> is more active than un-doped TiO<sub>2</sub> catalyst with an efficiency of 99% for the nitrobenzene degradation at 120 min with an apparent rate constant of 35 × 10<sup>-3</sup> min<sup>-1</sup>.

scholarly journals Tandem Structures Semiconductors Based on TiO2_SnO2 and ZnO_SnO2 for Photocatalytic Organic Pollutant Removal

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 200
Author(s):  
Alexandru Enesca ◽  
Luminita Isac
Keyword(s):  
Photocatalytic Activity ◽  
Uv Radiation ◽  
Organic Pollutant ◽  
Pollutant Removal ◽  
Photocatalytic Efficiency ◽  
Mass Ratio ◽  
Experimental Conditions ◽  
Kinetic Evaluation ◽  
Tandem Structure ◽  
Main Component

The photocatalyst materials correlation with the radiation scenario and pollutant molecules can have a significant influence on the overall photocatalytic efficiency. This work aims to outline the significance of optimizing the components mass ratio into a tandem structure in order to increase the photocatalytic activity toward pollutant removal. ZnO_SnO2 and TiO2_SnO2 tandem structures were obtained by the doctor blade technique using different mass ratios between the components. The samples contain metal oxides with crystalline structures and the morphology is influenced by the main component. The photocatalytic activity was tested using three radiation scenarios (UV, UV-Vis, and Vis) and two pollutant molecules (tartrazine and acetamiprid). The results indicate that the photocatalytic activity of the tandem structures is influenced by the radiation wavelength and pollutant molecule. The TiO2_SnO2 exhibit 90% photocatalytic efficiency under UV radiation in the presence of tartrazine, while ZnO_SnO2 exhibit 73% photocatalytic efficiency in the same experimental conditions. The kinetic evaluation indicate that ZnO_SnO2 (2:1) have a higher reaction rate comparing with TiO2_SnO2 (1:2) under UV radiation in the presence of acetamiprid.

scholarly journals One-Dimensional Nanostructured TiO2for Photocatalytic Degradation of Organic Pollutants in Wastewater

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Ting Feng ◽  
Gen Sheng Feng ◽  
Lei Yan ◽  
Jia Hong Pan
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Photocatalytic Oxidation ◽  
Sol Gel ◽  
Chemical Vapor ◽  
Inorganic Element ◽  
One Dimensional ◽  
Practical Applications ◽  
Excellent Photocatalytic Activity

The present paper reviews the progress in the synthesis of one-dimensional (1D) TiO2nanostructures and their environmental applications in the removal of organic pollutants. According to the shape, 1D TiO2nanostructures can be divided into nanorods, nanotubes, nanowires/nanofibers, and nanobelts. Each of them can be synthesized via different technologies, such as sol-gel template method, chemical vapor deposition, and hydrothermal method. These methods are discussed in this paper, and the recent development of the synthesis technologies is also presented. Furthermore, the organic pollutants, degradation using the synthesized 1D TiO2nanostructures is studied as an important application of photocatalytic oxidation (PCO). The 1D nanostructured TiO2exhibited excellent photocatalytic activity in a PCO process, and the mechanism of photocatalytic degradation of organic pollutants is also discussed. Moreover, the modification of 1D TiO2nanostructures using metal ions, metal oxide, or inorganic element can further enhance the photocatalytic activity of the photocatalyst. This phenomenon can be explained by the suppression of e−-h+pairs recombination rate, increased specific surface area, and reduction of band gap. In addition, 1D nanostructured TiO2can be further constructed as a film or membrane, which may extend its practical applications.

scholarly journals Biochar Nanoparticles over TiO2 Nanotube Arrays: A Green Co-Catalyst to Boost the Photocatalytic Degradation of Organic Pollutants

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1048
Author(s):  
Marco Pinna ◽  
Gilberto Binda ◽  
Marco Altomare ◽  
Marcello Marelli ◽  
Carlo Dossi ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Uv Light ◽  
Water Solution ◽  
Low Cost ◽  
Organic Pollutant ◽  
Tio2 Nanotube ◽  
Raw Material ◽  
Co Catalysts ◽  
Low Temperature Pyrolysis

Biochar nanoparticles (BC NPs), produced by low temperature pyrolysis (350 °C) of microalgae (Nannochloropsis sp.) and nutshells, are proposed as low-cost and sustainable co-catalysts to promote the photocatalytic activity of TiO2 nanotube (NT) arrays towards the degradation of methylene blue (MB) used as an organic pollutant model molecule. BC NPs (size < 25 nm) were obtained by treating bulk BC (i.e., biomass after pyrolysis) by sonication–centrifugation cycles in a water solution. The filtered BC NPs dispersion was deposited by simple drop-casting on the TiO2 NT support. The BC loading was varied by performing multiple depositions. Photocatalytic experiments under UV light (365 nm) revealed that the decoration with BC NPs significantly improves the TiO2 photoactivity. Such enhancement is mainly influenced by the amount of BC deposited; upon optimizing the BC deposition conditions, the rate of photocatalytic degradation of MB increases approximately three times with respect to bare TiO2, almost irrespective of the nature of the raw material. The greater photocatalytic activity of BC-TiO2 can be attributed to the synergistic combination of reactant/product adsorption and catalytic degradation of the adsorbed organic pollutant, as well as an improved charge carrier separation and electron transfer.

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