scholarly journals Hydrothermal synthesis of cotton-based BiVO4/Ag composite for photocatalytic degradation of C.I. Reactive Black 5

RSC Advances ◽  
2020 ◽  
Vol 10 (64) ◽  
pp. 39295-39303
Author(s):  
Jiangang Qu ◽  
Jiaqi Qian ◽  
Mengtao Wu ◽  
Qinghui Mao ◽  
Min Li
Keyword(s):  
Composite Material ◽  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Photocatalytic Degradation ◽  
Reactive Black 5 ◽  
Photodegradation Mechanism ◽  
Excellent Photocatalytic Activity

BiVO4/Ag/cotton-K composite material exhibited excellent photocatalytic activity and recyclability, and the photodegradation mechanism of RB5 by BiVO4/Ag/cotton-K was also proposed.

In situ anion exchange synthesis of In2S3/In(OH)3 heterostructures for efficient photocatalytic degradation of MO under solar light

2017 ◽  
Vol 41 (8) ◽  
pp. 3134-3142 ◽  
Author(s):  
Zheng Qiao ◽  
Tingjiang Yan ◽  
Wenjuan Li ◽  
Baibiao Huang
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Exchange Reaction ◽  
Anion Exchange ◽  
Hydrothermal Process ◽  
Solar Light ◽  
Excellent Photocatalytic Activity ◽  
Anion Exchange Reaction

In2S3/In(OH)3 heterostructures which were synthesized via an in situ anion exchange reaction and the hydrothermal process displayed excellent photocatalytic activity compared to pure components and the reported In2S3/In2O3.

scholarly journals Facile Synthesis of “Boron-Doped” Carbon Dots and Their Application in Visible-Light-Driven Photocatalytic Degradation of Organic Dyes

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1560 ◽  
Author(s):  
Zhili Peng ◽  
Yiqun Zhou ◽  
Chunyu Ji ◽  
Joel Pardo ◽  
Keenan J. Mintz ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Carbon Dots ◽  
Organic Dyes ◽  
Dye Degradation ◽  
Average Diameter ◽  
Spherical Particles ◽  
Promising Alternative ◽  
Excellent Photocatalytic Activity ◽  
Doped Carbon Dots

Carbon dots (C-dots) were facilely fabricated via a hydrothermal method and fully characterized. Our study shows that the as-synthesized C-dots are nontoxic, negatively charged spherical particles (average diameter 4.7 nm) with excellent water dispersion ability. Furthermore, the C-dots have a rich presence of surface functionalities such as hydroxyls and carboxyls as well as amines. The significance of the C-dots as highly efficient photocatalysts for rhodamine B (RhB) and methylene blue (MB) degradation was explored. The C-dots demonstrate excellent photocatalytic activity, achieving 100% of RhB and MB degradation within 170 min. The degradation rate constants for RhB and MB were 1.8 × 10−2 and 2.4 × 10−2 min−1, respectively. The photocatalytic degradation performances of the C-dots are comparable to those metal-based photocatalysts and generally better than previously reported C-dots photocatalysts. Collectively considering the excellent photocatalytic activity toward organic dye degradation, as well as the fact that they are facilely synthesized with no need of further doping, compositing, and tedious purification and separation, the C-dots fabricated in this work are demonstrated to be a promising alternative for pollutant degradation and environment protection.

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 Fast photocatalytic degradation of dyes using low-power laser-fabricated Cu2O–Cu nanocomposites

RSC Advances ◽  
2018 ◽  
Vol 8 (36) ◽  
pp. 20277-20286 ◽  
Author(s):  
Shengling Li ◽  
Qingxia Lin ◽  
Xianhua Liu ◽  
Li Yang ◽  
Jie Ding ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Low Power ◽  
Photocatalytic Degradation ◽  
Power Laser ◽  
Facile Synthesis ◽  
Degradation Of Dyes ◽  
Excellent Photocatalytic Activity

Facile synthesis of Cu2O–Cu nanocomposites by using a low-power CO2laser was realized, and the fabricated nanomaterials showed excellent photocatalytic activity for the degradation of various dyes.

Effect of Microwave-Hydrothermal Synthesis on Tin (II) Oxide Properties

2015 ◽  
Vol 1085 ◽  
pp. 187-191
Author(s):  
Аlina A. Pichugina ◽  
Svetlana A. Kuznetsova
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Methyl Orange ◽  
Surface Morphology ◽  
Photocatalytic Degradation ◽  
Pore Volume ◽  
Hydrothermal Processing ◽  
Sorption Activity ◽  
Microwave Hydrothermal ◽  
Degradation Of Methyl Orange

The article demonstrates how time and speed of pressure growth in the course of microwave-hydrothermal processing affect surface morphology and photocatalytic activity of tin (II) oxide. The experiment proved that the materials’ pore size and pore volume influenced their sorption activity and the speed of photocatalytic degradation of methyl orange.

scholarly journals Kinetics and Mechanism of Aniline and Chloroanilines Degradation Photocatalyzed by Halloysite-TiO2 and Halloysite-Fe2O3 Nanocomposites

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1548
Author(s):  
Beata Szczepanik ◽  
Piotr Słomkiewicz ◽  
Dariusz Wideł ◽  
Marianna Czaplicka ◽  
Laura Frydel
Keyword(s):  
Mass Spectrometry ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Adsorption Equilibrium ◽  
Equilibrium Constants ◽  
First Order ◽  
Photodegradation Rate ◽  
Photodegradation Mechanism ◽  
Kinetics Of ◽  
Commercial Tio2

The kinetics of photocatalytic degradation of aniline, 2-chloroaniline, and 2,6-dichloroaniline in the presence of halloysite-TiO2 and halloysite-Fe2O3 nanocomposites, halloysite containing naturally dispersed TiO2, Fe2O3, commercial TiO2, P25, and α-Fe2O3 photocatalysts, were investigated with two approaches: the Langmuir–Hinshelwood and first-order equations. Adsorption equilibrium constants and adsorption enthalpies, photodegradation rate constants, and activation energies for photocatalytic degradation were calculated for all studied amines photodegradation. The photodegradation mechanism was proposed according to organic intermediates identified by mass spectrometry and electrophoresis methods. Based on experimental results, it can be concluded that after 300 min of irradiation, aniline, 2-chloro-, and 2,6-dichloroaniline were completely degraded in the presence of used photocatalysts. Research results allowed us to conclude that higher adsorption capacity and immobilization of TiO2 and Fe2O3 on the halloysite surface in the case of halloysite-TiO2 and halloysite-Fe2O3 nanocomposites significantly increases photocatalytic activity of these materials in comparison to the commercial photocatalyst: TiO2, Fe2O3, and P25.

scholarly journals Preparation of Dual Z-Scheme Bi2MoO6/ZnSnO3/ZnO Heterostructure Photocatalyst for Efficient Visible Light Degradation of Organic Pollutants

2021 ◽  
Author(s):  
Yuanyingxue Gao ◽  
Li Li ◽  
Wenlin Zu ◽  
Yingru Sun ◽  
Jiahui Guan ◽  
...  
Keyword(s):  
Composite Material ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Crystal Violet ◽  
Photoelectron Spectroscopy ◽  
Heterogeneous Structure ◽  
Photoluminescence Intensity ◽  
X Ray ◽  
Cubic Structure

Abstract An important means of achieving efficient charge separation and improving photocatalytic activity is the construction of heterostructures. In this study, the Bi2MoO6/ZnSnO3/ZnO heterostructure photocatalyst was synthesized by the hydrothermal method. The synthesized samples were carefully examined by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HR-TEM), photoluminescence (PL), and other analytical techniques. Meanwhile, the photocatalytic performance was further evaluated by multi-mode photocatalytic degradation with crystal violet (CV). The results show that the composite material has a relatively homogeneous cubic structure in size and shape. In the cubic structure, a heterogeneous structure exists between Bi2MoO6, ZnSnO3 and ZnO. Simultaneously, the dramatic changes in physical morphology, such as the specific surface area and particle size of the composites, led to a unique set of properties, such as a significant climb in light absorption properties and superior photocatalytic activity. In addition, the Bi2MoO6/ZnSnO3/ZnO composite material shows lower photoluminescence intensity, smaller arc radius, and stronger photocurrent response compared to ZnO, Bi2MoO6 and ZnSnO3/ZnO. Meanwhile, Bi2MoO6/ZnSnO3/ZnO shows higher photocatalytic efficiency for crystal violet (CV) and tetracycline hydrochloride (TC) and maintains good stability after 3 cycles of photodegradation experiments. Based on experimental results, the existence of heterojunctions between ZnO, ZnSnO3 and Bi2MoO6 and the possible photocatalytic mechanism for the degradation of crystal violet by dual Z-scheme composites are proposed. In conclusion, this study provides a feasible strategy for the photocatalytic degradation of organic pollutants by introducing ZnSnO3 and Bi2MoO6 to successfully construct composite catalysts with dual Z-scheme heterostructures.

Graphene oxide coated coordination polymer nanobelt composite material: a new type of visible light active and highly efficient photocatalyst for Cr(vi) reduction

2015 ◽  
Vol 44 (24) ◽  
pp. 11155-11164 ◽  
Author(s):  
Gui-Mei Shi ◽  
Bin Zhang ◽  
Xin-Xin Xu ◽  
Yan-Hong Fu
Keyword(s):  
Composite Material ◽  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Coordination Polymer ◽  
Visible Light ◽  
Highly Efficient ◽  
Excellent Photocatalytic Activity ◽  
Visible Light Active ◽  
New Type

GO/CPNB was fabricated successfully, which displays excellent photocatalytic activity in visible light. Furthermore, the influence of GO on photocatalytic activity is discussed.

Synthesis of MoS2/SrTiO3 composite materials for enhanced photocatalytic activity under UV irradiation

2015 ◽  
Vol 3 (2) ◽  
pp. 706-712 ◽  
Author(s):  
Jiahui Liu ◽  
Li Zhang ◽  
Naixu Li ◽  
Qingwen Tian ◽  
Jiancheng Zhou ◽  
...  
Keyword(s):  
Composite Material ◽  
Photocatalytic Activity ◽  
Composite Materials ◽  
Uv Irradiation ◽  
Degradation Rate ◽  
Excellent Photocatalytic Activity

A novel composite material MoS2/SrTiO3 can show the excellent photocatalytic activity with the degradation rate as high as 99.81%.

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