scholarly journals Photocatalytic Activity of Nanosized Cadmium Sulfides Synthesized by Complex Compound Thermolysis

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Yingchun Yu ◽  
Youxian Ding ◽  
Shengli Zuo ◽  
Jianjun Liu
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Ir Spectra ◽  
Photocatalytic Degradation ◽  
Complex Compound ◽  
Rhodamine B ◽  
Molar Ratio ◽  
Cubic Phase ◽  
Phase Structures ◽  
Degradation Activity

The nanosized cadmium sulfides (CdSs) containing different phase structures were synthesized via the complex compound thermolysis method using different molar ratio of thiourea to acetate cadmium (S/Cd) and characterized by XRD, TEM, UV-Vis, and IR spectra. The results of photocatalytic degradation of rhodamine B (RB) show that the activity order of CdS concerning the phase compositions is of cubic>hexagonal>cubic + hexagonal, where the CdS with the cubic phase has the best photocatalytic degradation activity of RB due to its larger abilities of adsorption and absorbance and smaller particle size of about 10∼13 nm.

scholarly journals PREPARATION OF CUPROUS OXIDE NANOPARTICLES USING ASCORBIC ACID AS A REDUCING AGENT AND ITS PHOTOCATALYTIC ACTIVITY

2019 ◽  
Vol 128 (1D) ◽  
Author(s):  
Dang Xuan Du ◽  
Pham Thi Giang Anh
Keyword(s):  
Particle Size ◽  
Ascorbic Acid ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Cuprous Oxide ◽  
Reducing Agent ◽  
Degradation Ratio ◽  
Ft Ir ◽  
Acid Reduction

<p>In this present paper, cuprous (Cu<sub>2</sub>O) nanoparticles were successfully fabricated by using ascorbic acid as a reducing agent. The purity and characteristics of Cu<sub>2</sub>O nanoparticles were determined by XRD and FT-IR methods. The morphology and particle size of the material were determined by SEM, TEM, respectively. The results showed that the concentration of sodium hydroxide was effective in the morphology and particle size of the material. Furthermore, the Cu<sub>2</sub>O nanoparticles with particle size of 70-80 nm exhibited a good photocatalytic activity on photodegradtion of Rhodamine B by visible light, and the photocatalytic degradation ratio of Rhodamine B attained to 70%.</p><p>Keywords: couprous nanoparticles, ascorbic-acid reduction, photocatalytic degradation, photocatalytic activity, Rhodamine B.</p>

scholarly journals Synthesis and photocatalytic degradation ability evaluation for rhodamine B of ZnO@SiO2 composite with flower-like structure

2019 ◽  
Vol 80 (10) ◽  
pp. 1986-1995 ◽  
Author(s):  
Xiaoyi Shen ◽  
Youjiang Shi ◽  
Hongmei Shao ◽  
Yan Liu ◽  
Yuchun Zhai
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Ph Value ◽  
Molar Ratio ◽  
Sio2 Particles ◽  
Zno Powder ◽  
Degradation Ability ◽  
Homogeneous Film ◽  
Ability Evaluation

Abstract ZnO@SiO2 composite with flower-like structure was successfully prepared with molar ratio of ZnO/SiO2 = 1:1 based on the optimized synthesizing parameters of spherical SiO2 and flower-like ZnO. SiO2 particles were coated on the flower-like ZnO to form a homogeneous film through the multidimensional polycondensation of Si(OH)4. The photocatalytic degradation ability of ZnO@SiO2 composite for rhodamine B (RhB) obtained at different ZnO/SiO2 molar ratio and the comparison to that of flower-like ZnO showed that ZnO@SiO2 composite with ZnO/SiO2 molar ratio of 1:1 displayed a relatively good photocatalytic degradation ability to degrade RhB, but it was weaker than that of flower-like ZnO. Twenty millilitres of RhB solution at a concentration of 15 mg·L−1 could be completely degraded by 300 mg flower-like ZnO powder within 3 h, while the degrading efficiency was only 82.5% by 300 mg ZnO@SiO2 composite. But ZnO@SiO2 composite showed a better photocatalytic activity than flower-like ZnO at a lower pH value of 4.5.

2D/2D BiOBr/(001)-TiO2 heterojunction toward enhanced photocatalytic degradation activity of Rhodamine B

2021 ◽  
pp. 161064
Author(s):  
Lingfu Yang ◽  
Jin Chen ◽  
Xinwei Liu ◽  
Meidan Que ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Activity

scholarly journals Copper oxide supported on graphene for phodegradation of rhodamine B

2015 ◽  
Vol 11 (4) ◽  
Author(s):  
Nurul Sahida Hassan ◽  
Nurul Jamilah Roslani ◽  
Aishah Abdul Jalil ◽  
Sugeng Triwahyono ◽  
Nur Fatien Salleh ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Copper Oxide ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Industrial Wastewater ◽  
Water Contamination ◽  
X Ray Diffraction ◽  
Composite Photocatalyst ◽  
X Ray ◽  
First Order

In recent years, dyes are one of the major sources of the water contamination that lead to environmental problems. For instance, Rhodamine B (RhB) which was extensively used as a colorant in textile industries is toxic and carcinogenic. Among many techniques, photocatalytic degradation become the promising one to remove those dyes from industrial wastewater. Recently, graphene has shown outstanding performance in this application due to its intrinsic electron delocalisation which promotes electron transport between composite photocatalyst and pollutant molecules. While, copper oxide (CuO) is well-known has a lower bandgap energies compared to other semiconductors. Therefore, in this study, copper oxide supported on graphene (CuO/G) was prepared and its photocatalytic activity was tested on degradation of RhB. The catalysts were characterized by X-Ray Diffraction (XRD) and Fourier Transform Infrared (FTIR) Spectroscopy. The results showed that the interaction between copper and graphene support could enhance the photocatalytic activity. The 5 wt% CuO/G was found to give the highest degradation (95%) of 10 mg L-1 of RhB solution at pH 7 using 1 g L-1 catalyst after 4 hours under visible light irradiation. The photodegradation followed the pseudo first-order Langmuir-Hinshelwood kinetic model. This study demonstrated that the CuO/G has a potential to be used in photocatalytic degradation of various organic pollutants.

Selective fluorescent sensing and photocatalytic properties of three MOFs based on naphthalene-1,4-dicarboxylic acid and 2,4,5-tri(4-pyridyl)-imidazole

2018 ◽  
Vol 42 (5) ◽  
pp. 3551-3559 ◽  
Author(s):  
Jun-Jie Wang ◽  
Ren-Chun Zhang ◽  
Ya-Li Cao ◽  
Yan-Ang Li ◽  
Yi-Ran Wang ◽  
...  
Keyword(s):  
Dicarboxylic Acid ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
High Sensitivity ◽  
Photocatalytic Properties ◽  
Luminescent Probes ◽  
Fluorescent Sensing ◽  
Degradation Activity

Three MOFs display high sensitivity in the detection of NB and Ca2+ or Co2+ ions as luminescent probes. Moreover, 3 exhibits a relatively good photocatalytic degradation activity of rhodamine B.

scholarly journals Copper-nanoparticle-dispersed amorphous BaTiO3 thin films as hole-trapping centers: enhanced photocatalytic activity and stability

RSC Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 5045-5052 ◽  
Author(s):  
Su-Wei Zhang ◽  
Shun Li ◽  
Bo-Ping Zhang ◽  
Dongfang Yu ◽  
Zuotai Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Copper Nanoparticle ◽  
Photoelectrochemical Performance ◽  
Hole Trapping ◽  
Degradation Activity ◽  
Trapping Centers

The photocatalytic degradation activity and photoelectrochemical performance of amorphous BaTiO3 films can be improved after introducing Cu NPs, and the oxidation of Cu is strongly hindered when dispersing in the amorphous BaTiO3 films that serve as h+-trapping centers.

scholarly journals BiOCl/TiO2/diatomite composites with enhanced visible-light photocatalytic activity for the degradation of rhodamine B

2019 ◽  
Vol 10 ◽  
pp. 1412-1422 ◽  
Author(s):  
Minlin Ao ◽  
Kun Liu ◽  
Xuekun Tang ◽  
Zishun Li ◽  
Qian Peng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Light Irradiation ◽  
Molar Ratio ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

A BiOCl/TiO2/diatomite (BTD) composite was synthesized via a modified sol–gel method and precipitation/calcination method for application as a photocatalyst and shows promise for degradation of organic pollutants in wastewater upon visible-light irradiation. In the composite, diatomite was used as a carrier to support a layer of titanium dioxide (TiO2) nanoparticles and bismuth oxychloride (BiOCl) nanosheets. The results show that TiO2 nanoparticles and BiOCl nanosheets uniformly cover the surface of diatomite and bring TiO2 and BiOCl into close proximity. Rhodamine B was used as the target degradation product and visible light (λ > 400 nm) was used as the light source for the evaluation of the photocatalytic properties of the prepared BTD composite. The results show that the catalytic performance of the BTD composite under visible-light irradiation is much higher than that of TiO2 or BiOCl alone. When the molar ratio of BiOCl to TiO2 is 1:1 and the calcination temperature is 400 °C, the composite was found to exhibit the best catalytic effect. Through the study of the photocatalytic mechanism, it is shown that the strong visible-light photocatalytic activity of the BTD composite results mainly from the quick migration of photoelectrons from the conduction band of TiO2/diatomite to the surface of BiOCl, which promotes the separation effect and reduces the recombination rate of the photoelectron–hole pair. Due to the excellent catalytic performance, the BTD composite shows great potential for wide application in the field of sewage treatment driven by solar energy.

Synthesis of a g-C3N4-sensitized and NaNbO3-substrated II-type heterojunction with enhanced photocatalytic degradation activity

CrystEngComm ◽  
2015 ◽  
Vol 17 (24) ◽  
pp. 4575-4583 ◽  
Author(s):  
Song Chengjie ◽  
Fan Mingshan ◽  
Hu Bo ◽  
Chen Tianjun ◽  
Wang Liping ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Degradation Activity

A g-C3N4-sensitized and NaNbO3-substrated II-type heterojunction with enhanced photocatalytic activity was synthesized.

Preparation of Bi1-xLaxVO4 and its Photocatalytic Degradation on Rhodamine B

2016 ◽  
Vol 852 ◽  
pp. 1473-1476
Author(s):  
Yan Ding ◽  
Liang Fang Fu ◽  
Yu Huan Wang ◽  
Liang Chao Li ◽  
Juan Bi Li
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Rate ◽  
Light Sensitivity ◽  
Structure Morphology ◽  
Photocatalytic Activities ◽  
Testing Techniques ◽  
Composition Structure

A series of photocatalyst Bi1-xLaxVO4 (0.1, 0.3, 0.5, 0.7) powders were prepared by hydrothermal method. The composition, structure, morphology and photocatalytic activity of the samples were researched by means of modern testing techniques. Bi1-xLaxVO4 showed excellent visible-light sensitivity and photocatalytic activities. The degradation rate of sample with x = 0.5 on rhodamine B reached 90 %, which was much higher than that of pure BiVO4.

Photocatalytic Activity of Transition Metal Doped Strontium Titanate Nanomaterial

2013 ◽  
Vol 700 ◽  
pp. 71-74
Author(s):  
Rui Ma ◽  
Wen Jie Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Strontium Titanate ◽  
Degradation Rate ◽  
Sol Gel ◽  
Slight Variation ◽  
Photocatalytic Activities ◽  
Method Effects ◽  
Degradation Activity ◽  
Metal Doped

Ce, Nd and Gd doped strontium titanate nanomaterial was prepared by a sol-gel method. Effects of transition metals doping on photocatalytic activities of the prepared materials were studied. The pure strontium titanate had photocatalytic degradation activity of 31.0%. The maximum degradation rate happened at Ce content of 20% and nearly 32.5% of the initial methyl orange was degraded on the material after 30 min of irradiation. Although there was a slight variation of photocatalytic degradation rate with the increasing Nd doping content, the materials doped with Nd had lower photocatalytic activity compared with pure strontium titanate. Nearly all the samples doped with Gd in the range up to 30% had much lower activity that the pure strontium titanate.

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