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>

Preparation of Nanometer Sized Cuprous Oxide and its Photocatalytic Performance over Four Nitrophenol

2013 ◽  
Vol 333-335 ◽  
pp. 1853-1856
Author(s):  
Yu Liang
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Small Particle ◽  
Cuprous Oxide ◽  
Photocatalytic Performance ◽  
Reducing Agent ◽  
Spectral Features ◽  
Small Particle Size ◽  
Traditional Methods ◽  
Excellent Photocatalytic Activity

Nanometer sized Cu2O is synthesised by nucleation crystallization separation and redox methods, with NaBH4 as reducing agent. It takes several researching methods, such as XRD,SEM,EDS and UV-vis, etc, to study the structure, composition and spectral features of the product. The results show that, comparing with traditional methods, the Cu2O particles produced by nucleation crystallization separation and redox methods have following features: similar appearances, small particle size, and narrow distribution, etc. The photocatalytic experiment shows that, this kind of Cu2O has excellent photocatalytic activity over four nitrophenol.

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 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.

Preparation of CNTs/TiO2/CS Film and its Photocatalytic Activity

2011 ◽  
Vol 287-290 ◽  
pp. 1607-1611
Author(s):  
Li Ping Zeng ◽  
Quan Zhang ◽  
Guo Qiang Zhang ◽  
Li Hui Zou
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Synergetic Effect ◽  
Structure And Property ◽  
Catalyst Film ◽  
Photocatalytic Activities ◽  
Ft Ir ◽  
Gaseous Formaldehyde ◽  
Carbon Nano Tube

In this work, carbon nano-tube/TiO2(CNTs/TiO2) nanocomposites were prepared using a conventional sol-gel method. To further obtain a uniform catalyst film, chitosan (CS) was used as a crosslinker for the CNTs/TiO2composite. The structure and property of CNTs/TiO2/CS film were characterized using XRD, FT-IR, TEM, SEM, and UV-vis. The photocatalytic activities of CNTs/TiO2/CS film were measured through the photocatalytic degradation of gaseous formaldehyde. Compared with the commercial TiO2, higher degradation was achieved with the CNTs/TiO2/CS film due to stronger absorbability and synergetic effect among CNTs, TiO2, and CS.

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.

Ultrasound Assisted Synthesis of Visible Light Responsive Nitrogen Doped TiO2 Nano Photocatalyst

2013 ◽  
Vol 856 ◽  
pp. 22-24 ◽  
Author(s):  
Ramita Batra ◽  
Nidhi Sharotri ◽  
Dhiraj Sud
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Model Compound ◽  
Anatase Phase ◽  
Visible Region ◽  
Sonochemical Method ◽  
Nitrogen Doped ◽  
Ft Ir ◽  
Ultrasound Assisted ◽  
Metal Doped

The present study is an attempt to synthesize N-doped TiO2 nanophotocatalyst using sonochemical method, having photocatalytic activity in the visible region. Non-metal doped nanocatalysts have been successfully synthesized and characterized structurally and physiochemically by using XRD, SEM, TEM, EDX, UV-VIS, FT-IR, Raman and PL. The photocatalytic activity of the synthesized photocatalyst was investigated for the degradation of 2-CP as model compound. The result confirms the successful synthesis of N-doped photocatalyst with particle size 34 nm having anatase phase and shows new peak in a visible region at 587 nm..

scholarly journals Synthesis of BiSI/Ag2CO3 Composite Material for Photocatalytic Degradation of Rhodamine B under Visible Light

2021 ◽  
Author(s):  
Rui Zhang ◽  
ziyin chen ◽  
Chen Zhao ◽  
Kunlin Zeng ◽  
Lu Cai ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Electrochemical Impedance ◽  
Diffuse Reflectance Spectroscopy ◽  
Mass Ratio ◽  
X Ray ◽  
Visible Light Driven

Abstract A novel binary BiSI/Ag2CO3 photocatalyst with excellent visible light-driven photocatalytic performance was prepared. The products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) and electrochemical impedance spectroscopy (EIS). The photocatalytic activity of the samples were evaluated by photocatalytic degradation of rhodamine B(RhB) under the irradiation of visible light. The results showed that the BiSI improves the photocatalytic activity of BiSI/Ag2CO3. Moreover, when the mass ratio of BiSI in BiSI/Ag2CO3 composites was 40%, the as-prepared BiSI/Ag2CO3 composite exhibited the best photocatalytic activity for degrading RhB. Finally, the possible mechanism for photodegradation over the BiSI/Ag2CO3 composites is also proposed.

scholarly journals Synthesis, characterization and photocatalytic activity of activated charcoal prepared from vegetable sponge for photocatalytic degradation of Rhodamine B dye

2019 ◽  
Vol 6 (2) ◽  
pp. 161-170
Author(s):  
Karolina Marques Enick ◽  
Luís Otávio Bulhões ◽  
Cristiane dos Santos ◽  
Luís Fernando Wentz Brum ◽  
William Leonardo da Silva
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Activated Charcoal ◽  
Rhodamine B Dye

scholarly journals Preparation and Photocatalytic Activity of TiO2/Fine Char for Removal of Rhodamine B

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Mingjie Ma ◽  
Weijie Guo ◽  
Zhengpeng Yang ◽  
Shanxiu Huang ◽  
Guanyu Wang
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Uv Light ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Light Illumination ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Light Irradiation

TiO2/fine char (FC) photocatalyst was prepared via sol-gel method with tetrabutyl titanate as the precursor and FC as the carrier. The structural property of TiO2/FC photocatalyst was investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the photocatalytic activity of TiO2/FC was evaluated by photocatalytic degradation of rhodamine B (RhB) aqueous solution under UV light irradiation. The results showed that TiO2was successfully coated on the surface of FC, and the TiO2/FC photocatalyst had better photocatalytic efficiency and stability for degradation of RhB under UV light illumination as compared to that of the pure TiO2and FC. The study provided a novel way for the application of FC to the photocatalytic degradation of organic wastes.

Synthesis and High Visible Light Photocatalytic Activity of Ternary Brookite-g-C3N4-BiOBr Composite

NANO ◽  
2020 ◽  
Vol 15 (04) ◽  
pp. 2050045
Author(s):  
Ning Liu ◽  
Huidong Xie ◽  
Jie Li ◽  
Yajuan Zhao ◽  
Na Wang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Rhodamine B ◽  
Separation Efficiency ◽  
Photogenerated Electron ◽  
Photocurrent Density ◽  
Electron Hole ◽  
Degradation Ratio ◽  
Loading Amount ◽  
Visible Light Photocatalytic

Brookite TiO2 was synthesized by a hydrothermal method, g-C3N4 was prepared by a pyrolytic method, brookite/g-C3N4 composites were prepared by a calcining method, and brookite/g-C3N4/BiOBr ternary composites were prepared by loading BiOBr on the surface of brookite/g-C3N4. XRD and XPS analysis of the composites confirmed the formation of brookite TiO2/g-C3N4/BiOBr. SEM and TEM results confirmed the as-prepared composites were nanosized. The optimum loading amount of BiOBr was 30%. The photocatalytic results showed that the brookite/g-C3N4/30%BiOBr composites degraded rhodamine B completely under visible light irradiation. The degradation ratio of brookite/g-C3N4/30%BiOBr toward rhodamine B was nearly 100% for 2[Formula: see text]h, which was much higher than that of brookite TiO2 and brookite/g-C3N4 catalysts. The reason for the improvement of photocatalytic activity might be because the composites promoted the formation of superoxide radicals and the separation efficiency of photogenerated electron-hole pairs. The photocurrent density of the brookite/g-C3N4/30%BiOBr was about 10 times higher than that of pure brookite. In addition, the brookite/g-C3N4/BiOBr showed a good repeatablity of photocatalysis.

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