Synthesis, Characterization and Photocatalytic Properties of CdS Nanorods

2012 ◽  
Vol 535-537 ◽  
pp. 264-267 ◽  
Author(s):  
Li Juan Xie ◽  
Li Mei Duan ◽  
Ling Xu ◽  
Yin Wang ◽  
Xiao Lei Wang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Methyl Orange ◽  
Uv Irradiation ◽  
Degradation Rate ◽  
Raw Material ◽  
Cadmium Nitrate ◽  
Solution Ph ◽  
Methyl Orange Degradation ◽  
Diethylene Triamine ◽  
Cds Nanorods

CdS Nanorods have been successfully prepared by hydrothermal synthesis technology by using cadmium nitrate and thiourea as the raw material,by using diethylene triamine as the template agent. The samples were characterized by the technique of XRD、TEM and SEM. The results indicated that the products were pure hexagonal CdS. This paper also used the samples as photocatalysts to study the degradation the solution of methyl orange. The concentration of methyl orange was unchanged during the process of experiment. We also investigated the effect of the amount of catalyst, and pH of the solution on the degradation rate of methyl orange. The experimental results showed that methyl orange degradation rate reached 90% with the amount of catalyst 0.020 g, solution pH of 3.5 and UV irradiation 120 min.

scholarly journals The Role of H2C2O4 and Na2CO3 as Precipitating Agents on The Physichochemical Properties and Photocatalytic Activity of Bismuth Oxide

2020 ◽  
Vol 18 (1) ◽  
pp. 129-137
Author(s):  
Yayuk Astuti ◽  
Rizka Andianingrum ◽  
Abdul Haris ◽  
Adi Darmawan ◽  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Physicochemical Properties ◽  
Bismuth Oxide ◽  
Rate Constants ◽  
Degradation Rate ◽  
Precipitation Method ◽  
Methyl Orange Degradation ◽  
Methyl Orange Dye

AbstractSynthesis of bismuth oxide synthesis through the precipitation method using H2C2O4 and Na2CO3 precipitating agents, identification of physicochemical properties and its photocatalysis activity for methyl orange degradation were conducted. The bismuth oxide synthesis was undertaken by dissolving Bi(NO3)3.5H2O in HNO3, then added precipitating agents to form precipitate. The results showed that bismuth oxide produced by H2C2O4 precipitating agent was a yellow powder containing a mixture of α-Bi2O3 (monoclinic) and β-Bi2O3 (tetragonal), porous with size of 28-85 μm. Meanwhile, the use of Na2CO3 as precipitating agent resulted in bismuth oxide consisting of α-Bi2O3 and β-Bi2O3 and Bi2O4, irregular shape without pore being 40-115 μm in size. Bismuth oxide synthesized with H2C2O4 precipitating agent showed higher photocatalytic activity compared to bismuth oxide synthesized using Na2CO3 on degrading methyl orange dye with degradation rate constants of 2.35x10-5 s-1 for H2C2O4 and 1.81x10-5 s-1 for Na2CO3.

Methyl Orange Degradation on TiO2 and Mixture of TiO2 and HZSM-5 in NaHCO3 Solution

2012 ◽  
Vol 496 ◽  
pp. 142-145
Author(s):  
Yu Feng Sun ◽  
Jin Lei Chen ◽  
Wen Jie Zhang
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Uv Irradiation ◽  
High Adsorption ◽  
Methyl Orange Degradation

Methyl orange decoloration was conducted in the solution containing NaHCO3. TiO2 and the mixture of TiO2 and HZSM-5 were used as the photocatalysts. The addition of TiO2 greatly changed adsorption of methyl orange in solutions containing different concentration of NaHCO3. The existence of NaHCO3 can improve photocatalytic degradation of the dye under UV irradiation in the solution containing TiO2. As high as 55% decoloration of the dye occurred in the solution containing 1.0 mol/l NaHCO3. When NaHCO3 concentration was lower than 0.08 mol/l, adsorption of the dye was fairly weak on the mixture. At the same time, decoloration of the dye deceased with increasing NaHCO3 concentration. When NaHCO3 concentration was high, adsorption and decoloration of the dye were better at higher NaHCO3 concentration.

Porous TiO2 Film Electrode Used for Photoelectrocatalytic Degradation of Methyl Orange in NaHCO3 Solution

2011 ◽  
Vol 230-232 ◽  
pp. 126-130
Author(s):  
Wen Jie Zhang ◽  
Ke Xin Li
Keyword(s):  
Methyl Orange ◽  
Degradation Rate ◽  
Sol Gel ◽  
Applied Potential ◽  
Methyl Orange Degradation ◽  
Photoelectrocatalytic Degradation ◽  
Degradation Rates ◽  
Negative Effect ◽  
Optimal Values ◽  
Degradation Of Methyl Orange

PEG1000 was used as template to prepare porous TiO2 film by sol-gel method. The functions of applied potential and concentration of NaHCO3 to the photoelectrocatalytic degradation of methyl orange on porous and smooth TiO2 films were investigated. Methyl orange degradation rate has two optimal values at the applied potential of 0.8 V and 1.8 V. The addition of PEG may have negative effect on photoelectrocatalytic activity of TiO2 film. The degradation rate increases with increasing NaHCO3 concentration from 0 up to 0.05 mol/l, and then it declines after further increase of electrolyte concentration. After 100 min of reaction, the degradation rates on the films prepared without and with PEG addition are 63.78% and 65.22%, respectively.

Photocatalytic Methyl Orange Degradation on TiO2-NaX Composite

2010 ◽  
Vol 129-131 ◽  
pp. 804-807
Author(s):  
Hong Wang ◽  
Yang Yu ◽  
Wen Jie Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Solid State ◽  
Degradation Rate ◽  
Pure Tio2 ◽  
Methyl Orange Degradation ◽  
Maximum Value ◽  
Photocatalytic Activities ◽  
Addition Amount ◽  
Better Than

Photocatalytic activities of simple mixture of TiO2 and NaX, and TiO2-NaX composite prepared by solid-state dispersion method were investigated. Methyl orange degradation rate increased sharply when TiO2 concentration was low and reached its maximum value at TiO2 concentration of 200 mg/l when using pure TiO2. After 120 min of irradiation, methyl orange degradation rate could reach 98.4%, which means nearly all of the dye degraded after two hours. The photocatalytic activity of TiO2 and NaX simple mixture increased with increasing amount of NaX up to 60.4% when NaX amount was 1.4 g/l. The composite TiO2-NaX prepared by grinding had lower activity at various NaX addition amount. The photocatalytic activity of composite TiO2-NaX prepared by solid-state dispersion was better than the composite before calcination. However, the maximum degradation rate was only 41.2%, which was still lower than pure TiO2.

Cosolvent-free nanocasting synthesis of ordered mesoporous g-C3N4 and its remarkable photocatalytic activity for methyl orange degradation

RSC Advances ◽  
2015 ◽  
Vol 5 (94) ◽  
pp. 76963-76972 ◽  
Author(s):  
Xiaochun Gao ◽  
Xuejiao Jiao ◽  
Lanchun Zhang ◽  
Wencai Zhu ◽  
Xiaohong Xu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Rate Constant ◽  
Degradation Rate ◽  
Methyl Orange Degradation ◽  
Ordered Mesoporous ◽  
Degradation Rate Constant ◽  
Nanocasting Route

Ordered mesoporous g-C3N4, synthesized via a green cosolvent-free nanocasting route, exhibited remarkable photodegradation performance towards methyl orange with a degradation rate constant 30 times higher than that of bulk g-C3N4.

TiO2-HY(FeY) Composites Used as Photocatalysts on Methyl Orange Degradation

2010 ◽  
Vol 129-131 ◽  
pp. 848-852
Author(s):  
Li Li Yang ◽  
Jia Wei Bai ◽  
Wen Jie Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Solid State ◽  
Degradation Rate ◽  
Pure Tio2 ◽  
Y Zeolite ◽  
Dispersion Method ◽  
Methyl Orange Degradation ◽  
Maximum Value ◽  
Wide Range

Photocatalytic activity of simple mixture of TiO2 and HY(FeY), and TiO2-HY(FeY) composite prepared by solid-state dispersion method were investigated to study the effect of Y zeolite addition on TiO2 activity. Methyl orane degradation rate increased sharply with increasing TiO2 amount at low photocatalyst concentration until it reached the maximum value when TiO2 concentration was 200 mg/l. In the wide range of HY(FeY) content, TiO2-HY(FeY) composite prepared by solid-state dispersion method showed weaker photocatalytic activity on methyl orange degradation compared with pure TiO2. When TiO2:HY ratio was 10:5, the maximum methyl orange degradation rate was 51.2% in the simple mixture of TiO2 and HY. When TiO2:FeY ratio was 10:7 in the simple mixture of TiO2 and FeY, the optimum methyl orange degradation rate was 60.9%, which was a little higher than that of TiO2.

Photocatalytic Degradation of Methyl Orange on the Composite of TiO2 and Lanthanum Niobate

2011 ◽  
Vol 213 ◽  
pp. 63-67
Author(s):  
Wen Jie Zhang ◽  
Xin Sun ◽  
Nan Ge
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Methyl Orange Solution ◽  
Solid State Reaction Method ◽  
Pure Tio2 ◽  
Composite Photocatalyst ◽  
Methyl Orange Degradation ◽  
Orange Solution ◽  
Degradation Of Methyl Orange

In order to improve the photocatalytic activity of TiO2, the optimal catalytic conditions of TiO2 and niobate as well as the composite TiO2 and niobate photocatalyst were studied. 10 mg/l of methyl orange solution was taken as imitated waste water. The results indicated that the optimum dosage of TiO2 was 0.8 g/l. The optimal calcination temperature to prepare lanthanum niobate was 900 oC. n(La):n(Nb) was in the range of 0.6:1−3:1, and the photocatalyst prepared in the ratio of 1.4:1 showed the highest activity. The results also showed that, TiO2-lanthanum niobate composite prepared by solid-state reaction method showed better photocatalytic activity on methyl orange degradation compared with pure TiO2. After 120 minutes of irradiation, methyl orange degradation rate reached 94.2 % when using the composite photocatalyst.

Photocatalytic Degradation of Methyl Orange Using Doped Titanium Dioxide Coating

2014 ◽  
Vol 955-959 ◽  
pp. 112-115
Author(s):  
Li Wang ◽  
Dong Mei Jia ◽  
Zeng Qiang Zhao
Keyword(s):  
Titanium Dioxide ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Methyl Orange Degradation ◽  
Photo Catalytic Activity ◽  
Photocatalytic Activities ◽  
Doped Titanium Dioxide ◽  
La Doped ◽  
Degradation Time ◽  
Degradation Of Methyl Orange

Titanium dioxide (TiO2) coating was prepared through dipping stainless steel net into titanium dioxide sol and then extracting it. The photocatalytic activities for all titanium dioxide coatings were tested by methyl orange degradation under ultraviolet and visible light irradiation. The photo-absorption property was determined by UV-Vis spectrophotometer. The titanium dioxide coating is photo-catalytically reactive for the degradation of methyl orange. The photo-catalytic activity is influenced by extraction times, degradation time, doping element and light source. La-doped titanium dioxide exhibits the best photocatalytic activity in comparison with undoped, V-doped and La-V-codoped ones. The degradation rate of methyl orange by La-doped titanium dioxide coating reaches 92% after 70 minutes irradiation under ultraviolet light.

The Preparation and Characterization of ZAO/TiO2 Nanotubes Composite Materials

2013 ◽  
Vol 341-342 ◽  
pp. 157-161
Author(s):  
Yang Lin Liu ◽  
Xue Chen Duan ◽  
Yan Yan Liu
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Catalytic Effect ◽  
Particle Surface ◽  
Doping Amount ◽  
Methyl Orange Degradation

The surface chemistry method is used to produce Zinc Aluminium oxide (ZAO) particle surface which modifying tubular TiO2 and can produce nanotubes composite material of ZAO/TiO2. The influence of different atom proportionings, aluminum doping amount as well as the contents of Zn and other conditions on the production of composite material's surface morphology, microstructure and photocatalytic performance were Study with XRDSEMTEM and other characterization means. The experiments indicated when Zn:Ti=1:4(a.t.),it has the best catalytic effect and the methyl orange degradation rate can reach 95% at 50min.

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