Preparation of Nano-TiO2 and Performance Study on Photocatalytic Degradation of Methylene Blue

2012 ◽  
Vol 430-432 ◽  
pp. 1040-1043
Author(s):  
Jiang Liu ◽  
Zheng Xian Ma ◽  
Shuai Liang
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Ph Value ◽  
Raw Material ◽  
Dye Wastewater ◽  
Performance Study ◽  
Water Addition ◽  
Nano Tio2 ◽  
Blue Solution ◽  
And Performance

Experiment of photocatalytic degradation was conducted through using tetra-n-butyl titanate and ethyl alcohol as raw material, adopting sol-gol method to prepare photocatalyst of nano-TiO2 and using methylene blue solution as analogue dye wastewater. The influences of hydrolyzing temperature, PH value, different water addition, and different speed of adding drops were investigated, as well as the reuse rate of photocatalyst.

Adsorption Properties of Pomelo Peels against Methylene Blue in Dye Wastewater

2013 ◽  
Vol 634-638 ◽  
pp. 178-181 ◽  
Author(s):  
Su Xia Hou
Keyword(s):  
Methylene Blue ◽  
Adsorption Process ◽  
Ph Value ◽  
Removal Rate ◽  
Rate Equations ◽  
Dye Wastewater ◽  
Optimum Conditions ◽  
Isothermal Adsorption ◽  
Pomelo Peel ◽  
Blue Solution

Pomelo peel was chosen as adsorbent to treat the simulated dye wastewater with methylene blue. The research results showed the removal rate of 140mg/L methylene blue solution with 100mL could reach more than 83% under the optimum conditions, which were as follows: 0.4g pomelo peels powder, reaction temperature 30°C, pH value 8 and oscillating time 60min.Theoretical saturation absorptive capacity of pomelo peel was 133mg/g at 30°C.The whole adsorption process can be well described by the Langmuir and Temkin isothermal adsorption equation and secondary adsorption rate equations.

Preparation and Performance Study of Nano-Titanium Dioxide

2011 ◽  
Vol 71-78 ◽  
pp. 3262-3267
Author(s):  
Ling Huang ◽  
Zi Hui Wei ◽  
Shu Liang Ji
Keyword(s):  
Ph Value ◽  
Sol Gel ◽  
Gelation Time ◽  
Performance Study ◽  
Nano Tio2 ◽  
Nano Crystalline ◽  
Photocatalytic Activities ◽  
Optimum Reaction ◽  
And Performance ◽  
Nano Titanium Dioxide

To study the photocatalytic of nano-crystalline TiO2 and P/TiO2, nano-TiO2 and P/TiO2 photocatalyst was synthesized by sol-gel process. In the examination, with C2H5OH as solvent, Ti(OBu)4 as precursor and glacial acetic acid as inhibitor. The effect of gelation time by different reaction factors was studied during the examination. The optimum reaction conditions for preparing transparent stable TiO2 gelation are that the temperature is kept at 40°C, the pH value of solution is 2.5，and the molar ration of Ti(OBu) 4:C2H5OH:H2O:CH3COOH is 1:2.5:5:1.5.On this basis, the P/TiO2 composite materials were prepared. The microstructure，morphology and photocatalytic activities of as-prepared nano-TiO2 were studied using X-ray diffraction (XRD) and ultraviolet-visible (UV-vis) spectrophotometer,the photocatalytic efficiency was studied by investigating the photodegradation of methyl orange. Compared with pure nano-TiO2,P/TiO2 had better photocatalytic activities under UV, but little improved under Vis.

Adsorption of Methylene Blue from Aqueous Solution Using Honeycomb-Cinder

2012 ◽  
Vol 550-553 ◽  
pp. 2259-2262
Author(s):  
Song Bo Cui ◽  
Hua Yong Zhang ◽  
Lu Yi Zhang
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Dye Wastewater ◽  
Batch System ◽  
Adsorption Data ◽  
Adsorption Processes ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Mb Adsorption

The adsorption behavior of methylene blue (MB) dye from aqueous solutions onto honeycomb-cinder (HC) and its acid-activated product was investigated in a batch system. The results showed the adsorption capacity was decreased for raw HC samples with the increase of pH value, while it was increased for activated samples. The adsorption data were fit with Langmuir isotherm model for MB adsorption by all samples. The MB adsorption capacity on samples was increased from 2.62 mg/g to 7.81 mg/g and 7.00 mg/g after acid-activated by HCl and H2SO4, respectively. The adsorption processes of MB followed pseudo-second-order kinetics with a coefficient of correlation≥0.99. This study demonstrated that acid-activated HC has superior adsorbing ability for MB than raw HC and can be used as alternative adsorbents in dye wastewater treatment.

Preparation of Nanosized TiO2-Photocatalyst From-Sludge (TFS) and the Characteristics of Concrete Sidewalk Blocks Using TFS

2021 ◽  
Vol 21 (7) ◽  
pp. 3882-3886
Author(s):  
Yong-Wook Jung ◽  
Jong Kyu Kim
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Air Pollutants ◽  
Removal Rate ◽  
Low Cost ◽  
Sewage Treatment ◽  
Mixing Ratio ◽  
Tio2 Photocatalyst ◽  
And Performance ◽  
Nanosized Tio2

In this study, nano-sized low cost titanium dioxide (TFS) was prepared using sludge from sewage treatment and performance was verified. To remove air pollutants, the photocatalytic degradation of methylene blue and efflorescence characteristics is assessed according to the mixing ratio of the nano-sized TFS by applying them to concrete sidewalk blocks. The photocatalytic degradation performance of concrete sidewalk blocks shows that the methylene blue removal rate of specimens containing 2.5%, 5%, and 10% of nano-sized TFS is 29%, 27%, and 38%, respectively. When the nano-sized TFS is mingled on the surface of the sidewalk block, the performance of anti-corrosion and antifouling showed excellency mainly due to the moisture blocking derived by the antifouling function of photocatalysts.

Photocatalytic degradation of methylene blue solution by diphenylanthrazoline compounds

2017 ◽  
Vol 30 (12) ◽  
pp. e3712 ◽  
Author(s):  
Tianchu Zhao ◽  
Rui Liu ◽  
Jiapeng Lu ◽  
Xiaolin Zhu ◽  
Xuhong Zhu ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Methylene Blue Solution ◽  
Blue Solution

scholarly journals Highly efficient and cheap treatment of dye by graphene-doped TiO2 microspheres

2020 ◽  
Author(s):  
Honglian Liang ◽  
Shujun Wang ◽  
Yanhong Lu ◽  
Ping Ren ◽  
Guihua Li ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Wastewater Treatment ◽  
High Efficiency ◽  
Simple Procedure ◽  
Dye Wastewater ◽  
Methylene Blue Solution ◽  
Highly Efficient ◽  
Degradation Reactions ◽  
Blue Solution ◽  
Photocatalytic Reactions

Abstract Highly efficient dye wastewater treatment by photocatalytic catalysis commonly requires expensive catalysts, long degradation time and a complicated procedure. Here, we for the first time prepared cheap graphene-doped titanium dioxide microspheres with a simple procedure to degrade dye with high efficiency. When the catalyst concentration was 0.2 g·L−1, the photocatalysis degradation extent of methylene blue solution, methylene green solution and 1,9-dimethyl methylene blue solution reached 96.4, 85.9 and 98.7%, respectively. The results showed that the degradation reactions accorded with the Langmuir–Hinshelwood model, and the photocatalytic reactions belonged to a first-order reaction in the primary stage. Furthermore, different photocatalytic degradation mechanisms were proposed, which have not been found in other literature. This work opened a new route for simple preparation of cheap microspheres in photocatalytic dye wastewater treatment with high efficiency.

The Photocatalytic Degradation of Methylene Blue Wastewater with Nanoscale Ferric Oxide as Catalyst

2011 ◽  
Vol 356-360 ◽  
pp. 1813-1818
Author(s):  
Yi Ren Zhu ◽  
Guang Chao Li ◽  
Qian Ping Zhang ◽  
Chong Tang
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Light Source ◽  
High Voltage ◽  
Ferric Oxide ◽  
Ph Value ◽  
Order Kinetic ◽  
Mercury Lamp ◽  
Excitation Light ◽  
Simulated Wastewater

Nanoscale Ferric Oxide was prepared from natural hematite and characterized. Using it as catalyst, methylene blue-simulated wastewater was treated by photocatalytic degradation with high-voltage mercury lamp and sunlight as excitation light source. Main factors, including the preparation conditions and dosage of ferric oxide, pH value, reaction time and initial concentration of simulated wastewater, and their influence to treatment effect were discussed. Test results showed that at a pulverization time of 1.5h, calcination time of 2h at 500°C, initial methylene blue (MB) concentration of 20mg/L, pH=2 and a ferric oxide dosage of 0.01g/30ml, for both high-voltage mercury lamp and sunlight, MB wastewater was degraded effectively in lab-scale experiment; after 5h’s radiation, MB concentrations were reduced from 20mg/L to 0.51mg/L and 9.18mg/L respectively. With sunlight as the radiation light source, an enlarged experiment was done on a custom-built device, and MB concentration was reduced from 20mg/L to 0.11mg/L, which was significantly better than treatment results from lab-scale experiments and UV radiation. MB photocatatytic degradation reactions at different initial concentrations were in accordance with Lagergren’s pseudo-first-order kinetic equation. Spectral analysis of degradation products showed that MB molecules were degraded to inorganic ions.

Research on the Photocatalytic Degradability of Methylene Blue Solution by Photocatalysis Bamboo Charcoal Fiber Knitted Fabric

2011 ◽  
Vol 332-334 ◽  
pp. 1040-1044 ◽  
Author(s):  
Qiu Mei Wang ◽  
Lei Tan ◽  
Rong Wen Zhou ◽  
Zhi Wei Zou ◽  
Xue Mei Xu
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Liquid Level ◽  
Knitted Fabric ◽  
Bamboo Charcoal ◽  
Methylene Blue Solution ◽  
Initial Concentration ◽  
Blue Solution ◽  
Degradation Effect

In this paper, the photocatalytic degradation of methylene blue solution by photocatalysis bamboo charcoal fiber knitted fabric was studied. The relationships were analyzed between the photocatalytic degradation rate and the reaction time, the initial concentration, pH of methylene blue solution, and the distance between the UV light centre and liquid level. The results indicates that there is an remarkable photocatalytic degradation effect of methylene blue solution by photocatalysis bamboo charcoal fiber knitted fabric under UV-irradiation, even the degradation rate could reach to 67.02%. The degradation effect was better with lower initial concentration of methylene blue solution, higher initial pH，and the shorter distance between light centre and liquid level.

Photocatalytic Degradation Study of Titania Sol-Gel Coated on Commercial Unglazed Ceramic Tiles

2017 ◽  
Vol 751 ◽  
pp. 819-824
Author(s):  
Pat Sooksaen ◽  
Nawapan Saowaros ◽  
Khemphatsorn Ngamkaruhasereethorn ◽  
Angkoona Pringkasemchai
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Ceramic Surface ◽  
Ceramic Tiles ◽  
Degradation Study ◽  
Blue Solution ◽  
Titania Sol ◽  
20 Nm ◽  
Tile Surface

In this research photocatalytic degradation of nanotitania synthesized via sol-gel method and coated on commercial unglazed ceramic tiles was investigated. The starting precursors were titanium (IV) tetraisopropoxide (Ti [OCH(CH3)2]4; TIP), ethanol, hydrochloric acid and distilled water. Unglazed ceramic tiles were sintered at 900°C and 1100°C. The nanotitania based sols were applied on the tile surface using air-brush and calcined at 500°C for 3 h. The particle size of the synthesized TiO2 varied in the range 8-20 nm. The photocatalysis of nanotitania was studied through the photodegradation of methylene blue solution under UVC irradiation using UV-Vis Spectrophotometer. The presence of nanotitania on unglazed ceramic tiles was confirmed by a scanning electron microscope equipped with energy dispersive X-ray spectrometer (EDS). Ceramic tiles sintered at 900°C gave higher % open porosity and hence higher amount of nanotitania embedded on the ceramic surface. The results showed that all unglazed ceramic tiles coated with nanotitania were able to show photodegradation of methylene blue.

Photocatalytic Degradation of Methylene Blue on MoS2/TiO2 Nanocomposite

2011 ◽  
Vol 197-198 ◽  
pp. 996-999 ◽  
Author(s):  
Kun Hong Hu ◽  
Yong Kui Cai ◽  
Sai Li
Keyword(s):  
Methylene Blue ◽  
Ph Value ◽  
Visible Light Region ◽  
Methylene Blue Solution ◽  
Initial Concentration ◽  
Degradation Temperature ◽  
Light Region ◽  
Blue Solution ◽  
Degradation Reaction ◽  
Decoloration Rate

A MoS2/TiO2 composite was synthesized and its photocatalytic activity for the degradation of methylene blue was evaluated. The results showed that the nano-MoS2/TiO2 composite presented excellent photocatalytic properties in the degradation reaction of methylene blue, which was ascribed to the good absorption of nano-MoS2/TiO2 in the visible light region. The decoloration rate of methylene blue solution was influenced by the dosage of nano-MoS2/TiO2 and the initial concentration of methylene blue. However, both the pH value and the degradation temperature had negligible effects on the decoloration rate of methylene blue. Moreover, the nano-MoS2/TiO2 composite as the degradation catalyst of methylene blue was of good regeneration properties.

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