A one-dimensional Ag(I) coordination polymer as luminescent sensor for detecting Cr2O72− and exhibiting highly photodegradation capacities for methylene blue solution

Polyhedron ◽  
2018 ◽  
Vol 141 ◽  
pp. 276-283 ◽  
Author(s):  
Hai Ning Chang ◽  
Suo Xia Hou ◽  
Zeng Chuan Hao ◽  
Guang Hua Cui
Keyword(s):  
Methylene Blue ◽  
Coordination Polymer ◽  
Methylene Blue Solution ◽  
One Dimensional ◽  
Luminescent Sensor ◽  
Blue Solution

Synthesis of Visible-Light Responsive CdS/ZnO Nanocomposite Photocatalysts via Simple Precipitation Method

2014 ◽  
Vol 608 ◽  
pp. 224-229 ◽  
Author(s):  
Potjanaporn Chaengchawi ◽  
Karn Serivalsatit ◽  
Pornapa Sujaridworakun
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Precipitation Method ◽  
Cds Nanoparticles ◽  
Methylene Blue Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Blue Solution ◽  
Scanning Electron

A visible-light responsive CdS/ZnO nanocomposite photocatalyst was successfully synthesized by precipitation of CdS nanoparticles, using Cd (NO3)2 and Na2S as starting materials, on ZnO nanoparticles and then calcined at 400°C for 2 hours. The effects of the mole ratio of CdS and ZnO in the composites on their phase, morphology, and surface area were investigated by X-ray Diffraction (XRD), scanning electron microscope (SEM), Brunauer Emmett Teller method (BET), respectively. The photocatalytic degradation of methylene blue solution in the presence of composite products under visible-light irradiation was investigated. The results showed that the mole ratio of CdS and ZnO played a significant role on photocatalytic performance. The highest photocatalytic activity was obtained from the CdS/ZnO nanocomposite with mole ratio of 1:4, which is higher than that of pure CdS and pure ZnO.

Preparation and Photocatalytic Activity of TiO2/Opal Composite

2013 ◽  
Vol 668 ◽  
pp. 13-16
Author(s):  
Qing Shan Li ◽  
Biao Zhan ◽  
Wei Hong ◽  
Guang Zhong Xing
Keyword(s):  
Methylene Blue ◽  
Uv Light ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Methylene Blue Solution ◽  
Photocatalytic Decolorization ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities ◽  
Blue Solution ◽  
Gel Technique

Opal as a carrier, tetrabutyl titanate as a titanium source, TiO2 loaded on opal was prepared by sol-gel technique. The photocatalysts were characterized by XRD, TEM and UV-VIS absorption spectrum. Their photocatalytic activities were examined by the photocatalytic decolorization of methylene blue solution under UV light irradiation. The effects of calcination temperature, the amount of TiO2 loading and pH on photocatalytic activities were discussed. The results show that TiO2 supported on opal induced enhancement of photocatalytic decolorization rant and TiO2 doping is about 30 wt. % with 92.15% of decolorization rate at 700°C.

scholarly journals The generation of the singlet oxygen in methylene blue solution and its effect to the tissue

1987 ◽  
Vol 8 (3) ◽  
pp. 59-60
Author(s):  
Ichiro TANABE ◽  
Hiroshi FUJIMURA ◽  
Tatsuo OTANI ◽  
Yukinori OKAZAKI ◽  
Tadayoshi TAKEMOTO ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Singlet Oxygen ◽  
Methylene Blue Solution ◽  
Blue Solution

scholarly journals Synthesis and Photoactivity of Fe3O4/TiO2-Co as a Magnetically Separable Visible Light Responsive Photocatalyst

2018 ◽  
Vol 18 (3) ◽  
pp. 403 ◽  
Author(s):  
Eko Sri Kunarti ◽  
Indriana Kartini ◽  
Akhmad Syoufian ◽  
Karolina Martha Widyandari
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Dopant Concentration ◽  
Band Gap Energy ◽  
Methylene Blue Solution ◽  
Magnetic Photocatalyst ◽  
Blue Solution ◽  
Degradation Reaction ◽  
Visible Irradiation ◽  
Uv Visible

Synthesis of magnetic photocatalyst, Fe3O4/TiO2-Co, with characterization and photoactivity examination have been conducted. The synthesis was initiated by preparation of Fe3O4 particles using coprecipitation method. The Fe3O4 particles were then coated with TiO2-Co at a various ratio of Fe3O4:TiO2 and concentration of Co(II) dopant. The Fe3O4/TiO2-Co was characterized by FTIR, XRD, TEM, SEM-EDX, VSM, and SR UV-visible methods. Photoactivity of the Fe3O4/TiO2-Co was carried out using methylene blue as a target molecule in degradation reaction within a batch system. By using optimum conditions, the degradation of methylene blue solution was performed under exposure to UV, visible light and dark condition. Results showed that the Fe3O4/TiO2-Co formation was confirmed by the presence of Fe3O4 and anatase diffraction peaks in the X-ray diffractogram. SR UV-Vis spectra indicated that the Fe3O4/TiO2-Co was responsive to visible light. Band gap energy of the Fe3O4/TiO2-Co with dopant concentration of 1; 5; 10 and 15% were 3.22; 3.12; 3.09 and 2.81 eV, respectively. The methylene blue solution can be well photodegraded at a pH of 10 for 210 min. The Fe3O4/TiO2-Co has the highest ability to methylene blue photodegradation with dopant concentration of 10% gave degradation yield of 80.51 and 95.38% under UV and visible irradiation, respectively.

Cyanophycean (Cyanobacterial) diversity from the Lakhimpur-Khiri District of Northern Uttar Pradesh, India

2021 ◽  
Vol 1 (2) ◽  
pp. 1-2
Author(s):  
Digvijay Verma ◽  
Vinay Kumar Singh ◽  
Rinku Bharati ◽  
Shyam Kishore ◽  
Seshu Lavania
Keyword(s):  
Methylene Blue ◽  
Microscopic Study ◽  
Standard Method ◽  
Uttar Pradesh ◽  
Water Bodies ◽  
Methylene Blue Solution ◽  
Different Seasons ◽  
Blue Solution ◽  
Cyanobacterial Diversity ◽  
First Time

In the present study, the cyanophycean diversity of the Lakhimpur-Khiri district, northern Uttar Pradesh, India, has been investigated for the first time. Algae samples were collected in plastic bottles and preserved in 3-4% formalin from Lakhimpur-Khiri district of northern Uttar Pradesh in different seasons from 2015 to 2016. The field photographs of the selected localities were also taken and the location of each site noted down. For the Microscopic study of Cyanophycean algae, the samples were stained with 1 % aqueous methylene blue solution according to the standard method. The observations and photomicrography were done with help of Nikon Labophot-11 microscope. A total of 31 cyanophycean algal taxa have been recorded from different water bodies of Lakhimpur-Khiri. These algal taxa belong to 14 genera and 9 families of the division Cyanophyata. Of these, Oscillatoria (7), Phormidium (4) and Lyngbya (3) are abundant.

Demonstration of the Enhanced Mixing and Reaction Ability of an Alternate Pumping Microreactor With Visualization of the Mixing Field and the Reaction Field

2010 ◽  
Author(s):  
Tamio Fujiwara ◽  
Hiroshi Ohue ◽  
Takumi Urata
Keyword(s):  
Methylene Blue ◽  
Flow Pattern ◽  
Layered Structure ◽  
Ferrous Sulphate ◽  
Concentration Field ◽  
Potassium Thiocyanate ◽  
Channel Length ◽  
Methylene Blue Solution ◽  
Reaction Field ◽  
Blue Solution

In order to enhance the mixing and reaction capabilities of micromixers and microreactors, we had proposed a novel system termed alternate pumping microreactor (APMR) and had demonstrated that the APMR could generate a thin-layered structure under a particular pumping condition. This flow pattern should enhance the abovementioned capabilities. In this paper, we visualized the dilution process of methylene blue solution with water in the APMR and established a method to obtained the concentration field from the captured image according to the relation between the methylene blue concentration and the saturation of the captured color. To assess the reaction field, visualization of the reaction of ferrous sulphate and potassium thiocyanate was adopted. These visualization results suggested that the APMR enhanced the mixing and reacting capabilities and the time and channel length required for the reaction to complete were two order orders of magnitude lesser than those in the case of the ordinary reactor.

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.

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