Photocatalytic degradation of disulfine blue using titanium dioxide nanoparticles under ultraviolet light irradiation: A response surface methodology approach

2016 ◽  
Vol 35 (6) ◽  
pp. 1657-1663 ◽  
Author(s):  
A.R. Bagheri ◽  
M. Ghaedi ◽  
S. Hajati ◽  
M. Montazerozohori
Keyword(s):  
Response Surface Methodology ◽  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Response Surface ◽  
Ultraviolet Light ◽  
Titanium Dioxide Nanoparticles ◽  
Light Irradiation ◽  
Ultraviolet Light Irradiation

scholarly journals Photocatalytic Degradation of Deoxynivalenol Using Cerium Doped Titanium Dioxide under Ultraviolet Light Irradiation

Toxins ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 481
Author(s):  
Pengzhen He ◽  
Zhiyong Zhao ◽  
Yanglan Tan ◽  
Hengchao E ◽  
Minghui Zuo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Ultraviolet Light ◽  
Degradation Mechanism ◽  
Sol Gel ◽  
Degradation Pathway ◽  
Pure Tio2 ◽  
Light Irradiation ◽  
Ultraviolet Light Irradiation ◽  
Doped Titanium Dioxide

Deoxynivalenol (DON) is a major mycotoxin with high toxicity that often contaminates grains, foods and feeds. The traditional approaches for DON removal are difficult to meet industry and agriculture demands due to the high stability of the DON molecule. Therefore, there is an urgent need to develop green and effective strategies for DON degradation. In this study, a batch of photocatalytic nanomaterials of cerium (Ce) doped titanium dioxide (TiO2) were successfully prepared by sol-gel method. The catalysts were systematically characterized by XRD, HRTEM, FT-IR, UV-Vis and XPS. The catalyst 0.5Ce-TiO2 showed superior photocatalytic activity for DON degradation in aqueous solution under ultraviolet light irradiation, better than that of traditional photocatalyst pure TiO2, and 96% DON with initial concentration of 5.0 mg/L could be degraded in 4 h. In addition, the two possible degradation intermediate products C5H8O3 and C17H18O6 were identified, the photocatalytic degradation mechanism and degradation pathway were studied. The results indicate that Ce doped TiO2 photocatalyst can be used to reduce DON effectively.

Photoinduced reversible shape conversion of silver nanoparticles assisted by TiO2

2014 ◽  
Vol 16 (40) ◽  
pp. 21999-22007 ◽  
Author(s):  
Bin Tang ◽  
Mingwen Zhang ◽  
Ya Yao ◽  
Lu Sun ◽  
Jingliang Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silver Nanoparticles ◽  
Titanium Dioxide ◽  
Ultraviolet Light ◽  
Light Irradiation ◽  
Shape Transformation ◽  
Silver Nanoprisms ◽  
Ultraviolet Light Irradiation ◽  
Sodium Lamp

Titanium dioxide quantum dots promote shape transformation of silver nanoparticles from nanoprisms to nanodecahedra upon ultraviolet light irradiation. The obtained silver nanodecahedra are reconverted to silver nanoprisms under sodium lamp.

scholarly journals Optimization of Facile Synthesized ZnO/CuO Nanophotocatalyst for Organic Dye Degradation by Visible Light Irradiation Using Response Surface Methodology

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1509
Author(s):  
Vasi Uddin Siddiqui ◽  
Afzal Ansari ◽  
M. Taazeem Ansari ◽  
Md. Khursheed Akram ◽  
Weqar Ahmad Siddiqi ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Response Surface ◽  
Surface Area ◽  
Visible Light Irradiation ◽  
Irradiation Time ◽  
Light Irradiation ◽  
Individual Parameter ◽  
Validation Experiment

In this study, we aimed to observe how different operating parameters influenced the photocatalytic degradation of rhodamine B (RhB, cationic dye) and bromophenol Blue (BPB, anionic dye) over ZnO/CuO under visible light irradiation. This further corroborated the optimization study employing the response surface methodology (RSM) based on central composite design (CCD). The synthesis of the ZnO/CuO nanocomposite was carried out using the co-precipitation method. The synthesized samples were characterized via the XRD, FT-IR, FE-SEM, Raman, and BET techniques. The characterization revealed that the nanostructured ZnO/CuO formulation showed the highest surface area (83.13 m2·g−1). Its surface area was much higher than that of pure ZnO and CuO, thereby inheriting the highest photocatalytic activity. To substantiate this photocatalytic action, the investigative analysis was carried out at room temperature, associating first-order kinetics at a rate constant of 0.0464 min−1 for BPB and 0.07091 min−1 for RhB. We examined and assessed the binary interactions of the catalyst dosage, concentration of dye, and irradiation time. The suggested equation, with a high regression R2 value of 0.99701 for BPB and 0.9977 for RhB, accurately matched the experimental results. Through ANOVA we found that the most relevant individual parameter was the irradiation time, followed by catalyst dose and dye concentration. In a validation experiment, RSM based on CCD was found to be suitable for the optimization of the photocatalytic degradation of BPB and RhB over ZnO/CuO photocatalysts, with 98% degradation efficiency.

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