Study on High-Efficiency Photocatalytic Degradation of Oxytetracycline Based on a Spiral Microchannel Reactor

2021 ◽  
Author(s):  
Lianyu Jia ◽  
Yang Jin ◽  
Jun Li ◽  
Zhizhen Wei ◽  
Ming Chen ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
High Efficiency ◽  
Microchannel Reactor ◽  
Spiral Microchannel

scholarly journals Electric Field Assisted Femtosecond Laser Preparation of Au@TiO2 Composites with Controlled Morphology and Crystallinity for Photocatalytic Degradation

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3816
Author(s):  
Xiaojie Li ◽  
Xin Li ◽  
Pei Zuo ◽  
Xiaozhe Chen ◽  
Misheng Liang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Electric Field ◽  
Photocatalytic Degradation ◽  
Au Nanoparticles ◽  
High Efficiency ◽  
Free Electron Density ◽  
Pulse Delay ◽  
Dye Pollutants ◽  
Amorphous Tio2 ◽  
Laser Liquid

TiO2 is popular in photocatalytic degradation dye pollutants due to its abundance and its stability under photochemical conditions. Au loaded TiO2 can achieve efficient absorption of visible light and deal with the problem of low conversion efficiency for solar energy of TiO2. This work presents a new strategy to prepare Au nanoparticles-loaded TiO2 composites through electric−field−assisted temporally−shaped femtosecond laser liquid-phase ablation of Au3+ and amorphous TiO2. By adjusting the laser pulse delay and electric field parameters, gold nanoparticles with different structures can be obtained, such as nanospheres, nanoclusters, and nanostars (AuNSs). AuNSs can promote the local crystallization of amorphous TiO2 in the preparation process and higher free electron density can also be excited to work together with the mixed crystalline phase, hindering the recombination between carriers and holes to achieve efficient photocatalytic degradation. The methylene blue can be effectively degraded by 86% within 30 min, and much higher than the 10% of Au nanoparticles loaded amorphous TiO2. Moreover, the present study reveals the crystallization process and control methods for preparing nanoparticles by laser liquid ablation, providing a green and effective new method for the preparation of high-efficiency photocatalytic materials.

The Y‐TiO 2 /5A/NiFe 2 O 4 Composite for the High‐efficiency Adsorption and Photocatalytic Degradation of Norfloxacin under Visible Light

2021 ◽  
Vol 6 (29) ◽  
pp. 7295-7305
Author(s):  
Jing Xu ◽  
Zhihao Ren ◽  
Xiaoyuan Qiu ◽  
Pengfei Zhu ◽  
Dandan Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Efficiency

scholarly journals Efficiency of Photocatalytic Degradation of Humic Acid Using Magnetic Nanoparticles (Fe-doped TiO2@Fe3O4) in Aqueous Solutions

Health Scope ◽  
2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Hossein Moein ◽  
Gholamreza Nabi Bidhendi ◽  
Naser Mehrdadi ◽  
Hossein Kamani
Keyword(s):  
Magnetic Nanoparticles ◽  
Humic Acid ◽  
Aqueous Solutions ◽  
Photocatalytic Degradation ◽  
High Efficiency ◽  
Sol Gel ◽  
Reaction Times ◽  
Doped Tio2 ◽  
Natural Organic Matters ◽  
Uv Lamp

Background: Among water pollutants, Natural Organic Matters (NOMs) are highly important for making problems in water treatment plants. Objectives: The main objective of this study was to investigate the efficiency of photocatalytic degradation of humic acid using magnetic nanoparticles (Fe-doped TiO2@Fe3O4) in aqueous solutions. Methods: In the present experiment, Fe-doped TiO2@Fe3O4 nanoparticles were synthesized by the sol-gel method, and SEM, XRD, and DRS analyzes were utilized to characterize the synthesized nanoparticles. The effects of various variables, including pH (3 - 11), initial concentration of humic acid (20 - 80 mg/L), and concentration of nanoparticles (250 - 2000 mg/L) at different reaction times (15 - 60 min) were investigated on the photocatalytic degradation of humic acid. Results: The maximum degradation efficiency of humic acid at pH 3, the initial humic acid concentration of 5 mg/L, nanoparticle dose of 400 mg/L, and reaction time of 60 min using a 15-W bare UV lamp. Conclusions: Due to the high efficiency of photocatalytic degradation, it is proposed to use for the removal of humic acid from water resources.

One-Step Hydrothermal Synthesis of 1T@2H MoS2 for Enhanced Photocatalytic Degradation Performance of Methyl Blue

2020 ◽  
Vol 993 ◽  
pp. 1496-1501
Author(s):  
Dong Dong Li ◽  
Yan Hua Lei ◽  
Ning Tan ◽  
Tao Liu ◽  
Xue Ting Chang ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Efficiency ◽  
Removal Rate ◽  
Photocatalytic Property ◽  
Band Gap Energy ◽  
Photo Degradation ◽  
One Step ◽  
Electron Migration ◽  
Materials Used

Photocatalytic technology is widely used in water purification because of its environmental protection, high efficiency and energy saving. Therefore, it is extremely important for the selection and preparation of specific semiconductor materials used in the field of photocatalysis. In this work, 1T@2H MoS2 nanosheets were fabricated by simple hydrothermal method, and the photocatalytic property of as-prepared 1T@2H MoS2 were investigated by the photo-degradation of methylene blue (MB) water solutions under visible light irradiation via 2H MoS2.The results indicated that compared to 2H MoS2, the 1T@2H MoS2 exhibited more excellent photocatalytic degradation property. After 150 minutes of irradiation under visible light, 1T@2H MoS2 had a removal rate of 98% for MB, and 2H MoS2 eventually reached 19%. The enhancement photocatalytic property of 1T@2H MoS2 could be attributed to the reduced band gap energy of the hybrid-nanosheets and the increased in electron migration speed.

scholarly journals Synthesis and visible-light photocatalytic degradation of Ag3PO4/AgBr/hydroxyapatite ternary nanocomposites prepared from oyster shells

RSC Advances ◽  
2021 ◽  
Vol 11 (26) ◽  
pp. 15598-15607
Author(s):  
Sha Sha ◽  
Lei Zhang ◽  
Haijun Liu ◽  
Jingdi Chen ◽  
Yuju Che ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Efficiency ◽  
Organic Dyes ◽  
New Type ◽  
Visible Light Photocatalytic

A new type of Ag3PO4/AgBr/hydroxyapatite photocatalyst was prepared from oyster shells, which showed high efficiency in the degradation of organic dyes.

Facile solvothermal synthesis of a high-efficiency CNNs/Ag/AgCl plasmonic photocatalyst

2016 ◽  
Vol 18 (39) ◽  
pp. 27257-27264 ◽  
Author(s):  
Youliang Wang ◽  
Mingzhu Xia ◽  
Kebin Li ◽  
Xinlin Shen ◽  
Tahir Muhanmood ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Solvothermal Synthesis ◽  
High Efficiency ◽  
Plasmonic Photocatalyst ◽  
Agcl Nanoparticles ◽  
Degradation Ability

A CNNs/Ag/AgCl (defined as CNAAC) plasmonic photocatalyst with efficient photocatalytic degradation ability was obtained by depositing Ag/AgCl nanoparticles on g-C3N4 nanosheets (CNNS).

One-step synthesis of ZnS@MoS2 core–shell nanostructure for high efficiency photocatalytic degradation of tetracycline

2020 ◽  
Vol 44 (2) ◽  
pp. 472-477 ◽  
Author(s):  
Kejie Zhang ◽  
Wei Meng ◽  
Shouyu Wang ◽  
Hao Mi ◽  
Lei Sun ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Hydrothermal Method ◽  
High Efficiency ◽  
Core Shell ◽  
Facile Hydrothermal Method ◽  
One Step

Four kinds of ZnS@MoS2 nanocomposite photocatalysts were successfully prepared via a facile hydrothermal method.

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