Co3(PO4)2/Ag3PO4with enhanced simulated sunlight photocatalytic activity toward ofloxacin degradation and mechanism insight

2019 ◽  
Vol 94 (5) ◽  
pp. 1660-1669 ◽  
Author(s):  
Zhi Geng ◽  
Min Yang ◽  
Xin Qi ◽  
Zhaoyang Li ◽  
Xia Yang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Simulated Sunlight

Construction of LZU1@WO3 heterojunction photocatalysts: enhanced photocatalytic performance and mechanism insight

2021 ◽  
Vol 45 (36) ◽  
pp. 17025-17036
Author(s):  
Simin Shang ◽  
Huaizhi Yang ◽  
Dajun Shi ◽  
Bowen Dong ◽  
Heling Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Hybrid Materials ◽  
Photocatalytic Performance ◽  
Production Capacity ◽  
Simulated Sunlight ◽  
Composite Photocatalysts ◽  
Performance And Mechanism

Our well-designed nano-WO3@LZU1 composite photocatalysts were fully characterized. Under simulated sunlight, the hybrid materials showed much higher photocatalytic activity for BBR degradation and MB degradation than WO3 or LZU1, and improved hydrogen production capacity.

High photocatalytic activity of 2D sheet structure ZnO/Bi2WO6 Z-scheme heterojunction under simulated sunlight

2020 ◽  
Vol 53 (16) ◽  
pp. 165101
Author(s):  
Jihai Duan ◽  
Miyu Liu ◽  
Yue Guo ◽  
Weiwen Wang ◽  
Zisheng Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Simulated Sunlight ◽  
Sheet Structure

The Influence of Yb3+/Er3+ Co-Doped β-NaYF4 Up-Conversion Micron Tubes on Photocatalytic Activity of TiO2 for Degradation of Organic Dyes

2015 ◽  
Vol 1118 ◽  
pp. 211-216
Author(s):  
Yuan Liang Ma ◽  
Xue Rong Zheng ◽  
Wei Liu ◽  
Hai Qin Li ◽  
Hui Ming Ji
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Degradation Rate ◽  
Organic Dyes ◽  
Photocatalytic Efficiency ◽  
Simulated Sunlight ◽  
Combination Methods ◽  
Photocatalytic Activities ◽  
Pure Phase ◽  
Co Doped

Pure phase of Yb3+/Er3+ co-doped β-NaYF4 micron tubes with up-conversion fluorescence were synthesized by hydrothermal method at 180°C for 24 hours. For better utilization of sunlight and improving photocatalytic efficiency of organic dyes, TiO2 nanoparticles were modified by combining with β-NaYF4 micron tubes to form TiO2/NaYF4 composite. Three different combination methods were studied and the photocatalytic activities of the corresponding samples were tested by measuring the degradation rate of rhodamine aqueous solution under illumination of simulated sunlight. The composite that TiO2 nanoparticles were well dispersed on the surface of NaYF4 shows better photocatalytic activity than other composites and was near twice efficiency of pure TiO2 nanoparticles. The reason may be due to the high activity of heterostructure for TiO2/NaYF4 composite that will make it easy for sunlight absorption and photocatalytic degradation.

One-pot synthesis of echinus-like Fe-doped SnO2 with enhanced photocatalytic activity under simulated sunlight

2017 ◽  
Vol 695 ◽  
pp. 3318-3323 ◽  
Author(s):  
Jinhua Zhang ◽  
Jianfeng Ye ◽  
Hao Chen ◽  
Yang Qu ◽  
Qian Deng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Simulated Sunlight ◽  
One Pot ◽  
One Pot Synthesis

Enhanced Photocatalytic Performance and Mechanism of Ag3PO4 Particles Synthesized via a Sonochemical Process

2018 ◽  
Vol 10 (3) ◽  
pp. 337-345 ◽  
Author(s):  
Chengxiang Zheng ◽  
Hua Yang ◽  
Yang Yang ◽  
Haimin Zhang
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Ph Value ◽  
Dye Degradation ◽  
Sonochemical Method ◽  
Simulated Sunlight ◽  
Spherical Nanoparticles ◽  
Direct Oxidation

A facile sonochemical method was used to synthesize Ag3PO4 particles and the effect of pH value, reaction temperature and reaction time on the products was investigated. It is found that the samples prepared at neutral (pH = 7) and alkaline (pH = 11) environments exhibit a similar particle morphology and size. The particles are shaped like spheres with a size distribution majorly focusing on a range of 200–450 nm, and the average particle size is about 300 nm. The sample prepared at acidic environment (pH = 3) is composed of polyhedral microparticles with size of 5–8 μm. At relatively low temperatures of 20–50 °C, the spherical nanoparticles do not undergo obvious morphology/size changes; however, when the temperature is increased up to 80 °C, the nanoparticles are aggregated to form large-sized polyhedral microparticles in the size range of 4–7 μm. Compared to the pH value and reaction temperature, the reaction time has a minor effect on the morphology of Ag3PO4 particles. RhB was chosen as the target pollutant to evaluate the photocatalytic activity of the as-prepared Ag3PO4 samples under simulated-sunlight irradiation. It is shown that the samples consisting of spherical nanoparticles exhibit an extremely high photocatalytic activity, and the degradation percentage of RhB after reaction for 50 min reaches over 90%. The samples of polyhedral microparticles have a relatively low photocatalytic activity, which is possibly due to their large particle size. Hydroxyl (.OH) radical was detected by spectrofluorimetry using terephthalic acid as a .OH scavenger and was not found to be produced over the simulated-sunlight-irradiated Ag3PO4 catalyst. The effect of ethanol, benzoquinone and ammonium oxalate on dye degradation was also investigated. Based on experimental results, the direct oxidation by h+ is suggested to the dominant mechanism toward the dye degradation.

scholarly journals Growth Process and CQDs-modified Bi4Ti3O12 Square Plates with Enhanced Photocatalytic Performance

Micromachines ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 66 ◽  
Author(s):  
Xinxin Zhao ◽  
Hua Yang ◽  
Ziming Cui ◽  
Xiangxian Wang ◽  
Zao Yi
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Growth Process ◽  
Photocatalytic Performance ◽  
Simulated Sunlight ◽  
Hydrothermal Route ◽  
Electron Hole ◽  
X Ray ◽  
Photocurrent Spectroscopy

Bi4Ti3O12 square plates were synthesized via a hydrothermal route, and their growth process was systematically investigated. Carbon quantum dots (CQDs) were prepared using glucose as the carbon source, which were then assembled on the surface of Bi4Ti3O12 square plates via a hydrothermal route with the aim of enhancing the photocatalytic performance. XRD (X-ray powder diffraction), SEM (scanning electron microscopy), TEM (transmission electron microscopy), UV-vis DRS (diffuse reflectance spectroscopy), XPS (X-ray photoelectron spectroscopy), FTIR (Fourier transform infrared spectroscopy), PL (photoluminescence) spectroscopy, EIS (electrochemical impedance spectroscopy) and photocurrent spectroscopy were used to systematically characterize the as-prepared samples. It is demonstrated that the decoration of CQDs on Bi4Ti3O12 plates leads to an increased visible light absorption, slightly increased bandgap, increased photocurrent density, decreased charge-transfer resistance, and decreased PL intensity. Simulated sunlight and visible light were separately used as a light source to evaluate the photocatalytic activity of the samples toward the degradation of RhB in aqueous solution. Under both simulated sunlight and visible light irradiation, CQDs@Bi4Ti3O12 composites with an appropriate amount of CQDs exhibit obviously enhanced photocatalytic performance. However, the decoration of excessive CQDs gives rise to a decrease in the photocatalytic activity. The enhanced photocatalytic activity of CQDs-modified Bi4Ti3O12 can be attributed to the following reasons: (1) The electron transfer between Bi4Ti3O12 and CQDs promotes an efficient separation of photogenerated electron/hole pairs in Bi4Ti3O12; (2) the up-conversion photoluminescence emitted from CQDs could induce the generation of additional electron/hole pairs in Bi4Ti3O12; and (3) the photoexcited electrons in CQDs could participate in the photocatalytic reactions.

ZnO nanoparticles photocatalytic activity toward atmospheric toluene under simulated sunlight

2019 ◽  
Vol 46 (1) ◽  
pp. 119-131 ◽  
Author(s):  
Ahmad Jonidi Jafari ◽  
Roshanak Rezaei Kalantari ◽  
Majid Kermani ◽  
Masoumeh Hasham Firooz
Keyword(s):  
Photocatalytic Activity ◽  
Zno Nanoparticles ◽  
Simulated Sunlight
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