ZIF-8 derived ZnO/Zn6Al2O9/Al2O3 nanocomposite with excellent photocatalytic performance under simulated sunlight irradiation

2019 ◽  
Vol 43 (7) ◽  
pp. 2990-2999 ◽  
Author(s):  
Li Zhang ◽  
Qingman Liang ◽  
Peng Yang ◽  
Yang Huang ◽  
Younian Liu ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
Simulated Sunlight ◽  
High Concentration ◽  
Sunlight Irradiation ◽  
Degradation Activity

The ZIF-8 derived ZnO/Zn6Al2O9/Al2O3 nanocomposite exhibits an unprecedented photocatalytic degradation activity toward MO of high concentration.

The Study on the Influential Factors of Photocatalytic Performance of Eosin-Sensitized TiO2 Nanoparticles

2013 ◽  
Vol 827 ◽  
pp. 3-7
Author(s):  
Shun Jiang He ◽  
Xue Yan Du ◽  
Qiao Wang ◽  
Jing Xu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Influential Factors ◽  
Sunlight Irradiation ◽  
Sensitization Time

The photocatalytic activity of eosin-sensitized TiO2 nanoparticles on photocatalytic degradation rate (PDR) of methyl orange under sunlight irradiation was studied. The influential factors on the degradation, such as eosin concentration, TiO2 dosage, sensitization time and sensitization temperature were also investigated. The results show that: The performance of TiO2 nanoparticles for PDR of methyl orange has been improved obviously for eosin sensitizing. The PDR of methyl orange reached 45.28% under the conditions of eosin concentration of 20mg/L, TiO2 dosage of 0.5000g/L, sensitization time of 24h and sensitization temperature of 20°C.

Preparation and High Degradation Activity of Supported Nano-Bi2WO6–TiO2/Nickel Foam Photocatalyst

NANO ◽  
2015 ◽  
Vol 10 (06) ◽  
pp. 1550077 ◽  
Author(s):  
Qin Tong ◽  
Ya-Mei Dong ◽  
Xiao-Jia Wang ◽  
Peng Yan ◽  
Dan-Nong He
Keyword(s):  
Thermal Stability ◽  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Nickel Foam ◽  
High Photocatalytic Activity ◽  
Silica Sol ◽  
Sunlight Irradiation ◽  
Highly Dispersed ◽  
Degradation Activity ◽  
Spraying Method

The supported nano- Bi 2 WO 6– TiO 2/nickel foam photocatalyst was synthesized via spraying method with silica sol as a binder. The as-prepared photocatalyst with large surface and thermal stability exhibited enhanced photocatalytic performance for degradation of Rhodamine B ( RhB ) solution in sunlight irradiation. The results showed that the RhB solution could be degraded to 71.6% within 60min, exhibiting that improved photocatalytic activity increased by 77.6%, compared with that of pure Bi 2 WO 6– TiO 2 nanoparticles. Its high photocatalytic activity was due to the presence of nickel foam in the catalytic process, making the Bi 2 WO 6– TiO 2 highly dispersed and increasing the contact area of the photocatalysts with the organic pollutants. At the same time, a possible photocatalytic mechanism for the enhanced photocatalytic performance was investigated.

scholarly journals Preparation ofBiFeO3-Graphene Nanocomposites and Their Enhanced Photocatalytic Activities

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
J. F. Dai ◽  
T. Xian ◽  
L. J. Di ◽  
H. Yang
Keyword(s):  
Photocatalytic Performance ◽  
Ethanol Solution ◽  
Oh Radicals ◽  
Simulated Sunlight ◽  
Sunlight Irradiation ◽  
Graphene Nanocomposites ◽  
Photogenerated Electrons ◽  
Photocatalytic Activities ◽  
Enhanced Yield ◽  
Efficient Transfer

BiFeO3nanoparticles were prepared via a polyacrylamide gel route. BiFeO3-graphene nanocomposites were fabricated by mixing BiFeO3nanoparticles and graphene into absolute ethanol solution followed by thermal drying. The TEM observation demonstrates that the BiFeO3nanoparticles are well anchored onto graphene sheets. The photocatalytic activities of the as-prepared samples were evaluated by the degradation of methyl orange (MO) under simulated sunlight irradiation. Compared to bare BiFeO3nanoparticles, BiFeO3-graphene nanocomposites exhibit enhanced photocatalytic activity. The outstanding photocatalytic performance is mainly ascribed to the efficient transfer of photogenerated electrons from BiFeO3to graphene, thus leading to an increased availability of h+for the photocatalytic reaction. In addition, hydroxyl (·OH) radicals were detected by the photoluminescence technique using terephthalic acid as a probe molecule and are found to be produced on the irradiated BiFeO3and BiFeO3-graphene nanocomposites; in particular, an enhanced yield is observed for the latter.

scholarly journals Removal of methyl orange (MO) using carbon quantum dots (CQDs) derived from watermelon rinds

2019 ◽  
Vol 6 (1) ◽  
pp. 91-99
Author(s):  
Azrina Abd Aziz ◽  
U.R. Ramzilah
Keyword(s):  
Quantum Dots ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Carbon Quantum Dots ◽  
Facile Hydrothermal Method ◽  
X Ray ◽  
Degradation Activity ◽  
Scanning Electron

In this study, carbon quantum dots (CQDs) was prepared via a facile hydrothermal method. The objective for this study is to assess the performance of CQDs in photocatalytic degradation activity of methyl orange (MO) under artificial visible light source. For that reason, the prepared photocatalyst undergo further characterization by scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDX) and UV- Vis spectrophotometer (UV-VIS) to verify the morphology structure of the photocatalyst, elemental composition as well as the absorbance intensity, respectively. The results indicates that the prepared photocatalyst possess irregular porous shape with nanometre (nm) dimensions that can escalate the surface area for photocatalytic degradation activity. The elements of the photocatalyst mainly consist of carbon and oxygen as the major constituents in which necessary for photocatalytic activity with intense peak of absorbance intensity. The prepared CQDs also shows an excellent photocatalytic performance over the MO with degradation rate of 68.9% within 120 minutes.

Synthesis of CdS/Nd2S3 nanocomposite with enhanced photocatalytic performance under simulated sunlight irradiation

2020 ◽  
Vol 189 ◽  
pp. 349-356
Author(s):  
Haihua Yang ◽  
Chaohua Dai ◽  
Lingjie Jiang ◽  
Li Zhang ◽  
Jianhui Yan
Keyword(s):  
Photocatalytic Performance ◽  
Simulated Sunlight ◽  
Sunlight Irradiation
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