scholarly journals Full-Spectrum Photocatalytic Activity of ZnO/CuO/ZnFe2O4 Nanocomposite as a PhotoFenton-Like Catalyst

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 557 ◽  
Author(s):  
Zhenzhen Li ◽  
Huabin Chen ◽  
Wenxia Liu

Deriving photocatalysts by the calcination of hydrotalcite-like compounds has attracted growing interest for extending their photocatalytic activity to the visible and even near-infrared (NIR) light regions. Herein, we describe the acquisition of a ZnO/CuO/ZnFe2O4 nanocomposite with good photoFenton-like catalytic activity under UV, visible and near-infrared (NIR) light irradiation by optimizing the calcination temperature of the coprecipitation product of Zn2+, Cu2+ and Fe3+. The ZnO/CuO/ZnFe2O4 nanocomposite is composed of symbiotic crystals of ZnO, CuO and ZnFe2O4, which enable the nanocomposite to show absorption in the UV, visible and NIR light regions and to produce a transient photocurrent in the presence of H2O2 under NIR irradiation. The full-spectrum photoFenton-like catalyst shows improved performance for the degradation of methyl orange with an increasing amount of H2O2 and is very stable in the recycling process. We believe that the ZnO/CuO/ZnFe2O4 nanocomposite is a promising full-spectrum photoFenton-like catalyst for the degradation of organic pollutants.

2017 ◽  
Vol 7 (18) ◽  
pp. 4193-4205 ◽  
Author(s):  
Xiaolin Hu ◽  
Xiang Liu ◽  
Jian Tian ◽  
Yujie Li ◽  
Hongzhi Cui

We prepare an all-solid-state Z-scheme photocatalyst (RGO–Ag2O/TiO2 composites) for photocatalytic degradation of tetracycline under UV, visible and NIR light irradiation.


RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23846-23850 ◽  
Author(s):  
Junfang Li ◽  
Wentao Li ◽  
Xinshi Li ◽  
Yahui Li ◽  
Hua Bai ◽  
...  

Plasmonic TiO2/W18O49 hybrid nanosheets have been synthesized through an in situ solvothermal growth method. This hybrid catalyst exhibits broad spectrum light harvesting and photocatalytic activity under full-spectrum, UV, visible, and NIR light.


Nanoscale ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 2380-2387 ◽  
Author(s):  
Huang Wen ◽  
Hua Li ◽  
Suisui He ◽  
Fengjuan Chen ◽  
Erli Ding ◽  
...  

The reversed growth of 2D core–shell CuFeSe2@Au heterostructured nanosheets with a crystalline shell and an amorphous core were first prepared and show enhanced photocatalytic activity for water oxidation under NIR light irradiation.


2016 ◽  
Vol 52 (38) ◽  
pp. 6431-6434 ◽  
Author(s):  
Lihua Zhi ◽  
Haoli Zhang ◽  
Zhengyin Yang ◽  
Weisheng Liu ◽  
Baodui Wang

The three-dimensional porous Fe3O4@Cu2−xS–MoS2 framework is reported for the first time. Such a hybrid framework exhibits excellent NIR-light photocatalytic activity and stable cycling for the direct arylation of heteroaromatics at room temperature.


Nanomaterials ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 534 ◽  
Author(s):  
Wen Ge ◽  
Zhiang Li ◽  
Tong Chen ◽  
Min Liu ◽  
Yalin Lu

Bi6Fe1.9Co0.1Ti3O18 (BFCTO)/NaGdF4:Yb3+, Er3+ (NGF) nanohybrids were successively synthesized by the hydrothermal process followed by anassembly method, and BFCTO-1.0/NGF nanosheets, BFCTO-1.5/NGF nanoplates and BFCTO-2.0/NGF truncated tetragonal bipyramids were obtained when 1.0, 1.5 and 2.0 M NaOH were adopted, respectively. Under the irradiation of 980 nm light, all the BFCTO samples exhibited no activity in degrading Rhodamine B (RhB). In contrast, with the loading of NGF upconversion nanoparticles, all the BFCTO/NGF samples exhibited extended near-infrared photoactivity, with BFCTO-1.5/NGF showing the best photocatalytic activity, which could be attributed to the effect of {001} and {117} crystal facets with the optimal ratio. In addition, the ferromagnetic properties of the BFCTO/NGF samples indicated their potential as novel, recyclable and efficient near-infrared (NIR) light-driven photocatalysts.


Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 413 ◽  
Author(s):  
Huanchun Wang ◽  
Zheng Xie ◽  
Xuanjun Wang ◽  
Ying Jia

Photocatalysts with a superior activity range, from ultraviolet (UV) to near-infrared (NIR) light, are attractive for solar utilization. From this perspective, sulfides are promising due to their narrower bandgap than oxides. In this report, NaBiS2 was synthesized hydrothermally under mild conditions by adjusting the alkaline amount. The rough NaBiS2 nanosheets possessed various surface atomic configurations on their surfaces, including amorphous clusters and amorphous nano-domains, revealed by HRTEM. A theoretical investigation of the band structure employing the density functional theory (DFT) method for the first time indicated that NaBiS2 is an indirect bandgap semiconductor with a narrow bandgap of 1.02 eV. Experimentally, it showed excellent photocatalytic activity for the degradation of methyl blue under UV, visible light and NIR light due to its experimental bandgap width of 1.32 eV. A degradation rate of 99.6% was reached after 80 min under full spectrum irradiation.


Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 577
Author(s):  
Enrique Contreras ◽  
Christian Palacios ◽  
I. Brian Becerril-Castro ◽  
José M. Romo-Herrera

Micro/nanomachines (MNMs) correspond to human-made devices with motion in aqueous solutions. There are different routes for powering these devices. Light-driven MNMs are gaining increasing attention as fuel-free devices. On the other hand, Plasmonic nanoparticles (NPs) and their photocatalytic activity have shown great potential for photochemistry reactions. Here we review several photocatalyst nanosystems, with a special emphasis in Plasmon induced photocatalytic reactions, as a novel proposal to be explored by the MNMs community in order to extend the light-driven motion of MNMs harnessing the visible and near-infrared (NIR) light spectrum.


RSC Advances ◽  
2021 ◽  
Vol 11 (44) ◽  
pp. 27257-27266
Author(s):  
Xiaodong Zhu ◽  
Juan Wang ◽  
Daixiong Yang ◽  
Jiawei Liu ◽  
Lili He ◽  
...  

Ag–ZnO heterojunction promotes the separation of photogenerated pairs and thus exhibits high catalytic activity under UV-visible light.


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