Microwave-assisted one-pot method for preparation of ZnO/AgI nanocomposites with highly enhanced photocatalytic activity under visible-light irradiation

2015 ◽  
Vol 57 (34) ◽  
pp. 16015-16023 ◽  
Author(s):  
Shirin Shaker-Agjekandy ◽  
Aziz Habibi-Yangjeh
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
One Pot ◽  
Microwave Assisted

One-pot preparation of AgBr/α-Ag2WO4 composite with superior photocatalytic activity under visible-light irradiation

2020 ◽  
Vol 586 ◽  
pp. 124079 ◽  
Author(s):  
Raja Arumugam Senthil ◽  
Sedahmed Osman ◽  
Junqing Pan ◽  
Abrar Khan ◽  
Viengkham Yang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
One Pot

scholarly journals In Situ g-C3N4@Zno Nanocomposite: One-Pot Hydrothermal Synthesis and Photocatalytic Performance under Visible Light Irradiation

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Lan Anh Luu Thi ◽  
Mateus Manuel Neto ◽  
Thang Pham Van ◽  
Trung Nguyen Ngoc ◽  
Tuyet Mai Nguyen Thi ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
High Efficiency ◽  
Diffuse Reflectance Spectroscopy ◽  
Light Irradiation ◽  
Nitrate Hexahydrate ◽  
One Pot ◽  
Simple Method

In situ g-C3N4@ZnO nanocomposites (with 0, 1, 3, 5, and 7 wt.% of g-C3N4 in nanocomposite) were synthesized via a one-pot hydrothermal method using precursors of urea, zinc nitrate hexahydrate, and hexamethylenetetramine. The g-C3N4@ZnO nanocomposites were characterized by X-ray diffraction, scanning electron microscope, diffuse reflectance spectroscopy, and photoluminescence spectroscopy. The photocatalyst activity of g-C3N4@ZnO nanocomposites was evaluated via methylene blue degradation experiment under visible light irradiation. The g-C3N4@ZnO nanocomposites showed an enhancement in photocatalytic activity in comparison to pure ZnO which increased with the g-C3N4 content (1, 3, 5, and 7 wt.%) in nanocomposites. The photocatalytic activity reached the highest efficiency of 96.8% when the content of g-C3N4 was 7.0 wt.%. Nanocomposite having 7.0 wt.% of g-C3N4 also showed good recyclability with degradation efficiency higher than 90% even in the 4th use. The improvement of photocatalytic activity could be attributed to the adsorption ability and effective separation of electron-hole pairs between g-C3N4 and ZnO. This work implies a simple method to in situ prepare the nanocomposite material of g-C3N4 and semiconductors oxide for photocatalyst applications with high efficiency and good recyclability.

scholarly journals One-Step Microwave-Assisted Synthesis and Visible-Light Photocatalytic Activity Enhancement of BiOBr/RGO Nanocomposites for Degradation of Methylene Blue

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4577
Author(s):  
Kun-Yauh Shih ◽  
Yen-Ling Kuan ◽  
En-Rui Wang
Keyword(s):  
Electron Microscopy ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Degradation Mechanism ◽  
Photogenerated Electron ◽  
Light Irradiation ◽  
Microwave Assisted ◽  
One Step

In this study, bismuth oxybromide/reduced graphene oxide (BiOBr/RGO), i.e. BiOBr-G nanocomposites, were synthesized using a one-step microwave-assisted method. The structure of the synthesized nanocomposites was characterized using Raman spectroscopy, X-ray diffractometry (XRD), photoluminescence (PL) emission spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), and ultraviolet-visible diffuse reflection spectroscopy (DRS). In addition, the ability of the nanocomposite to degrade methylene blue (MB) under visible light irradiation was investigated. The synthesized nanocomposite achieved an MB degradation rate of above 96% within 75 min of continuous visible light irradiation. In addition, the synthesized BiOBr-G nanocomposite exhibited significantly enhanced photocatalytic activity for the degradation of MB. Furthermore, the results revealed that the separation of the photogenerated electron–hole pairs in the BiOBr-G nanocomposite enhanced the ability of the nanocomposite to absorb visible light, thus improving the photocatalytic properties of the nanocomposites. Lastly, the MB photo-degradation mechanism of BiOBr-G was investigated, and the results revealed that the BiOBr-G nanocomposites exhibited good photocatalytic activity.

One-pot fabrication of 2D/2D HCa2Nb3O10/g-C3N4 type II heterojunctions towards enhanced photocatalytic H2 evolution under visible-light irradiation

2020 ◽  
Vol 10 (17) ◽  
pp. 5896-5902 ◽  
Author(s):  
Jinwen Shi ◽  
Liuhao Mao ◽  
Chongze Cai ◽  
Gaosheng Li ◽  
Cheng Cheng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Type Ii ◽  
H2 Evolution ◽  
One Pot ◽  
Composite Photocatalysts ◽  
Photocatalytic H2 Evolution

Effective 2D-composite photocatalysts, HCa2Nb3O10/g-C3N4, with enhanced photocatalytic activity are conveniently synthesized by a facile one-pot method.

Sign in / Sign up

Export Citation Format

Share Document