Synthesis, characterization and enhanced visible-light photocatalytic activity of novel NiO/HTi2NbO7nanocomposite

2018 ◽  
Vol 42 (12) ◽  
pp. 10279-10289 ◽  
Author(s):  
Jie Li ◽  
Lei Xu ◽  
Jie He ◽  
Lifang Hu ◽  
Liangguo Da ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Recombination Rate ◽  
Crucial Role ◽  
Electron Hole ◽  
Visible Light Photocatalytic Activity ◽  
Hole Recombination ◽  
Visible Light Photocatalytic

The decreased electron–hole recombination rate of the NiO/HTi2NbO7nanocomposite plays a crucial role in improving visible-light photocatalytic activity.

In situ bubble template promoted facile preparation of porous g-C3N4 with excellent visible-light photocatalytic performance

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63264-63270 ◽  
Author(s):  
Lei Shi ◽  
Lin Liang ◽  
Fangxiao Wang ◽  
Mengshuai Liu ◽  
Tao Liang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Recombination Rate ◽  
Photocatalytic Performance ◽  
Electron Hole ◽  
Facile Preparation ◽  
Bubble Template ◽  
Splitting Water ◽  
Visible Light Photocatalytic

pg-C3N4 prepared through in situ bubble template showed large surface area and low recombination rate of photoinduced electron–hole pairs, leading to enhanced visible-light photocatalytic activity for degrading pollutants and splitting water to H2.

Influence of Pt and Pd Modification on the Visible Light Photocatalytic Activity of N-Doped Titania Photocatalysts

2016 ◽  
Vol 16 (4) ◽  
pp. 3570-3576 ◽  
Author(s):  
Yulong Hu ◽  
Fu Dong ◽  
Hongfang Liu ◽  
Xingpeng Guo
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Metallic State ◽  
Visible Light Region ◽  
Electron Hole ◽  
X Ray ◽  
Visible Light Photocatalytic Activity ◽  
Light Region ◽  
Doped Titania ◽  
Visible Light Photocatalytic

Pd and Pt modified N-doped titania nanoparticle powders were prepared by a facile sol–gel method. Nitrogen doping and metal modification were carried out simultaneously during the preparation process. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy and X-ray photoelectron spectroscopy (XPS). The visible light photocatalytic activities of the asprepared samples were evaluated by analyzing their effect on the photocatalytic decomposition of methyl orange (MO). The chemical state of the metal is the key factor determining the performance of metal modified N-doped titania. The Pd used to modify the N-doped titania (Pd-NT) in our study was of the PdOx(x≤2) species, which increased the absorbance in the visible light region, decreased the recombination of photo-generated electron–hole pairs, and resulted in a significant enhancement in the visible light photocatalytic activity. The Pt species used to modify the N-doped titania (Pt-NT) was mainly in the metallic state, which resulted in a decrease in the absorbance in the visible light region, and an increase in the recombination of photo-generated electron–hole pairs. Pt modification led to a deterioration in the visible light photocatalytic activity of the material.

KCl-mediated dual electronic channels in layered g-C3N4 for enhanced visible light photocatalytic NO removal

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 8066-8074 ◽  
Author(s):  
Ting Xiong ◽  
Hong Wang ◽  
Ying Zhou ◽  
Yanjuan Sun ◽  
Wanglai Cen ◽  
...  
Keyword(s):  
Visible Light ◽  
Recombination Rate ◽  
Charge Carriers ◽  
Electron Hole ◽  
No Removal ◽  
Electronic Channel ◽  
Hole Recombination ◽  
Electronic Channels ◽  
Co Doped ◽  
Visible Light Photocatalytic

K and Cl ions co-doped into a g-C3N4 interlayer function as a dual electronic channel for electron and hole transfer, thus effectively decreasing the electron–hole recombination rate and prolonging the lifetime of charge carriers.

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

Sign in / Sign up

Export Citation Format

Share Document