Nickel-substituted zeolitic imidazolate frameworks for time-resolved alcohol sensing and photocatalysis under visible light

2014 ◽  
Vol 2 (16) ◽  
pp. 5724-5729 ◽  
Author(s):  
Rui Li ◽  
Xiaoqian Ren ◽  
Hongwei Ma ◽  
Xiao Feng ◽  
Zhengguo Lin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Mechanochemical Synthesis ◽  
Zeolitic Imidazolate Frameworks ◽  
One Pot ◽  
Time Resolved ◽  
Photo Catalytic Activity ◽  
Nickel Clusters ◽  
Ni Clusters

A facile strategy has been developed to introduce six-coordinated nickel clusters to zinc-based ZIF-8 structure via a one-pot mechanochemical synthesis. This Ni-substituted ZIF-8 can selectively pick different alcohol molecules and undergo a de-coordination to form stable four-coordinated Ni clusters which shows exceptional photo-catalytic activity.

scholarly journals Research on modified silicone compound photocatalyst by doping N

2018 ◽  
Vol 238 ◽  
pp. 03005
Author(s):  
DaWei Pan ◽  
GuangXu Shao ◽  
QingWen Zhang
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Nitrogen Content ◽  
Light Response ◽  
Visible Light Region ◽  
Reaction Efficiency ◽  
Nitrogen Doped ◽  
Photo Catalytic Activity ◽  
Composite Catalysts ◽  
Light Region

In order to improve the visible light response and reaction efficiency of nitrogen-doped TiO2 set urea as nitrogen source, and silica gel as the load reagent adopt sol-gel method to prepare powder of nitrogen-doped TiO2 supported on SiO2 , use equal volume impregnation method to load MnO2 on catalyst, and then obtain the composite photocatalyst after drying, and roasting .The prepared composite catalysts were characterized by XPS, TEM, SEM, XRD and other methods. Moreover, the photo-catalytic activity of the composite catalysts under visible-light region was tested, and the influences of nitrogen content and calcinations temperature on the photo-catalytic activity were investigated. The results show that:(1) the range of light response of modified composite catalyst was expanded from ultraviolet region to visible-light region, which results in high visible-light catalytic activity in the degradation of methyl orange.(2) Through the mechanism of photo-catalytic reaction and the treatment effect analysis, MnO2 as catalytic resulting O2 can be served as a good electronic capture agent and improve the reaction efficiency.(3)With the reduction of nitrogen content,and the increase of calcination temperature, the visible-light catalytic activity was weakened.(4) The activity of catalyst was reused six times, without significant reduction and had excellent efficiency and stability.

Visible light photo-catalytic activity of C-PVA/TiO2 composites for degrading rhodamine B

2015 ◽  
Vol 324 ◽  
pp. 645-651 ◽  
Author(s):  
Haigang Yang ◽  
Jianling Zhang ◽  
Yuanqing Song ◽  
Shoubin Xu ◽  
Long Jiang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Rhodamine B ◽  
Photo Catalytic Activity

VISIBLE LIGHT ACTIVE Cu2+/TiO2 NANOCATALYST FOR DEGRADATION OF DICHLORVOS

2012 ◽  
Vol 11 (05) ◽  
pp. 1250030 ◽  
Author(s):  
TESHOME ABDO SEGNE ◽  
SIVA RAO TIRUKKOVALLURI ◽  
SUBRAHMANYAM CHALLAPALLI
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Sol Gel ◽  
Light Illumination ◽  
X Ray ◽  
Photo Catalytic Activity ◽  
Visible Light Active ◽  
Adsorption Desorption

The advantage of doping of TiO2 with copper has been utilized for enhanced degradation of pesticide under visible light irradiation. The sol–gel method has been undertaken for the synthesis of copper-doped TiO2 by varying the dopant loadings from 0.25 wt.% to 1.0 wt.% of Cu2+ . The doped samples were characterized by UV-Visible Diffuse Reflectance Spectroscopy (DRS), N2 adsorption–desorption (BET), X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectrometry (EDS). The photocatalytic activity of the catalyst was tested by degradation of dichlorvos under visible light illumination. The results found that 0.75 wt.% of Cu2+ doped nanocatalysts have better photo catalytic activity than the rest of percentages doped, undoped TiO2 and Degussa P25. The reduction of band gap was estimated and the influence of the process parameters on photo catalytic activity of the catalyst has been explained.

Determination of photo-catalytic activity of un-doped and Mn-doped TiO2 anatase powders on acetaldehyde under UV and visible light

2011 ◽  
Vol 520 (4) ◽  
pp. 1195-1201 ◽  
Author(s):  
Vassileios C. Papadimitriou ◽  
Vassileios G. Stefanopoulos ◽  
Manolis N. Romanias ◽  
Panos Papagiannakopoulos ◽  
Kyriaki Sambani ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Doped Tio2 ◽  
Tio2 Anatase ◽  
Photo Catalytic Activity ◽  
Mn Doped

scholarly journals PHOTOCATALYTIC DEGRADATION OF RHODAMINE B USING Ag NANO DOPED TiO2 PREPARED BY -IRRADIATION METHOD

2016 ◽  
Vol 54 (4) ◽  
pp. 494
Author(s):  
Vo Thi Thu Nhu ◽  
Nguyen Ngoc Duy ◽  
Huynh Nguyen Anh Tuan ◽  
Nguyen Pham Tu Ngan ◽  
Do Quang Minh ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Rhodamine B ◽  
Bet Surface Area ◽  
Nano Tio2 ◽  
Photo Catalyst ◽  
Photo Catalytic Activity ◽  
Transmission Electron ◽  
Degussa P25 ◽  
Area X

Ag nano deposited on TiO2 (Degussa P25) (Ag nano/TiO2) photo-catalyst has been synthesized by g-irradiation method. The  characteristics  of  Ag nano/TiO2 material  has  been  investigated  by BET surface area, X-ray diffraction (XRD), transmission electron microscopy (TEM) and the diffuse reflectance spectra (DRS). The photo-catalytic properties of Ag nano/TiO2 for degradation of Rhodamine B in aqueous solution under visible light have been studied. Results indicated that Ag nano/TiO2 photo-catalyst exhibited better photo-catalytic activity compared to that of TiO2 under the same reaction condition. The higher activity of Ag nano/TiO2 is due the enhancement of electron–hole separation effect on the surface of the catalyst. At 1.5% Ag doping content, the Ag nano/ TiO2 photo-catalyst exhibited the highest photo-catalytic activity under visible light.

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