Facile Ionic Liquid Combustion Synthesis and Visible-light Photocatalytic Ability of Mesoporous FeAl2O4 with High Specific Surface Area

2014 ◽  
Vol 43 (11) ◽  
pp. 1743-1745 ◽  
Author(s):  
Mei-juan Chai ◽  
Xiang-min Chen ◽  
Ye Zhao ◽  
Rui-hong Liu ◽  
Jun Zhao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Visible Light ◽  
Specific Surface ◽  
Combustion Synthesis ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Photocatalytic Ability ◽  
Liquid Combustion ◽  
Visible Light Photocatalytic

Preparation, Characterization and Visible-Light Photocatalytic Properties of BiOCl/BiOI Nanocomposites

2012 ◽  
Vol 586 ◽  
pp. 10-17 ◽  
Author(s):  
Kai Jin Huang ◽  
Hou Guang Liu ◽  
Fang Li Yuan ◽  
Chang Sheng Xie
Keyword(s):  
Visible Light ◽  
Specific Surface ◽  
Surface Area ◽  
Quantum Efficiency ◽  
Specific Surface Area ◽  
Light Absorption ◽  
Critical Factor ◽  
Photocatalytic Properties ◽  
Impregnation Method ◽  
Visible Light Photocatalytic

BiOCl/BiOI nanocomposites were synthesized using a thermal impregnation method for the first time. The intense visible-light absorption and large specific surface area gave 4wt.％BiOCl/BiOI nanocomposites the best visible-light photocatalytic properties among all the catalysts for the photodegradation of methyl orange,about 78％ after 2 h. But decreased activities were obtained with the increase of BiOCl content in the nanocomposites. Considering the light absorption,specific surface area and the quantum efficiency, the high recombination of the photoinduced electron-hole pairs of the catalysts that lowed the quantum efficiency was believed to be the critical factor for their decreased photocatalytic activities.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF PHOTOCATALYS Fe2O3 PILLARED MONTMORILLONITE DOPED TiO2 AND ITS APPLICATION FOR RHODAMINE B PHODODEGRADATION USING VISIBLE LIGHT IRRADIATION

Jurnal Kimia ◽  
2020 ◽  
pp. 82
Author(s):  
D. A. D. N. Dewi ◽  
I N. Simpen ◽  
I W. Suarsa
Keyword(s):  
Visible Light ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Rhodamine B ◽  
High Specific Surface Area ◽  
Montmorillonite Clay ◽  
Pillared Montmorillonite ◽  
Bet Method ◽  
Acid And Base

A montmorillonite clay modified with semiconductor metal can act as a photocatalyst material. Montmorillonite clays were chosen because of their natural characteristics which are easily to be modified and have high specific surface area. This research aims to modify montmorillonite clay into photocatalyst material. The montmorillonite clay was intercalated using Fe2O3 to produce Fe2O3-pillared montmorillonite clay, then doped with TiO2 to form a photocatalyst material Fe2O3-PILC / TiO2. Modifications were intended to increase the specific surface area and number of active photocatalyst sites and thus increase the ability of photodegradation. The characterization carried out included characterizing the pillar formation using X-ray Diffraction (XRD), specific surface area by the BET method (Bruneau, Emmet, and Teller), a the number of surface acid-base sites by the titration method. Photocatalyst with the best character was Fe2O3-PILC / TiO2 1: 3 with specific surface area, number of acid and base sites respectively 45,947 m2/g, 20,1736 x 1023 sites/gram and 19,0044 x 1023 sites/gram. The result of photodegradation at optimum condition with visible light at pH 3 using 400 mg photocatalyst was 99.84%.   Keywords: photocatalyst, Fe2O3, montmorillonite clay, TiO2, rhodamine B

scholarly journals Enhanced Visible Light Photocatalytic Reduction of Cr(VI) over a Novel Square Nanotube Poly(Triazine Imide)/TiO2 Heterojunction

Catalysts ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 55 ◽  
Author(s):  
Xin Yan ◽  
Guotao Ning ◽  
Peng Zhao
Keyword(s):  
Visible Light ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Low Cost ◽  
High Specific Surface Area ◽  
Electron Hole ◽  
Graphite Phase ◽  
Reduction Efficiency ◽  
The One

Hexavalent chromium Cr(VI) pollution makes has a harmful impact on human health and the ecological environment. Photocatalysis reduction technology exhibits low energy consumption, high reduction efficiency and stable performance, and is playing an increasingly important role in chromium pollution control. Graphite-phase carbon nitride has been used to reduce Cr(VI) to the less harmful Cr(III) due to its visible light catalytic activity, chemical stability and low cost. However, it has a low specific surface area and fast recombination of electron–hole pairs, which severely restrict its practical application. In this work, a TiO2-modified poly(triazine imide) (PTI) square nanotube was prepared by the one-step molten salts method. The results showed the PTI had a square hollow nanotube morphology, with an about 100–1000 nm width and 60–70 nm thickness. During the formation of the PTI square tube, TiO2 nanoparticles adhere to the surface of the square tube wall by strong adsorption, and eventually form a PTI/TiO2 heterojunction. The PTI/TiO2-7 wt% heterojunction exhibited very good Cr(VI) reduction efficiency within 120 min. The enhanced photocatalytic activity was mainly attributed to the efficient separation and transport of photo-induced electron–hole pairs and the high specific surface area in the heterojunction structure.

One-step synthesis of spherical NaTaO3 and graphene spherical NaTaO3 nanoparticles with enhanced photocatalytic activity for NO purification

2018 ◽  
Vol 11 (04) ◽  
pp. 1850070 ◽  
Author(s):  
Zimao Ding ◽  
Sheng Guo ◽  
Xiaoyong Wu ◽  
Hussain Fida
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Uv Irradiation ◽  
Mixed Solution ◽  
One Pot ◽  
Photocatalytic Ability ◽  
Water Glycerol

To obtain efficient photocatalytic air purification, a series of NaTaO3 nanoparticles were successfully synthesized through a one-pot solvothermal approach, using water/glycerol mixed solution as solvent. The glycerol not only played an important role for controlling the morphology and particle size, but also remarkably enhanced the specific surface area of the as-prepared NaTaO3. Under optimal conditions, the spherical NaTaO3 (NaTaO3-30) exhibited much higher deNO[Formula: see text] performance under UV irradiation as compared to the cubic NaTaO3 (NaTaO3-0). Furthermore, the graphene spherical NaTaO3 composites were also prepared to further enhance the visible light driven photocatalytic ability of spherical NaTaO3. When 1[Formula: see text]wt.% graphene was loaded, the spherical NaTaO3/graphene showed excellent performance for continuous NO gas destruction under UV irradiation, short wavelength visible light ([Formula: see text][Formula: see text]nm) and even long wavelength visible light ([Formula: see text][Formula: see text]nm), which was superior to spherical NaTaO3 and cubic NaTaO3/graphene. The increased specific surface area, expanded light absorption and accelerated electron transport were responsible for the enhanced photocatalytic activity of the composite. The present work may shed new light on the synthesis of novel perovskite-type NaTaO3-based catalysts with excellent photocatalytic performance.

Nitrogen Doping to Metatitanic Acid by NH3 Heat Treatment for Achieving Visible-Light-Responsive Photocatalytic Activity

2013 ◽  
Vol 761 ◽  
pp. 35-39
Author(s):  
Se Keun Park ◽  
Jun Ho Eun ◽  
Hyun Ho Shin
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Nitrogen Doping ◽  
High Specific Surface Area ◽  
Metatitanic Acid ◽  
Heat Treated

Nitrogen doping can be achieved by heating TiO2-based photocatalyst powders under dopant-generating atmospheres such as NH3. In the present work, metatitanic acid (MTA) powder was used as a raw material to obtain nitrogen-doped titania using heat treatment in NH3flow. MTA is an industrially available intermediate product in sulfate process for TiO2production, which is mesoporous material with high specific surface area. The MTA powder was heat-treated in flowing NH3at 400–550°C. For comparison, commercial P25 TiO2powder was heat-treated under the same conditions. The results show that nitrogen dopant can be successfully incorporated into the MTA by heating in NH3 atmosphere. This obviously results in the enhanced visible-light photocatalytic activity, especially in MTA sample heated at 400°C. Due to the fascinating properties of MTA powder such as high specific surface area, the N-doping effect on MTA powder is much higher than the P25 TiO2powder.

scholarly journals Construction of SnO2/graphene-like g-C3N4 with enhanced visible light photocatalytic activity

RSC Advances ◽  
2017 ◽  
Vol 7 (57) ◽  
pp. 36101-36111 ◽  
Author(s):  
Haiyan Ji ◽  
Yamin Fan ◽  
Jia Yan ◽  
Yuanguo Xu ◽  
Xiaojie She ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Specific Surface ◽  
Hydrothermal Method ◽  
Surface Area ◽  
Specific Surface Area ◽  
Photocatalytic Performance ◽  
Large Specific Surface Area ◽  
Environmental Friendly ◽  
Visible Light Photocatalytic

2D/2D SnO2/GL-C3N4 photocatalysts with large specific surface area and high coupling heterointerface extent were synthesized by an environmental friendly hydrothermal method, showing excellent photocatalytic performance on RhB degradation.

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