scholarly journals Facile Synthesis of N-Doped BiOCl Photocatalyst by an Ethylenediamine-Assisted Hydrothermal Method

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Guihua Chen ◽  
Gangling Chen ◽  
Yong Wang ◽  
Qingfeng Wang ◽  
Zhen Zhang
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Rhodamine B ◽  
Facile Synthesis ◽  
Nitrogen Doped ◽  
Tetragonal Crystal ◽  
Tetragonal Crystal Structure ◽  
The Stability

A nitrogen doped BiOCl (N-BiOCl) photocatalyst was synthesized and characterized using an ethylenediamine-assisted hydrothermal method. The N-BiOCl sample demonstrated the same tetragonal crystal structure as the as-prepared pure BiOCl sample. SEM results indicated that N-BiOCl sample was self-assembled by nanoplates to provide an aggregated flower-like microstructure. Doped nitrogen was substituted for oxygen in the crystal lattice of BiOCl, causing a red shift for N-BiOCl sample compared to BiOCl sample. The N-BiOCl sample exhibited higher photocatalytic activity in the degradation of Rhodamine B under visible light than observed in BiOCl sample, and the stability of the sample was verified. Meanwhile, speculative causes for the enhancement in the photocatalytic activity of N-BiOCl sample were also proposed.

scholarly journals Improving the photocatalytic activity of nitrogen-doped surface defect TiO2-x nanobelts for degradation of organic pollutants

2020 ◽  
pp. 174751982093867
Author(s):  
Zhen Zhang ◽  
Shao-dong Qin ◽  
Jing-yun Chen ◽  
Jing Li ◽  
Ai-hua Xing
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Pollutants ◽  
Rhodamine B ◽  
Light Absorption ◽  
Surface Defect ◽  
Separation Efficiency ◽  
Visible Light Absorption ◽  
Nitrogen Doped ◽  
N Doping

The synthesis of surface defect TiO2-x nanobelts with excellent visible light absorption is important to reduce costs, increase stability, and improve photocatalytic activity. In this work, we report that nitrogen-doped surface defect TiO2-x nanobelts are synthesized by annealing pristine TiO2 nanobelts in Ar/H2 (95%/5%) atmosphere followed by subsequent heat treatment in NH3 at various temperatures. The aim is to study the effect of the extent of the N-doping amount in the lattice of TiO2-x nanobelts on light absorption and photocatalytic activity. Considering the increase in organic pollutants in wastewater, the photocatalytic activity is measured by degrading rhodamine B (RhB) dye in water. The results demonstrate that the calcination temperature affects the doping level of N, and the b-TiO2-N550 sample exhibits higher photocatalytic performance than that of other samples under visible-light irradiation for the degradation of rhodamine B, which is up to 96.11%. The enhancement is ascribed to the synergistic effect of N-doping and self-doping oxygen vacancy (which extend the visible light absorption) and the separation efficiency of photogenerated carriers, which improves the photocatalytic activity.

Enhanced Photocatalytic Performance of Iodine Doped Bi2WO6 Nanostructures under Visible-Light Irradiation

2013 ◽  
Vol 423-426 ◽  
pp. 163-166 ◽  
Author(s):  
Bao Wei Cao ◽  
Yun Hua Xu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Absorption Spectra ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Red Shift ◽  
Light Irradiation ◽  
Photocatalytic Activities

Bi2WO6 doped with iodine ions were synthesized using hydrothermal method and their photocatalytic activities to degrade Rhodamine B (RhB) under visible-light was investigated. The successful incorporation of I ions in Bi2WO6 was proved by XRD and XPS. UV-vis absorption spectra results show that I ion was successfully doped into Bi2WO6 and a red shift for I-doped Bi2WO6 appeared when compared to pure Bi2WO6. The photocatalytic activities of the photocatalysts were evaluated by the decolorization of RhB under visible-light irradiation. The results showed that the photocatalytic activity of I-doped Bi2WO6 was much higher than the undoped Bi2WO6.

LaCO3OH improving photocatalytic activity of In(OH)3/In2S3 heterostructures

2019 ◽  
Vol 12 (05) ◽  
pp. 1950077
Author(s):  
Lan Guo ◽  
Xin Jin ◽  
Zhaodi Xu ◽  
Aiping Yan ◽  
Yiqun Wan
Keyword(s):  
Waste Water ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Rhodamine B ◽  
Effective Separation ◽  
Adsorption Capability ◽  
Proper Energy

Lanthanum hydroxycarbonate (LaCO3OH), a kind of fluorescence materials, was less studied in application for photocatalysis. In this paper, LaCO3OH/In(OH)3/In2S3 (LCO/IO/IS) heterostructures were firstly synthesized by a mild two-step hydrothermal method and investigated by various technologies. The activity of as-prepared samples was evaluated by the degradation of Rhodamine B (RhB) under visible light ([Formula: see text][Formula: see text]nm). When the content of LaCO3OH is 15[Formula: see text]mol.% (La/In), the obtained sample exhibits the highest performance, beyond two times as high as that of In(OH)3/In2S3. The improved photodegradation activity might be ascribed to higher adsorption capability and photosensitization of RhB due to proper energy structures of the heterostructures, which prompts the effective separation of electrons and holes. This work extends the application of rear earth salts (lanthanum hydroxycarbonate) for purification of dye waste water.

Synthesis of ultrathin g-C3N4/graphene nanocomposites with excellent visible-light photocatalytic performances

2019 ◽  
Vol 12 (03) ◽  
pp. 1950025 ◽  
Author(s):  
Shun Wang ◽  
Dongdong Lou ◽  
Zhaojie Wang ◽  
Nuo Yu ◽  
Haifeng Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Water Purification ◽  
Rhodamine B ◽  
Carbon Nitride ◽  
Graphene Nanocomposites ◽  
Excellent Photocatalytic Activity ◽  
Promising Application ◽  
Visible Light Photocatalytic

Graphitic carbon nitride (g-C3N[Formula: see text] has drawn increasing interest as an efficient photocatalyst. To further improve its photocatalytic activity, herein we coupled g-C3N4 with graphene to construct ultrathin g-C3N4/graphene (g-C3N4/G) nanocomposites by a pyrolysis-sonication-hydrothermal method. Under the illumination of visible-light, g-C3N4/G nanocomposites with 10[Formula: see text]wt.%G can degrade 92% Rhodamine B (RhB) in 120[Formula: see text]min, which is higher than that (57%) from pure g-C3N4. Moreover, the recycling experiment indicates that the nanocomposite still remains excellent photocatalytic stability. Therefore, g-C3N4/G nanocomposites exhibit excellent photocatalytic activity and stability, resulting in a promising application in water purification.

Synthesis of peroxo-titanium decorated H-titanate-nanotube-based hierarchical microspheres with enhanced visible-light photocatalytic activity in degradation of Rhodamine B

2014 ◽  
Vol 43 (39) ◽  
pp. 14537-14541 ◽  
Author(s):  
Yong Qiu ◽  
Xinjun Li
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Rhodamine B ◽  
Visible Light Photocatalytic Activity ◽  
Titanate Nanotube ◽  
Hierarchical Microspheres ◽  
Light Activity ◽  
Visible Light Photocatalytic

Peroxo-titanium decorated H-titanate-nanotube-based hierarchical microspheres were prepared by a hydrothermal method, and they exhibited enhanced visible-light activity.

scholarly journals Facile synthesis of Ag3VO4/β-AgVO3 nanowires with efficient visible-light photocatalytic activity

RSC Advances ◽  
2017 ◽  
Vol 7 (44) ◽  
pp. 27515-27521 ◽  
Author(s):  
Lei Gao ◽  
Zhonghua Li ◽  
Jiawen Liu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Chemical Precipitation ◽  
Facile Synthesis ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

Ag3VO4/β-AgVO3 nanocomposites were successfully fabricated by chemical precipitation and hydrothermal method.

scholarly journals Constructing BiOBr/g-C3N4/Bi2O2CO3 Z-Scheme Photocatalyst With Enhanced Photocatalytic Activity

2021 ◽  
Author(s):  
Biao Zhang ◽  
Yu Liu ◽  
Kanghong Zhou ◽  
Hongyu Zhu ◽  
Dongxu Gu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Rhodamine B ◽  
Charge Separation ◽  
Degradation Process ◽  
Reactive Species ◽  
Promising Material ◽  
Enhanced Absorption ◽  
Radical Trapping

Abstract Novel camellia-structured Z-scheme BiOBr/g-C3N4/Bi2O2CO3 was simply prepared by a hydrothermal method and photodegraded Rhodamine B under visible light within 60 min with much higher degradation efficiency (98%) contrasted with pure BiOBr, g-C3N4 and Bi2O2CO3. Radical trapping experiments exhibited the main reactive species (·O2-) during degradation process. The formation of Z-scheme heterojunction improved rate of charge separation, enhanced absorption of visible light and thus promoted the photocatalytic activity. The Z-scheme heterojunction is a promising material for the removal of dye in effluents.

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