Uniform SnO2 Hexagonal Prisms with Enhanced Photocatalytic Performance

2021 ◽  
Vol 16 (4) ◽  
pp. 624-629
Author(s):  
Yingxin Zhang ◽  
Xiaoxiong Song ◽  
Li Cui
Keyword(s):  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Uv Irradiation ◽  
Potential Application ◽  
Tin Dioxide ◽  
Photocatalytic Performance ◽  
Organic Dyes ◽  
Hydrothermal Route ◽  
One Step

In this work, SnO2 hexagonal prisms are successfully prepared by a simple one-step hydrothermal route. The photocatalytic activity of the synthesized product is studied through the degradation of several organic dyes. It shows that eosin red solution is almost degraded after 25 min with UV irradiation. The photodegradation of SnO2 samples with different morphologies and commercial tin dioxide powders are also compared. The as-prepared products exhibit excellent photocatalytic stability, revealing its potential application in the removal of organic pollutants from wastewater.

The Preparation of BiOCl Microspheres and its Photocatalytic Performance

2012 ◽  
Vol 487 ◽  
pp. 841-844 ◽  
Author(s):  
Xiao Chao Du ◽  
Wen Wen Zhao ◽  
Ya Wei Liu ◽  
Xiang Ping Huang ◽  
Feng Mao
Keyword(s):  
Photocatalytic Activity ◽  
Uv Irradiation ◽  
Photocatalytic Performance ◽  
Absolute Ethanol ◽  
Heating Method ◽  
Excellent Photocatalytic Activity ◽  
One Step ◽  
Better Than

The BiOCl microspheres photocatalyst was obtained by a one-step alcohol-heating method. The reactants were Bi(NO3)3•5H2O、TiCl3 and absolute ethanol, and the sample was synthesized at 100°C and calcined at 600°C. It then characterized by XRD, SEM, UV-vis DRS. The results showed that the sample was microspheres, having excellent photocatalytic activity that the sample could degradate more than 94% of RhB in 65 minites which is better than P25 under UV irradiation.

scholarly journals Tuning the Morphological Structure and Photocatalytic Activity of Nitrogen-Doped (BiO)2CO3by the Hydrothermal Temperature

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Chongjun Wang ◽  
Zaiwang Zhao ◽  
Bin Luo ◽  
Min Fu ◽  
Fan Dong
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Photocatalytic Performance ◽  
Morphological Structure ◽  
Hydrothermal Temperature ◽  
Nitrogen Doped ◽  
Light Region ◽  
Efficient Performance ◽  
One Step

Various nitrogen-doped hierarchical (BiO)2CO3nanosheets architectures were synthesized by a facile one-step template-free hydrothermal method through controlling the hydrothermal temperature (HT). The as-synthesized samples were characterized by XRD, SEM, FT-IR, XPS, and UV-vis DRS. The photocatalytic activity of the samples was evaluated towards degradation of NO at ppb level in air under visible light (VIL). It was found that HT acted as a crucial factor in determining the morphology of the samples. The rosa chinensis-like, red camellia-like, and lamina-like of nitrogen-doped (BiO)2CO3(N-BOC) micro-/nanostructures can be selectively fabricated under hydrothermal temperatures of 150, 180, and 210°C. The thickness of the nanosheets was in direct proportion to the increasing HT. Nitrogen-doping can extend the light absorption spectra of (BiO)3CO3to visible light region and enhance the VIL photocatalytic activity. Especially, the red camellia-like N-BOC-180 exhibited the highest photocatalytic performance, superior to the well-known VIL-driven photocatalyst C-doped TiO2and N-doped TiO2. The high photocatalytic performance of N-BOC was attributed to the synergetic effects of enhanced visible light absorption, multiple light-reflections between the nanosheets, and accelerated transfer of reactants and product. This research could provide new insights to the development of excellent photocatalyst with efficient performance for pollution control.

Z-scheme TiO2@Ti3C2/Cd0.5Zn0.5S nanocomposites with efficient photocatalytic performance via one-step hydrothermal route

2020 ◽  
Vol 32 (1) ◽  
pp. 015706
Author(s):  
Qiao Yin ◽  
Zhenzhen Cao ◽  
Zhiyuan Wang ◽  
Jiaming Zhai ◽  
Mingliang Li ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Hydrothermal Route ◽  
One Step

scholarly journals Effect of iron doped titanium oxide encapsulated in alginate on photocatalytic activity for the removal of dye pollutants

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22311-22317 ◽  
Author(s):  
Soulaima Chkirida ◽  
Nadia Zari ◽  
Redouane Achour ◽  
Abou el kacem Qaiss ◽  
Rachid Bouhfid
Keyword(s):  
Photocatalytic Activity ◽  
Iron Oxide ◽  
Visible Light ◽  
Titanium Oxide ◽  
Organic Pollutants ◽  
Uv Irradiation ◽  
Dye Pollutants ◽  
Iron Doped

Iron oxide/titania oxide are encapsulated in alginate biopolymer. These bio-nanocomposites are suitable for the photodegradation of dissimilar organic pollutants under UV irradiation as well as visible light.

scholarly journals Facile synthesis of hierarchical ZnO microstructures with enhanced photocatalytic activity

2017 ◽  
Vol 35 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Leigang Miao ◽  
Biming Shi ◽  
Nawrat Stanislaw ◽  
Chaomin Mu ◽  
Kezhen Qi
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Facile Synthesis ◽  
Hydrothermal Route ◽  
X Ray ◽  
Zno Nanocrystals ◽  
Reaction Solution ◽  
Facile Hydrothermal Route ◽  
Exposed Facets ◽  
Scanning Electron

AbstractFlower-like ZnO microstructures were successfully synthesized via a facile hydrothermal route without using any surfactants. The morphology of these microstructures can be easily controlled by adjusting the pH of the reaction solution. The possible growth mechanism of ZnO hierarchical microstructures was proposed based on the X-ray powder diffraction (XRD) and scanning electron microscope (SEM) results. The photocatalytic activity studies of ZnO nanocrystals demonstrated their excellent photocatalytic performance in degrading aqueous methylene blue (MB) under UV-A light irradiation. This higher photocatalytic activity of the ZnO nanoplates was mainly attributed to the exposed facets with the higher surface energy.

scholarly journals Hydrothermal Synthesis of rGO/PbTiO3 Photocatalyst and Its Photocatalytic H2 Evolution Activity

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Chunyan Wang ◽  
Lianwei Shan ◽  
Dongyuan Song ◽  
Yanwei Xiao ◽  
Jagadeesh Suriyaprakash
Keyword(s):  
Photocatalytic Performance ◽  
H2 Evolution ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
X Ray ◽  
Transmission Electron ◽  
Reduced Graphene ◽  
Efficient Charge ◽  
One Step ◽  
Photocatalytic H2 Evolution

In this letter, we investigated the photocatalytic activity of the newly formed rGO/PbTiO3 composites, which are synthesized by a one-step hydrothermal route. By adjusting the amount of reduced graphene oxide (rGO) (0, 0.15, 0.30, 0.60, and 1.20 wt%) with the PbTiO3, we constructed various photocatalysts for this investigation. The crystal structure and morphology of the various composites were studied by powder X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). Photoelectron spectroscopic study revealed that the band structure of the newly formed composites and efficient charge separation can be obtained by the interfaces of various rGO content. In addition, the photocatalytic performance of the synthesized composites was explored by H2 evolution and rhodamine blue (RhB) degradation. The obtained results indicated that the addition of the appropriate amount of rGO could improve the activity of pure PbTiO3, significantly.

Uniform Chrysanthemum-Like Bi2S3 Microspheres for Dye-Sensitised Solar Cells

2012 ◽  
Vol 65 (9) ◽  
pp. 1342 ◽  
Author(s):  
Junfeng Wang ◽  
Zhao Liu ◽  
Shuming Yuan ◽  
Lu Liu ◽  
Zhen Zhou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Formation Mechanism ◽  
Potential Application ◽  
Counter Electrode ◽  
Soft Template ◽  
Hydrothermal Route ◽  
Photovoltaic Properties ◽  
One Step

3D uniform Bi2S3 chrysanthemum-like microspheres with 1D nanowire-assembly were prepared through a facile one-step hydrothermal route, using poly(vinylpyrrolidone) (PVP) as a soft template, and Bi(NO3)3 and thiourea as Bi and S sources, respectively. PVP molecules played an important role in the formation of uniform 3D Bi2S3 nanostructures. The reasonable formation mechanism of uniform chrysanthemum-shaped Bi2S3 microspheres was also proposed. Photovoltaic properties were studied preliminarily to demonstrate potential application in dye-sensitised solar cells for the replacement of scarce platinum as counter electrode.

The fabrication and the characterization of a TiO2/titanate nanohybrid for efficient hydrogen evolution

RSC Advances ◽  
2015 ◽  
Vol 5 (17) ◽  
pp. 13011-13015 ◽  
Author(s):  
Shien Guo ◽  
Hongyan Ning ◽  
Mingxia Li ◽  
Rong Hao ◽  
Yuting Luan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrothermal Route ◽  
One Step

A facile one-step hydrothermal route for a TiO2/titanate nanojunction has been developed for improving the photocatalytic activity of hydrogen evolution.

scholarly journals Growth Process and CQDs-modified Bi4Ti3O12 Square Plates with Enhanced Photocatalytic Performance

Micromachines ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 66 ◽  
Author(s):  
Xinxin Zhao ◽  
Hua Yang ◽  
Ziming Cui ◽  
Xiangxian Wang ◽  
Zao Yi
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Growth Process ◽  
Photocatalytic Performance ◽  
Simulated Sunlight ◽  
Hydrothermal Route ◽  
Electron Hole ◽  
X Ray ◽  
Photocurrent Spectroscopy

Bi4Ti3O12 square plates were synthesized via a hydrothermal route, and their growth process was systematically investigated. Carbon quantum dots (CQDs) were prepared using glucose as the carbon source, which were then assembled on the surface of Bi4Ti3O12 square plates via a hydrothermal route with the aim of enhancing the photocatalytic performance. XRD (X-ray powder diffraction), SEM (scanning electron microscopy), TEM (transmission electron microscopy), UV-vis DRS (diffuse reflectance spectroscopy), XPS (X-ray photoelectron spectroscopy), FTIR (Fourier transform infrared spectroscopy), PL (photoluminescence) spectroscopy, EIS (electrochemical impedance spectroscopy) and photocurrent spectroscopy were used to systematically characterize the as-prepared samples. It is demonstrated that the decoration of CQDs on Bi4Ti3O12 plates leads to an increased visible light absorption, slightly increased bandgap, increased photocurrent density, decreased charge-transfer resistance, and decreased PL intensity. Simulated sunlight and visible light were separately used as a light source to evaluate the photocatalytic activity of the samples toward the degradation of RhB in aqueous solution. Under both simulated sunlight and visible light irradiation, CQDs@Bi4Ti3O12 composites with an appropriate amount of CQDs exhibit obviously enhanced photocatalytic performance. However, the decoration of excessive CQDs gives rise to a decrease in the photocatalytic activity. The enhanced photocatalytic activity of CQDs-modified Bi4Ti3O12 can be attributed to the following reasons: (1) The electron transfer between Bi4Ti3O12 and CQDs promotes an efficient separation of photogenerated electron/hole pairs in Bi4Ti3O12; (2) the up-conversion photoluminescence emitted from CQDs could induce the generation of additional electron/hole pairs in Bi4Ti3O12; and (3) the photoexcited electrons in CQDs could participate in the photocatalytic reactions.

scholarly journals Photocatalytic activity of exfoliated graphite–TiO2 nanoparticle composites

Nanoscale ◽  
2019 ◽  
Vol 11 (41) ◽  
pp. 19301-19314 ◽  
Author(s):  
Gloria Guidetti ◽  
Eva A. A. Pogna ◽  
Lucia Lombardi ◽  
Flavia Tomarchio ◽  
Iryna Polishchuk ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Liquid Phase ◽  
Atmospheric Pressure ◽  
Photocatalytic Performance ◽  
Low Cost ◽  
Exfoliated Graphite ◽  
Step Process ◽  
One Step ◽  
Liquid Phase Exfoliation ◽  
Nanoparticle Composites

We report the photocatalytic performance of composites prepared in a one-step process by liquid phase exfoliation of graphite and TiO2 at atmospheric pressure and in water, without heat or surfactants, starting from low-cost commercial reagents.

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