Unique 1D/3D K2Ti6O13/TiO2 micro-nano heteroarchitectures: controlled hydrothermal crystal growth and enhanced photocatalytic performance for water purification

2019 ◽  
Vol 9 (24) ◽  
pp. 7023-7033 ◽  
Author(s):  
Qiang Wang ◽  
Chenming Fan ◽  
Guomin Li ◽  
Jiangshui Luo ◽  
Bing Li
Keyword(s):  
Crystal Growth ◽  
Water Purification ◽  
Photocatalytic Performance ◽  
Pollutant Degradation ◽  
Hydrothermal Route ◽  
Hydrothermal Crystal Growth

Unique 1D/3D K2Ti6O13/TiO2 micro-nano heteroarchitectures with enhanced photocatalytic performance for pollutant degradation were successfully fabricated through a controlled hydrothermal route.

Simplistic Synthesis and Enhanced Photocatalytic Performance of Spherical ZnO Nanoparticles Prepared from Arabinose Solution

2019 ◽  
Vol 74 (10) ◽  
pp. 937-944 ◽  
Author(s):  
Babiker Y. Abdulkhair ◽  
Mutaz E. Salih ◽  
Nuha Y. Elamin ◽  
A. MA. Fatima ◽  
A. Modwi
Keyword(s):  
Zno Nanoparticles ◽  
Photocatalytic Performance ◽  
Hexagonal Wurtzite Structure ◽  
Zinc Nitrate ◽  
Wurtzite Structure ◽  
Sugar Solution ◽  
X Ray Diffraction ◽  
Pollutant Degradation ◽  
X Ray ◽  
Good Crystallinity

AbstractStrenuous efforts have been employed to prepare zinc oxide (ZnO) with eco-friendly methods; however, few studies have reported the fabrication of ZnO using a sustainable procedure. In this study, spherical ZnO nanoparticles were successfully fabricated for photocatalysis applications using a simple and eco-friendly method using an arabinose sugar solution. The ZnO nanoparticles with a wurtzite structure were obtained by combining zinc nitrate and arabinose in water, followed by heating, evaporation, and calcinations at different annealing temperatures. The annealed ZnO photocatalysts were characterised via X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The findings revealed a hexagonal wurtzite structure and good crystallinity with crystallite size increasing from 18 to 31 nm by means of an increase in the annealing temperature. The photocatalytic performance was examined to determine the degradation of mix dye waste. The spherical ZnO nanoparticles showed mix pollutant degradation of 84 % in 25 min at 400 °C.

Hydrothermal crystal growth of perovskite-type fluorides

1981 ◽  
Vol 16 (3) ◽  
pp. 813-816 ◽  
Author(s):  
Shigeyuki S¯omiya ◽  
Shin -Ichi Hirano ◽  
Masahiro Yoshimura ◽  
Kazumichi Yanagisawa
Keyword(s):  
Crystal Growth ◽  
Hydrothermal Crystal Growth ◽  
Perovskite Type

Hydrothermal Crystal Growth on Non-native Substrates: The Case of UO2

2021 ◽  
Author(s):  
Karl Rickert ◽  
Michael A. Velez ◽  
Timothy A. Prusnick ◽  
David B. Turner ◽  
Martin M. Kimani ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Hydrothermal Crystal Growth

scholarly journals Eu2+ and Eu3+ Doubly Doped ZnWO4 Nanoplates with Superior Photocatalytic Performance for Dye Degradation

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 765 ◽  
Author(s):  
Yuan Huang ◽  
Ming Li ◽  
Long Yang ◽  
Bao-gai Zhai
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Ammonium Bromide ◽  
Defect Engineering ◽  
Hydrothermal Route ◽  
Crystal Facet ◽  
X Ray ◽  
Cooperative Effects ◽  
Photoluminescence Lifetime

Eu2+ and Eu3+ doubly doped ZnWO4 nanoplates with highly exposed {100} facets were synthesized via a facile hydrothermal route in the presence of surfactant cetyltrimethyl ammonium bromide. These ZnWO4 nanoplates were characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectrometry, diffuse UV-vis reflectance spectroscopy, photoluminescence spectrophotometry, and photoluminescence lifetime spectroscopy to determine their morphological, structural, chemical, and optical characteristics. It is found that Eu-doped ZnWO4 nanoplates exhibit superior photo-oxidative capability to completely mineralize the methyl orange into CO2 and H2O, whereas undoped ZnWO4 nanoparticles can only cleave the organic molecules into fragments. The superior photocatalytic performance of Eu-doped ZnWO4 nanoplates can be attributed to the cooperative effects of crystal facet engineering and defect engineering. This is a valuable report on crystal facet engineering in combination with defect engineering for the development of highly efficient photocatalysts.

Simple hydrothermal synthesis and photocatalytic performance of coral-like BaTiO3 nanostructures

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7245-7252 ◽  
Author(s):  
Yonghong Ni ◽  
Hangsong Zheng ◽  
Nannan Xiang ◽  
Kefeng Yuan ◽  
Jianming Hong
Keyword(s):  
Hydrothermal Synthesis ◽  
Photocatalytic Performance ◽  
Hydrothermal Route ◽  
Photocatalytic Performances

Coral-like BaTiO3 nanostructures with good photocatalytic performances were successfully prepared through a simple hydrothermal route.

Enhancing visible light photocatalytic performance with N-doped TiO2 nanotube arrays assisted by H2O2

2019 ◽  
Vol 33 (01n03) ◽  
pp. 1940025 ◽  
Author(s):  
Chao Xiong ◽  
Shengsen Zhang ◽  
Yu Zhao ◽  
Min Zheng ◽  
Dongdong Hou ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Organic Pollutant ◽  
Electrochemical Anodization ◽  
Nanotube Arrays ◽  
Pollutant Degradation ◽  
Organic Pollutant Degradation ◽  
Acid Orange Ii ◽  
Photocatalytic Material ◽  
Visible Light Photocatalytic

N-doped TiO2 nanotube arrays were prepared by an electrochemical anodization method and subsequent ammonia annealing. Microstructures, morphology, optical properties and photocatalytic properties of the N-doped TiO2 nanotube arrays were measured and analyzed. In the degradation of Acid Orange II(AO-II), the photocatalytic degradation efficiency of the N-doped TiO2 nanotube arrays assisted by H2O2 are 12 times, 2 times and 5 times higher than TiO2 nanotube arrays, TiO2 nanotube arrays assisted by H2O2 and H2O2, respectively. Experimental results show that the N-doped TiO2 nanotube arrays is a promising photocatalytic material for organic pollutant degradation under visible light, especially under the assistance of H2O2.

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