Facile Solvothermal Method to Synthesis Eu Doped TiO2 Hollow Microspheres with Enhanced Photoluminescence

2013 ◽  
Vol 634-638 ◽  
pp. 2198-2202
Author(s):  
Jian Dong Zhuang ◽  
Hu Zhou ◽  
Qian Liu
Keyword(s):  
Solvothermal Method ◽  
Hollow Spheres ◽  
Hollow Structure ◽  
Europium Nitrate ◽  
Solvothermal Process ◽  
Uniform Size ◽  
Enhanced Photoluminescence ◽  
Facile Solvothermal Method ◽  
Calcination Treatment

Eu doped TiO2 powders have been prepared by the solvothermal process followed by calcination treatment. The furfural and dodecylamine assisted solvothermal method is a very simple way of fabricating porous TiO2 hollow spheres due to in situ hydrolysis and a self-assembled effect. By adding europium nitrate into the precursoSubscript textr solution, Eu-doped TiO2 hollow spheres with an intense photoluminescence were easily obtained. The stronger photoluminescence of Eu-doped TiO2 hollow sample can be attributed to the unique microstructures, such as uniform size distribution and the broken hollow structure, compared to solid Eu-TiO2 sample.

scholarly journals Constructing Carbon-Coated Fe3O4 Hierarchical Microstructures with a Porous Structure and their Excellent Cr(VI) Ion Removal Properties

2021 ◽  
Author(s):  
xiaoping wu ◽  
Lin Cheng ◽  
Chang-Sheng Song ◽  
Yi-Zhe Zhang ◽  
Xiao-Jing Shi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Magnetic Nanoparticles ◽  
Solvothermal Method ◽  
Hollow Spheres ◽  
High Capacity ◽  
Hollow Structure ◽  
Magnetic Composite ◽  
Ion Removal ◽  
Carbon Coated ◽  
Facile Solvothermal Method

Abstract Here, a facile solvothermal method coupled with an annealing strategy is developed to synthesize Fe3O4/carbon (Fe3O4@C) magnetic composite microstructures with different morphologies, including flower-like, hollow spheres and egg-like. Owing to the unique multi-porous and hollow structure, the as-prepared hierarchical Fe3O4@C hollow microspheres composite exhibit appealing performance as an absorbent of Cr(VI) ions in aqueous solution, delivering a high capacity of ca.197.2mg/g. Furthermore, the magnetic Fe3O4 ‘‘core’’ in composite hierarchical microstructures makes them easy to separate from aqueous systems by magnetic separation, the layer of carbon effectively prevents agglomerations of magnetic nanoparticles and expands their range of applications. The excellent Cr(VI) ions adsorbent activities of the Fe3O4@C magnetic composite microstructures would have a potential adsorbing material application in environmental purification.

Preparation of hollow Fe3O4 spheres through a facile method and their applications

2017 ◽  
Vol 10 (06) ◽  
pp. 1750075 ◽  
Author(s):  
Xingping Wu ◽  
Aiping Zhu ◽  
Zhaodong Nan
Keyword(s):  
Saturation Magnetization ◽  
Ostwald Ripening ◽  
Solvothermal Method ◽  
Hollow Spheres ◽  
Hollow Structure ◽  
Solid Sphere ◽  
Small Particles ◽  
Potential Applications ◽  
One Step ◽  
Solid Spheres

Fe3O4 hollow microspheres with good dispersibility and high saturation magnetization were synthesized through a facile one-step solvothermal method. The formation mechanism of the hollow structure was studied by taking time-dependent experiments. Porous [Formula: see text]-FeOOH and [Formula: see text]-Fe2O3 nanosheets were firstly fabricated. Fe3O4 solid spheres aggregated by small particles were obtained from the transition of [Formula: see text]-FeOOH and [Formula: see text]-Fe2O3. Finally, the solid sphere is transferred to hollow sphere through Ostwald ripening. The maximum saturation magnetization of the hollow spheres is [Formula: see text][Formula: see text]emu/g, which is higher than some results reported in references. The Fe3O4 hollow spheres show potential applications in microwave absorption and photocatalysis.

Solvothermal Synthesis and Luminescence Properties of Gd2O2S:RE3+ (RE3+=Eu3+/Tb3+) Hollow Sphere

2019 ◽  
Vol 807 ◽  
pp. 1-10 ◽  
Author(s):  
Guang Xi Xu ◽  
Xiao Tong Sang ◽  
Jing Bao Lian ◽  
Nian Chu Wu ◽  
Xue Zhang
Keyword(s):  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Raw Materials ◽  
Hollow Spheres ◽  
Hollow Structure ◽  
Molar Ratio ◽  
Detailed Characterization ◽  
X Ray ◽  
Electronic Microscope

Eu3+ and Tb3+ ions singly activated Gd2O2S hollow spheres have been successfully synthesized via solvothermal method by using Gd (NO3)3, Eu (NO3)3, Tb (NO3)3 and thiourea as raw materials. Detailed characterization of the as-prepared samples were obtained by X-ray diffractometry (XRD), field emission scanning electron microscopy (FE-SEM), transmission electronic microscope (TEM) and photoluminescence (PL) spectroscopy. The results demonstrate that at 220 oC for 24 h, the molar ratio of thiourea/Gd3+ has no significant impact on the phase composition of Gd2O2S products. With the reaction time increased from 6 h to 24 h, the morphology of Gd2O2S samples changed from ellipsoidal to near-spheroidal structure, but still remained hollow structure. PL results show that the strongest emission peaks for Gd2O2S:Eu3+ and Gd2O2S:Tb3+ samples were centered at 625 nm and 545 nm, corresponding to the 5D0→7F2 transition of Eu3+ ions and 5D4→7F5 transition of Tb3+ ions, respectively. The quenching concentrations for Eu3+ and Tb3+ ions were 12% and 6%, which can be attributed to the exchange interaction for Eu3+ and Tb3+ ions, respectively.

Solvothermal Synthesis of TiO2 Hollow Microsphere and Its Photocatalytic Properties

2011 ◽  
Vol 356-360 ◽  
pp. 345-348
Author(s):  
Jin Guo Wang ◽  
Jian Zhu ◽  
Xi Li ◽  
He Xing Li
Keyword(s):  
Photocatalytic Activity ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Uv Light ◽  
Hollow Structure ◽  
Hollow Microsphere ◽  
Hollow Microspheres ◽  
Photocatalytic Properties ◽  
Multiple Reflections ◽  
Facile Solvothermal Method

TiO2hollow microspheres were synthesized by a facile solvothermal method. The prepared samples were characterized by the XRD, SEM, TEM, BET and UV-vis. The results showed that the TiO2hollow microspheres offered an enhanced photocatalytic activity due to the multiple reflections of the UV light within the inner hollow structure.

In situ fabrication of highly crystalline CdS decorated Bi2S3 nanowires (nano-heterostructure) for visible light photocatalyst application

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23508-23517 ◽  
Author(s):  
Rajendra P. Panmand ◽  
Yogesh A. Sethi ◽  
Rajashree S. Deokar ◽  
Datta J. Late ◽  
Haribhau M. Gholap ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Solvothermal Method ◽  
Cds Nanoparticles ◽  
Solar Hydrogen ◽  
Visible Light Photocatalyst ◽  
In Situ Fabrication ◽  
Solar Hydrogen Production ◽  
Facile Solvothermal Method

Herein, we have demonstrated the in situ synthesis of the orthorhombic Bi2S3 nanowires decorated with hexagonal CdS nanoparticles by facile solvothermal method. The heterostructures have been used as photocatalyst for solar hydrogen production.

Solvothermal synthesis of flower-like CoS hollow microspheres with excellent microwave absorption properties

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 100392-100400 ◽  
Author(s):  
Tingyuan Huang ◽  
Man He ◽  
Yuming Zhou ◽  
Shiwei Li ◽  
Binbin Ding ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Hollow Spheres ◽  
Hollow Microspheres ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Microwave Absorbers ◽  
Facile Solvothermal Method

In this study, flower-like CoS hollow spheres (CHSs), synthesized via a facile solvothermal method in the presence of CTAB, were initially investigated as microwave absorbers.

In situ preparation of CdS decorated ZnWO4 nanorods as a photocatalyst for direct conversion of sunlight into fuel and RhB degradation

2019 ◽  
Vol 3 (3) ◽  
pp. 793-800 ◽  
Author(s):  
Yogesh A. Sethi ◽  
Rajendra P. Panmand ◽  
Anuradha Ambalkar ◽  
Aniruddha K. Kulkarni ◽  
Deepak R. Patil ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Solvothermal Method ◽  
Direct Conversion ◽  
Solar Light ◽  
Cds Nanoparticles ◽  
In Situ Preparation ◽  
Facile Solvothermal Method

In situ synthesis of monoclinic ZnWO4 nanorods decorated with hexagonal CdS nanoparticles by a facile solvothermal method used as photocatalysts for hydrogen production under solar light.

Triple-shelled NiMn2O4 hollow spheres as an efficient catalyst for low-temperature selective catalytic reduction of NOx with NH3

2018 ◽  
Vol 54 (70) ◽  
pp. 9797-9800 ◽  
Author(s):  
Yanling Han ◽  
Jincheng Mu ◽  
Xinyong Li ◽  
Jinsuo Gao ◽  
Shiying Fan ◽  
...  
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Solvothermal Method ◽  
Catalytic Reduction ◽  
Hollow Spheres ◽  
Efficient Catalyst ◽  
Reduction Of Nox ◽  
Facile Solvothermal Method

Unique triple-shelled NiMn2O4 hollow spheres are fabricated by a facile solvothermal method.

scholarly journals Facile Synthesis of Hollow Flower-Like SnO and Applications in Lithium Ion Batteries

2021 ◽  
Author(s):  
Yuxi Guo ◽  
Panpan Xu ◽  
Manzhang Xu ◽  
Ken Deng ◽  
Zhiyong Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Transition Metal Oxides ◽  
Solvothermal Method ◽  
Specific Capacity ◽  
Hollow Structure ◽  
Lithium Ion ◽  
Capacity Retention ◽  
Method Approach ◽  
Flower Structures ◽  
Facile Solvothermal Method

Abstract Novel hollow flower-like SnO structures have been successfully synthesized by using a facile solvothermal method approach, which injecting LiN(SiMe3)2 to the solution of SnCl2 and oleamine. The as-synthesized hollow flower-like SnO structures were aggregated by ultrathin SnO nanosheets with large surface area and exhibit narrow size distribution of ~2.0 µm. The electrochemical performance of hollow flower-like SnO structures were examined as an anode material in coin cells for lithium-ion batteries. It demonstrates excellent lithium ion batteries performance as characterized by the cycling stability, specific capacity, cyclic voltammetry and rate performance. The measured discharge capacity is 361.4 mAh g-1 after 50 charge/discharge cycles with 46% capacity retention, which indicated a improving in cyclic stability. This result demonstrated that the specific hollow structure has great potential as the electrodes for lithium ion batteries. This work may provide an attractive road to synthesize other hollow-flower structures of transition metal oxides.

scholarly journals Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis

2021 ◽  
Vol 10 (1) ◽  
pp. 403-411
Author(s):  
Youliang Cheng ◽  
Mingjie Wang ◽  
Changqing Fang ◽  
Ying Wei ◽  
Jing Chen ◽  
...  
Keyword(s):  
Uv Light ◽  
Carbon Quantum Dots ◽  
Diffusion Method ◽  
Ag Nps ◽  
Uniform Size ◽  
High Antibacterial Activity ◽  
Fluorescent Materials ◽  
Potential Applications ◽  
Mesoporous Sio2

Abstract To change the optical properties and improve the antibacterial performances of carbon quantum dots (CQDs) and Ag NPs, mesoporous SiO2 spheres were combined with them to form the composites. In this paper, CQDs with a uniform size of about 3.74 nm were synthesized using glucose as carbon source. Then, CQDs/mesoporous SiO2/Ag NPs composites were obtained in situ under UV light irradiating by using mesoporous SiO2 and Ag NO3 as the carrier and silver resource, respectively. The diameter of CQDs/mesoporous SiO2/Ag NPs particles was in the range of 200–250 nm. With the increase in irradiating time, the red-shift in the UV-Vis spectrum for as-prepared CQDs/mesoporous SiO2/Ag NPs composites was found, and the adsorption peak was widened. In addition, the composites showed a high antibacterial activity against Staphylococcus aureus and Escherichia coli via disc diffusion method. These results indicated that inhibition circles for Ag NPs/mesoporous SiO2/CQDs and mesoporous SiO2/Ag NPs were similar in diameter. Furthermore, the two composites had a better bactericidal performance compared with other particles. Therefore, as-prepared CQDs/mesoporous SiO2/Ag NPs composites in this paper have great potential applications for fluorescent materials and antibacterial materials.

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