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Environmentally-friendly harvesting TiO2 nanospheres and V2O5 microrods from spent selective catalytic reduction catalysts

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Progress in Natural Science:Materials International 2021年第6期31卷 858-864页

作者： Hua-Jun Chen Rui Wang Yan-Ling Yang Xiao-Lei Shi Siyu Lu Zhi-Gang Chen School of Environment and Chemistry Luoyang Institute of Science and Technology School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials Shaanxi University of Science and Technology Centre for Future Materials University of Southern Queensland Springfield Central School of Mechanical and Mining Engineering The University of Queensland Green Catalysis Center and College of Chemistry Zhengzhou University

Spent selective catalytic reduction(SCR) catalysts are defined as hazardous wastes because of the toxicity of V2O5to the ecological environment. Recycling of V2O5and TiO2from the spent SCR catalysts has strikingly social and environmental benefits as well as economic values. In this work, a “NaOH + Na2CO3” system was employed to recycle 99.2% of anatase/rutile TiO2nanospheres with a nanospherical morphology from the spent SCR catalysts by a simple sintering-leaching process. The observed photocatalytic performance of anatase/rutile TiO2nanospheres was higher than that of the other TiO2recovered from the spent SCR catalysts,commercial TiO2, and chemosynthetic TiO2, which can be ascribed to the enhanced separation of photo-excited electron/hole in a direct Z-scheme of anatase/rutile TiO2homostructures. Additionally, high-purity V2O5microrods with high H2S removal performance were efficiently prepared by a hydrothermal method in the leaching solution, which is superior to the traditional method including NH4VO3precipitation and solvent extraction as the present method can recycle vanadate from low-grade filtrate with a 99.6% of recovery *** study develops an alternative method for controlling pollution of vanadate to soil and water and recycling of valuable metals.

关键词： TiO 2 nanospheres V 2 O 5 microrods Hydrothermal Spent selective catalytic reduction catalyst

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The synthesis of one-dimensional controllable ZnO microrods

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Chinese Physics B 2005年第3期14卷 586-591页

作者：张琳丽郭常新陈建刚胡俊涛 StructureResearchLaboratory UniversityofScienceandTechnologyofChinaHefei230026China//DepartmentofPhysicsUniversityofScienceandTechnologyofChinaHefei230026China DepartmentofPhysics UniversityofScienceandTechnologyofChinaHefei230026China

Various morphology ZnO Submicrorods and microrods have been fabricated onto glass substrates through chemical solution trowth by the source of zinc acetate (Zn(CH3COO)2·2H2O)and hexamethylene tetraamin((CH2)6N4).We discuss the influence of PH and the concentration of the solution on the shapes of the as-synthesized ZnO *** analyse the growth mechanism. The regular hexagonal ZnO rods align has been made by Control of a certain concentration and proper PH. The hexagonal ZnO columns mainal grew in the [002] direction. X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL)are used to characterize the structure, the morphogoty and optical property of the samples. The photoluminescence spectrum of hexagonal ZnO columns shows that there are a broad strong red band (650nm) and a broad bnad in short wavelength which are two overlapped emission bands with the peaks at about 380nm and 430nm. The UV emission(_387nm) comes from recombination of free excitons. The blue emission with peak at 430nm is assigned for the recombination from an electron at interstitial Zn to a hole in VB. The red emission at 650nm is ascribed to the recombination from an electron at vo2+ to a hole in VB.

关键词： Zno microrods photoluminescence crystallite growth chemical solution method

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Facile synthesis of one-dimensional hierarchical LiNi0.8Co0.15Al0.05O2 microrods: towards better rate and cycle performance for Li ion batteries

Facile synthesis of one-dimensional hierarchical LiNi0.8Co0....

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河南省化学会2016年学术年会

作者： Nai-Teng Wu Xian-Ming Liu Hong-Ru Fu Zhan Zhou Lu-fang Ma College of Chemistry and Chemical Engineering and Henan Key laboratory of Function-Oriented Porous Materials Luoyang Normal University

One-dimensional hierarchical LiNiCoAlO microrods are synthesized through lithiation of mixed Ni, Co and Al oxalate microrods obtained via a two-step co-precipitation route. CoCO·2HO microrods were prepared firstly, and used as a crystallite seed to allow the formation of MCO·2HO(M= Ni, Co and Al) microrods. The uniform hierarchical porous rod-like morphology endows the LiNiCoAlO microrods with superior high rate capability and cycling performance for highly reversible lithium storage. They deliver high specific discharge capacity of 212 and 109 m Ah/g at the rate of 0.1 and 10 C, respectively. At 1 C, they achieve a discharge capacity of 170 m Ah/g and without capacity fading after 100 cycles at room temperature. The excellent electrochemical performance can be attributed to the novel hierarchical microrods with larger contact area between electrolyte and electrode which ascribed to increase surface area, and simultaneously shorten diffusion path of the electron and Li ion.

关键词： hierarchical structure microrods i Ni0.8Co0.15Al0.05O2 cathode materials lithium ion batteries

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One-dimensional molecular co-crystal alloys capable of full-color emission for low-loss optical waveguide and optical logic gate

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Aggregate 2024年第1期5卷 299-308页

作者： Zhenhong Qi Yu-Juan Ma Dongpeng Yan Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryKey Laboratory of Radio-pharmaceuticals Ministry of EducationBeijing Normal UniversityBeijingChina

The luminescence color of molecule-based photoactive materials is the key to the applications in lighting and optical *** continuous regulation of emission color in molecular systems is highly desirable but still remains a challenge due to the individual emission band of purely organic ***,a novel alloy strategy based on molecular co-crystals is *** adjusting the molar ratio of pyrene(Py)and fluorathene(Flu),three types of molecular co-crystal alloys(MCAs)assemblies are prepared involving Py-Flu-OFN-x%,Py-Flu-TFP-x%,Py-Flu-TCNB-x%.Multiple energy level structure and Förster resonance energy transfer(FRET)process endow materials with tunable full-spectra emission color in visible ***,these MCAs and co-crystals can be successfully applied to low optical loss waveguide and optical logic gate by virtue of all-color luminescence from blue across green to red,together with smooth surface of onedimensional microrods,which show promising applications as continuous light emitters for advance photonics applications.

关键词： full-color emission microrods molecular co-crystal optical waveguide organic alloys

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