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[0001]-Oriented InN Nanoleaves and Nanowires: Synthesis,Growth Mechanism and Optical Properties

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Acta Metallurgica Sinica(English Letters) 2016年第9期29卷 820-826页

作者： Min Liu Hui-Qiang Liu Sheng Chu Ru-Fang Peng Shi-Jin Chu state key laboratory cultivation base for nonmetal composites and functional materials Southwest University of Science and Technology state key laboratory of Optoelectronic materials and Technology Sun Yat-Sen University

Novel indium nitride （INN） leaf-like nanosheets and nanowires have been grown on Si substrate by chemical vapor deposition method. The characterization results indicate that the samples are single-crystalline, and the growth direction of the nanowires and nanoleaves is [0001]. The growth mechanism of the InN nanoleaves is following the pattern of vapor-liquid-solid process with a three-step growth process. In addition, the room temperature photoluminescence spectra of two nanostructures show band-to-band emissions around 0.706 eV, where the emission from single nanoleaf is stronger than nanowire, showing potential for applications in optoelectronic devices.

关键词： Novel indium nitride (INN) Chemical vapor deposition (CVD) Nanoleaf Crystal structure Photoluminescence (PL)

Heterostructured ZnFe_2O_4/Fe_2TiO_5/TiO_2 composite Nanotube Arrays with an Improved Photocatalysis Degradation Efficiency Under Simulated Sunlight Irradiation

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Nano-Micro Letters 2018年第1期10卷 158-168页

作者： Kun Xiong Kunzhou Wang Lin Chen Xinqing Wang Qingbo Fan Jérémie Courtois Yuliang Liu Xianguo Tuo Minhao Yan state key laboratory cultivation base for nonmetal composites and functional materials Southwest University of Science and Technology Sichuan University of Science and Engineering

To improve the visible light absorption and photocatalytic activity of titanium dioxide nanotube arrays(TONTAs), ZnFe_2O_4(ZFO) nanocrystals were perfused into pristine TONTA pipelines using a novel bias voltageassisted perfusion method. ZFO nanocrystals were well anchored on the inner walls of the pristine TONTAs when the ZFO suspensions(0.025 mg m L^(-1)) were kept under a60 V bias voltage for 1 h. After annealing at 750 °C for2 h, the heterostructured ZFO/Fe_2 TiO_5(FTO)/TiO_2 composite nanotube arrays were successfully obtained. Furthermore, Fe^(3+)was reduced to Fe^(2+)when solid solution reactions occurred at the interface of ZFO and the pristine TONTAs. Introducing ZFO significantly enhanced thevisible light absorption of the ZFO/FTO/TONTAs relative to that of the annealed TONTAs. The coexistence of type I and staggered type II band alignment in the ZFO/FTO/TONTAs facilitated the separation of photogenerated electrons and holes, thereby improving the efficiency of the ZFO/FTO/TONTAs for photocatalytic degradation of methylene blue when irradiated with simulated sunlight.

关键词： Titanium dioxide nanotube arrays Zinc ferrites nanocrystals Pseudobrookite Photocatalysis Methylene blue Heterojunction

Comparison of Temperature Field Distribution between Cement Preclinkering Technology and Cement Precalcining Technology

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Journal of Wuhan University of Technology(materials Science) 2016年第2期31卷 355-360页

作者：徐迅 WANG Lan Country state key laboratory of Green Building materials China Building Materials Academy Beijing 100024 China Country state key laboratory cultivation base for nonmetal composite and functional materials Southwest University of Science and Technology Mianyang 62101O China

Through the comparison of calcination conditions between cement preclinkering technology and cement precalcining technology,we studied the characteristics of temperature field distribution of cement preclinkering technology systems including cyclone preheater,preclinkering furnace,and rotary *** used numericalsimulation method to obtain data of temperature field *** results are found by system *** ratio of tailcoalof cement preclinkering technology is about 70%,and raw mealtemperature can reach 1070 ℃.Shorter L/D kiln type of preclinkering technology can obtain more stable calcining zone *** highest solid temperature of cement preclinkering technology is higher than 80 ℃,and high temperature region（〉1450 ℃）length is 2 times,which is beneficialfor calcining clinker and higher clinker *** cement preclinkering technology can obtain more performance temperature filed,which improves both the solid-phase reaction and liquid-phase reaction.

关键词： cement preclinkering technology temperature field distribution kiln production heat balance solve the equation

Numerical simulation and experimental study of PbWO_4/EPDM and Bi_2WO_6/EPDM for the shielding of γ-rays

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Chinese Physics C 2016年第8期40卷 185-190页

作者：宋驰郑剑张全平李银涛李迎军周元林 state key laboratory cultivation base for nonmetal composites and functional materials Southwest University of Science and Technology School of materials Science and Engineering Southwest University of Science and Technology

The MCNP5 code was employed to simulate the γ-ray shielding capacity of tungstate composites. The experimental results were applied to verify the applicability of the Monte Carlo program. PbWO4 and Bi2WO6were prepared and added into ethylene propylene diene monomer （EPDM） to obtain the composites, which were tested in the y-ray shielding. Both the theoretical simulation and experiments were carefully chosen and well designed. The results of the two methods were found to be highly consistent. In addition, the conditions during the numerical simulation were optimized and double-layer γ-ray shielding systems were studied. It was found that the γ-ray shielding performance can be influenced not only by the material thickness ratio but also by the arrangement of the composites.

关键词： γ-ray shielding Monte Carlo program numerical simulation

Influence of EDTA on the Morphology of Barium Carbonate Using High Gravity Technology

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Chinese Journal of Structural Chemistry 2012年第10期31卷 1483-1489页

作者：刘树信王海滨霍冀川刘铭 Department of Chemistry and Chemical Engineering Mianyang Normal University state key laboratory cultivation base for nonmetal composites and functional materials Southwest University of Science and Technology

The superfine BaCO3 particles were synthesized by high gravity technology with BaCl·2H2O and Na2CO3 as the raw materials. The changes of particle size and morphology were studied by adding different amount of EDTA, and rod-like, near-spherical and cylindrical shape BaCO3 were prepared. The BaCO3 particles were analyzed and characterized by TG/SDAT, SEM, XRD and FT-IR. The results indicated that the crystal transformation temperature and decomposition temperature of BaCO3 had increased because of EDTA addition. With the increase of EDTA amount, the shape of BaCO3 changed from irregular rod-like to near-spherical then to cylindrical shape. All different shape BaCO3 adopts orthorhombic crystal systems.

关键词： high gravity technology BaC03 particle controlling morphology controlling

Preparation and Piezoelectric Properties of CuO-added(Ag_(0.75)Li_(0.1)Na_(0.1)K_(0.05_)NbO_3 Lead-free Ceramics

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Journal of Wuhan University of Technology(materials Science) 2015年第4期30卷 724-728页

作者：吴浪 NING Haixia state key laboratory cultivation base for nonmetal composites and functional materials Southwest University of Science and Technology Department of materials Engineering Mianyang Vocational and Technical College

CuO-doped（Ag0.75Li0.1Na0.1K0.05）NbO3（ALNKN-xCuO, x = 0.2mol%） lead-free piezoelectric ceramics were prepared by the solid-state reaction method in air atmosphere. The effects of CuO addition on the phase structure, microstructure, and piezoelectric properties of the ceramics were investigated. The experimental results show that the ALNKN ceramics without doping CuO possess rhombohedral phase along with K2NbrO16- type phase and metallic silver phase. For all of the CuO-doped ALNKN ceramics, a pure perovskite structure with the orthorhombic phase was obtained by enclosing the samples in a corundum tube. A homogeneous microstructure with＇the grain size of about 1 ~tm was formed for the ceramics with 0.5mo1% CuO. The grain size increases with increasing amount of CuO. The temperature dependence of dielectric properties indicates that the ferroelectric phase of the ALNKN-xCuO ceramics becomes less stable with the addition of CuO. The ceramics with x = lm01% exhibit relatively good electrical properties along with a high Curie temperature. These results will provide a helpful guidance to preparing other AN-based ceramics by solid-state reaction method in air atmosphere.

关键词： (Ag0.75Li0.1Na0.1K0.05)NbO3 lead-free ceramics piezoelectric properties CuO

Relaxor behavior and Raman spectra of CuO-doped Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)ferroelectric ceramics

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Journal of Advanced Ceramics 2014年第3期3卷 177-183页

作者： Huiqin LI Jingsong LIU Hongtao YU Shuren ZHANG state key laboratory cultivation base for nonmetal composite and functional materials Southwest University of Science and TechnologyMianyangSichuanChina state key laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengduSichuanChina

In this work,Raman spectra and dielectricity-temperature dependence measurements were used to investigate the B-site order degree in CuO-doped Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)ferroelectric *** measurement results indicated a typical relaxor characteristic for all *** the increasing of CuO doping content,the B-site order degree increased first and then ***,the frequency dispersion and the relaxation degree decreased first and then increased while the CuO addition content was increasing,which was thought to be strongly correlated with the variations of the B-site *** opposite variation tendency of the B-site order degree and the relaxation degree revealed that the phase transition dispersity is closely related to the order-disorder behaviors.

关键词： relaxor ferroelectrics dielectric properties Raman spectra

Spherical and Radiate Ni Particles Prepared by the Tartrate Precipitation and Thermal Decomposition Method

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Journal of Wuhan University of Technology(materials Science) 2013年第5期28卷 857-861页

作者：李涛刘颖 MA Guohua HE Dengliang College of materials Science and Engineering Sichuan University state key laboratory cultivation base for nonmetal composites and functional materials College of Chemistry and Chemical Engineening Mianyang Normal University

Nickel tartrate precursor particles were synthesized by the liquid phase precipitation method in an ethanol-water-ammonia mixed solution, with tartaric acid and using nickel chlorate as raw materials, with the pH value controlled at 4.0, and the temperature controlled at 50 ℃. Nickel particles with complicated morphology were prepared by the decomposition of nickel taratrate precursor particles at temperatures of 360, 380 and 400 ℃, respectively. The study of infrared spectroscopy （IR） indicated that the product was pure nickel tartrate. The studies of the atomic absorption spectrometry （AAS） and organic elemental analysis （OEA） indicated that the molar ratio of Ni2＋ to （C4H4O6）2- is close to 1：1. The studies of the differential scanning calorimeter and thermo-gravimetric analysis （DSC-TG） indicated that the chemical formula Niz（C4H4O6） 2.5H2O was confirmed. The studies of X-ray diffractions （XRD） indicated that the silvery white metal powders were pure Ni, with a face-centered cubic crystal structure. The images of scanning electron microscopy （SEM） showed that the morphology of metal Ni particles was obvious spherical and radiate. The diameter of nickel tartrate particles was about 60 μm, which consisted of many nanolathes; and the diameter of metal Ni particles was about 30 μm, which consisted of many lathes about 0.5 μm in thickness.

关键词： inorganic materials nickel spherical radiate precipitation thermal-decomposition optical spectroscopy thermal analysis scanning electron microscopy

Synthesis and properties of novel heat-resistant fluorescent conjugated polymers with bisindolylmaleimide

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Chinese Chemical Letters 2018年第3期29卷 513-516页

作者： Qianfeng Zhang Guanjun Chang Lin Zhang Research Center of Laser Fusion CAEP China Academy of Engineering Physics state key laboratory cultivation base for nonmetal composite and functional materials & School of Material Science and Engineering Southwest University of Science and Technology

Conjugated polymers with bisindolylmaleimide （BIM） backbone are obtained by the condensation polymerization of methyl and octanyl N-substituted BIMs with 4,4＇-difluoro-diphenylsulfone and 4,4＇-difluoro-diphenylketone. The structures of polymers are confirmed by F!rlR and NMR spectroscopy. The polymers exhibit both high glass transition temperatures （Tg 〉 175℃） and high decomposition temperatures （T5 〉 395 ℃）. Meanwhile, The uV-vis absorption and fluorescence spectra of the polymers are similar to the corresponding substituted BIMs. The quantum chemistry calculations indicate that the first excited states of polymers are mostly contributed by BIM structures.

关键词： Bisindolylmaleimide Heat-resistant polymer Photoluminescence DFT calculations