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Synthesis of b-type Strontium Hydrogen Phosphate Nanosheets and Its Immobilization of Pb^(2+) in Acidic Aqueous Solution

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Acta Metallurgica Sinica(English Letters) 2015年第4期28卷 438-443页

作者： Fu-Qiang Zhuang rui-qin tan Wen-Feng Shen Xian-Peng Zhang Wei Xu Wei-Jie Song Faculty of Electrical Engineering and Computer Science Ningbo University Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences

Highly crystalline β-type strontium hydrogen phosphate （β-SrHPO4） nanosheets were prepared by a hydro- thermal method and used for the immobilization of lead ions （Pb2＋） from acidic aqueous solution. The effects of various parameters on the immobilization process, including solution pH value, contact time, initial ion concentrations, and coexistent competing cations, were studied to optimize the conditions for maximum immobilization. The β-SrHPO4 nanosheets exhibited a capacity of （1,120 ± 22） mg/g toward Pb2＋ in acidic solution （pH value is 3.0）, and the equilibrium was achieved within 8 rain. The competing cations such as Cu2＋, Zn2＋, Cd2＋, and Co2＋ affected slightly on the selective immobilization of Pb2＋. The results revealed that the removal mechanism of Pb2＋ by the β-SrHPO4 nanosheets was the dissolution/precipitation process in the acidic solution.

关键词： Strontium hydrogen phosphate Nanosheets Immobilization Lead ions Dissolution/precipitation

Growth and properties of hydrogenated microcrystalline silicon thin films prepared by magnetron sputtering with different substrate temperatures

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Rare Metals 2022年第3期41卷 1037-1042页

作者： Lin-qing Wang Wei-Yan Wang Jin-Hua Huang rui-qin tan Wei-Jie Song Jian-Min Chen State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Ningbo Institute of Material Technology and Engineering Chinese Academy of SciencesNingbo 315201China Faculty of Information Science and Engineering Ningbo UniversityNingbo 315211China

Hydrogenated microcrystalline silicon (μcSi:H) thin films were deposited by an radio frequency (RF)(13.56 MHz) magnetron sputtering at different substrate temperatures (100–300℃), and the influences of substrate temperature on the growth and properties ofμc-Si:H thin films were investigated. Surface roughness and crystallinity of the thin films increase as substrate temperature increases. And all thin films are at the transition region(X_(c)=49.2%~61.0%). Theμc-Si:H thin films deposited at lower substrate temperature (≤200℃) represent a weak(220) preferred orientation, while the thin films deposited at higher substrate temperature (≥250℃) exhibit a weak(111) preferred orientation. The μc-Si:H thin films have a dense structure, and the structural compactness of the thin films slightly increases with substrate temperature increasing. The Fourier transform infrared spectroscopy (FTIR) results indicate that theμc-Si:H thin films have a low hydrogen content (3.9 at%–5.6 at%), which is in favor of reducing light-induced degradation effect.

关键词： μc-Si:H thin films Magnetron sputtering Substrate temperature Hydrogen content

Diameter and Temperature Dependence of Thermal Conductivity of Single-Walled Carbon Nanotubes

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Chinese Physics Letters 2011年第6期28卷 210-213页

作者： PAN rui-qin Faculty of Science Shanghai Institute of TechnologyShanghai 201418

Temperature and diameter dependence of the thermal conductivity of several armchair single-walled carbon nanotubes(SWNTs)are studied by nonequilibrium molecular dynamics method with Brenner II *** thermal conductivities are calculated at temperatures from 100 K to 600 *** is found that the thermal conductivity decreases as the temperature increases and increases as the diameter of SWNT *** results demonstrate that these two phenomena are due to the onset of the Umklapp process.

关键词： process conductivity thermal

Characterizations on Mechanical Properties and In Vitro Bioactivity of Biomedical Ti–Nb–Zr–CPP Composites Fabricated by Spark Plasma Sintering

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Acta Metallurgica Sinica(English Letters) 2016年第11期29卷 1073-1080页

作者： Zheng-Yuan He Lei Zhang Wen-rui Shan Yu-qin Zhang Ye-Hua Jiang Rong Zhou Jun tan School of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093China National-local Joint Engineering Laboratory of Metal Advanced Solidification Forming and Equipment Technology Kunming 650093 China Engineering Technology Research Center of Titanium Products and Application of Yunnan Province Kunming 650093 China IFW Dresden Institute for Complex MaterialsP.O. Box 27 01 16 01171 Dresden Germany

To alleviate the bio-inert of Ti alloys as hard tissue implants, Ti–35Nb–7Zr–xCPP（calcium pyrophosphate,x = 5, 10, 15, 20 wt%） composites were prepared by mechanical alloying（MA） and following spark plasma sintering（SPS）. Mechanical behaviours and in vitro bioactivity of these composites were investigated systematically. Results showed that the composites consisted of β-Ti matrix, α-Ti, and metal–ceramic phases such as CaO, CaTiO3, CaZrO3, and TixPy. With increasing CPP content, the composites had higher strength（over 1500 MPa） and higher elastic modulus, but suffered almost zero plastic deformation together with lower relative density. When the CPP contents were 5 and 10 wt%,the compressive elastic moduli were 44 and 48 GPa, respectively, which were close to those of natural bones. However, the compressive elastic modulus of the composites increased significantly when CPP contents exceed 10 wt%, thus deteriorating the mechanical compatibility of the composites owing to more α-Ti and metal–ceramic phases. Besides, the surface of Ti–35Nb–7Zr–10CPP composite was deposited as a homogeneous apatite layer during soaking in simulated body fluid（SBF）. It indicates a good bioactivity between the implant materials and living bones.

关键词： Composites Spark plasma sintering Microstructure Mechanical behaviours Bioactivity

Si掺杂对Ga_(2)O_(3)/BP异质结光电性能调控的第一性原理研究

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原子与分子物理学报 2025年第4期42卷 131-137页

作者：李佳宏郝增瑞薛瑞鑫阚红梅关玉琴内蒙古工业大学理学院呼和浩特010010

近年来,氧化镓(Ga_(2)O_(3))是新一代超宽禁带(4.9 eV)半导体,基于优越的热稳定和化学稳定性、高击穿场强和可见光透过率等优点,在日盲紫外探测器和透明光电器件领域中引起了广泛的关注.但是,Ga_(2)O_(3)基光电器件存在迁移率较低而限... 详细信息

近年来,氧化镓(Ga_(2)O_(3))是新一代超宽禁带(4.9 eV)半导体,基于优越的热稳定和化学稳定性、高击穿场强和可见光透过率等优点,在日盲紫外探测器和透明光电器件领域中引起了广泛的关注.但是,Ga_(2)O_(3)基光电器件存在迁移率较低而限制其应用的现象,而构建合适的Ga_(2)O_(3)异质结是改善光电探测器的光电性能的有效手段之一.基于第一性原理构建β-Ga_(2)O_(3)/BP异质结模型,研究了氧空位(Vo)和Si掺杂对β-Ga_(2)O_(3)/BP异质结光电性质的调控以及相关机理.结果显示:β-Ga_(2)O_(3)/BP异质结结构有效降低β-Ga_(2)O_(3)功函数,提高灵敏度,Si掺杂降低结合能,增强稳定性;β-Ga_(2)O_(3)/BP异质结有效减小带隙,Si掺杂以及氧空位的存在,进一步减小带隙,增强光导电性,并且Si掺杂引起了光电导各向异性.此结果对改善Ga_(2)O_(3)基异质结光电性能提供理论参考.

关键词： β-Ga_(2)O_(3)/BP异质结缺陷光电性质第一性原理

An improved de-interleaving algorithm of radar pulses based on SOFM with self-adaptive network topology

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Journal of Systems Engineering and Electronics 2020年第4期31卷 712-721页

作者： JIANG Wen FU Xiongjun CHANG Jiayun qin rui School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China

As a core part of the electronic warfare(EW) system,de-interleaving is used to separate interleaved radar signals. As interleaved radar pulses become more complex and denser, intelligent classification of radar signals has become very important. The self-organizing feature map(SOFM) is an excellent artificial neural network, which has huge advantages in intelligent classification of complex data. However, the de-interleaving process based on SOFM is faced with the problems that the initialization of the map size relies on prior information and the network topology cannot be adaptively adjusted. In this paper, an SOFM with self-adaptive network topology(SANT-SOFM) algorithm is proposed to solve the above problems. The SANT-SOFM algorithm first proposes an adaptive proliferation algorithm to adjust the map size, so that the initialization of the map size is no longer dependent on prior information but is gradually adjusted with the input data. Then,structural optimization algorithms are proposed to gradually optimize the topology of the SOFM network in the iterative process,constructing an optimal SANT. Finally, the optimized SOFM network is used for de-interleaving radar signals. Simulation results show that SANT-SOFM could get excellent performance in complex EW environments and the probability of getting the optimal map size is over 95% in the absence of priori information.

关键词： de-interleaving self-organizing feature map(SOFM) self-adaptive network topology(SANT)

Pronounced temporal changes in soil microbial community and nitrogen transformation caused by benzalkonium chloride

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Journal of Environmental Sciences 2023年第4期126卷 827-835页

作者： rui Yang Shaohong Zhou Lilan Zhang Cunli qin State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment Ministry of EducationChongqing UniversityChongqing 400045China

As one typical cationic disinfectant, quaternary ammonium compounds(QACs) were approved for surface disinfection in the coronavirus disease 2019 pandemic and then unintentionally or intentionally released into the surrounding environment. Concerningly, it is still unclear how the soil microbial community succession happens and the nitrogen(N)cycling processes alter when exposed to QACs. In this study, one common QAC(benzalkonium chloride(BAC) was selected as the target contaminant, and its effects on the temporal changes in soil microbial community structure and nitrogen transformation processes were determined by q PCR and 16S r RNA sequencing-based methods. The results showed that the aerobic microbial degradation of BAC in the two different soils followed first-order kinetics with a half-life(4.92 vs. 17.33 days) highly dependent on the properties of the soil. BAC activated the abundance of N fixation gene(nif H) and nitrification genes(AOA and AOB) in the soil and inhibited that of denitrification gene(nar G). BAC exposure resulted in the decrease of the alpha diversity of soil microbial community and the enrichment of Crenarchaeota and Proteobacteria. This study demonstrates that BAC degradation is accompanied by changes in soil microbial community structure and N transformation capacity.

关键词： Benzalkonium chloride Soil Degradation kinetics Microbial community structure Nitrogen cycling

Night-time radiative warming using the atmosphere

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Light(Science & Applications) 2023年第12期12卷 2589-2596页

作者： Yining Zhu Yiwei Zhou Bing qin rui qin Min Qiu Qiang Li State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024China

Night-time warming is vital for human production and daily *** methods like active heaters are energy-intensive,while passive insulating films possess restrictions regarding space consumption and the lack of heat *** this work,a nanophotonic-based night-time warming strategy that passively inhibits thermal radiation of objects while actively harnessing that of atmosphere is *** using a photonic-engineered thin film that exhibits high reflectivity(~0.91)in the atmospheric transparent band(8-14μm)and high absorptivity(~0.7)in the atmospheric radiative band(5-8 and 14-16μm),temperature rise of 2.1℃/4.4℃compared to typical low-e film and broadband absorber is ***,net heat loss as low as 9Wm-2 is experimentally observed,compared to 16 and 39Wm-2 for low-e film and broadband absorber,*** strategy suggests an innovative way for sustainable warming,thus contributes to addressing the challenges of climate change and promoting global carbon neutrality.

关键词： passive radiative absorber

Littlewood Paley g-function on the Heisenberg Group

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Acta Mathematica Sinica,English Series 2006年第1期22卷 95-100页

作者： He Ping LIU rui qin MA LMAM School of Mathematical Sciences Peking University Beijing 100871 P. R. China

We consider the g-function related to a class of radial functions which gives a characterization of the L^p-norm of a function on the Heisenberg group.

关键词： Heisenberg group g-function