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Nano Research 2024年第8期17卷 7020-7026页

作者： Jinhua He Chenhui Wang Mingrui Liu Muhammad Ramzan Zhiwei Long Xian-gang Wu Yu Chen Haizheng Zhong MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Engineering Research Center for Mixed Reality and Advanced Display Technology School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

The potential use of large-size znse quantum dots as blue emitters for display applications has greatly inspired the colloidal ***,we report the negative effects of side reactions of large-size znse quantum *** side reactions between oleic acid and oleylamine generated amidation products and H_(2)O,which led to the hydrolysis of Zn(OA)2 to Zn(OH)2 and the subsequent formation of zinc oxide(ZnO)and zinc bis[diphenylphosphinate](Zn(DPPA)2)*** side reactions resulted in the formation of a defective surface including a Se-rich surface and oxygen-related *** negative effects can be overcome by adopting an etching strategy using potassium fluoride and myristic acid in *** overcoating a ZnS shell,blue emissive znse/ZnS quantum dots with a maximum photoluminescence quantum yield of up to 91%were *** further fabricated znse quantum dots-based blue light-emitting diodes with an emission peak at 456 *** device showed a turn-on voltage of 2.7 V with a maximum external quantum efficiency of 4.2%and a maximum luminance of 1223 cd·m^(−2).

关键词： quantum dots znse side reactions surface etching light-emitting diodes

znse及其Mn掺杂复合材料光吸收催化性能和高压结构性能研究

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光谱学与光谱分析 2024年第2期44卷 380-385页

作者：王世霞王晓雨胡天意上海理工大学材料与化学学院上海200093

znse半导体材料是制备光电器件和光催化反应催化剂的重要原材料。其单体材料具有强光下易变质、电子-空穴复合等现象。通过元素掺杂制备znse复合材料,并与单体材料对比研究了元素掺杂所提升的znse的光学及结构性能。首先采用水热法实验... 详细信息

znse半导体材料是制备光电器件和光催化反应催化剂的重要原材料。其单体材料具有强光下易变质、电子-空穴复合等现象。通过元素掺杂制备znse复合材料,并与单体材料对比研究了元素掺杂所提升的znse的光学及结构性能。首先采用水热法实验室制备纯znse和Mn∶Zn加入比分别为5%、10%、15%和20%的znse复合材料,对比材料形貌、结构,光吸收和催化性能,结果显示掺杂比为10%的样品结晶度最高,杂质成型量最少,催化性能最佳。采用Mao-Bell型金刚石压腔结合原位拉曼光谱探究纯znse和掺杂比为10%的样品的高压结构相变行为,以探究元素掺杂对样品结构性能的影响。研究结果:(1)扫描电子显微镜(SEM)图显示,加入Mn元素后制得的znse样品形貌为球状,与纯样大致相同,球状颗粒表面有小颗粒负载,且随着Mn加入量的增加,表面负载的物质增多;(2)X射线衍射(XRD)图谱表明,znse样品结构为立方闪锌矿结构,随着Mn加入量的增加,样品MnSe特征峰增强,杂质MnO_(2)成型越完全。掺杂比为10%的样品znse结晶度高,杂质成型量少;(3)固体紫外漫反射(UV-Vis)结果表明,掺杂比为10%的样品对光的吸收边最大,禁带宽度最小,为1.65 eV;(4)光催化实验结果显示,掺杂比为10%的样品催化降解甲基橙的效率最大,6 h降解85.4%。研究表明掺杂Mn元素比为10%的znse复合材料,光吸收和催化性能相对最好。金刚石压腔结合原位拉曼光谱探究znse样品和掺杂比为10%的样品的高压相变结果表明,(1)纯znse的LO声子模在压力上升到12.3 GPa时基本消失,TO声子模在压力上升到20.8 GPa时消失,整个加压过程中没有新峰生成,纯znse发生闪锌矿相向岩盐矿相转变的高压行为;(2)复合材料的TO声子模在6.9 GPa时发生劈裂,在8.0 GPa时208 cm^(-1)处有新峰出现,表明在此压力下部分样品由闪锌矿相转变为辰砂矿相。在10.8 GPa时辰砂矿相的峰消失,体系发生由辰砂矿相向岩盐矿相转变;加压至18.8 GPa,LO声子模非常微弱,几近消失,此时体系中的闪锌矿相完全转化为岩盐矿相。研究了不同条件下znse的光催化性能和相变行为,探究了不同掺杂比对znse光催化性能的影响,确定掺杂比为10%的znse样品为最佳掺杂比复合材料,丰富了极端条件下znse的物理化学性质的多样性研究。

关键词： znse Mn掺杂光吸收性能光催化性能高压相变

znse基蓝光量子点的中间壳层结构调控及其发光性能研究

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人工晶体学报 2024年第7期53卷 1160-1169页

作者：伍仕停余春燕方佳庆徐阳翟光美太原理工大学新材料界面科学与工程教育部重点实验室太原030024 太原理工大学材料科学与工程学院太原030024

znse作为一种不含重金属的宽带隙量子点(QDs),近年来在蓝光量子点及其发光二极管器件领域受到广泛关注。然而,znse基核壳结构蓝光量子点的核壳界面处通常存在较大的晶格失配,易于形成缺陷态捕获载流子,从而影响其光学性能。本文通过将... 详细信息

znse作为一种不含重金属的宽带隙量子点(QDs),近年来在蓝光量子点及其发光二极管器件领域受到广泛关注。然而,znse基核壳结构蓝光量子点的核壳界面处通常存在较大的晶格失配,易于形成缺陷态捕获载流子,从而影响其光学性能。本文通过将均质的单层znseS合金层替换为具有组分渐变结构的znseS合金层,合成了具有径向方向Se/S浓度渐变梯度的znseS合金中间壳层的znseTe/znse/znseS/ZnS量子点,并利用X射线衍射谱、稳态光致发光光谱、时间分辨发光光谱、透射电镜和电致发光测试等表征手段研究了不同合金中间壳层对量子点结构、形貌和光学性能的影响。结果表明,所合成的具有组分梯度znseS壳层的量子点的发射波长均为深蓝色(444.5 nm),发射线宽窄(znseS合金中间壳层沿量子点径向方向组分渐变平滑度的不断提高,量子点的荧光量子效率(PLQY)和色纯度等光学性质依次改善,其中通过S原子扩散形成的具有线性缓变znseS壳层的量子点具有最窄的发射线宽(15.8 nm)和最高的PLQY(20.7%)。利用这种具有最优荧光性能的量子点作为发光材料制备的发光二极管器件的最大外量子效率为1.8%,最高亮度为750 cd/m^(2)。本研究提出的量子点合成方案和结构优化策略有助于促进高质量无毒蓝光znse基核/壳量子点的发展。

关键词：无毒蓝光量子点核/壳结构梯度合金壳 znse 量子点发光二极管发光性能

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Efficient flower-like znse/Cu_(0.08)Zn_(0.92)S photocatalyst for hydrogen production application

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化学科学与工程前沿:英文版 2023年第9期17卷 1301-1310页

作者： Ying Wang Yue Han Ruiyang Zhao Jishu Han Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationInternational Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao266042China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao266042China

Photocatalytic hydrogen production utilizing abundant solar energy to produce high-calorie, clean, and pollution-free hydrogen is an important approach to solving environmental and resource problems. In this work, a high-efficiency flower-like znse/Cu_(0.08)Zn_(0.92)S photocatalyst was constructed through element doping and the formation of a Z-scheme heterojunction. The synergistic effect of Cu doping and the built-in electric field in the heterojunction enhanced light absorption and utilization by the znse/Cu_(0.08)Zn_(0.92)S microflowers, accelerated the separation and transfer of photogenerated electrons and effectively inhibited electron–hole recombination. Thus the photocatalytic hydrogen production ability of the znse/Cu_(0.08)Zn_(0.92)S microflowers was increased significantly. The highly stable znse/Cu_(0.08)Zn_(0.92)S microflowers could provide excellent catalysis of photocatalytic hydrogen production.

关键词： photocatalysis Cu_(0.08)Zn_(0.92)S znse hydrogen production

The precursor compound of two types of znse magic-sized clusters

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Nano Research 2022年第1期15卷 465-474页

作者： Xingxia Yang Meng Zhang Qiu Shen Yang Li Chaoran Luan Kui Yu Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065China Engineering Research Center in Biomaterials Sichuan UniversityChengdu 610065China Department of Ophthalmology West China School of MedicineWest China HospitalSichuan UniversityChengdu 610065China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China

Precursor compounds(PCs)link quantum dots(QDs)and magic-sized clusters(MSCs),which is pivotal in the conversion between QDs and ***,for the first time,we report the transformation,synthesis,and composition of a type of znse *** PCs can be directly transformed to two different MSCs with the assistance of octylamine and acetic acid at room *** two types of MSCs exhibit sharp absorption peaks at 299 and 328 nm which are denoted as MSC-299 and *** the preparation of znse PCs,diphenylphosphine(DPP)as an additive plays a key role which not only inhibits the thermal decomposition of Zn precursor,but also acts as a reducing agent to reduce the by-products produced in the *** composition was explored by X-ray photoelectron spectroscopy,energy dispersive spectrometer,matrix-assisted laser desorption/ionization time-of-flight mass spectra with znse PC powder appeared as white powder after purifying by toluene(Tol)and methanol(MeOH).The results indicate that the molar ratio of Zn/Se is 2:1 with a molecular of〜3,350 ***,we propose that the molecular formula of znse PCs is Zn_(32)Se_(16).In addition,at the molecular level,the covalent bond of Zn-Se is formed in znse *** study offers a deeper understanding of the transformation from PCs to MSCs and for the first time proposes the composition of ***,this research provides us with a new understanding of the role of DPP in the synthesis of colloidal semiconductor nanoparticles.

关键词： znse magic-size clusters(MSCs) precursor compounds(PCs) purification composition

Hydrogen-assisted activation of N_(2)molecules on atomic steps of znse nanorods

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Nano Research 2023年第5期16卷 6721-6727页

作者： Kun Du Xiuyao Lang Yuanyuan Yang Chuanqi Cheng Ning Lan Kangwen Qiu Jing Mao Weichao Wang Tao Ling Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education Institute of New-EnergySchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology College of Electronic Information and Optical Engineering Nankai UniversityTianjin 300071China College of Energy Engineering Huanghuai UniversityZhumadian 463000China

Electrochemical reduction reaction of nitrogen(NRR)offers a promising pathway to produce ammonia(NH_(3))from renewable ***,the development of such process has been hindered by the chemical inertness of N_(2).It is recently proposed that hydrogen species formed on the surface of electrocatalysts can greatly enhance ***,there is still a lack of atomiclevel connection between the hydrogenation behavior of electrocatalysts and their NRR ***,we report an atomistic understanding of the hydrogenation behavior of a highly twinned znse(T-znse)nanorod with a large density of surface atomic steps and the activation of N_(2)molecules adsorbed on its *** theoretical calculations and in situ infrared spectroscopic characterizations suggest that the atomic steps are essential for the hydrogenation of T-znse,which greatly reduces its work function and efficiently activates adsorbed N_(2)***,the liquid-like and free water over T-znse promotes its *** a result,T-znse nanorods exhibit significantly enhanced Faradaic efficiency and NH3 production rate compared with the pristine znse *** work paves a promising way for engineering electrocatalysts for green and sustainable NH3 production.

关键词： electrocatalytic nitrogen reduction reaction atomic steps work function znse

One-dimensional znse@N-doped carbon nanofibers with simple electrospinning route for superior Na/K-ion storage

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Chinese Chemical Letters 2023年第2期34卷 515-518页

作者： Di Huang Daxiong Wu Jixing Zhu Jinyu Xie Jipeng Wu Jiaojiao Liang Hunan University of Technology Zhuzhou 412008China School of Physics and Electronics Hunan UniversityChangsha 410082China

One-dimensional carbon nanofibers are widely applied as anode material in the energy storage field due to its unique structure and high conductivity. In this work, one-dimensional znse@N-doped carbon nanofibers(znse@NC NFs) are successfully synthesized by electrospinning and annealed without extra troublesome conditions. znse nanocrystals are enfolded in the N-doped carbon nanofibers, which can act as a protective layer to avoid the volume expansion of active material and promote ion transport during the cycling process. More importantly, the as-synthesized znse@NC NFs are served as the anode material and display the admirable storage properties for Na/K-ion batteries. The one-dimensional Zn Se@NC NFs material shows the high capacity of 237 mAh/g for Na-ion batteries at a current density of 1 A/g for 2000cycles. Meanwhile, it also delivers a high discharge capacity of 337 mAh/g for K-ion batteries at 0.2 A/g for 300 cycles. Additionally, it is confirmed that the pseudocapacitive contribution of the nano-structure material is up to 54.5% at a scan rate of 0.6 m V/s through the cyclic voltammetry(CV) measurement in K-ion batteries.

关键词： znse Nanofibers Electrospinning Na-ion batteries K-ion batteries Pseudocapacitive

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没食子酸辅助水热合成znse微球及其表征

中国有色金属学报 2022年第11期32卷 3375-3387页

作者：侯美蓉吕梦凡霍地东北大学材料各向异性与织构教育部重点实验室沈阳110819 东北大学材料科学与工程学院先进陶瓷材料研究中心沈阳110819

本文以绿色、环境友好的没食子酸(GA)为还原剂,一步水热合成制备出纳米颗粒自组装成的Zn Se微米球。同时研究了水热反应中GA添加量、反应温度及时间等参量对产物组成与形貌的影响以及Zn Se微球生长机制。利用XRD、SEM、TEM、XPS、UV-Vis... 详细信息

本文以绿色、环境友好的没食子酸(GA)为还原剂,一步水热合成制备出纳米颗粒自组装成的Zn Se微米球。同时研究了水热反应中GA添加量、反应温度及时间等参量对产物组成与形貌的影响以及Zn Se微球生长机制。利用XRD、SEM、TEM、XPS、UV-Vis DRS、FTIR等手段表征了样品物相组成、形貌、光谱特征。利用紫外光催化降解罗丹明B(RhB)溶液评价Zn Se微球的光催化性能。结果表明,在GA的还原作用下,Se被有效还原为Se^(2-),并与Zn^(2+)反应形成闪锌矿Zn Se。GA添加量和水热温度是控制产物组成与形貌的关键。znse一次颗粒尺寸随GA添加量的增加而逐渐减小;只有温度达到150℃及以上时,产物才为单相Zn Se。在15 mmol GA、200℃、24 h优化条件下制备的Zn Se微球具有优异的光催化性能,紫外光照2.5 h后,Zn Se微球对Rh B的光催化降解率达98.1%。

关键词：没食子酸 znse 微米球水热法光催化

Preparation and characterization of znse/CdSe core-shell microspheres

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Transactions of Nonferrous Metals Society of China 2015年第5期25卷 1559-1567页

作者：段雨露周丽旗徐国富张慧颖李旭刘小鹤中南大学材料科学与工程学院长沙410083 中南大学有色金属材料科学与工程教育部重点实验室长沙410083

The preparation of Zn Se/Cd Se core-shell structure nanocomposites by using the re-prepared Zn Se microspheres as the template under the hydrothermal condition was presented. The influence of different mole ratios of ZnS e to Cd（NO3）2 on the morphology and structure of the final product was investigated. And the performances of ZnS e/Cd Se core-shell structure nanocomposites were characterized by the means of X-ray diffraction（XRD） analyses, scanning electron microscopy（SEM）, transmission electron microscopy（TEM） and photoluminescence（PL） spectroscopy. The results indicate that the core-shell structure product can be prepared, when the mole ratio of Zn Se to Cd（NO3）2 is larger than 1：1; and the product will be ball solid structure, when the mole ratio of Zn Se to Cd（NO3）2 is equal to 1：1. The photo luminescence results show that Zn Se/Cd Se core-shell structures have high photo luminescence emission properties, and the product with mole ratio of Zn Se to Cd（NO3）2 being 1：0.5 has the best luminescence properties.

关键词： hydrothermal methed core-shell nanocomposite znse CdSe optical property

MoSe2/ZnO/znse hybrids for efficient Cr（Ⅵ） reduction under visible light irradiation

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Chinese Journal of Catalysis 2020年第1期41卷 180-187页

作者： Zhenxing Ren Xinjuan Liu Zhihao Zhuge Yinyan Gong Chang QSun Institute of Applied Chemistry Shanxi UniversityTaiyuan 030006ShanxiChina Institute of Optoelectronic Materials and Devices College of Optical and Electronic TechnologyChina Jiliang UniversityHangzhou 310018ZhejiangChina School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore

Photocatalysis activated by visible light remains highly ***,we report novel MoSe2/ZnO/znse(ZM)hybrids fabricated via a simple hydrothermal method for photocatalytic reduction of Cr(VI)under visible light *** hybrids show improved photocatalytic reduction ability under visible light irradiation compared to pure ZnO owing to good visible light absorption and rapid electron transfer and *** ZM hybrid shows the highest Cr(VI)reduction rate of 100%.Moreover,the photocatalytic Cr(VI)reduction process is mainly controlled by photoinduced electrons.

关键词： Transition metal dichalcogenides MoSe2 ZnO znse Cr(VI)