Sb2S3晶体的水热合成及表征

在水热条件下制备了Sb2S3晶体,用X射线粉末衍射（XRD）、扫描电镜（SEM）分别对Sb2S3晶体的物相及形貌进行了表征分析。实验结果表明,硫源、反应温度、反应时间会影响样品的形貌和粒径。     

Bi2S3纳米材料研究进展

Bi2S3是一种重要的半导体材料,在热电、电子和光电子器件以及红外光谱学上具有广阔的应用前景。从Bi2S3结构特点及应用性能等方面出发,主要介绍了Bi2S3纳米材料的制备方法如离子液法、热溶剂法、水热处理法等方法的最新研究进展,提出了Bi2S3纳米材料今后研究和应用的方向。     

GeS2-Sb2S3玻璃的三阶非线性研究

采用熔融-急冷法制备了(100-x)GeS2-xSb2S3(x=10%、15%和20%)系列硫系玻璃,测试了样品的折射率、从可见到近红外的透过特性.采用Z-扫描方法测试了样品的三阶非线性特性,分析了Sb2S3的含量对玻璃的线性折射率,透过率和三阶非线性性能的影响.结果表明样品的线性折射率、非线性折射率n2、非线性吸收系数β以及三阶非线性光学极化率χ(3)随着Sb2S3的含量增加而增大,Sb2S3物质的量含量为20%的样品在800 nm处的三阶非线性折射率n2和非线性吸收系数β分别为:n2=3.27×10-10 esu和β= 31.5 cm/Gw.     

不同形貌Bi2S3纳米结构的研究进展

近来,半导体Bi2S3纳米材料由于在电视摄像、热电设备、电子和光电子器件以及红外光谱学上的广泛应用而引起了人们的极大关注.到目前为止,许多方法已被用来合成不同形貌的Bi2S3纳米结构.本文综述了Bi2S3纳米材料合成的最新研究进展,并对其发展趋势和前景进行了展望.     

新型聚酯缩聚催化剂S-PT评估

在小试装置上 ,通过DMT法、PTA法对聚酯生产所采用的Sb2 O3、Sb(Ac) 3、S 2 4及S PT催化剂进行对比 ,对所得切片进行分析、纺丝并与切片的国家标准进行比较 ,得出的结论是S PT催化剂性能优于其它催化剂     

Sb2S3薄膜制备技术研究进展

本文首先对Sb2S3薄膜的性质和应用进行了简单介绍,然后从真空热蒸发法、化学浴沉积法、仿生自组装单层膜法和雾化热解喷涂法等现有制备技术及研究进展进行了全面的综述,文章最后对Sb2S3薄膜的制备方法改进及器件研究领域进行了展望.     

Dy3+掺杂Ga-Sb-La-S新型硫系玻璃和光纤制备及中红外发光特性

制备了一系列新型Ga2 S3-Sb2S3-La2S3硫系玻璃,研究了玻璃的热学和光学性能;向优化的玻璃中掺杂Dy3+,研究了玻璃的中红外发光性能;基于优化的玻璃组成,拉制了纤芯/包层结构光纤,评估了其作为中红外激光增益介质的潜力.实验结果表明,Ga2S3-Sb2S3-La2S3玻璃具有宽的红外透过范围(约0.7 ～13.6 μm)和高的线性折射率(约2.655 ～2.707),组成为20Ga2 S3-75Sb2 S3-5La2S3的玻璃具有最佳的抗析晶热稳定性.Dy3+掺杂的玻璃在2.95 μm和4.40 μm具有较高的发光量子效率和较大的受激发射截面.拉制的20Ga2 S3-75Sb2S3-5La2 S3∶0.05wt％Dy3 +/20Ga2 S3-74Sb2 S3-6La2 S3光纤透光范围为2～8 μm,其背景损耗＜8 dB/m.在1.32 μm波长激发时,光纤显示出强的中红外发光.这些优异性能表明该玻璃光纤有望成为一种高效的中红外激光增益材料.     

锑的污染及其毒性效应和生物有效性

1锑的简介锑的英文名称为Antimony,其元素符号Sb则来自拉丁文名称Stibium。锑是一种重要的有色金属,有灰锑、黄锑、黑锑3种同素异形体。锑在地壳中质量比含量约为5×10-5%,排在93种天然元素的第64位。锑在自然界中主要有以下几种分布形式:(1)自然锑、锑砷和锑银合金;(2)硫化物和氧化物(如灰锑矿Sb2S3、硫氧锑矿Sb2S2O);(3)含硫盐,主要是由络阴离子[SbS3]3-与Ag、Cu、Pb、Fe形成含硫盐矿物(如车轮矿CuPbSbS3等);(4)氧化物(如锑华Sb2O3、方锑矿等);(5)锑酸盐(如羟锑铅盐等)。而最主要的锑矿物是灰锑矿(Sb2S3)。我国是世界上锑储量最…     

碳载Sb-Pb-Pt电催化纳米材料的制备与结构表征

:通过电化学方法在玻碳表面沉积催化物质研制Sb Pb Pt合金纳米材料。运用循环伏安(CV)、石英晶体微天平 (EQCM)、扫描隧道显微镜 (STM)和X 光电子能谱 (XPS)等技术对其进行表征。结果指出 ,碳载Sb Pb Pt电催化纳米材料的稳定性明显高于电有机合成中常用的Pb和Sb等电极。在酸性介质中碳载Sb Pb Pt电催化纳米材料电极上氢的析出电位负移至 - 0 45V ,有较高的电还原应用价值。通过EQCM技术对纳米薄膜合金电极的形成过程进行原位跟踪和STM观察 ,表明所研制的Sb Pb Pt纳米材料是由粒度均匀的纳米颗粒组成的合金薄膜。     

基于Raman光谱的GeS_2-Sb_2S_3-CdS硫系玻璃结构研究

利用Raman光谱对GeS_2-Sb_2S_3-CdS体系硫系玻璃的结构进行研究。结果发现:其基本单元为具有准三维结构的[GeS_4]四面体和准二维结构的[SbS_3]三角锥;随着Sb_2S_3含量的增加,玻璃逐渐从准三维网络结构过渡到以[GeS_4]_m和[SbS_3]_n结构单元、Ge—S—Sb桥硫连接和Sb—Sb、Ge—Sb、Ge-Ge金属键连接的层状或链状结构;CdS提供非桥硫并降低网络聚合程度;由于Sb_2S_3和CdS的作用,玻璃中产生大量金属键和悬挂键,增加了玻璃中的结构缺陷。     

A facile chemical conversion synthesis of Sb2S3 nanotubes and the visible light-driven photocatalytic activities

ABSTRACT: We report a simple chemical conversion and cation exchange technique to realize the synthesis of Sb2S3 nanotubes at a low temperature of 90°C. The successful chemical conversion from ZnS nanotubes to Sb2S3 ones benefits from the large difference in solubility between ZnS and Sb2S3. The as-grown Sb2S3 nanotubes have been transformed from a weak crystallization to a polycrystalline structure via successive annealing. In addition to the detailed structural, morphological, and optical investigation of the yielded Sb2S3 nanotubes before and after annealing, we have shown high photocatalytic activities of Sb2S3 nanotubes for methyl orange degradation under visible light irradiation. This approach offers an effective control of the composition and structure of Sb2S3 nanomaterials, facilitates the production at a relatively low reaction temperature without the need of organics, templates, or crystal seeds, and can be extended to the synthesis of hollow structures with various compositions and shapes for unique properties.     

Fabrication of Sb2S3 thin films by sputtering and post-annealing for solar cells

The semiconductor antimony sulfide (Sb₂S₃) is a potential absorber materials for the top sub-cell of Si-based tandem solar cells because of its appropriate band-gap, simple binary composition, nontoxic elements, and long-term stability. In this study, polycrystalline Sb₂S₃ films were fabricated by post-annealing of radio frequency (RF) magnetron sputtered precursors using an Sb2S3 target. The effects of the post-annealing temperature and atmosphere on Sb₂S₃ film properties and device performances were investigated. A high-performance device having a 2.41% power conversion efficiency was obtained by making use of a uniform Sb2S3 absorber layer. This preliminary experimental study shows that Sb2S3 thin films could be used as top sub-cell absorber materials for third-generation high efficiency, stable, and environmentally friendly Sb₂S₃/Si tandem solar cells.     

不同结构、形貌In_2S_3纳米材料的离子热合成及表征

以氯化铟和硫化钠为原料,以不同的离子液体为溶剂,采用离子热法合成了不同结构、形貌的硫化铟纳米材料。用XRD、SEM、TEM对产物结构和形貌进行了表征。结果表明:经150℃恒温24 h,在离子液体1-乙基-3-甲基咪唑溴盐中得到四方相结构六边形片状的硫化铟,而在1-丁基-3-甲基咪唑四氟硼酸盐中得到的是立方相结构花球状形貌的硫化铟。FTIR结果表明,离子液体在反应过程中起到重要作用。对片状硫化铟的紫外可见光谱及光致发光性能也进行了表征。     

ABS塑料阻燃改性研究

报道了PVC,PVC／Sb2O3,DBDPO/Sb2O3对ABS塑料的燃烧性能、力学性能和加工性能的影响规律。研究表明：DBDPO／Sb2O3复合阻燃剂对ABS阻燃效果最佳,PVC／Sb2O3次数次之,PVC只有在添加量较大时才显示良好的阻燃效果。     

Monatomic Sb thin films alloyed with Sb2S3 enables superior thermal stability and resistance drift by spontaneous self-decomposition

Monatomic Sb thin films can eliminate the risks of compositional partitioning, but it normally crystallizes instantly and fails to maintain amorphous state at room temperature. Here, we prepared Sb_x (Sb₂S₃)_100-x thin films. The materials consist of pure Sb with low resistance drift and chalcogenide Sb₂S₃ with high thermal stability. It is found that the Sb_64·8(Sb₂S₃)_35.2 thin film possesses the advantages of these two compounds. The thin film showed good phase-change ability with an ultralow resistance drift coefficient of 0.006, much lower than conventional Ge₂Sb₂Te₅ (0.076). Moreover, it also exhibited a better amorphous thermal stability. These improvements are closely related to the hybrid nanostructure of Sb crystals and Sb–S phase by spontaneous self-decomposition in the Sb-rich Sb–S material. Our work thus demonstrates that the binary Sb-rich Sb–S thin film can become a promising alternative to replace the conventional Ge₂Sb₂Te₅ thin film with potential for neuromorphic synaptic devices.     

N-甲基-N-哌嗪基二硫代氨基甲酸锑的合成与表征

用CS2、N-甲基哌嗪和Sb2O3为原料,在三氯甲烷中合成了N-甲基-N-哌嗪基二硫代氨基甲酸锑(Ⅲ)配合物[Sb(S2CNC4H8NCH3)3]H2O,用化学分析、元素分析、红外光谱、X射线粉末衍射、热分析等手段对配合物的组成和结构进行了表征,探索了反应时间、反应温度、不同溶剂对产率的影响。结果表明,以三氯甲烷为溶剂,25℃反应1 h,用CHCl3-CH3OH混合溶剂重结晶后产率最高,可达74%。     

Phase Separation in Nonstoichiometry Ge–Sb–S Chalcogenide Glasses

A series of (1 ? x)GeS_2.5 – xSb chalcogenide glasses were prepared using the conventional melt‐quenching method. Their microstructure and thermal response were systematically studied. We observe a compositional threshold of x = 0.25 which corresponds to chemical stoichiometric composition in the calorimetric experiments. It is in good accordance with the Raman scattering results and laser‐induced phase transformation behavior. They also indicate that phase separation of Sb‐rich phase exists in the S‐poor samples. Moreover, we got a structural modeling of this phase separation: (1) at x = 0.25, which is chemical stoichiometric composition, the structural motifs are only SbS₃ pyramid and GeS₄ tetrahedra, and the three‐coordinated SbS₃ pyramid is isolated by GeS₄ tetrahedra; (2) at x < 0.25, the S–S bonds exist in the glass network due to the excess of S; and (3) at x > 0.25, the excess of Sb break the Ge–S and Sb–S bonds to form Sb(Ge)–Sb Bonds, and the Sb atoms segregate from the backbone to nucleate a separate Sb‐rich phase. This work provides a new way to investigate the phase separation of glass networks and helps us to better understand their related physical properties.     

硫化锑改性二氧化钛电极板的制备及其光电催化作用

采用化学沉积法,以三氯化锑为原料,与Na2S2O3水溶液混和,浸渍二氧化钛氧化铟锡镀膜玻璃电极（ITO/TiO2电极板）制成改良型电极。利用紫外吸收光谱（UV-vis）,紫外可见漫反射光谱（DRS）,X射线衍射（XRD）,扫描电子显微镜（SEM）等方法对样品进行表征。结果表明,Sb2S3沉积效果明显;在波长400 nm至624 nm的可见光范围内,该薄膜有强烈的吸收;循环伏安法的测定确定该电极板具有可见光的响应能力,并且光电转化率为3.4%。