英语翻译The preparation of ultrafine powder of bismuth sulfideTh

英语翻译
The preparation of ultrafine powder of bismuth sulfide
The synthesis of binary metal sulfides has been the focus of attention because of their important physical and chemical properties [1,2],good commercial applications in semiconductors,pigments,luminescence devices,solar cells,IR detectors and optical fiber,communications,modern thermoelectric coolers [3].Bismuth sulfide (Bi2S3) is a direct band gap material with Eg of 1.3  eV [4] and useful for photodiode arrays of photovoltaics [5].Usually,busmuth sulfide can be prepared by direct reaction of bismuth and sulfur vapor in a quartz vessel at high temperature [6].The chemical deposition method was applied to prepare bismuth sulfide through reaction of bismuth salt complexed by triethanolamine or EDTA with an aqueous solution containing a sulfur sourse such as thioacetamide,thiourea,sodium thiosulphate,geseous H2S.However,the powders obtained through this route are mostly amorphous or poorly crystallized [7–10].The thermal decomposition preparation of bismuth sulfide was also reported by thermal decomposition of bismuth dithiocarbamate complexes [11],metal ethylxanthate [12],Bi-thiourea complex [13].However,all these methods required high temperature or else the final poducts contain some impurites.Some researches use nonagueous solutions for depostion of bismuth sulfide thin films,but they have got amorphous products [14,15].Yu and Qian reported thermal synthesis of Bi2S3 through a reaction of BiCl3 and thiourea in ethanol
at 140  °C [16].

超细粉体的合成二元硫铋金属硫化物一直关注的焦点,由于其重要的物理和化学性质[12〕、良好的商务应用半导体、颜料、发光器件、太阳能电池、红外探测器、光纤、通讯、现代热电冷却器[3].铋硫化物(备Bi2S3)是直接带隙的材料如130电动[4]和有益的光电二极管列阵[5].通常busmuth硫化物可以直接反应制备了铋、硫磺蒸气船石英高温[6].化学沉积方法用于准备硫化铋铋盐络合的反应,通过乙醇胺水溶液或edta一个含有硫源为硫代乙酰胺等,硫、硫代硫酸钠、硫化氢geseous.但是,这条线路大多透过粉末定形或结晶差〔7月10日].热分解制备铋硫化物还报告了热分解物[11]荒铋、金属ethylxanthate[12],双硫复杂[13].然而,所有这些方法需要高温或含有某些impurites最后翻版.一些研究使用nonagueous解沉积铋硫化物薄膜,但他们的产品有定形[14,15].渝黔报备Bi2S3通过热合成反应及硫乙醇bicl3140℃[16].