Trichosporon montevideense WIN合成纳米金的催化特性

发布时间：2018-01-04 16:43

本文关键词：Trichosporon montevideense WIN合成纳米金的催化特性　出处：《微生物学通报》2017年08期 　论文类型：期刊论文

【摘要】：【目的】考察菌株Trichosporon montevideense WIN合成纳米金的催化特性及应用。【方法】利用活性WIN菌作用不同浓度HAu Cl_4(1、2和4 mmol/L)合成纳米金的特性,分别利用活性WIN菌和灭活WIN菌合成纳米金,分析合成纳米金的形貌、粒径及其催化特性。【结果】HAu Cl_4浓度为1 mmol/L时,菌株WIN合成了纳米金,HAu Cl_4浓度为2 mmol/L和4 mmol/L时,菌株WIN合成了纳米金及较大尺寸的金颗粒。通过紫外-可见光谱扫描、透射电子显微镜分析,发现活性和灭活WIN菌均能还原Au~(3+)合成纳米金,合成的纳米金均以球形为主,还有少量三角形、四边形及六边形。活性WIN菌合成的纳米金粒径范围为3 nm-252 nm,平均粒径为45.2 nm,而灭活WIN菌合成的纳米金为1 nm-271 nm,平均粒径为38.3 nm。活性和灭活WIN菌合成的纳米金对还原4-硝基苯酚的催化速率分别为2.76×10~(-3)s~(-1)和4.84×10~(-3)s~(-1)。【结论】菌株Trichosporon montevideense WIN的活性及灭活细胞均可以合成纳米金,且合成的纳米金具有良好的催化特性,在催化去除环境中难降解污染物中具有一定的应用前景。
[Abstract]:[Objective] investigate the catalytic properties and application of strain Trichosporon montevideense WIN synthesis of gold nanoparticles. [method] the effect of active WIN bacteria with different concentrations of HAu (1,2 Cl_4 and 4 mmol/L) characteristic of the synthesis of gold nanoparticles, respectively using activated and inactivated bacteria strain WIN WIN synthesis of gold nanoparticles, morphology analysis synthesis of gold nanoparticles, particle size and its catalytic properties. [results] HAu Cl_4 concentration was 1 mmol/L, gold nanoparticles synthesized strains WIN, HAu and Cl_4 concentration of 2 mmol/L and 4 mmol/L, gold particles of gold nanoparticles and the larger size of the synthesized WIN strain. By UV Vis scanning and transmission electron microscopy analysis found that activated and inactivated WIN bacteria are able to reduce Au~ (3+) synthesis of gold nanoparticles, gold nanoparticles synthesized were mainly spherical, and a triangle, quadrangle and hexagon. The activity of WIN bacteria synthesized nano gold particle size in the range of 3 nm-252 nm, the average particle size of 45.2 nm, The inactivated bacteria into the synthesis of gold nanoparticles WIN 1 nm-271 nm, the average particle size is 38.3 nm nm. activity and inactivation of WIN bacteria on the catalytic synthesis of gold rate reduction of 4- nitro phenol were 2.76 * 10~ (-3) s~ (-1) and 4.84 * 10~ (-3) s~ (-1) [Conclusion. Montevideense] strain Trichosporon WIN activity and inactivated cells can synthesize gold nanoparticles, and the nano hardware synthesis has good catalytic properties in catalytic removal, with a certain application environment of refractory pollutants.

【作者单位】：工业生态与环境工程教育部重点实验室大连理工大学环境学院;工业生态与环境工程教育部重点实验室大连理工大学食品与环境学院;
【基金】：国家自然科学基金项目(No.51508068) 新世纪优秀人才支持计划项目(No.NCET-13-0077) 中央高校基本科研业务费专项资金项目(No.DUT14YQ107)~~
【分类号】：O643.36;TB383.1
【正文快照】： 纳米金颗粒一般指粒径为1 nm-100 nm的金颗粒[1],由于其特殊的结构和表面性能及良好的稳定性,被广泛应用于化学催化[2]、生物传感器[3]、生物医药[4]等领域。目前合成纳米金的方法有物理法[5]、化学法[6]和生物法[7]。相比物理法和化学法,生物法合成纳米金绿色环保无污染,且合

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