Biosynthesis of zinc sulfide quantum dots using waste off-gas from a metal bioremediation process
Biosynthesis of zinc sulfide quantum dots using waste off-gas from a metal bioremediation process
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利用金属生物修复过程中的废气生物合成硫化锌量子点
DOI：
10.1039/c6ra17236a
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发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
Murray A
中科院分区：
文献类型：
--
作者：
Murray A
硫酸盐还原菌（SRB）和古细菌介导的硫酸盐异化还原可用于酸性矿山废水（AMD）的修复。SRB产生的硫化氢（H2S/HS−）作为硫化物生物矿物从AMD中去除有毒金属。为此，SRB通常被安置在与产生金属硫化物的反应器容器分开的反应器容器中; H2S以溶液或气体形式被输送到含有AMD的容器中，从而允许金属沉淀的受控分离并促进增强的过程控制。诸如光电子学的工业在各种应用中使用量子点（QD），例如作为发光二极管和在太阳能光电器件中。量子点是具有半导体能带的纳米晶体，允许它们吸收光并在特定波长下重新发射，将电子转移到更高的能量，然后在弛豫阶段发射光。传统的QD生产是昂贵和/或复杂的。我们报告使用废H2S气体从AMD的补救过程中合成硫化锌量子点，这是无法区分的化学制备的同行就其物理和光学性质，并强调潜在的经验过程中转换成一个高价值的产品的气体“废物”。
Dissimilatory reduction of sulfate, mediated by various species of sulfate-reducing bacteria (SRB) and a few characterized species of archaea, can be used to remediate acid mine drainage (AMD). Hydrogen sulfide (H2S/HS−) generated by SRB removes toxic metals from AMD as sulfide biominerals. For this, SRB are usually housed in separate reactor vessels to those where metal sulfides are generated; H2S is delivered to AMD-containing vessels in solution or as a gas, allowing controlled separation of metal precipitation and facilitating enhanced process control. Industries such as optoelectronics use quantum dots (QDs) in various applications, e.g. as light emitting diodes and in solar photovoltaics. QDs are nanocrystals with semiconductor bands that allow them to absorb light and re-emit it at specific wavelength couples, shifting electrons to a higher energy and then emitting light during the relaxation phase. Traditional QD production is costly and/or complex. We report the use of waste H2S gas from an AMD remediation process to synthesize zinc sulfide QDs which are indistinguishable from chemically prepared counterparts with respect to their physical and optical properties, and highlight the potential for a empirical process to convert a gaseous “waste” into a high value product.
通过新颖的嗜酸性磺胺生成细菌联盟从酸性矿水中选择性去除过渡金属。
影响因子：
5.7
作者：
Nancucheo I;Johnson DB
通讯作者：
Johnson DB
影响因子：
--
作者：
Shahid, Robina;Toprak, Muhammet S.;Muhammed, Mamoun
通讯作者：
Muhammed, Mamoun
DOI：
10.1016/b978-0-08-096357-0.00006-6
发表时间：
2012-01-01
期刊：
METAL NANOPARTICLES AND NANOALLOYS
影响因子：
--
作者：
Johnston, Roy L.
通讯作者：
Johnston, Roy L.