Preparation of Gold Nanoplates Using Ortho Carbonyl Compounds as Capping Agents for Electrochemical Sensing of Lead Ions.

Preparation of Gold Nanoplates Using Ortho Carbonyl Compounds as Capping Agents for Electrochemical Sensing of Lead Ions.
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使用邻位羰基化合物作为封端剂制备金纳米片用于铅离子的电化学传感

DOI:
10.1186/s11671-021-03521-2
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发表时间:
2021-04-07
影响因子:
--
通讯作者:
Dai X
Dai X
中科院分区:
材料科学3区
文献类型:
--
作者:
Jiang X;Ma J;Jiang G;Xu M;Huang X;Gao G;Dai X

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在这项研究中,金纳米片的合成使用植物分子(没食子酸)的动力学控制模式。纳米片的生长主要是由于封端剂在某些晶面上的特异性吸附。通过系统表征发现,邻位羰基化合物中两个氧原子的间距与金(111)晶面的晶格间距匹配良好,有利于孪晶籽晶的形成,进而有利于片状金纳米颗粒的生长。与裸玻碳电极和球形金纳米颗粒修饰电极相比,金纳米片修饰电极对铅离子的电化学传感活性有显著提高。该修饰电极有望用于重金属废水中铅离子浓度的检测。
In this study, gold nanoplates were synthesized using plant molecules (gallic acid) following a kinetic control mode. The growth of nanoplates is mainly due to the specific adsorption of capping agents on certain crystal facets. Through systematical characterizations, it is found that the distance between two oxygen atoms in ortho carbonyl compounds matches well with the lattice spacing of gold (111) facets exactly, which is beneficial to the formation of twin seeds and further the growth of plate-like gold nanoparticles. The gold nanoplates on glassy carbon electrode show a remarkably improved electrochemical sensing activity of lead ions compared to the bare glassy carbon electrode or spherical gold nanoparticle-modified electrode. The modified electrode is expected to be used in the detection of lead ion concentration in heavy metal wastewater.
使用MnO2纳米线/电还原氧化石墨烯复合材料的多巴胺传感平台有前景
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