A novel hollow sphere bismuth oxide doped mesoporous carbon nanocomposite material derived from sustainable biomass for picomolar electrochemical detection of lead and cadmium
A novel hollow sphere bismuth oxide doped mesoporous carbon nanocomposite material derived from sustainable biomass for picomolar electrochemical detection of lead and cadmium
复制标题
DOI：
10.1039/c6ta04881a
复制
发表时间：
2016-09
影响因子：
--
通讯作者：
Kemal Zeinu;Huijie Hou;Bingchuan Liu;Xiqing Yuan;L. Huang;Xiaolei Zhu;Jingping Hu;Jiakuan Yang;S. Liang;Xu Wu
中科院分区：
文献类型：
--
作者：
Kemal Zeinu;Huijie Hou;Bingchuan Liu;Xiqing Yuan;L. Huang;Xiaolei Zhu;Jingping Hu;Jiakuan Yang;S. Liang;Xu Wu
成功制造了一种新型超灵敏、选择性和低成本电化学传感器，其基于源自可持续生物质材料的空心球氧化铋掺杂介孔碳气凝胶纳米复合材料，可同时检测皮摩尔水平的 Pb2+ 和 Cd2+。在这种纳米复合材料中，我们成功地结合了用于分析物预富集的具有介孔的超大表面积生物质衍生碳基质的优点以及用于高灵敏度重金属传感的氧化铋空心球结构的优异电分析活性。在优化条件下，该电极材料在环境条件下表现出非常低的检测限，Pb2+ 为 1.72 pM，Cd2+ 为 1.58 pM，这是使用活性炭检测 Pb2+ 和 Cd2+ 记录的最低检测限。此外，由于不同金属离子浓度范围内吸附动力学的差异，观察到两个较宽的线性范围：0.5 pM至10 pM和10 pM至100 pM。纳米复合传感器材料表现出优异的再现性和良好的抗干扰性。此外，还演示了实际水分析的应用，结果与电感耦合等离子体发射光谱（ICP-OES）的测量高度一致。
A novel ultrasensitive, selective and low cost electrochemical sensor based on a hollow sphere bismuth oxide doped mesoporous carbon aerogel nanocomposite derived from a sustainable biomass material was successfully fabricated for simultaneous Pb2+ and Cd2+ detection at picomolar levels. In this nanocomposite material, we successfully brought together the advantages of an extraordinarily large surface area biomass derived carbon matrix with mesopores for analyte pre-enrichment and the excellent electroanalytical activity of the bismuth oxide hollow sphere structure for highly sensitive heavy metal sensing. Under optimized conditions, this electrode material exhibited a very low detection limit of 1.72 pM for Pb2+ and 1.58 pM for Cd2+ under ambient conditions, the lowest ever limit of detection recorded for the detection of both Pb2+ and Cd2+ using activated carbon. Furthermore, two wide linear ranges from 0.5 pM to 10 pM and from 10 pM to100 pM were observed due to the differences of adsorption dynamics at different metal ion concentration ranges. The nanocomposite sensor material demonstrated excellent reproducibility and great resistance to interference. Furthermore, the application for real water analysis was demonstrated and the result was highly consistent with the measurement from inductively coupled plasma optical emission spectroscopy (ICP-OES).