Li Dawei, Zang Jun, Zhang Jin, Ao Kelong, Wang Qingqing, Dong Quanfeng, Wei Qufu
Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China.
State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Materials (Basel). 2016 Apr 12;9(4):282. doi: 10.3390/ma9040282.
Carbon xerogel-zinc oxide (CXZnO) composites were synthesized by a simple method of sol-gel condensation polymerization of formaldehyde and resorcinol solution containing zinc salt followed by drying and thermal treatment. ZnO nanoparticles were observed to be evenly dispersed on the surfaces of the carbon xerogel microspheres. The as-prepared CXZnO composites were mixed with laccase (Lac) and Nafion to obtain a mixture solution, which was further modified on an electrode surface to construct a novel biosensing platform. Finally, the prepared electrochemical biosensor was employed to detect the environmental pollutant, catechol. The analysis result was satisfactory, the sensor showed excellent electrocatalysis towards catechol with high sensitivity (31.2 µA·mM), a low detection limit (2.17 µM), and a wide linear range (6.91-453 µM). Moreover, the biosensor also displayed favorable repeatability, reproducibility, selectivity, and stability besides being successfully used in the trace detection of catechol existing in lake water environments.
通过甲醛与含有锌盐的间苯二酚溶液进行溶胶 - 凝胶缩聚反应，随后干燥和热处理的简单方法合成了碳干凝胶 - 氧化锌（CXZnO）复合材料。观察到ZnO纳米颗粒均匀地分散在碳干凝胶微球的表面上。将制备好的CXZnO复合材料与漆酶（Lac）和Nafion混合以获得混合溶液，该混合溶液在电极表面进一步修饰以构建新型生物传感平台。最后，将制备的电化学生物传感器用于检测环境污染物邻苯二酚。分析结果令人满意，该传感器对邻苯二酚表现出优异的电催化性能，具有高灵敏度（31.2 μA·mM）、低检测限（2.17 μM）和宽线性范围（6.91 - 453 μM）。此外，该生物传感器除了成功用于湖水环境中邻苯二酚的痕量检测外，还表现出良好的重复性、再现性、选择性和稳定性。
