One-pot synthesis of BiPO4 functionalized reduced graphene oxide with enhanced photoelectrochemical performance for selective and sensitive detection of chlorpyrifos
One-pot synthesis of BiPO4 functionalized reduced graphene oxide with enhanced photoelectrochemical performance for selective and sensitive detection of chlorpyrifos
复制标题
一锅法合成具有增强光电化学性能的 BiPO4 功能化还原氧化石墨烯，用于毒死蜱的选择性和灵敏检测
DOI：
10.1039/c5ta02629f
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发表时间：
2015
影响因子：
11.9
通讯作者：
Kun Wang
中科院分区：
文献类型：
--
作者：
Jing Qian;Zhenting Yang;Chengquan Wang;Kan Wang;Qian Liu;Ding Jiang;Yuting Yan;Kun Wang
设计和开发具有先进纳米材料的光电化学（PEC）传感器对于实现灵敏和廉价的检测目标具有重要意义。采用溶剂热法制备了一系列磷酸铋（BiPO 4）功能化的还原氧化石墨烯（BiPO 4-rGO）纳米复合材料。与纯BiPO 4纳米颗粒（NPs）相比，具有不同起始氧化石墨烯（GO）与BiPO 4质量比的所有所制备的BiPO 4-rGO NCs均显示出增强的PEC响应。在此基础上，选择具有最佳PEC响应的BiPO 4-rGO0.03纳米粒子（GO与BiPO 4的起始质量比为0.03）用于毒死蜱的PEC测定。随着毒死蜱的加入，BiPO 4纳米粒子表面形成了一种新型的双毒死蜱络合物，这种络合物增加了BiPO 4纳米粒子的空间位阻，导致电子转移向电极表面的衰减，从而导致光电流的明显降低。所设计的PEC传感器对毒死蜱的线性响应范围为0.05 - 80 ng mL−1，检测下限为0.02 ng mL−1（S/N = 3）。常见的干扰物如甲基对硫磷、五氯苯酚、西维因等对毒死蜱的检测没有明显影响，但这些物质对毒死蜱的PEC传感有一定的影响。将该方法用于废水中毒死蜱的测定，结果令人满意。因此，预期所得到的BiPO 4-rGO NCs可以用作PEC传感相关应用的潜在光活性材料。
The design and exploitation of photoelectrochemical (PEC) sensors with advanced nanomaterials is of great importance to achieving the goal of sensitive and inexpensive detection. In this paper, a series of bismuth phosphate (BiPO4) functionalized reduced graphene oxide (BiPO4–rGO) nanocomposites (NCs) were prepared using a one-step solvothermal method. Compared with the pure BiPO4 nanoparticles (NPs), all of the as-prepared BiPO4–rGO NCs with different starting mass ratios of graphene oxide (GO) to BiPO4 showed an enhanced PEC response. On this basis, the BiPO4–rGO0.03 NCs (the starting mass ratio of GO to BiPO4 = 0.03) with the best PEC response were used for the PEC determination of chlorpyrifos. With the addition of chlorpyrifos, the formation of a Bi–chlorpyrifos complex on the BiPO4 NPs gave rise to an increase in steric hindrance which caused the electron transfer of BiPO4 NPs to trail off towards the electrode surface, and consequently resulted in an obvious decrease in photocurrent. The designed PEC sensor displayed a linear response for chlorpyrifos in the range from 0.05 to 80 ng mL−1 with a low detection limit of 0.02 ng mL−1 (S/N = 3). The common interferents such as methyl parathion, pentachlorophenol, and carbaryl had no obvious influence on the detection of chlorpyrifos, although these substances were reported to influence the PEC sensing of chlorpyrifos to some extent. The applicability of this method was also investigated by the determination of chlorpyrifos in wastewater samples with satisfactory results. Thus, it is expected that the resulting BiPO4–rGO NCs can serve as a potential photoactive material for PEC sensing related applications.