Facile synthesis of two-dimensional tailored graphitic carbon nitride with enhanced photoelectrochemical properties through a three-step polycondensation method for photocatalysis and photoelectrochemical immunosensor
Facile synthesis of two-dimensional tailored graphitic carbon nitride with enhanced photoelectrochemical properties through a three-step polycondensation method for photocatalysis and photoelectrochemical immunosensor
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通过三步缩聚方法轻松合成具有增强光电化学性能的二维定制石墨氮化碳，用于光催化和光电化学免疫传感器
DOI：
10.1016/j.snb.2019.01.028
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Shiyun Ai
中科院分区：
文献类型：
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作者：
Hongbin Qi;Bing Sun;Jing Dong;Lin Cui;Tiantian Feng;Shiyun Ai
石墨化氮化碳（g-C3N4）是一种理想的二维（2D）纳米结构，可用于光催化和光电化学（PEC）应用，但可控制地制备二维形状的g-C3N4纳米层/纳米片仍面临挑战。基于温度相关的多态特征，本文提出了一种二维。以双氰胺为前体，通过缩合操作合成了g-C3N4 （g-CNS3）。连续三步热缩聚过程中的温度。与传统一步热聚合法合成的g-CNS1相比，具有膜状形貌的g-CNS3具有更好的可见光吸收能力和更强的PEC性能。g-CNS3具有良好的光催化活性，可以快速去除MB，并作为光活性层构建具有高灵敏度和特异性的PEC免疫传感器，用于检测J亚群禽白血病病毒。在102.14 ~ 103.35 TCID50/mL的线性范围内，检测限为102.08 TCID50/mL。这项工作可能为定制具有优越性能的二维g-C3N4纳米半导体提供了一种新的方案，并揭示了其具有前景的PEC应用。
Graphitic carbon nitride (g-C3N4) is an ideal alternative two-dimensional (2D) nanostructure for photocatalysis and photoelectrochemical (PEC) application, while controllably fabricating 2D shaped g-C3N4 nanolayers/nanosheets is still facing challenges. On the basis of temperature-dependent polymorphic characters, herein, a 2D.extending g-C3N4 (g-CNS3) is synthesized from dicyandiamide as the precursor by operating the condensation.temperature in a continuously three-step thermal polycondensation procedure. The g-CNS3 with film-like morphology showed improved visible-light absorption ability and enhanced PEC performance compared to g-CNS1 synthesized via the traditional one-step thermal polymerization method. Benefiting from its excellent PEC properties, the g-CNS3 exhibited high photocatalytic activity to removal MB with fast kinetics and served as the photoactive layer to construct a PEC immunosensor with high sensitivity and specificity for subgroup J avian leukosis virus detection. A linear range from 102.14 to 103.35 TCID50/mL and a detection limit of 102.08 TCID50/mL were obtained for the PEC immunoassay of the target virus. This work might provide a novel protocol for tailoring shaped 2D g-C3N4 nanosemiconductor with superior properties and shed light on its promising PEC applications.