• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >In situ growth of carbon dots on TiO2 nanotube arrays for PEC enzyme biosensors with visible light response
【24h】

In situ growth of carbon dots on TiO2 nanotube arrays for PEC enzyme biosensors with visible light response

机译：具有可见光响应的PEC酶生物传感器的TiO2纳米管阵列上碳点的原位生长

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Carbon dots (CDs) were grown in situ on secondary anodized TiO _(2) nanotube arrays (TiO _(2) NTAs) via a hydrothermal method. The combination of CDs and TiO _(2) NTAs enhanced the photoelectrochemical performance. Morphology, structure, and elemental composition of the CDs were characterized. No simple physical adsorption was found between the CDs and TiO _(2) , but chemical bonds were formed. UV-vis absorption and fluorescence spectroscopy showed that the CDs could enhance the absorption of TiO _(2) in the visible and near-infrared regions. Owing to their up-conversion fluorescence properties, the CDs could convert low-energy photon absorption into high-energy photons, which may be used to excite TiO _(2) to produce a stronger photoelectric response. Moreover, the CDs could effectively transport electrons and accept holes, thus contributing to the effective separation of electrons and holes during photoexcitation. Finally, the PEC biosensor was prepared by immobilizing glucose oxidase (GOx) on the surface of the composite. The PEC biosensor exhibited a broad range of 0.1–18 mM with a detection limit of 0.027 mM under visible irradiation because the composite material reflected strong light absorption for visible light, good conductivity, and good biocompatibility.
机译：碳点（CDs）通过水热法原位生长在二次阳极氧化的TiO_（2）纳米管阵列（TiO_（2）NTAs）上。 CD和TiO _（2）NTA的组合增强了光电化学性能。 CD的形态，结构和元素组成得到了表征。在CD和TiO _（2）之间未发现简单的物理吸附，但形成了化学键。紫外可见吸收和荧光光谱显示，CD可以增强可见光和近红外区域中TiO _（2）的吸收。由于其上转换荧光特性，CD可以将低能光子吸收转换为高能光子，可用于激发TiO_（2）产生更强的光电响应。此外，CD可以有效地传输电子并接受空穴，从而有助于在光激发过程中有效分离电子和空穴。最后，通过将葡萄糖氧化酶（GOx）固定在复合材料的表面上来制备PEC生物传感器。 PEC生物传感器在可见光照射下的显示范围为0.1-18 mM，检测极限为0.027 mM，这是因为复合材料对可见光具有很强的吸光性，良好的导电性和良好的生物相容性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号