Photoelectrochemical Properties of TiO2 Nanorod Arrays Loaded with Carbon Quantum Dots

SHI Xin; XU Jian-ping; LI Lin-lin; WANG Chang; LI Lan

doi:10.3788/fgxb20153608.0898

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Photoelectrochemical Properties of TiO₂ Nanorod Arrays Loaded with Carbon Quantum Dots

更新时间：2020-08-12

- Photoelectrochemical Properties of TiO₂ Nanorod Arrays Loaded with Carbon Quantum Dots
- Chinese Journal of Luminescence Vol. 36, Issue 8, Pages: 898-905(2015)
- 作者机构：
  
  1. 天津理工大学理学院天津,300384
  2. 天津理工大学材料物理研究所天津,300384
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153608.0898
  CLC： O472.4;O471.5
- Received：26 April 2015，
  
  Revised：24 June 2015，
  
  Published Online：05 June 2015，
  
  Published：03 August 2015
- 稿件说明：
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石鑫, 徐建萍, 李霖霖等. 碳量子点负载TiO2纳米棒阵列的光电化学性能[J]. 发光学报, 2015,36(8): 898-905

SHI Xin, XU Jian-ping, LI Lin-lin etc. Photoelectrochemical Properties of TiO2 Nanorod Arrays Loaded with Carbon Quantum Dots[J]. Chinese Journal of Luminescence, 2015,36(8): 898-905
石鑫, 徐建萍, 李霖霖等. 碳量子点负载TiO2纳米棒阵列的光电化学性能[J]. 发光学报, 2015,36(8): 898-905 DOI： 10.3788/fgxb20153608.0898.

SHI Xin, XU Jian-ping, LI Lin-lin etc. Photoelectrochemical Properties of TiO2 Nanorod Arrays Loaded with Carbon Quantum Dots[J]. Chinese Journal of Luminescence, 2015,36(8): 898-905 DOI： 10.3788/fgxb20153608.0898.

摘要

研究了碳量子点负载的TiO

纳米棒阵列光阳极的光电化学过程和光催化行为.实验发现碳量子点的引入使TiO

纳米棒阵列在可见光区域的吸收强度增强

对可见光的响应电流提高3倍

光照下的开路电位增加了2.5%

光生载流子的转移和传输能力得到相应提高.光阳极对亚甲基蓝的降解特性显示

碳量子点的引入使TiO

纳米棒在可见光照射下的催化效率由25%提高到33%.利用电化学交流阻抗谱(EIS)、Mott-Schottky曲线讨论了光影响下的电荷运动过程

表明TiO

纳米棒阵列负载碳量子点后的电荷转移电阻减小

电子寿命增加;碳量子点的负载使TiO

纳米棒的平带电位负移

导带位置提高

电子的还原能力增强.

Abstract

The photoelectrochemical (PEC) performance and photocatalytic activity of TiO

nanorod arrays (NRs) loaded with carbon quantum dots (CQDs) were investigated. In comparison with TiO

NRs

the absorption ability of TiO

NRs loaded with CQDs was enhanced. The transient photocurrent and open-circuit potential under visible light illumination were increased of 300% and 2.5%

respectively. After loaded with CQDs

the photocatalytic degradation efficiency of methylene blue (MB) under visible light illumination was increased from 25% to 33%. The electrochemical impedance spectra (EIS) and Mott-Schottky plots were measured to investigate the charge movement under the visible light illumination. The results suggest that the charge transfer resistance is reduced and the electron lifetime is increased for TiO

NRs loaded with CQDs. The loading of CQDs can induce the flat-band potential negative shift and the conduction band position raise

resulting in the enhancement of electron reduction properties.

关键词

Keywords

references

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