Egerton T A, Janus M, Morawski A W
School of Chemical Engineering and Advanced Materials, The Bedson Building University of Newcastle upon Tyne, Newcastle NE1 7RU, UK.
Chemosphere. 2006 May;63(7):1203-8. doi: 10.1016/j.chemosphere.2005.08.074. Epub 2005 Dec 6.
This paper reports the preparation of carbon doped TiO2 electrodes by a modification of a sol-gel route. The electrodes have been characterized by measuring their photocurrent, as a function of applied potential. Their photoelectrocatalytic activity, relative to similar sol-gel electrodes without carbon, has been assessed by measuring the decomposition of a 10 mM sodium oxalate solution. Measurements have been made on electrodes prepared with 2%, 5% and 10% of active carbon. The highest photocurrents and the highest photoelectrocatalytic activity were both obtained with electrodes prepared by heating, at 600 degrees C, electrodes prepared with 5% of active carbon. All the electrodes showed evidence of enhanced photocatalytic activity at 1.2 V. Five percent addition of C double the measured rates of photodegradation, even though, in these preliminary studies, no attempt has been made to optimize the type of carbon or the details of the electrode preparation.
本文报道了通过改进溶胶-凝胶法制备碳掺杂二氧化钛电极的过程。通过测量光电流（作为施加电势的函数）对电极进行了表征。通过测量10 mM草酸钠溶液的分解情况，评估了它们相对于不含碳的类似溶胶-凝胶电极的光电催化活性。对含有2%、5%和10%活性炭制备的电极进行了测量。在600℃下加热含有5%活性炭制备的电极，所得到的电极具有最高的光电流和最高的光电催化活性。所有电极在1.2 V时均显示出光催化活性增强的迹象。即使在这些初步研究中未尝试优化碳的类型或电极制备的细节，添加5%的碳仍使测得的光降解速率提高了一倍。
