Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China.
Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, PR China.
J Hazard Mater. 2017 Jan 5;321:703-710. doi: 10.1016/j.jhazmat.2016.09.069. Epub 2016 Sep 29.
The STEP concept has successfully been demonstrated for driving chemical reaction by utilization of solar heat and electricity to minimize the fossil energy, meanwhile, maximize the rate of thermo- and electrochemical reactions in thermodynamics and kinetics. This pioneering investigation experimentally exhibit that the STEP concept is adapted and adopted efficiently for degradation of nitrobenzene. By employing the theoretical calculation and thermo-dependent cyclic voltammetry, the degradation potential of nitrobenzene was found to be decreased obviously, at the same time, with greatly lifting the current, while the temperature was increased. Compared with the conventional electrochemical methods, high efficiency and fast degradation rate were markedly displayed due to the co-action of thermo- and electrochemical effects and the switch of the indirect electrochemical oxidation to the direct one for oxidation of nitrobenzene. A clear conclusion on the mechanism of nitrobenzene degradation by the STEP can be schematically proposed and discussed by the combination of thermo- and electrochemistry based the analysis of the HPLC, UV-vis and degradation data. This theory and experiment provide a pilot for the treatment of nitrobenzene wastewater with high efficiency, clean operation and low carbon footprint, without any other input of energy and chemicals from solar energy.
STEP 概念已成功通过利用太阳能和电力来驱动化学反应得到证明，以最小化化石能源的使用，同时最大限度地提高热力学和动力学中热和电化学反应的速率。这项开创性的研究从实验上表明，STEP 概念有效地适用于降解硝基苯。通过理论计算和温度依赖的循环伏安法，发现硝基苯的降解电位明显降低，同时电流大大增加，而温度升高。与传统的电化学方法相比，由于热和电化学效应的共同作用以及间接电化学氧化向直接电化学氧化的转变，用于氧化硝基苯，显著显示出高效和快速的降解速率。通过 HPLC、UV-vis 和降解数据的分析，基于热化学和电化学的结合，可以提出和讨论 STEP 降解硝基苯的机制的明确结论。该理论和实验为高效、清洁、低碳足迹的硝基苯废水处理提供了一个范例，无需太阳能以外的任何其他能源和化学品的投入。
