近年来,量子点敏化太阳能电池(Quantum dots-sensitized solar cells,QDSSCs)因其制备成本低、工艺简单及量子点(Quantum dots,QDs)的尺寸效应、多激子效应和高的理论转化率等优点,受到广泛关注。由其结构和原理可知,对电极作为QDSSCs...近年来,量子点敏化太阳能电池(Quantum dots-sensitized solar cells,QDSSCs)因其制备成本低、工艺简单及量子点(Quantum dots,QDs)的尺寸效应、多激子效应和高的理论转化率等优点,受到广泛关注。由其结构和原理可知,对电极作为QDSSCs的重要组成部分之一,对QDSSCs的电池的光电转化效率有重要影响。铜的硫化物是当前最常用和催化效果最好的对电极,本文首先介绍了QDSSCs的工作原理,然后重点总结了铜的硫化物对电极的分类、制备方法及优缺点,并就对电极的发展前景进行了展望。展开更多
We conducted two-stage acidification-bioleaching experiments to probe the feasibility of bioleaching for a kind of mixed alkaline copper oxide and sulphide mineral. We used the uniform design method for data analysis ...We conducted two-stage acidification-bioleaching experiments to probe the feasibility of bioleaching for a kind of mixed alkaline copper oxide and sulphide mineral. We used the uniform design method for data analysis and experimental optimization, with initial pH value, pulp density, inoculation of bacteria and ferrous iron concentration selected as the influential factors. Polynomial regression shows that the four factors sequentially influence the copper recovery by 14.430%, 8.555%, 1.982% and 3.895%. Acid equilibrium in the bioleaching system is mainly influenced by alkaline gangue content, chemical reactions and bacterial activity. A maximal portion of refractory copper extracted reaches 71.08%. The dynamic analysis of copper recovery indicates that bioleaching goes through a lag leaching phase, prime leaching phase and leaching stationary phase corresponding to the growth phases of bacteria. Compared with the predicted value of 80.87%, the confirmatory experiment observes a 78.21% copper recovery under the optimal conditions of pH of 1.5, pulp density of 5%, bacteria inoculation of 30% and initial ferrous iron concentration of 9 g L-1. Results suggest that bioleaching is technically feasible to improving total copper recovery.展开更多
文摘近年来,量子点敏化太阳能电池(Quantum dots-sensitized solar cells,QDSSCs)因其制备成本低、工艺简单及量子点(Quantum dots,QDs)的尺寸效应、多激子效应和高的理论转化率等优点,受到广泛关注。由其结构和原理可知,对电极作为QDSSCs的重要组成部分之一,对QDSSCs的电池的光电转化效率有重要影响。铜的硫化物是当前最常用和催化效果最好的对电极,本文首先介绍了QDSSCs的工作原理,然后重点总结了铜的硫化物对电极的分类、制备方法及优缺点,并就对电极的发展前景进行了展望。
基金Funded by the National Natural Science Foundation of China (No. 50934002)New Century Excellent Talents (No. NECT-07-0070)Yunnan Provincial Programs for Science and Technology Innovation (No. 2007AD001)
文摘We conducted two-stage acidification-bioleaching experiments to probe the feasibility of bioleaching for a kind of mixed alkaline copper oxide and sulphide mineral. We used the uniform design method for data analysis and experimental optimization, with initial pH value, pulp density, inoculation of bacteria and ferrous iron concentration selected as the influential factors. Polynomial regression shows that the four factors sequentially influence the copper recovery by 14.430%, 8.555%, 1.982% and 3.895%. Acid equilibrium in the bioleaching system is mainly influenced by alkaline gangue content, chemical reactions and bacterial activity. A maximal portion of refractory copper extracted reaches 71.08%. The dynamic analysis of copper recovery indicates that bioleaching goes through a lag leaching phase, prime leaching phase and leaching stationary phase corresponding to the growth phases of bacteria. Compared with the predicted value of 80.87%, the confirmatory experiment observes a 78.21% copper recovery under the optimal conditions of pH of 1.5, pulp density of 5%, bacteria inoculation of 30% and initial ferrous iron concentration of 9 g L-1. Results suggest that bioleaching is technically feasible to improving total copper recovery.
