开展半导体矿物-非光合微生物耦合转化CO2基础研究对解决CO2温室气体问题有重要意义。当前，溶解氧影响半导体矿物光电子/非光合微生物耦合转化CO2问题亟待解决，其中调控矿物光电子与H+和溶解氧反应动力学过程是解决该问题的关键。本项目拟结合前期研究硫镉矿/富里酸根耦合影响粪产碱杆菌生长代谢的工作基础，拓展关注土壤微生物胞外代谢产物和土壤有机质中常见的谷氨酸根、富里酸根、胡敏酸根等成分，聚焦其与锐钛矿和硫镉矿耦合形成半导体矿物/多元有机弱酸根界面，(1) 深入研究H+和溶解氧在该耦合界面上的吸附及结构重组规律；(2) 重点探讨多元有机弱酸根对矿物光电子与H+和溶解氧反应动力学过程的影响规律；(3) 探究多元有机弱酸根成分保护热醋穆尔氏菌和真养产碱杆菌生长代谢的实现机制；为解决溶解氧影响半导体矿物光电子/非光合微生物耦合转化CO2问题提供科学理论及依据。

The research of semiconductor mineral/non-photosynthetic microorganism for CO2 conversion is of great significance to solve CO2 greenhouse gases. At present, the dissolved oxygen has negative effect on the CO2 conversion efficiency of semiconductor photoelectrons/non-photosynthetic microorganism. To address the negative effect of dissolved oxygen, the key step is controlling the kinetics of semiconductor photoelectrons that react with H+ and dissolved oxygen. In our previous work, sulfur cadmium and fulvic acid radical have been found have great influence on the growth and metabolism of Alcaligenes faecalis. It is well known that glutamate, fulvic and humic acid radical are typical polybasic organic acid composition in soil organic matter and extracellular metabolites of soil microorganism. When the typical polybasic organic acid radicals adsorbed on the surface of anatase and sulfur cadmium, semiconductor mineral/polybasic organic acid radical interface will be formed. In the research project, we will study the effect of glutamate, fulvic and humic acid radical on the adsorption and structural reorganization of H+ and dissolved oxygen, the kinetics of anatase and sulfur cadmium photoelectrons that react with H+ and dissolved oxygen, and the growth and metabolism of Moorella thermoacetica and Ralstonia eutropha. On the basis of our project, new scientific theories and methods will be developed for CO2 conversion technology in semiconductor mineral/non-photosynthesizing microorganism system.