针对生物柴油副产甘油废水产生量大、处理和利用困难，农业生产中高效环保叶面肥市场需求广阔的现状，申请人基于良好的光催化固氮研究基础，提出构建甘油供电子太阳光催化固氮为高效叶面肥体系，以实现废物资源化、全过程清洁化的目的。.太阳光催化固氮具有电子利用效率不高、量子产率低的问题，本申请通过催化剂能带调配与修饰改性等手段，拓展催化剂吸收光谱，加速光生电子迁移，构建太阳发激发电子空穴高效分离体系。同时辅以化学计算、同位素示踪，关注强还原自由基的生成，研究甘油在催化剂表面的非均相固氮反应路径、溶液中均相固氮反应路径，提高光催化固氮效率。筛选出环境友好、固氮高效的催化剂，评估叶面固氮效果。基于现代材料物理和化学表征手段，结合电子顺磁共振、四极杆飞行时间质谱、原位傅立叶红外等，探明体系碳、氮平衡、自由基生成及电子迁移，揭示体系的电子转移机制,构建甘油供电子太阳光催化固氮为高效、环保叶面肥技术与理论体系。

Recently, with the rapidly increased production of biodiesel, there are a large amount of glycerol wastewater (byproducts) generated, which are difficult to be disposed and utilized. The high efficient and environmental friendly foliar fertilizer has broad demand in agriculture field. As a result, the project team tries to construct a novel system of solar photocatalytic nitrogen fixation for efficient foliar fertilizer with glycerol as electron donor, based on previously firm foundation of photocatalytic nitrogen fixation research. The ultimate goal of this project is to achieve waste recycling and cleaning production process..In this work, much effort will be devoted to solve the problem of low utilization efficiency of solar-excited electrons and low quantum yield of nitrogen fixation in the novel system. The project team employs strategy of energy band modulation and catalyst modification to enhance the solar light absorption and accelerate electrons transfer therefore. Moreover, coupling homogeneous photocatalytic nitrogen fixation pathway with heterogeneous reaction significantly improves photocatalytic nitrogen fixation rate. Density functional theory (DFT) calculation and isotope tracer technique will be used to investigate the generation of high reducibility free radicals which is important in homogeneous nitrogen fixation pathway. Environmental and efficient nitrogen fixation photocatalysts will be selected to evaluate the effect of foliar nitrogenous fertilizer..Physical and chemical characterization methods, such as quadrupole-time of flight mass spectrometry, DFT calculations, in situ fourier infrared technique will be used to investigate the C, N elements balance, radicals formation mechanism, and pathways of nitrogen fixation. Therefore, the electron transfer mechanism of nitrogen fixation can be revealed..Consequently, this research will devote to constructing theory and technical system of solar photocatalytic nitrogen fixation for efficient and environmental foliar fertilizer with glycerol as electron donor.