利用太阳能光催化水分解制氢是解决当前能源和环境问题的一条有效途径。高效的半导体光催化水分解体系需具有强的吸光能力，适宜的带宽和能级位置以及与水分子间丰富的界面反应位点等。共轭微孔聚合物兼具微孔聚合物和有机半导体材料的特点，具有轻质，高稳定性，强吸光，高比表面积和能级位置可调等性能。本项目拟采用偶联缩聚反应制备不同结构的共轭微孔聚合物；通过共聚单体的选择组合调控所得聚合物的比表面积和孔径尺寸及分布；通过在单体中引入推拉电子结构单元等优化聚合物带宽及价带和导带能级位置。系统研究聚合物结构、比表面积、孔径分布、吸光强度及能级等因素对其光催化水分解制氢能力的影响，探讨共轭微孔聚合物光催化制氢机制；使用多孔聚合物负载铂、二氧化钛纳米粒子等助催化剂期望进一步提高光催化效率，研究共轭微孔聚合物与助催化剂之间的协同作用机理。本研究将为开发高效水分解制氢光催化剂提供新思路，具有重要的学术意义和实际应用价值。

Photocatalytic water-splitting hydrogen evolution using solar energy is an effective way to solve the current energy and environmental issues. Semiconductor photocatalytic systems for efficient water splitting require strong light absorption capability, suitable band gap and energy levels, and rich interface reactive sites with water molecules. Conjugated microporous polymers (CMPs) feature the properties of both microporous polymers and organic semiconductor materials, such as low density, high stability, strong light absorption, high specific surface area and adjustable energy levels. In this proposal, polycondensation coupling reactions will be utilized to prepare CMPs with different structures. Specific surface area and pore size and pore size distribution of the resulting microporous polymers will be controlled through selective combination of various comonomers. Band gap and the valence and conduction band energy levels of the polymers will be optimized through the introduction of electron-donating or electron-withdrawing units into the monomer structures. Systematic studies will be conducted to gain insights of the influences of polymer structure, specific surface area, pore size distribution, light absorption intensity and energy levels of the CMPs on their photocatalytic water-splitting hydrogen evolution capability. Meanwhile, the mechanism beneath the CMPs photocatalytic hydeogen evolution will be discussed. To further improve photocatalytic activity, platinum or TiO2 nanoparticles will be loaded into the CMPs as cocatalysts and synergistic effect of CMPs and these cocatalysts will be studied. It is anticipated that this research can open up a new door to develop efficient water splitting hydrogen evolution photocatalysts, which possesses important academic significance and practical application value.