本文旨在通过对煤光催化氧化特性的研究，为煤基降解复合材料的制备提供理论基础。在自制的光催化氧化反应器上，以华蓥山煤为典型探讨了煤的光催化氧化反应性，同时利用煤中可进行离子交换的官能团，制得了以煤为载体的负载有过渡金属离子的原位光催化氧化反应催化剂。研究了氧气流速、煤样粒度、光强度、反应温度、煤种、过渡金属离子等因素对煤光催化氧化反应的影响。在氧化反应产物组成和结构分析的基础上，探讨了煤光催化氧化反应的机理及反应动力学，建立了煤光催化氧化降解反应动力学方程。研究表明：氧气流量的大小主要影响煤发生光催化氧化反应的初始反应速率,在氧流速较低的情况下,光氧化反应速度很慢。当氧气流速高于30ml/min时，初期反应速度较快，很快达到平稳氧化。煤样在较大粒径（50目）下，反应速度较低。当煤样的粒径小于200目时反应程度不再受粒径的影响。选择30ml/min的氧气流量和超细煤可以分别消除外扩散和内扩散对煤光催化氧化反应的影响。不同因素对煤光催化氧化的影响显示：光强度增加、温度提高可加速煤的光催化氧化。煤样的粒度减小，光氧化程度增加；在相同条件下，低阶煤比高阶煤具有更高的反应活性；镜煤的光氧化反应性大于丝炭；丝炭的初始反应速率较高。Fe3+、Co2+、Ni2+、Cu2+和Zn2+对煤的光催化氧化均有助催化作用，其中Co2+的助催化作用最明显。从煤在光催化氧化反应过程中腐殖酸含量和反应产物的溶胀度变化，以及对煤光催化氧化性能和不同因素对其影响的研究，推测煤在光催化氧化过程中，涉及到两种混合机理：一个是基于半导体能带理论的光催化氧化反应，另一个是基于煤低温氧化的自由基链式反应。华蓥山原煤和负载Co2+的华蓥山煤的光催化氧化降解动力学研究表明：负载Co2+后煤的反应活化能降低；反应的表观反应级数均为0.6；华蓥山煤光催化氧化降解反应的表观动力学方程可表示为 。通过系统的研究，最终为煤基降解复合材料的制备提供了有益的理论支持。

This article intended to provide theoretical foundation for the preparation of coal-based composites through the investigation of the photo-catalytic oxidation characteristics of coal. Ultra fine coal was prepared using airflow pulverize device and grade methods. Based on the determination of saturation adsorption of some transition metal ion in coal, coal samples load with transition metal ions were prepared by mechanical chemistry interaction method. Pore structure analysis showed that the average aperture, specific surface area and pore volume were increased. The change of weightlessness in the course of photo-catalytic oxidation of coal was measured by manual artificial climate accelerate device. The different influencing factors of photo-catalytic oxidation of coal were analyzed. The effect of oxygen flow and the particle size of coal on photo-catalytic oxidation of coal was studied, and the results showed that the effect of outside diffusion and inside diffusion could be eliminated by choosing 30ml/min oxygen flow and 1250 mesh particle. Characteristics and different influencing factors on photo-catalytic oxidation of coal were studied. Results showed that light intensity and temperature accelerated the process of photo-catalytic oxidation; little particle coal caused great cumulate weightlessness; low rank coal has better reactivity than high rank coal; cumulate weightlessness of vitrain was more than that of fusain; fusain had great reaction rate in initial stage; the transition metal ions such as Fe3+、Co2+、Ni2+、Cu2+ and Zn2+ were catalyst promoter for photo-catalytic oxidation of coal, among which Co2+ was the best catalyst promoter. The structure of reactant and reaction product was determined by FTIR、SEM and XEDS. The results indicated the red shift of hydroxyl absorb peak at 3439cm-1 after loading with Co2+; the content of carbon decrease and the content of oxygen increase in coal (load with Co2+) after photo-catalytic oxidation. During the course of photo-catalytic oxidation of coal, the content of humic acids increase at first and then decease, but the swelling capacity decrease. These results suggested that some bonds were broken and more opened system were formed in coal structure. From the photo-catalytic oxidation of different maceral in coal, it was found that fusain had great reaction rate in initial stage. Based on the kinetics analysis of photo-catalytic oxidation of coal, it was found that two reaction stage occurred during the photo-catalytic oxidation; the activation energy of photo-catalytic oxidation of coal decrease after load with Co2+; apparent reaction order is 0.6; the apparent reaction kinetics equation is . Finally, this paper provided some beneficial theoretical support for the preparation of coal-based composite by systematic study.