目前，人类日常使用的医药与个人护理品（PPCPs）所造成的污染严重影响着整个生态系统的平衡和生物体的健康，使得该类污染物降解技术的研发成为关注度很高的课题。其中，光催化氧化技术具有降解速度快、矿化效果高的优势，可以耦合过二硫酸盐（PDS），构建光催化氧化协同PDS复合体系，该复合体系具有高效降解PPCPs类污染物的能力。本文选取PPCPs类污染物中检测率偏高的布洛芬（IBU）作为目标污染物，利用PDS与光催化氧化技术的协同作用，与银掺杂酸改性氮化碳光催化剂（Ag/ag-C3N4）组成复合体系，并探究该体系对IBU的降解性能。主要的研究内容和结论如下： （1）三聚氰胺通过浓盐酸进行改性，经马弗炉高温煅烧生成酸改性的石墨相氮化碳（acidified g-C3N4，简称ag-C3N4）。使用SEM、TEM、XRD、FT-IR和XPS表征手段对g-C3N4和ag-C3N4进行了对比性研究，结果表明ag-C3N4具有更为规则致密的层状结构，并且g-C3N4和ag-C3N4具有相似的晶型、化学键和化学结构、化学态和组分。对这两种催化剂的BET测试数据表明，和g-C3N4相比，酸改性法将ag-C3N4比表面积值增大了3倍。紫外-可见漫反射光谱（UV-vis）、荧光光谱（PL）和Mott-Schottky测试结果证明了ag-C3N4具有比g-C3N4略高的可见光吸收性和光生载流子分离率，并计算出g-C3N4和ag-C3N4的价带位置分别为1.55V和2.12V。和g-C3N4相比，ag-C3N4价带位置的正向移动理论上反映出其光催化氧化能力更强。通过分析它和g-C3N4的瞬时光电流响应强度和EIS数值结果得出ag-C3N4的光电化学性能更为优异。此外，研究了g-C3N4 和ag-C3N4光催化降解IBU效能，并探究了PDS协同这两种催化剂后复合体系对IBU的光催化降解效能，实验结果表明ag-C3N4光催化降解IBU的效果强于g-C3N4，同时在协同PDS后，PDS被催化剂表面的光生电子活化后产生硫酸根自由基，进一步提高复合体系对IBU的降解能力。 （2）利用化学还原法成功地将纳米Ag颗粒负载到载体表面，制备出复合光催化剂Ag/ag-C3N4。通过SEM、TEM、XRD、FT-IR、XPS和BET对ag-C3N4和Ag/ag-C3N4的测试结果说明ag-C3N4表面上成功负载了粒径范围在10~30nm的Ag颗粒，并且纳米Ag颗粒的负载没有改变ag-C3N4的表规则致密的层状结构，晶型、化学键和化学结构、化学态和化学组分以及比表面积。UV-vis、PL光谱、瞬时光电流响应测试、EIS测试和Mott-Schottky曲线的结果表明，Ag/ag-C3N4对于可见光有更强的吸收能力，更低的光生电子-空穴分离率、更低的阻抗值和更正的价带位置，这些能力的增强表明Ag/ag-C3N4具有ag-C3N4更强的光催化活性。此外，本文研究了PDS和Ag/ag-C3N4的协同作用，结果证明PDS的引入高效协同了Ag/ag-C3N4，提高了Ag/ag-C3N4对IBU的去除率、矿化率和反应速率。此外，探究了不同Ag含量的改变对Ag/ag-C3N4光催化性能的影响，确定了最佳Ag含量为10%。本文研究了Ag/ag-C3N4和PDS投加量、IBU浓度、不同pH值和不同无机离子对Ag/ag-C3N4协同PDS体系的影响，确定了该体系的最佳运行参数（Ag/ag-C3N4的投加量为1.5g/L，PDS投加量为0.5g/L，IBU浓度为20mg/L）。通过EPR实验和自由基淬灭实验确定了体系内硫酸根自由基（〖"SO" 〗_"4" ^"?-" ）和羟基自由基（?OH）的存在，并发现氧化降解作用贡献更大的是〖"SO" 〗_"4" ^"?-" 。Ag/ag-C3N4+PDS体系反应机制分析了纳米Ag颗粒的表面等离子共振效应和对光生电子捕获的作用可以增强Ag/ag-C3N4对于LED光的利用率、光生电子和空穴的产生量，抑制光生载流子的复合，从而提高光催化复合体系的氧化降解能力。

Nowadays, the pollution of human daily used pharmaceuticals and personal care products (PPCPs) has seriously affected the balance of the entire ecosystem and the health of the organism. Therefore, the development of such pollutants degradation technology has become a highly concerned topic. Among them, the photocatalytic oxidation technology with fast reaction speed and mineralization effect, coupled with PDS to form photocatalytic oxidation+PDS composite system, which has the ability of efficient degradation of PPCPs. Ibuprofen ( IBU) that has high detection rate and dangers in PPCPs was selected as target pollutant in the article. The semiconductor photocatalyst Ag/ag-C3N4 and PDS will form a composite photocatalytic system to explore the IBU degradation performance of this composite system. The main research content and conclusions are as follows. (1) Melamine is modified by concentrated hydrochloric acid, and generated acidified graphite phase carbon nitride (ag-C3N4) in muffle furnace under high temperature calcination. The results of comparative study of g-C3N4 and ag-C3N4 using SEM, TEM, XRD, FT-IR and XPS characterization indicated ag-C3N4 has a more regular dense layered structure, and g-C3N4 and ag-C3N4 have similar crystal forms, chemical bonds and chemical structures, chemical states and components. The BET test data of these two catalysts demonstrated that the hydrochloric acid modification method makes the specific surface area of g-C3N4 increase nearly 3 times. UV-vis spectra and PL spectra showed that ag-C3N4 has slightly higher light absorption intensity and photo-carrier separation efficiency. UV-vis, fluorescence (PL), and Mott-Schottky test results demonstrated that ag-C3N4 has slightly higher visible light absorbance and photocarrier separation rate than g-C3N4, and calculated the valance band position of ag-C3N4 and g-C3N4 are 1.55V and 2.12V. Compared with g-C3N4, the more positive valance band position of ag-C3N4 reflects its photocatalytic oxidation ability is stronger. The comparison of photocurrent and EIS results for the two samples determinied hydrochloride-modified method helps to improve the optical properties of g-C3N4. In addition, the photocatalytic IBU degradation of g-C3N4 and ag-C3N4 and the complex system of PDS and these two catalysts are studied. The experimental results show that the photocatalytic IBU degradation abilitiy of ag-C3N4 is stronger than that of g-C3N4. After synergistic PDS, PDS is activated by the catalyst to generate sulfate radicals, which further improves the IBU degradation ability of the composite system. (2) The nano Ag particles are successfully loaded onto the support surface of sample to form composite photocatalyst Ag/a g-C3N4 by chemical reduction. The test results of ag-C3N4 and Ag/ag-C3N4 by SEM, TEM, XRD, FT-IR, XPS, and BET showed that Ag particles on the ag-C3N4 surface are successfully loaded with Ag particles with a size range of 10-30 nm. The loading of nano-Ag particles did not change the ag-C3N4 form of the regular dense layered structure, crystal form, chemical bonds and chemical structure, chemical state and chemical composition and specific surface area. The results of UV-vis, PL spectra, photocurrent tests, EIS and Mott-Schottky curves indicated Ag/ag-C3N4 has stronger absorption of visible light, higher photo-carrier separation efficiency, lower electrochemical impedance and lower valence band position.It means that the photocatalytic activity of Ag/ag-C3N4 is much stronger than that of ag-C3N4. In addition, this arctile studied the synergistic effect of PDS on Ag/ag-C3N4. The results indicated that PDS increased the IBU removal rate, mineralization rate, and reaction rate of Ag/ag-C3N4. In addition, this arctile explored the Ag concent influence on the photocatalytic properties of Ag/ag-C3N4. This paper studied the effect of Ag/ag-C3N4 and PDS dosage, IBU concentration, different pH value and different inorganic ions on Ag-C3N4 synergistic PDS system. The optimum operating parameters of the system were determined (Ag/ag-C3N4 was 1.5 g/L, PDS was 0.5 g/L, and IBU was 20mg/L). EPR experiments and radical quenching experiments determined the presence of sulfate radicals (〖"SO" 〗_"4" ^"?-" ) and hydroxyl radicals (?OH) in the system, and found that 〖"SO" 〗_"4" ^"?-" contribute more to oxidative degradation. In addition, the reaction mechanism of Ag/ag-C3N4+PDS composite photocatalytic system proved that the effects of plasma resonance and photoelectrons capture on nano Ag particles. It can enhance the LED light utilization and the generation of photo-generated electrons and holes on Ag/ag-C3N4, and suppress recombination of photogenerated carriers, which efficiently improve the photocatalytic oxidative degradation performance of Ag/ag-C3N4+PDS system.