A novel visible-light driven 3D porous network structure rGO-Ag@Ag₃PO₄ (RAA) hydrogel composite photocatalyst with a synergistic effect of adsorption enrichment and photocatalysis degradation has been synthesized by a facile method and characterized by XRD, SEM, TEM, EDS, FTIR, DRS, UV–vis, TG, Raman, and XPS. RAA hydrogel photocatalyst with 3D porous network structure is not only favorable to increasing the absorption property for organic pollutants owing to a larger surface area and π-π conjunction property, but also promotes the separation and transformation of electron-hole pairs due to the good conductivity performance. The RAA hydrogel composite photocatalyst has exhibited the excellent removal capacity of organic pollutants which were about 1.94 and 1.10 times higher than those of bare Ag₃PO₄ for the removal of MB and 2, 4-CDP in the dynamic system, respectively. The enhancement of removal efficiency was due to a synergistic effect of adsorption enrichment and photocatalysis degradation. The removal rate of RAA hydrogel composite photocatalyst has only a little decrease from 76.04% to 68.51% for 60 h of the photoreaction, showing the relatively good stability. The trapping experiment and ESR showed the main active species were holes.

一种新型的可见光驱动的3D多孔网络结构rGO-Ag @ Ag ₃ PO ₄（RAA）具有吸附富集和光催化降解协同作用的水凝胶复合光催化剂已通过一种简便的方法合成，并通过XRD，SEM，TEM，EDS，FTIR，DRS，UV-vis，TG，Raman和XPS进行了表征。具有3D多孔网络结构的RAA水凝胶光催化剂不仅具有较大的表面积和π-π结合性质，有利于提高有机污染物的吸收性能，而且由于导电性好，还可以促进电子-空穴对的分离和转化表现。RAA水凝胶复合光催化剂显示出优异的有机污染物去除能力，比裸露的Ag ₃ PO ₄分别高出约1.94和1.10倍用于分别删除动态系统中的MB和2、4-CDP。去除效率的提高归因于吸附富集和光催化降解的协同作用。在60 h的光反应中，RAA水凝胶复合光催化剂的去除率仅从76.04％降至68.51％，显示出相对较好的稳定性。诱捕实验和ESR表明主要的活性物质是空穴。