In this study, a core-shell design of Fe₃O₄@SnO₂ was prepared, doped with silver nanoparticles (Fe₃O₄@SnO₂/Ag) and later laden into three-dimensional graphene oxide hydrogel (rGH) forming 10% rGH-Fe₃O₄@SnO₂/Ag, which was synthesized using chemical reduction methods and utilized in the degradation of 2,4 dichlorophenol as a target pollutant in the solution. Fourier Transform Infrared Spectroscopy/FTIR spectra, Raman spectroscopy, Brunauer-Emmett-Teller, X-ray photoelectron spectroscopy, X-ray diffraction, Photoluminescence spectra, Field Emission Scanning Electron Microscopy and Transmission Electron Microscopy were some of the standardized characterization techniques utilized. 2,4 dichlorophenol (2,4-DCP) was quickly adsorbed by three-dimensional 10% rGH-Fe₃O₄@SnO₂/Ag composite and rapidly degraded by Fe₃O₄@SnO₂/Ag nanoparticles under sunlight irradiation, indicating that superb synergies between adsorption-photocatalysis degradation could significantly improve the pollutant degradation performance. The maximum adsorption capacity of 10% rGH-Fe₃O₄@SnO₂/Ag was 14.90 mg/g after 30 min. According to the results, the percent degradation efficiency of 2,4-DCP in Fe₃O₄@SnO₂/Ag-rGH was not only high i.e. 93.8% via the synergy amongst adsorption-photocatalytic degradation, but also the percent degradation efficiency of 2,4-DCP was 85% after 5 repetitive cycles, which signified a high synergistic effect between Fe₃O₄@SnO₂/Ag nanoparticles and 3D graphene. A corresponding pathway for 2,4-DCP photodegradation was suggested, such as 2,4 -dichlorophenol, formic, acetic, or oxalic acid as the main intermediate compounds. The experimental results of radical species trapping showed the photo-generated holes exhibiting an important role in promoting both direct oxidation of 2,4-DCP and production of ^·O₂ radicals. Therefore, 10% rGH-Fe₃O₄@SnO₂/Ag composite revealed that it has a photocatalyst with high degradation activity, facile recyclability and easy magnetic separation for its potential wide application in the water treatment.

在这项研究中，制备了Fe ₃ O ₄ @SnO ₂的核-壳设计，掺杂了银纳米颗粒（Fe ₃ O ₄ @SnO ₂ / Ag），然后装入三维石墨烯水凝胶（rGH）中，形成10 ％rGH-Fe ₃ O ₄ @SnO ₂/ Ag，它是使用化学还原方法合成的，并用于降解溶液中的目标污染物2,4二氯苯酚。傅立叶变换红外光谱/ FTIR光谱，拉曼光谱，Brunauer-Emmett-Teller，X射线光电子能谱，X射线衍射，光致发光光谱，场发射扫描电子显微镜和透射电子显微镜是一些使用的标准化表征技术。2,4-二氯苯酚（2,4-DCP）迅速被三维10％RGH-吸附的Fe ₃ ö ₄ @SnO ₂ /银复合物和用Fe迅速降解₃ ö ₄ @SnO ₂/ Ag纳米粒子在阳光照射下，表明吸附-光催化降解之间的极好的协同作用可以显着提高污染物的降解性能。30分钟后，10％rGH-Fe ₃ O ₄ @SnO ₂ / Ag的最大吸附容量为14.90 mg / g。根据结果​​，通过吸附-光催化降解之间的协同作用，Fe ₃ O ₄ @SnO ₂ / Ag-rGH中的2,4-DCP的百分降解效率不仅很高，即93.8％，而且还具有百分率的降解效率。 5个重复周期后，2,4-DCP为85％，这表明Fe ₃ O ₄ @SnO之间具有较高的协同作用。₂ / Ag纳米颗粒和3D石墨烯。提出了2,4-DCP光降解的相应途径，例如2,4-二氯苯酚，甲酸，乙酸或草酸为主要中间体化合物。自由基种的实验结果表明：诱捕的光产生的空穴显示出在促进2,4-DCP的直接氧化和生产中起重要作用^· ö _2组的基团。因此，10％rGH-Fe ₃ O ₄ @SnO ₂ / Ag复合材料表明，它具有降解活性高，回收利用方便，易于磁分离的光催化剂，具有潜在的广泛应用在水处理中的潜力。