Fabrication of MIL-Fe (53)/modified g-C3N4 photocatalyst synergy H2O2 for degradation of tetracycline
Fabrication of MIL-Fe (53)/modified g-C3N4 photocatalyst synergy H2O2 for degradation of tetracycline
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DOI：
10.1016/j.seppur.2021.119661
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发表时间：
2021-12
影响因子：
8.6
通讯作者：
Y. Pan;Xinyao Hu;Mutai Bao;Fengshu Li;Yiming Li;Jinren Lu
中科院分区：
文献类型：
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作者：
Y. Pan;Xinyao Hu;Mutai Bao;Fengshu Li;Yiming Li;Jinren Lu
采用等质量的三聚氰胺和三聚氰尿酸煅烧法制备了一种改进的多孔g- c3n4材料。将改进后的g- c3n4记录为CM，在CM上加载适量的MIL-Fe(53)，用自组装法合成Fe-MOF/CM（记为x% Fe-MOF/CM，其中x为给定量CM的MIL-Fe（53）的质量）。光催化降解实验表明，3% Fe-MOF/ cm - h2o2体系可以在60 min内降解100%的四环素（10 ppm）。该体系对四环素的降解效率约为纯g-C3N4的3.6倍。更重要的是，3% Fe-MOF/ cm - h2o2光催化剂体系对高浓度TC （30 ppm）仍有良好的降解效果，在60 min内可达到100%左右。该体系对TC的降解效率高于g- c3n4和CM，特别是在TC浓度较高的条件下。其原因可以归结为Fe-MOF的加入增强了材料的吸附性能。Fe3+和h2o2形成了Fenton-like体系，使得e +和h+能够快速分离。最后，通过GC-MS鉴定的中间体，提出了可能的降解途径。光催化机理为废水中TC的降解提供了一些建议。
An improved porous g-C3N4material was prepared by calcination with equal quality of melamine and cyanuric acid. The improved g-C3N4was recorded as CM and an appropriate amount of MIL-Fe (53) was loaded on the CM to synthesize Fe-MOF/CM (denoted as x% Fe-MOF/CM, which x was the mass of MIL-Fe (53) for a given amount of CM) by self-assembly synthesis method. Photocatalytic degradation experiments showed that the 3 % Fe-MOF/CM-H2O2system can degrade 100 % tetracycline (10 ppm) within 60 min. The efficiency of this system to degrade tetracycline was about 3.6 times than that of pure g-C3N4. More importantly, the 3 % Fe-MOF/CM-H2O2photocatalyst system still has excellent degradation effect on high concentration of TC (30 ppm), which can reach about 100 % within 60 min. This system exhibited high degradation efficiency of TC than g-C3N4and CM, especially under the high concentration of TC condition. The reason could ascribe the addition of Fe-MOF enhanced the adsorption performance of the material. Moreover, Fe3+and H2O2formed a Fenton-like system, which enabled the rapid separation of e-and h+. Finally, the possible degradation pathway was suggested through the intermediates identified by GC–MS. The photocatalytic mechanism would provide some suggestions for degradation of TC in waste water.