通过探索以三醛基间苯三酚(TP)为前体,2,5-二氨基-1,4苯二硫酚二盐酸盐修饰合成共价有机框架(COFs),并应用于水体中镉的吸附研究。采用扫描电镜(SEM)、傅里叶红外光谱(FT-IR)、热重分析(TG)等手段对材料形貌进行表征。利用火焰原子吸收光谱仪(AAS)对吸附后溶液进行测定。结果表明:COFs材料对镉离子有良好的吸附效果,在低浓度下对镉吸附率为92.0%,镉浓度为150mg/L时达到最大吸附量。伪二级动力学曲线可更好地拟合吸附行为,吸附等温线同时符合Langmuir和Freundlich模型,最大理论吸附量为36.7mg/kg。制备的COFs材料对溶液中镉离子具有良好吸附性能。
By exploring the use of trialdehyde resorcinol (TP) as a precursor and 2,5 diamino-1,4 phenyldithiophenol dihydrochloride (C6H10Cl2N2S2) as a modifier,covalent COFs materials were synthesized and applied for the adsorption of cadmium ions in water.Scanning electron microscopy (SEM),Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TG) were used to characterize the morphology of the materials.The flame atomic absorption spectrometer (AAS) was used to measure the solution after adsorption.The results showed that COFs had a good adsorption effect for cadmium ions,and the adsorption rate was 92.0% at the low concentration of cadmium ions.When the cadmium concentration was 150mg/L,the COFs material had the maximum adsorption capacity.Pseudo-second-order kinetics model could fit the adsorption behavior better,the adsorption isotherm conformed to Langmuir and Freundlich models,and the maximum theoretical adsorption capacity was 36.7mg/g.The prepared COFs materials had a good adsorption performance for cadmium ions in solution.
[1] 刘小舟.二维及三维共价有机框架材料的设计合成与功能探究[D].长春:吉林大学,2019.
[2] Yaghi O M.Porous,crystalline,covalent organic frameworks[J].Science,2005,310(5751):1166-1170.
[3] Zhou J,Wang B.Emerging crystalline porous materials as a multifunctional platform for electrochemical energy storage[J].Chemical Society Reviews,2017,46(22):6927-6945.
[4] Alahakoon S B,Thompson C M,Occhialini G,et al.Design principles for covalent organic frameworks in energy storage applications[J].Chem SusChem,2017,10(10):2116-2129.
[5] Prasenjit D,Sanjay K M.A dual-functionalized,luminescent and highly crystalline covalent organic framework:molecular decoding strategies for VOCs and ultrafast TNP sensing[J].Journal of Materials Chemistry A,2018,6:16246-16256.
[6] El-kaderi H M,Hunt J R,Mendoza J L,et al.Designed synthesis of 3D covalent organic frameworks[J].Science,2007,316(5822):268-272.
[7] Sharath K,Kaushi K D,Rahu L B J.Covalent organic frameworks:chemistry beyond the structure[J].Journal of the American Chemical Society,2019,141(5):1807-1822.
[8] Li X L,Cui S L,Sun B,et al.Chemically robust covalent organic frameworks:progress and perspective[J].Matter,2020,3:1507-1540.
[9] Li J,Jing X C,Li Q Q,et al.Bulk COFs and COF hanosheets for electrochemical energy storage and conversion[J].Chemical Society Reviews,2020,49:3565-3604.
[10] Maria S L,Thomas B.Covalent organic frameworks:structures,synthesis,and applications[J].Advanced Functional Materials,2018,28:1705553.
[11] Wang Z F,Zhang S N,Chen Y,et al.Covalent organic frameworks for separation applications[J].Chemical Society Reviews,2020,49:708-735.
[12] Li Z E,He T,Gory Y F,et al.Covalent organic frameworks:pore design and interface engineering[J].Accounts of chemical Research,2020,53(8):1672-1685.
[13] Wen P,Lei Y Z,Li W Q,et al.Synergy between covalent organic frameworks and surfactants to promote water-based lubrication and corrosion resistance[J].ACS Applied Nano Materials,2020,3(2):1400-1411.
[14] 张安睿,艾玥洁.共价有机框架(COFs)材料的结构控制及其在环境化学中的应用[J].化学进展,2020,32(10):1564-158.
[15] Huang N,Zhai L,Xu H,et al.Stable covalent organic frameworks for exceptional mercury removal from aqueous solutions[J].Journal of the American Chemical Society,2017,139(6):2428-2434.
[16] Li G,Ye J,Fang Q,et al.Amide-based covalent organic frameworks materials for efficient and recyclable removal of heavy metal lead(Ⅱ)[J].Chemical engineering Journal,2019,370(15):822-830.
[17] Dinart M,Hatami M.N-riched crystalline covalent organic framework as a highly porous adsorbent for effective cadmium removal[J].Jourmal of Enviromental Chemical Engineering,2019,7(1):102907.
[18] Wang H P,Wang T,Ma R R,et al.Facile synthesis of sulfonated covalent organic framework for the adsorption of heavy metal ions[J].Journal of the Taiwan Institute of Chemical Engineers,2020,112:122-129.
[19] 中华人民共和国生态环境部.2019年中国环境生态环境状况公报[EB/OL].(2019-06-02)[2020-05-18].https://www.mee.gov.cn/hjzl/sthjzk/zghjzkgb/202006/P020200602509464172096.pdf
[20] 雷学铁,粟启仲,刘国强,等.防城港西湾及邻近海域水体重金属的季节性和年际变化特征[J].广西科学,2022,29(3):511-521.
[21] 苏东海,郭明璋,刘洋儿,等.基于合成生物学的功能微生物在重金属污染治理中的应用与展望[J].农业生物技术学报,2021,29(3):579-590.
[22] Makarova A,Pishchaeva K,Chelnokov V,et al.Evaluation of the effectiveness of the use of carbon fibres using salt of ethylenediaminetetraacetic acid for the purification of water bodies from heavy metals[J].Cleaner Engineering and Technology,2022,10:100549.
[23] 戴世明,吕锡武.镉污染的水处理技术研究进展[J].安全与环境工程,2006,13(3):63-65,71.
[24] WHO.Environmental health criteria[R].Geneva,Switzerland:World Health Organization,2003.
[25] FAO/WHO.Working document for information and use in discussions related to contaminants and toxins in the GSCTFF 2014[C].Geneva:Proceedings of eighth Session,2014.
[26] 杜瑜,尚琪.环境镉污染人群健康影响研究回顾[J].卫生研究,2016,35(2):241-243.
[27] 胡兰兰,饮用水重金属污染应急处理技术的研究[D].兰州:兰州交通大学,2013.
[28] 石长恩.弱碱性离子交换树脂去除饮用水中微量重金属离子及再生试验研究[D].重庆:重庆大学,2002.
[29] 何苗.污染重金属离子处理技术的研究进展[J].广州化工,2016,44(19):27-29.
[30] 梁渠,王继森,胡鸿颖.新型功能化泡沫塑料及其吸附重金属离子的特性研究[J].四川化工,1997(S4):14-16.
[31] 中科院专家研制出快速去除饮用水中重金属的新材料[J].化学分子计量,2017,26(5):107.
[32] Yang C X,Liu C,Cao Y M,et al.Facile room-temperature solution-phase synthesis of a spherical covalent organic framework for high-resolution chromatographic separation[J].Chemical Communications,2015,51(61):12254-12257.
基金资助
广西自然科学基金项目(2022GXNSFAA035470和2020GXNSFBA297138);广西中青年能力提升项目(2019KY0626);大学生创新创业项目(202210605009和S202210605044);河池学院项目(2021GCC021、2022XJZD003)
PDF
