文献类型：期刊文献

英文题名：Carbon dots modified mesoporous organosilica as an adsorbent for the removal of 2,4-dichlorophenol and heavy metal ions

作者：Wang, Lingzhi[1,2,3];Cheng, Chen[1];Tapas, Sen[4];Lei, Juying[1];Matsuoka, Masaya[5];Zhang, Jinlong[1];Zhang, Fan[2,3]

机构：[1]E China Univ Sci & Technol, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Fudan Univ, State Key Lab Mol Engn Polymers, IChEm Collaborat Innovat Ctr Energy Mat, Dept Chem, Shanghai 200433, Peoples R China;[3]Fudan Univ, State Key Lab Mol Engn Polymers, IChEm Collaborat Innovat Ctr Energy Mat, Adv Mat Lab, Shanghai 200433, Peoples R China;[4]Univ Cent Lancashire, Sch Forens & Investigat Sci, Inst Nanotechnol & Bioengn, Ctr Mat Sci, Preston PR1 2HE, Lancs, England;[5]Osaka Prefecture Univ, Grad Sch Engn, Dept Appl Chem, Osaka 5998531, Japan

年份：2015

卷号：3

期号：25

起止页码：13357

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20152600974586);WOS:【SCI-EXPANDED(收录号:WOS:000356455200023)】；

基金：This work has been supported by the National Nature Science Foundation of China (U1407102, 21322508, 21210004, 21173077 and 21377038), the National Basic Research Program of China (973 Program, 2013CB632403, 2013CB934100, 2012CB224805), the Science and Technology Commission of Shanghai Municipality (14ZR1410700 and 14230710500), the Research Fund for the Doctoral Program of Higher Education (20120074130001), the Program for New Century Excellent Talents in University (NCET) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Adsorption - Lead compounds - Pore size - Organic pollutants - Copper compounds - Mesoporous materials - Silica - Carbon - Heavy metals - Mercury compounds

摘要：Periodic mesoporous organosilica embedded with carbon dots are adopted as the adsorbent for removal of the toxic organic pollutant 2,4-dichlorophenol and inorganic metal ions Hg(II), Cu(II), and Pb(II). The composite possesses an ordered 2D hexagonal mesostructure with a space group of p6mm, high specific surface area (similar to 468.46 m(2) g(-1)), and uniform pore size (similar to 5.50 nm). The surface is covered by about 1-2 layers of carbon dot nanoparticles. The maximum adsorption capacity for 2,4-dichlorophenol is 99.70 mg g(-1), and the distribution coefficient of metal ions between adsorbent and solution phases is in the range of 2.60-7.41, following the order of Hg(II) > Cu(II) > Pb(II). The Cu(II) and Pb(II) adsorption stays nearly fixed while Hg(II) adsorption is depressed by similar to 45% in a mixed solution of metal ions. The Cu(II) and Hg(II) adsorption shows unapparent variation but Pb(II) adsorption is improved by similar to 55% in a mixed solution of metal ion and 2,4-dichlorophenol. In contrast, all metal ions lead to the depression of 2,4-dichlorophenol adsorption by 37% (Pb(II)), 45% (Cu(II)), and 48% (Hg(II)). Finally, the n-pi electron donor-acceptor interaction between O- and N-containing groups in mesoporous organosilica and the benzene ring in 2,4-dichlorophenol is revealed to be responsible for the enhanced adsorption of 2,4-dichlorophenol, while the electrostatic force and complex formation between metal ions and amide groups co-contribute to the improvement of metal ions adsorption.