From spent dye-loaded palygorskite to a multifunctional palygorskite/carbon/Ag nanocomposite | |
Department | 环境材料与生态化学研究发展中心 |
Tian GY(田光燕)1,2; Wang WB(王文波)1,3; Zong L(宗莉)1,3; Kang YR(康玉茹)1,3; Wang AQ(王爱勤)1,3; Wang WB(王文波); Wang AQ(王爱勤) | |
2016 | |
Source Publication | RSC Advances |
ISSN | 2046-2069 |
Volume | 6Issue:48Pages:41696-41706 |
Abstract | Palygorskite (PAL) has been widely used for adsorption removal of dyes from wastewater, but the dye-loaded PAL is usually discharged as solid waste because it is hardly regeneratable by conventional elution processes. As the aim was to efficiently utilize the dye-loaded PAL waste, we employed a facile one-pot hydrothermal process to transform the spent methyl violet (MV)-loaded PAL into multifunctional ternary palygorskite/carbon/Ag nanoparticles (PAL/C/AgNPs) nanocomposites in the assistance of AgNO3. The MV-loaded PAL serves as a carbon precursor, reducer of Ag(I) and supporter of the in situ formed AgNPs. Structure characterizations confirmed that the MV dye was transformed into carbon species, and AgNPs were formed on the PAL with good dispersion, and the addition of Ag(I) ions promoted carbonization of the MV molecules. The as-prepared nanocomposites exhibited excellent adsorption and catalytic performance. Adsorption evaluation showed that the nanocomposite prepared at 5 mass% of AgNO3 dosage gives the best adsorption properties, and 99.2% of methylene blue (MB), 86.9% of MV, 68.7% of chlortetracycline hydrochloride (CTC) and 46.2% of tetracyclines (TC) were rapidly removed from 100 mg L−1 of the aqueous solution using 0.5 g L−1 of the adsorbent. The removal ratio increased with increasing dosage of adsorbent, and the minimum usage amounts of adsorbent for the thorough removal of MB, MV, CTC and TC molecules were 1.0 g L−1, 1.2 g L−1, 3.5 g L−1 and 4.5 g L−1, respectively. Moreover, the nanocomposites could rapidly catalyze the conversion of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) within 6.5 min with a catalytic rate constant of 0.0120 s−1, and the catalytic activity is still retained after 8 cycles of reuse. In addition, the nanocomposite can be re-generated into new adsorbents by the same hydrothermal process after adsorption of organic matters, which open a new sustainable avenue to efficiently utilize waste dye-loaded PAL and develop new adsorption and catalysis materials. |
Keyword | Dye-loaded Palygorskite Nanocomposite Catalysis Adsorption |
Subject Area | 功能复合材料 ; 材料学 |
DOI | 10.1039/c6ra03981b |
Funding Organization | National Natural Science Foundation of China (no. 51403221;21377135);“863” Project of the Ministry of Science and Technology, People's Republic of China (no. 2013AA032003);Jiangsu Provincial Joint Innovation and Research Funding of Enterprises, Colleges and Institutes (no. BY2015056-01);the National Science Foundation of Gansu province, P.R. China (no. 1308RJZA308) |
Indexed By | SCI |
If | 3.108 |
Language | 英语 |
Funding Project | 功能复合材料组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/19558 |
Collection | 环境材料与生态化学研究发展中心 |
Corresponding Author | Wang WB(王文波); Wang AQ(王爱勤) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomaterials & Green Chem, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, R&D Ctr Xuyi Palygorskite Appl Technol, Lanzhou Inst Chem Phys, Xuyi 211700, Peoples R China |
Recommended Citation GB/T 7714 | Tian GY,Wang WB,Zong L,et al. From spent dye-loaded palygorskite to a multifunctional palygorskite/carbon/Ag nanocomposite[J]. RSC Advances,2016,6(48):41696-41706. |
APA | Tian GY.,Wang WB.,Zong L.,Kang YR.,Wang AQ.,...&王爱勤.(2016).From spent dye-loaded palygorskite to a multifunctional palygorskite/carbon/Ag nanocomposite.RSC Advances,6(48),41696-41706. |
MLA | Tian GY,et al."From spent dye-loaded palygorskite to a multifunctional palygorskite/carbon/Ag nanocomposite".RSC Advances 6.48(2016):41696-41706. |
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