Magnetic halloysite/Fe3O4/AuNPs nanocomposite as a recyclable efficient catalyst for hydrogenation of congo red and 4-nitrophenol | |
Dong WK (董文凯); Wang AQ (王爱勤); Kang YR (康玉茹); Wang WB (王文波) | |
刊名 | Current Environmental Engineering |
2018 | |
卷号 | 5期号:2页码:144-154 |
DOI | 10.2174/2212717804666171103110721 |
英文摘要 | Objective: A supermagnetic halloysite/Fe3O4/Au nanoparticles (HNT/Fe3O4/AuNPs) nanocomposite was fabricated by a facile non-covalent self-assembly approach and used as a recyclable catalyst for the hydrogenation of Congo Red (CR) and 4-nitrophenol (4-NP). Method: The AuNPs were successfully decorated onto the HNT/Fe3O4 carrier using natural polymer chitosan (CTS) as a “bridge”. The formation of the nanocomposite and the uniform distribution of AuNPs on the HNT/Fe3O4 carrier were confirmed by UV-vis, FTIR, XRD, TGA and TEM analyses. Due to the successful loading of small-size AuNPs, the resulting HNT/Fe3O4/AuNPs nanocomposite showed very good catalytic activity. At a low catalyst concentration (0.25-0.5 g/L), the nanocomposite can catalyze the rapid decoloration of the 25 mg/L CR solution within 4 min and rapid reduction of 4- nitrophenol (4-NP) into 4-aminophenol (4-AP) within 5 min through a catalytic hydrogenation reaction in the presence of sodium borohydride. Result: In the catalysis reaction process, the AuNPs acted as the “courier station” to promote the electron transfer and thus accelerated the reaction process. After reusing for 8 catalysis cycles, the catalytic activity of the nanocomposite still remained good. In addition, the nanocomposite showed the maximum magnetization rate of 33.6 emu/g, which made it easy to separate it from the solution by a magnet for recycling and reusing. Conclusion: In a word, the nanocomposite has potential to be used as a high-efficient catalyst for the decoloration of dye and conversion of 4-NP by a hydrogenation reaction. |
学科主题 | 材料科学 ; 无机非金属材料 ; 复合材料 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/24257] |
专题 | 兰州化学物理研究所_甘肃省黏土矿物应用重点实验室 |
通讯作者 | Wang AQ (王爱勤); Wang WB (王文波) |
作者单位 | 1.1Key Laboratory of Clay Mineral Applied Research of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China 2.R&D Center of Xuyi Palygorskite Applied Technology, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Xuyi 211700, P.R. China 3.2University of Chinese Academy of Sciences, Beijing 100049, P.R. China |
推荐引用方式 GB/T 7714 | Dong WK ,Wang AQ ,Kang YR ,et al. Magnetic halloysite/Fe3O4/AuNPs nanocomposite as a recyclable efficient catalyst for hydrogenation of congo red and 4-nitrophenol[J]. Current Environmental Engineering,2018,5(2):144-154. |
APA | Dong WK ,Wang AQ ,Kang YR ,&Wang WB .(2018).Magnetic halloysite/Fe3O4/AuNPs nanocomposite as a recyclable efficient catalyst for hydrogenation of congo red and 4-nitrophenol.Current Environmental Engineering,5(2),144-154. |
MLA | Dong WK ,et al."Magnetic halloysite/Fe3O4/AuNPs nanocomposite as a recyclable efficient catalyst for hydrogenation of congo red and 4-nitrophenol".Current Environmental Engineering 5.2(2018):144-154. |
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