期刊
APPLIED CATALYSIS A-GENERAL
卷 550, 期 -, 页码 206-213出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2017.11.012
关键词
ZnAl-LDH; PMo12; Nano-hybrids; Self-assembly; Dye wastewater
资金
- National Natural Science Foundation of China [51678511, 51308484]
- open fund of Key Laboratory of Mineralogy and Metallogeny in Chinese Academy of Sciences [KLMM20150104]
- Natural Science Foundation of Hunan Province [13JJ4049]
- Education Department Fund of Hunan Province [14C1094]
- Major Talent Training Program of Xiangtan University [16PYZ09]
- Xiangtan University [12QDZ18]
- National Science Foundation [CMMI-1562907]
- ACS Petroleum Research Fund [57580-ND5]
- USDA National Institute of Food and Agriculture, HSI Collaboration: Integrating Food Science/Engineering and Education Network (IFSEEN) [2015-38422-24059]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1562907] Funding Source: National Science Foundation
ZnAl-layered double hydrcodde/H3PMo12O40 (ZnAl-LDH/PMo12) nano-hybrids were prepared by self-assembly between positively charged LDH nano-sheets and negatively charged PMo12 nano-clusters. The catalytic performance of ZnAl-LDH/PMo12 (ZAM) nano-hybrids on methyl orange (MO) degradation under room temperature and ambient pressure was investigated. The self-assembly process was evidenced by various characterization results, including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N-2 adsorption measurements, and X-ray photoelectron spectroscopy, which also suggested that the structure and morphology of the ZnAl-LDH/PMo12 hybrids played a critical role in their catalytic performance. The ZAM nano hybrid with a 1:1.59 M ratio of ZnAl-LDH to PMo12 exhibited an excellent catalytic activity for MO degradation, with a 74.2% discoloration rate and a 66.2% total organic carbon (TOC) removal efficiency. After five cycles of reactions, the discoloration rate remained at 62.5%. This high catalytic activity might be attributed to the formation of O-2(center dot-), which was generated from the reduction of the dissolved oxygen by PMo12. Overall, the results show that the formation of novel nano-hybrid catalysts through self-assembly of LDH nano-sheets with PMo12 nano-clusters leads to a significant improvement in the catalytic activity and stability of Mo based catalysts under room temperature and ambient pressure.
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