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La1-xCexMnO3/attapulgite nanocomposites as catalysts for NO reduction with NH3 at low temperature

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Particuology 2016年第3期14卷 66-72页

作者： Xiazhang Li YU Yin Chao Yao Shixiang Zuo Xiaowang Lu Shiping Luo Chaoying Ni fiangsu Key Laboratory of Advanced Catalytic Materials and technology School of Petrochemical Engineering Changzhou University Changzhou 213164 China r&d center of xuyi attapulgite applied technology Chinese Academy of Sciences Xuyi 211700 China W. M. Keck centerforAdvanced Microscopy and Microanalysis University of Delaware Newark DE 19716 USA

A series of attapulgite （ATP） supported perovskite-type La1-xCexMnO3 ix=0-0.2） nanocomposites were prepared by a sol-gel method. The samples were characterized by X-ray diffraction, transmission elec- tron microscopy, Fourier-transform infrared spectroscopy, H2 temperature-programmed reduction, and temperature-programmed desorption of NH3. Their selective catalytic reduction of NO with NH3 was evaluated in the low-temperature range. The impact of the doping fraction of Ce4＋ on the NO conversion was investigated. The results indicated that the La1-xCexMnO3 nanoparticles with a size of ca. 15 nm were uniformly immobilized on the surface of ATP with a loading amount of 20wt%. The highest conversion rate of NO reached 98.6% when the doping fraction x was O.1, while the ATP support supplied a high surface areas facilitating the nanoparticles dispersion as well as the gas adsorption. Incorporation of an appropriate amount of Ce4＋ in the La3＋ site resulted in a high degree of reduction by the active perovskite species with enhanced catalytic activity.

关键词： attapulgite rare earth perovskite Nanocomposite Selective catalytic reduction NO conversion

Preparation and Electrorheological response of PAL/TiO_(2)/PANI Nanorods

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Journal of renewable Materials 2021年第10期9卷 1707-1715页

作者： Ling Wang Chenchen Huang Ping Zhang Fenghua Liu Ting Zou Zhixiang Li Jianfei Zhang Gaojie Xu Ningbo Institute of Materials technology and Engineering Chinese Academy of ScienceNingbo315201China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000China xuyi County attapulgite Application technology r&d and Achievement Transformation center Xuyi211700China

Using palygorskite(PAL)as template,the PAL/TiO_(2)/PANI nano-rods were synthesized by heterogeneous precipitation and in-situ *** synthesized PAL/TiO_(2)/PANI nanorods were used as a novel electrorheological(Er)fluid by mixing with silicone oil,which showed excellent Er *** yield stress of the PAL/TiO_(2)/PANI based Er fluid(15 vol%)reached 8.8 kPa under 4 kV mm^(−1) electric *** dynamic shear stress of the PAL/TiO_(2)/PANI based Er fluid could maintain a stable level in the shear rate range of 0.1–100 s^(−1).Furthermore,the PAL/TiO_(2)/PANI Er fluid exhibited excellent suspension stability.

关键词： Electrorheological palygorkite titanium oxide polyaniline nanorod

Ammonium sulfide-assisted hydrothermal activation of palygorskite for enhanced adsorption of methyl violet

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Journal of Environmental Sciences 2016年第3期28卷 33-43页

作者： Guangyan Tian Wenbo Wang Yuru Kang Aiqin Wang center for Eco-material and Green Chemistry Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of the Chinese Academy of Sciences Beijing 100049China r&d center of xuyi Palygorskite applied technology Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesXuyi 211700China

Herein,palygorskite（PAL）was activated via a simple hydrothermal process in the presence of ammonium sulfide,and the effects of activation on the microstructure,physico-chemical feature and adsorption behaviors of PAL were intensively *** hydrothermal process evidently improved the dispersion of PAL crystal bundles,increased surface negative charges and built more active –Si–O-groups served as the new＂adsorption sites＂.The adsorption property of the activated PAL for Methyl Violet（MV）was systematically investigated by optimizing the adsorption variables,including p H,ionic strength,contact time and initial MV *** activated PAL exhibited a superior adsorption capability to the raw PAL for the removal of MV（from 156.05 to 218.11 mg/g）.The kinetics for MV adsorption followed pseudo second-order kinetic models,while the isotherm and thermodynamics results showed that the adsorption pattern well followed the Langmuir *** structure analysis of PAL before and after adsorption demonstrated that electrostatic interaction and chemical association of –X–O-are the prominent driving forces for the adsorption process.

关键词： Palygorskite Hydrothermal Adsorption Methyl violet

From waste hot-pot oil as carbon precursor to development of recyclable attapulgite/carbon composites for wastewater treatment

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Journal of Environmental Sciences 2019年第1期31卷 346-358页

作者： Jie Tang Bin Mu Li Zong Aiqin Wang Key Laboratory of Clay Mineral applied research of Gansu Province Center of Eco-material and Green Chemistry Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences center of xuyi Palygorskite applied technology Lanzhou Institute of Chemical Physics Chinese Academy of Sciences

The utilization of waste products as valuable materials was a technical imperative for waste management. In this study, the cost-effective attapulgite/carbon(APT/C) composite was developed for wastewater treatment using waste hot-pot oil as a carbon precursor through a facile one-step calcination process. The APT/C composite prepared at 300°C exhibited the excellent adsorption capacity and rapid equilibrium rate over a broad p H range for the removal of various pollutants. More importantly, the removal ratios of the composites toward Methyl Violet and tetracycline still remained 77.6% and 60.2% of the initial adsorption capacity after ten adsorption–regeneration cycles via a facile thermal regeneration strategy, *** all doubt, this research provided a feasible and economical way for the sustainable utilization of waste hot-pot oil in wastewater treatment, achieving the concept of disposal waste with waste and recycling.

关键词： Waste hot-pot oil Calcination attapulgite/carbon composites Adsorption Thermal regeneration

Thermal Oxidative degradation and Ageing Performance of Silicone rubber Filled with attapulgite

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Chinese Journal of Chemical Physics 2021年第3期34卷 309-322,I0048页

作者： Hua-hua Zhao Huan-ling Song Xin-yao Tao Ge-xin Chen Ai-qin Wang Ling-jun Chou State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou lnstitute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Zhejiang Neoglory Jewelry Co. LtdYiwu 322013China Yiwu r&d center for functional materials of LICP Chinese Academy of SciencesYiwu 322000China Key Laboratory of Clay Mineral applied research of Gansu Province Center of Eco-materials and Green ChemistryLanzhou lnstitute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China

The natural attapulgite(NAPT)was disaggregated by high-pressure homogenization technology combined with extrusion process to prepare the attapulgite with disaggregated rod crystal bundles(dAPT)and large specific surface area of 133.7 m^(2)/*** and dAPT were incorporated into the silicone rubber to obtain the composite NAPTSr and dAPT-Sr by mechanical blending method,*** thermal oxidative ageing at 300℃ for 0.5 h,temperature for the 5%weight loss increased greatly from 385℃ of the neat silicone rubber to 396-399℃ with addition of NAPT and *** and dAPT enhanced the interaction between the filler nanoparticles and rubber matrix thus inhibited the nanoparticle *** conservation rate of the side methyl group in NAPT-Sr and dAPT-Sr was greatly improved after ***,the thermal oxidative degradation and ageing performance of the silicone rubber composites was significantly ***,dAPT could greatly restrain the growth of nanoparticles after ***,dAPT-Sr showed the better retention of tensile strength(40.6%),elongation at break(34.9%)and tear strength(30.1%)compared with the corresponding mechanical properties of the neat silicone rubber(10.6%,7.4%,and 5.0%)after ageing.

关键词： Silicone rubber attapulgite Composites Thermal oxidative degradation Ageing