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Adsorption Performances of Naked and 3-Aminopropyl Triethoxysilane-Modified Mesoporous TiO2 Hollow Nanospheres for Cu2+, Cd2+, Pb2+, and Cr(VI) Ions

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Mesoporous hollow TiO2 nanospheres composed of anatase TiO2 nanoparticles were prepared by the sacrificial template method using methyl acrylic acid/styrene latex as the template. The mesoporous hollow TiO2 nanospheres were modified with 3-aminopropyl triethoxysilane (APTES) through the Ti-O-Si bonding. The adsorption of Cu2+, Cd2+, and Pb2+ ions on the naked and APTES-modified hollow TiO2 nanospheres followed the pseudo-second-order adsorption kinetics. According to the Langmuir adsorption isotherms, the maximum adsorption capacities of APTES-modified hollow TiO2 nanospheres for Cu2+, Cd2+, and Pb2+ ions were 12.7, 17.5, and 1.8 times those of naked hollow TiO2 nanospheres, respectively. When Cr(VI) was adsorbed on the surface of the APTES-modified hollow TiO2 nanosphere, the oxidation property of Cr(VI) decayed its adsorption.
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Keywords: Adsorption Isotherm; Adsorption Kinetics; Hollow TiO2 Nanosphere; Metallic Ions; Modification

Document Type: Research Article

Affiliations: Faculty of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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