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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Preparation and characterization of calcium carbonate-titanium dioxide core-shell (CaCO3@TiO2) nanoparticles and application in the papermaking industry
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Preparation and characterization of calcium carbonate-titanium dioxide core-shell (CaCO3@TiO2) nanoparticles and application in the papermaking industry

机译：碳酸钙-二氧化钛核壳（CaCO3 @ TiO2）纳米粒子的制备，表征及在造纸工业中的应用

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摘要

A novel and convenient method for preparing TiO2-coated CaCO3 composite particles was proposed and authenticated, meanwhile, the reaction mechanism was discussed. In this paper, carbonization was selected to prepare calcium carbonate, titanium sulfate was the titanium source, as it had a relatively low price compared to organic titanium sources, and urea was the precipitant to synthesize the target product with the direct precipitation method. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis results proved that CaCO3 was covered by TiO2 particles. As verified by Field Emission Scanning Electron Microscopy (FESEM), a film of TiO2 had coated the surface of the CaCO3 core. The average nanoparticle size of the composite was found to be about 250 nm and well-dispersed. UV-visible absorption spectra in the solid phase study results showed that CaCO3@TiO2 possessed high ultraviolet absorption capacity. The whiteness of the CaCO3@TiO2 filler-containing paper sheet was 73.8%, which is similar to TiO2-incorporated paper (73.16%), and higher by about 3% than pure fiber paper (70.35%). (C) 2015 Elsevier B.V. All rights reserved.
机译：提出并验证了制备TiO2包覆的CaCO3复合粒子的简便方法，并探讨了其反应机理。本文选择碳化法制备碳酸钙，硫酸钛为钛源，因为与有机钛源相比价格较低，尿素为直接沉淀法合成目标产物的沉淀剂。 X射线衍射（XRD）和X射线光电子能谱（XPS）分析结果证明，CaCO3被TiO2颗粒覆盖。经场发射扫描电子显微镜（FESEM）验证，TiO2膜已覆盖CaCO3核的表面。发现复合物的平均纳米颗粒尺寸为约250nm并且分散良好。固相的紫外可见吸收光谱研究结果表明，CaCO3 @ TiO2具有较高的紫外吸收能力。含CaCO3 @ TiO2填料的纸张的白度为73.8％，与掺有TiO2的纸张（73.16％）相似，比纯纤维纸（70.35％）高约3％。 （C）2015 Elsevier B.V.保留所有权利。

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