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Experimental and numerical investigation of effects of particle shape and size distribution on particles’ dispersion in a coaxial jet flow

d isPermaLink="false">https://www.sciencedirect.com/science/article/pii/S0921883118302723Titanium glycolate-derived TiO2 nanomaterials: Synthesis and applications

Publication date: Available online 21 June 2018

Source: Advanced Powder Technology

Author(s): Yi Wei, Jiaxin Zhu, Yixin Gan, Gang Cheng

Abstract

Titanium oxide (TiO2) is one of the most widely studied materials due to its fascinating properties and versatile applications in environmental and energy fields ranging from photocatalysis to solar cells and lithium ion batteries. The significance and variety of these applications have attracted great attention and spurred substantial progress in the synthesis and fundamental understanding of TiO2-based nanomaterials, nanocomposites, and nanoderivatives. This review summarizes the recent advances in the design and preparation of TiO2-based nanomaterials, nanocomposites, and nanoderivatives obtained from titanium glycolate precursor. Utilizing different fabrication strategies, titanium glycolate precursor with controllable morphology and size has been successfully produced, and it can be directly transformed into crystalline TiO2 nanomaterials through diverse post-treatments, including calcination thermal-decomposition, and refluxing, hydrothermal, and microwave treatment-assisted hydrolysis. Furthermore, doped TiO2, TiO2-composites, and other derivatives could be simply achieved by adding additional chemicals during transformation. The favorable properties of the resulting TiO2-based materials are also discussed, which are relevant to energy and environmental applications in the areas of dye-sensitized solar cells, lithium ion batteries, photocatalytic hydrogen evolution, photocatalytic CO2 reduction, photocatalytic degradation, and adsorption removal of pollutants.

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https://www.sciencedirect.com/science/article/pii/S0921883118302085https://www.sciencedirect.com/science/article/pii/S0921883118302085Structural and mechanical characterization of lithium-ion battery electrodes via DEM simulations

Publication date: Available online 19 May 2018

Source: Advanced Powder Technology

Author(s): Clara Sangrós Giménez, Benedikt Finke, Christine Nowak, Carsten Schilde, Arno Kwade

Abstract

Electrode structural stability and mechanical integrity is of major importance regarding not only lithium-ion battery performance but also safety aspects. The goal of this study is to design a simulation procedure to reproduce the microstructural and mechanical properties of such lithium-ion battery electrodes. Taking into consideration the particulate state of these electrodes, a discrete element method (DEM) approach is proposed, which comprises a procedure to reproduce real electrode structures and the application of a proper contact model to capture the bulk mechanics. This is accomplished by considering particle interactions as well as the performance of the binder. Three different electrodes are manufactured with the aim of calibrating and validating the Hertzian-bond contact model. Experimental nanoindentation measurements prove to be in good agreement with the simulation outcome, concluding that the method constitutes a valuable physical and mechanical basis for further applications.

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https://www.sciencedirect.com/science/article/pii/S0921883118302061https://www.sciencedirect.com/science/article/pii/S0921883118302061Preparation of plant derived carbon and its application for inclusion pigments

Publication date: Available online 22 April 2018

Source: Advanced Powder Technology

Author(s): Ting Chen, Xiaojun Zhang, Weihui Jiang, Jianmin Liu, Zhixiang Xie, Wan Jiang

Abstract

Plant derived carbon was utilized as a new financial and environmental friendly colorant in the synthesis of zircon encapsulated carbon pigment (C@ZrSiO4) via non-hydrolytic sol-gel method. After calcining, nature plants, i.e. sisal and bamboo leaves, were carbonized and occluded in ZrSiO4 matrix. The FT-IR and XRD results demonstrated that the plants were not affect the non-hydrolytic sol-gel polycondensation reaction, resulting in the pure ZrSiO4 formation. Both inclusion pigments presented deep black hue, i.e. L??=?34.93 and 33.02 for sisal and bamboo leaves, respectively, which was contributed to the homogeneous pore-size distribution and high carbon yield of the plants. These pigments have many distinguished advantages including low cost, high chromatic performance and excellent thermal stability, making them promising candidates for ceramic decoration.

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https://www.sciencedirect.com/science/article/pii/S0921883118301511https://www.sciencedirect.com/science/article/pii/S0921883118301511Facile and green synthesis of highly dispersed cobalt oxide (Co3O4) nano powder: Characterization and screening of its eco-toxicity

Publication date: Available online 14 March 2018

Source: Advanced Powder Technology

Author(s): Shikha Dubey, Jay Kumar, Ashok Kumar, Yogesh Chandra Sharma

Abstract

A novel green synthesis of cobalt oxide (Co3O4) nanoparticles using latex of Calotropis procera via simple precipitation method at room temperature was investigated. An extensive characterization of the product was carried out using X-ray diffractometry (XRD), Differential scanning calorimetry (DSC), Transmission electron microscopy (TEM), Energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) and UV–Visible spectroscopy. The results of the characterization confirmed that the synthesized nanomaterial is highly dispersed. TEM analysis revealed that the nano particles are having an average size around 10?nm. The eco-toxic investigation suggested that the particles are non-toxic and safe towards the environment. This green strategy proves to be an effective, fast, simple and cost-effective approach for the synthesis of Co3O4 nanoparticles for various applications.

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https://www.sciencedirect.com/science/article/pii/S0921883118300852https://www.sciencedirect.com/science/article/pii/S0921883118300852

» Author: Yi Wei, Jiaxin Zhu, Yixin Gan, Gang ChengAbstractTitanium oxide (TiO2) is one of the most widely studied materials due to its fascinating properties and versatile applications in environmental and energy fields ranging from photocatalysis to solar cells

» Reference: Advanced Powder TechnologyAuthor(s): Yi Wei, Jiaxin Zhu, Yixin Gan, Gang ChengAbstractTitanium oxide (TiO2) is one of the most widely studied materials due to its fascinating properties and versatile applications in environmental and energy fields rangin

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° [310187].