The cover photo describing the crystal structure of Na5YSi4O12 with glass-ceramic Na+ superionic conductors. As discussed by Toshinori Okura, these glass-ceramic conductors have great potential and are one of the most important groups of solid electrolytes, not only because of its practical usefulness for advanced batteries but also for its three-dimensional ionic conducting nature.
Development of anti-bio deteriorate sustainable geopolymer by SiO2 NPs decorated ZnO NRs
Manas Sarkar1*, Moumita Maiti2, Muhammad Akbar Malik1, Shilang Xu1*
1Institute of Advanced Engineering Structures and Materials, College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
2College of Biosystems Engineering and Food Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
Adv. Mater. Lett., 2019, 10 (2), pp 128-131
DOI: 10.5185/amlett.2019.2166
Publication Date (Web): Dec 19, 2018
Copyright © 2019 VBRI Press
E-mail: manas.physju@gmail.com, slxu@zju.edu.cn
In concrete industry, geopolymer acts as an alternative building material of ordinary cement and possess similar/greater mechanical strength and durability, fashioned by industrial by-product; fly ash with alkaline activator. Accompanied by the chemical corrosion, biogenic corrosion is a foremost obstruction in sewer systems, bridge piers, pipelines and offshore platforms. The present works has been given an effort to introduce an anti-bio deteriorate sustainable geopolymer (GMZnO–Si) through the decoration of spherical nano silica (Si) on zinc oxide Nano-rods (ZnO NRs) surface. XRD, Zeta potential, FESEM, EDS and XPS were hired for the characterization of ZnO-SiO2 nanohybrid system and applicability of GMZnO–Si mortar was investigated against microbial species (E. coli, S. aureus, A. niger). MIC/MBC/MFC values, agar plating, Inner permeability assay and ROS generation results exhibited excellent mechanistic approaches, by showing its ability to resist the biogenic degradation. The mechanical and durability activities of the GMZnO–Si are found considerably higher in respect to conventional control samples. The experimental outcomes propose a promising way to inclusion of ZnO-SiO2 modified geopolymer for biodeterioration-resistant structure with significant mechanical properties in near future.
ZnO-SiO2 nanohybrid, geopolymer, anti-microbial activity, durability, mechanical properties.
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