Harbin Engineering University

About: Harbin Engineering University is a education organization based out in Harbin, Heilongjiang, China. It is known for research contribution in the topics: Control theory & Computer science. The organization has 31149 authors who have published 27940 publications receiving 276787 citations. The organization is also known as: HEU.

Porous iron molybdate nanorods: in situ diffusion synthesis and low-temperature H2S gas sensing.

Abstract: In the paper, we developed an in situ diffusion growth method to fabricate porous Fe2(MoO4)3 nanorods. The average diameter and the length of the porous nanorods were 200 nm and 1.2–4 μm, respectively. Moreover, many micropores existed along axial direction of the Fe2(MoO4)3 nanorods. In terms of nitrogen adsorption–desorption isotherms, calculated pore size was in the range of 4–115 nm, agreeing well with the transmission electron microscope observations. Because of the uniquely porous characteristics and catalytic ability at low temperatures, the porous Fe2(MoO4)3 nanorods exhibited very good H2S sensing properties, including high sensitivity at a low working temperature (80 °C), relatively fast response and recovery times, good selectivity, and long-term stability. Thus, the porous Fe2(MoO4)3 nanorods are very promising for the fabrication of high-performance H2S gas sensors. Furthermore, the strategy presented here could be expended as a general method to synthesize other hollow/porous-type transition...

Porous geopolymer composites: A review

Abstract: Porous geopolymers have emerged as one of the most promising inorganic porous materials over the last decade, due to their inexpensive and easy fabrication process, suitable properties, thermal and chemical stability, and extensive applications. To further improve or optimize the properties of porous geopolymers or to endow them with new functionalities, a significant effort has been devoted to the exploitation and application of porous geopolymer composite materials. This review article highlights the current state-of-the-art in the field of porous geopolymer composites manufacturing methods (direct foaming, embedding lightweight (porous) fillers, additive manufacturing, etc.), properties (mechanical properties, thermal properties, adsorption properties, and others), and applications. With the summary and analysis of previous research literature, this review aims to foster further investigations into developing innovative routes for the fabrication of porous geopolymer components with improved properties and to encourage the widespread technological application of these materials.