Mesoporous materials as gas sensors

Abstract

Ordered mesoporous materials have great potential in the field of gas sensing. Today various template-assisted synthesis methods facilitate the preparation of silica (SiO2) as well as numerous metal oxides with well-defined, uniform and regular pore systems. The unique nanostructural properties of such materials are particularly useful for their application as active layers in gas sensors based on various operating principles, such as capacitive, resistive, or optical sensing. This review summarizes the basic aspects of materials synthesis, discusses some structural properties relevant in gas sensing, and gives an overview of the literature on ordered mesoporous gas sensors.

Highly ordered Nanomaterial Functionalized Copper Schiff Base Framework: Synthesis, Characterization, and Hydrogen Peroxide Decomposition Performance

“…They exhibit highly-ordered porous and size-controlled structures, large specific surface areas, and they also present major accessibility and potential to be functionalized with different functional chemical groups on their surface [5][6][7][8][9][10][11]. Due to their remarkable properties, these catalysts have found a significant variety of applications in catalysis, e.g., gas adsorption [12][13][14][15][16], energy conversion [17,18], organo-optoelectronics [19][20][21][22], energy storage [23,24], gas sensors [25,26], and drug delivery [27][28][29]. A common and very effective procedure for the synthesis of PMOs relates to the co-condensation of silica with precursors such as tetraalkoxysilane and trialkoxyorganosilane in the presence of a structure-directing agent (templating agent), which determines the structure features of the resulting materials.…”

Surface‐Casting Synthesis of Mesoporous Zirconia with a CMK‐5‐Like Structure and High Surface Area

“…[1][2][3][4][5][6][7][8] Organic-inorganic assembly processes,using surfactants [9] or block co-polymers as soft templates,a re one feasible pathway for the creation of ordered mesoporous metal oxides. [10][11][12][13][14][15][16] Nanocasting from ordered mesoporous silica or carbon as hard template [17] is an alternative,i fs oft templating fails or only yields ill-crystallized materials.H owever,e specially the conditions for removal of the template from the pore system are problematic,s ince many oxides are reducible and/or thermally not stable,w hich can lead to collapse of the mesostructure.I n addition, without special steps the atomic scale structure stays amorphous or is only ill crystallized.…”

Influence of Mn Doping on the Sensing Properties of SnO<sub>2</sub> Nanobelt to Ethanol

“…As shown as the results, Mn ions can promote the crystallinity of SnO 2 NBs. Besides, Mn doping can produce more oxygen vacancies and reduces the barrier height of the material [32]. …”