Controllable synthesis of prism- and lamella-like ZnO and their gas sensing

Preparation and characterization of ZnO tetrapods and octapods

“…ZnO as a wide band-gap (3.37 eV) semiconductor with large excition binding energy (60 meV) is particularly interesting in recent years [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Since the size and morphology of ZnO at the nanometer scale play a key role in tailoring its physical and chemical properties [1].…”

“…Since the size and morphology of ZnO at the nanometer scale play a key role in tailoring its physical and chemical properties [1]. So far, ZnO nanostructures with different sizes and morphologies have been synthesized, such as nanowires [2], nanorods [3,4], nanotubes [5], nanospring [6], nanocombs [7], nanonails [8], nanosheet [9], nanohelices [10] and nano-tetrapods. [11][12][13] Among these nanostructures, ZnO nano-tetrapods with a distinctive three-dimensional (3D) architecture have stimulated great interest, since they can be used as a methane-like building block to further fabricate functionalized materials with special properties.…”

Hierarchically Self‐Assembled Star‐Shaped ZnO Microparticles for Electrochemical Sensing of Amines

“…[21] Moreover,w ith its highly hierarchical structure and high porosity,S SZ should be expected to have av ery good ability to adsorb oxygen on its surfaces and to promotet he reaction between oxygen speciesa nd EDA molecules. [16] The calibrated current vs. EDA concentration (I-C curve)s hows that the current increases linearly as af unction of concentration in aw ide concentration range (see the Supporting Information, Figure S3);t his can be ascribed to the generation of ah igh charge density in the solutiona st he EDAc oncentration increases. [24] In conclusion, star-shaped zinc oxide (SSZ)m icroparticles with hierarchical nanostructures have been synthesized by af acile hydrothermals ynthetic method, and the materials have been demonstrated to serve as ap latform for electrochemicals ensing of EDA.…”

“…sensing, because it can be used to detect ar ange of gases and volatile organic compounds (VOCs), such as H 2 , [7] CO, [8] NO 2 , [9] HCHO, [10] alcohols, [11] aldehydes, [12] acetone, [13] aromatics, [14] and amines. [15,16] It has been shown that the sensing selectivitya nd sensitivity of ZnO for toxic gases and VOCs are strongly dependent on ZnO's structure and morphology. [12] Hence,r ecent researche fforts have focusedo nt he development of ZnO with controlled structure and morphology, for example, nanoparticles, [17] nanorods, [18] nanoflowers, [19] nanopencils, [15] and 2D nanogrids.…”

“…At present, methods for detectiono fo rganoamines include opticals ensing, [26] luminescence-based probes, [27] fluorescent probes, [28] and chemical sensing. [12,15,16] However,s ome of these detection methods are costly to employ,w hereas others have limitedd etection sensitivities.…”