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首页> 外文期刊>Advanced Functional Materials >A General Synthesis of Crumpled Metal Oxide Nanosheets as Superior Chemiresistive Sensing Layers
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A General Synthesis of Crumpled Metal Oxide Nanosheets as Superior Chemiresistive Sensing Layers

机译：皱纹金属氧化物纳米片作为优良的化学传感层的一般合成

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摘要

Metal oxide nanosheets having high mesoporosity, grain size distribution of 5-10 nm, and ultrathin thickness have attracted much attention due to their intriguing properties such as high surface-to-volume ratio and superior chemical activities. However, 2D nanostructures tend to restack, inducing a decrease in accessible surface area and a number of pores. To solve this problem, herein, a unique synthetic method of crumpled metal oxide nanosheets using spray pyrolysis of metal ion-coated graphene oxide, followed by heat treatment, is reported. This method is applicable not only to single-component metal oxides but also to heterogeneous multicomponent metal oxides in which composition can be controlled. Crumpled SnO2, ZnO, and Co3O4 as well as SnO2/ZnO and SnO2/Co3O4 nanosheets with heterogeneous interfaces are successfully synthesized and used as superior gas sensing layers. Because of the abundant reaction sites, well-developed porosity for high gas accessibility, the formation of heterojunctions, the crumpled SnO2/ZnO and SnO2/Co3O4 nanosheets exhibit outstanding sensing performance (R-air/R-gas = 20.25 toward 5 ppm formaldehyde, and R-air/R-gas = 14.13 toward 5 ppm acetone, respectively). This study can contribute to the realization of a family of heterogeneous crumpled metal oxide nanosheets that can be applied to various research fields.
机译：具有高介孔率，5-10nm的粒径分布和超薄厚度的金属氧化物纳米片由于其引人入胜的特性（例如高的体积比和出色的化学活性）而备受关注。然而，二维纳米结构倾向于重新堆叠，导致可及表面积和许多孔的减少。为了解决该问题，在本文中，报道了使用金属离子涂覆的氧化石墨烯的喷雾热解，然后进行热处理的独特的皱纹金属氧化物纳米片的合成方法。该方法不仅适用于单组分金属氧化物，而且适用于可以控制组成的多相多组分金属氧化物。成功地合成了具有异质界面的皱缩的SnO2，ZnO和Co3O4以及SnO2 / ZnO和SnO2 / Co3O4纳米片，并将其用作优越的气体传感层。由于丰富的反应部位，发达的孔隙度和高的气体可及性，异质结的形成，皱缩的SnO2 / ZnO和SnO2 / Co3O4纳米片表现出出色的传感性能（R-空气/ R-气体= 20.25，对5 ppm甲醛，和R-air / R-gas分别为14.13（对5 ppm丙酮））。这项研究可有助于实现可应用于各种研究领域的异质皱褶金属氧化物纳米片家族。

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  • 来源
    《Advanced Functional Materials》 |2019年第31期|1903128.1-1903128.10|共10页
  • 作者

    Kim Rheehyun; Jang Ji-Soo; Kim Dong-Ha; Kang Joon-Young; Cho Hee-Jin; Jeong Yong Jin; Kim Il-Doo;

  • 作者单位

    Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, KI Nanocentury, Adv Nanosensor Res Ctr, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, KI Nanocentury, Adv Nanosensor Res Ctr, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, KI Nanocentury, Adv Nanosensor Res Ctr, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, KI Nanocentury, Adv Nanosensor Res Ctr, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, KI Nanocentury, Adv Nanosensor Res Ctr, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, KI Nanocentury, Adv Nanosensor Res Ctr, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, 291 Daehak Ro, Daejeon 305701, South Korea|Korea Adv Inst Sci & Technol, KI Nanocentury, Adv Nanosensor Res Ctr, Daejeon 34141, South Korea;

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  • 关键词

    crumpled; graphene oxide; heterojunction; SMO-based gas sensor; spray pyrolysis;

    机译：皱;氧化石墨烯;异质结;基于SMO的气体传感器;喷雾热解;

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