Department of Materials Science and Engineering , Korea Advanced Institute of Science and Technology , 291. Daehak-ro , Yuseong-gu, Daejeon 305-701 , Republic of Korea.
Advanced Nanosensor Research Center , KI Nanocentury, KAIST , 291 Daehak-ro , Yuseong-gu, Daejeon 34141 , Republic of Korea.
ACS Appl Mater Interfaces. 2019 Sep 18;11(37):34100-34108. doi: 10.1021/acsami.9b11124. Epub 2019 Sep 4.
Two-dimensional (2D) inorganic nanomaterials have attracted enormous interest in diverse research areas because of their intriguing physicochemical properties. However, reliable method for the synthesis and composition manipulation of polycrystalline inorganic nanosheets (NSs) are still considered grand challenges. Here, we report a robust synthetic route for producing various kinds of inorganic porous NSs with desired multiple components and precise compositional stoichiometry by employing tunicin, i.e., cellulose extracted from earth-abundant marine invertebrate shell waste. Cellulose fibrils can be tightly immobilized on graphene oxide (GO) NSs to form stable tunicin-loaded GO NSs, which are used as a sacrificial template for homogeneous adsorption of diverse metal precursors. After a subsequent pyrolysis process, 2D metallic or metal oxide NSs are formed without any structural collapse. The rationally designed tunicin-loaded GO NS templating route paves a new path for the simple preparation of multicompositional inorganic NSs for broad applications, including chemical sensing and electrocatalysis.
二维（2D）无机纳米材料由于其有趣的物理化学性质，在各个研究领域引起了极大的兴趣。然而，对于多晶无机纳米片（NSs）的合成和组成操纵，仍然被认为是一个重大的挑战。在这里，我们报告了一种通过使用贻贝类甲壳素（即从丰富的海洋无脊椎动物壳废物中提取的纤维素），制备具有所需多种成分和精确组成化学计量比的各种无机多孔 NSs 的稳健合成路线。纤维素原纤维可以紧密地固定在氧化石墨烯（GO）NS 上，形成稳定的负载贻贝类甲壳素的 GO NS，可作为均匀吸附各种金属前体的牺牲模板。在随后的热解过程中，形成了 2D 金属或金属氧化物 NS，而没有任何结构塌陷。这种合理设计的负载贻贝类甲壳素的 GO NS 模板路线为简单制备用于广泛应用的多组分无机 NS 开辟了新途径，包括化学传感和电催化。
