Assembly with copper(ii) ions and D-π-A molecules on a graphene surface for ultra-fast acetic acid sensing at room temperature.
Assembly with copper(ii) ions and D-π-A molecules on a graphene surface for ultra-fast acetic acid sensing at room temperature.
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在石墨烯表面组装铜 (ii) 离子和 D-pi-A 分子，用于室温下超快速乙酸传感
DOI：
10.1039/c9ra05706d
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发表时间：
2019-09-23
期刊：
影响因子：
3.9
通讯作者：
Zhou, Guofu
中科院分区：
文献类型：
--
作者：
Gong, Yelei;Li, Hao;Pei, Wenle;Fan, Jincheng;Umar, Ahmad;Al-Assiri, M. S.;Wang, Yao;de Rooij, Nicolaas Frans;Zhou, Guofu
本研究通过石墨烯纳米片与4-羟基喹啉（4 HQ）和铜离子的超分子组装制备了石墨烯基复合材料4 HQ-rGO/Cu 2+。该超分子组装体在室温下对乙酸表现出优异的和增强的传感性能，这是由于D-π-A分子，即4 HQ，能够加速石墨烯纳米片和4 HQ分子之间的电荷转移。此外，在室温下，铜（II）离子也发挥了关键作用，作为气体吸附的主要活性位点，因此所制造的传感器表现出高响应，出色的选择性，和超快的响应/恢复时间。为了检查Cu 2+离子对于超分子组装体的选择性，将各种其他过渡金属离子如Mn 2+、Fe 3+、Co 2+、Ni 2+、Cu 2+和Cd 2+连接到4 HQ-rGO组装体，并测定它们的乙酸传感性能。有趣的是，与其他基于金属离子的4 HQ-rGO材料相比，具有Cu 2+离子的超分子组装体（4 HQ-rGO/Cu 2+）表现出最佳的传感性能。与文献报道的典型乙酸气敏元件相比，所制备的4 HQ-rGO/Cu 2+超分子组装体在室温下具有最短的气体响应时间（5 s以内）。本研究表明，所制备的超分子组装体是一个有前途的材料，作为室温乙酸气体传感器在实际应用中。所制备的4 HQ-rGO/Cu 2+传感器具有高响应、优异的选择性和快速的响应-恢复特性，这主要归因于4-羟基喹啉和Cu 2+与石墨烯纳米片的超分子组装。
In this study, a graphene-based composite 4HQ-rGO/Cu2+ was prepared via the supramolecular assembly of graphene nanosheets with 4-hydroxyquinoline (4HQ) and copper(ii) ions. The as-prepared supramolecular assembly exhibited an excellent and enhanced sensing performance towards acetic acid at room-temperature, which was due to the fact that the D–π–A molecules, i.e. 4HQ, were able to accelerate the charge transfer between the graphene nanosheets and 4HQ molecules when acetic acid was attached. In addition, at room temperature, the copper(ii) ions also played a critical role as the main active site for gas adsorption, and thus the as-fabricated sensor exhibited a high response, outstanding selectivity, and ultra-fast response/recovery time. To examine the selectivity of the Cu2+ ions for the supramolecular assembly, various other transition metal ions such as Mn2+, Fe3+, Co2+, Ni2+, Cu2+, and Cd2+ were attached to the 4HQ-rGO assembly, and their acetic sensing performance was determined. Interestingly, the supramolecular assembly with the Cu2+ ions (4HQ-rGO/Cu2+) exhibited the best sensing performance compared to other metal ion-based 4HQ-rGO materials. Compared with the typical acetic acid gas sensors reported in the literature, it is noteworthy to mention that the as-prepared 4HQ-rGO/Cu2+ supramolecular assembly exhibited the shortest gas response time (within 5 s) at room temperature. The presented study demonstrates that the as-prepared supramolecular assembly is a promising material as a room temperature acetic acid gas sensor in practical applications. The as-prepared 4HQ-rGO/Cu2+ sensor possessed a high response, outstanding selectivity and fast response-recovery characteristic, which was mainly attributed to the supramolecularly assemble of 4-hydroxyquinoline, and Cu2+ with graphene nanosheets.
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影响因子：
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作者：
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影响因子：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1016/j.saa.2018.11.049
发表时间：
2019-03-15
影响因子：
4.4
作者：
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通讯作者：
Paoprasert, Peerasak