title: Boosted Sensor Performance by Surface Modification of Bifunctional rht-Type Metal-Organic Framework with Nanosized Electrochemically Reduced Graphene Oxide.
abstract: The surface and interface could be designed to enhance properties of electrocatalysts, and they are regarded as the key characteristics. This report describes surface modification of a bifunctional rht-type metal-organic framework (MOF, Cu-TDPAT) with nanosized electrochemically reduced graphene oxide (n-ERGO). The hybrid strategy results in a Cu-TDPAT-n-ERGO sensor with sensitive and selective response toward hydrogen peroxide (H2O2). Compared with Cu-TDPAT, Cu-TDPAT-n-ERGO exhibits significantly enhanced electrocatalytic activities, highlighting the importance of n-ERGO in boosting their electrocatalytic activity. The sensor shows a wide linear detection range (4-12 000 μM), and the detection limit is 0.17 μM (S/N = 3) which is even lower than horseradish peroxidase or recently published noble metal nanomaterial based biosensors. Moreover, the sensor displays decent stability, excellent anti-interference performance, and applicability in human serum and urine samples. Such good sensing performance can be explained by the synergetic effect of bifunctional Cu-TDPAT (open metal sites and Lewis basic sites) and n-ERGO (excellent conductive property). It is expected that rht-type MOF-based composites can provide wider application potential for the construction of bioelectronics devices, biofuel cells, and biosensors.
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Li
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Jingyu
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: He
authors.initials: H
authors.lastname: Liu
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zheng
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Gu
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Yan
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Yaru
authors.initials: Y
authors.lastname: Li
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Nannan
authors.initials: N
authors.lastname: Lu
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Zhiquan
authors.identifier: http://orcid.org/0000-0003-2764-321X
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Laboratory of Analytical Chemistry, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Guodong
authors.initials: G
authors.lastname: Feng
keywords: electrochemical; hydrogen peroxide; nanosized graphene; rht-type metal−organic framework; synergetic effect