한빛사논문
- 조회458
Longhui Zheng a, Haobo Zhang a, Miae Won b, Eunji Kim b, Mingle Li b, Jong Seung Kim b
aCollege of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
bDepartment of Chemistry, Korea University, Seoul, 02841, South Korea
Corresponding authorLons: Longhui Zheng, Mingle Li, Jong Seung Kim
Abstract
The development of superior photoelectrochemical (PEC) sensors for biosensing has become a major objective of PEC research. However, conventional PEC-active materials are typically constrained by a weak photocurrent response owing to their limited surface-active sites and high electron-hole recombination rate. Here, a boron and graphene quantum dots codoped g-C3N4 (named GBCN) as PEC sensor for highly sensitive dopamine (DA) detection was fabricated. GBCN exhibited the greatest photocurrent response and PEC activity compared to free g-C3N4 and g-C3N4 doped with boron. The proposed PEC sensor for DA determination exhibited a broad linear range (0.001-800 μM) and a low detection limit (0.96 nM). In particular, a sensitivity up to 10.3771 μA/μM/cm2 was seen in the case of GBCN. The high PEC activity can be attributed to the following factors: (1) the boron and graphene quantum dots co-doping significantly increased the specific surface area of g-C3N4, providing more adsorption sites for DA; (2) the dopants extended the absorption intensity of g-C3N4, red-shifting the absorption from 470 to 540 nm; and (3) the synergism of boron and graphene quantum dots efficiently boosted the photogenerated electrons migration from the conduction band of g-C3N4 to graphene quantum dots, facilitating charge separation. In addition, GBCN also exhibited good anti-interference ability and stability. This research may shed light on the creation of a highly sensitive and selective PEC platform for detecting biomolecules.
논문정보
- Research article
- 2023년 03월 (BRIC 등록일 2023-03-10)
- 국내(교신)+국외 연구진
- 바이오·의료융합 > 바이오센싱 및 나노바이오물질
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