Journal
MICROCHEMICAL JOURNAL
Volume 181, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2022.107779
Keywords
MOF-derivant of CuO; NCDs@Au nanoflows; Heterojunction; Photoelectrochemical; AFP detection
Categories
Funding
- Guangdong Basic and Applied Basic Research Foundation [2019A1515010618]
- Guangdong Special Funds for the Science & Technology Project [2019ST029, 2019ST089]
- Li Ka Shing Foundation Cross-Disciplinary Research Grant [2020LKSFG06C]
- Shantou Polytechnic [2019SZK2019Y01]
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In this study, a CuO/NCDs@Au heterostructured nanocomposite was successfully prepared, which exhibited improved photocurrent response due to the porous hollow structure. The material showed excellent photoelectric properties and could be used to fabricate a PEC sensing platform with high sensitivity and wide linear range.
Heterogeneous composite is considered a valuable material to boost the photo-electrochemical (PEC) properties. Herein, the porous hollow and thin-shell CuO particles were prepared by calcining a Cu-BTC precursor. N-doped carbon dots (NCDs) as both reductor and stabilizer can reduce the Au+ to gain regularly nanoflower NCDs@Au, which further to create type-II heterogeneous interface of CuO/NCDs@Au. PEC monitoring results showed that the CuO/NCDs@Au nanocomposite displayed markedly improved photocurrent response than the monocomponent CuO or CuO/NCDs. This outstanding photoelectric property was ascribed to the multiple reflection/scattering effects from the porous hollow structure of CuO particles which led to more photo-induced e(-)/h(+) pairs. The obtained heterostructured CuO/NCDs@Au could magnify synergistically the photocurrent output signal. Ab (antibodies) was accurately immobilized on the CuO/NCDs@Au modified ITO electrode via a facility amidation reaction. Fabricated Ab/CuO/NCDs@Au/ITO PEC sensing platform for AFP (alpha-fetoprotein) detection manifested an enhanced sensitivity (3.32 x 10(-4) ng mL(-1)) with wide linear range (0.001 similar to 300ng mL(-1)), which was superior compared to the electrochemical results. This works developed an excellent heterojunction nanocomposite of CuO/NCDs@Au, which provided well-synthesized strategies for structuring high-performance photocatalysts based on MOFs derivant.
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