Journal
MICROCHIMICA ACTA
Volume 186, Issue 7, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-019-3597-0
Keywords
Photocurrent; Pesticides; Calcination; Steric hindrance; Actual sample detection
Categories
Funding
- National Natural Science Foundation of China [21375116]
- priority academic program development of Jiangsu higher education institutions (PAPD)
- top-notch academic programs project of Jiangsu higher education institutions (TAPP)
- Jiangsu province research program on analytical methods and techniques on the shared platform of largescale instruments and equipment [BZ 201409]
- Yangzhou university science and technology innovation cultivation fund [2017CXJ010]
- open project of state key laboratory of inorganic synthesis and preparative chemistry, (Jilin University, China) [2019-26]
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A photoelectrochemical (PEC) sensor was constructed for the detection of non-electroactive malathion. It is based on the use of a hierarchical CuO material derived from a Cu-BTC metal-organic framework (where BTC stands for benzene-1,3,5-tricarboxylic acid). The modified CuO was obtained by calcination of Cu-BTC at a high temperature (300 degrees C) and possesses a high photocurrent conversion efficiency. Under irradiation with visible light and in the presence of malathion, the formation of the CuO-malathion complex on the CuO gave rise to an increase in steric hindrance. This results in a decrease in photocurrent. This novel PEC detection method has a lower detection limit of 8.6 x 10(-11) mol L-1 and a wide linear range (1.0 x 10(-10) similar to 1.0 x 10(-5) mol L-1).
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