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Modification of Cu 3 (BTC) 2 with Cobalt Ion for Adsorption and Visualized Detection of Formaldehyde Gas
Author(s) -
Gong Wenpeng,
Zhang Li,
Yu Ying,
Lin Bixia,
Wang Yumin,
Cao Yujuan,
Guo Manli
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5783
Subject(s) - formaldehyde , adsorption , chemistry , cobalt , desorption , x ray photoelectron spectroscopy , inorganic chemistry , nuclear chemistry , analytical chemistry (journal) , chemical engineering , chromatography , organic chemistry , engineering
In this paper, cobalt ion was employed to modify Cu 3 (BTC) 2 to improve the adsorption property for formaldehyde gas. The cobalt ion was doped during the synthesis of Cu 3 (BTC) 2 to form a product of CuCo‐BTC. As the optimization assay indicated, when the molar ratio of the Co 2+ /Cu 2+ was 3/17, the adsorption amount for formaldehyde gas achieved the maximum, which is 1.6‐fold to that of Cu 3 (BTC) 2 . ICP‐MS, XPS, XRD, FT‐IR, SEM and N 2 adsorption–desorption were used to investigate the structure and property of the CuCo‐BTC. Subsequently, the adsorption kinetic process of the CuCo‐BTC was assessed, the result suggests it coinciding to the pseudo first‐order kinetic model which belongs to the physical adsorption process. The further assays indicated the CuCo‐BTC possessing higher and faster colorimetric response to formaldehyde with indicator than other metal organic framework materials or common indicators. Therefore, it was utilized to fabricate a functional paper chip to perform the visualized detection of formaldehyde gas. The result displayed a sensitive response to formaldehyde gas in the concentration range of 0.02 ~ 0.08 mg/m 3 . Besides, the whole colorimetric assay merely takes 150 s, suggesting a favorable application prospect in the on‐site test of detrimental gas.