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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY · 2022 · IF 4.831

An effective fluorescent probe for detection of phosgene based on naphthalimide dyes in liquid and gaseous phases

Yibin Zhang,Xianyu Qiu,Boling Wang,Xiaoling Liu,Yueting Cheng,Xiaoqian Rong,Yanhong Kuang,Lin Sun,Jun Liu,Rudy L. Luck,Haiying Liu

A fluorescent probe was developed for the detection of phosgene based on 1,8-naphthalimide, of which o-diaminobenzene was used as the recognition moiety. The probe does not fluoresce due to nonradiative decay. The probe reacts rapidly with phosgene via an intramolecular cyclization reaction, which induces large fluorescence due to increased rigidity in the resulting molecule and a low detection limit (0.23 nM). This probe has excellent selectivity for phosgene against competing interference analytes and, in the form of probe-loaded test paper, is an extremely sensitive method for phosgene sensing in the gas phase below 1 ppm concentrations.

研究领域: 化学 · 分析化学 · 环境科学

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CHEMICAL ENGINEERING JOURNAL · 2024 · IF 13.3

Synergistic removal of dimethoate through adsorption and photocatalytic oxidation in the presence of FeTiO3@Ag/Ag2O heterojunction

Yujie Zhang,Rongfang Yuan,Huilun Chen,Beihai Zhou

Combining adsorption and photocatalysis as a synergistic technique has become a research trend since adsorption is a prerequisite for photocatalytic surface reactions. In this study, a Z-scheme heterojunction FeTiO 3 @Ag/Ag 2 O with local surface plasmon resonance (LSPR) effect was fabricated for the removal of dimethoate from water. Under visible light irradiation, dimethoate could be completely removed within 75 min in the presence of 0.3 g/L FeTiO 3 @Ag/Ag 2 O (with Ag 2 O percentage of 10 wt%). High removal efficiency of dimethoate was mainly attributed to the synergistic effect between the large specific surface area of the catalyst (160.695 m 2 /g), the formation of heterojunction of FeTiO 3 and Ag 2 O, and the LSPR effect of metal Ag, which reinforced the absorption of visible light and promoted the separation and transfer of the carriers. Radicals of O 2 − and OH were the main reactive groups triggered the photocatalytic degradation process of dimethoate. Density Functional Theory (DFT) calculations indicate that P S and P–S bonds in the dimethoate molecule were more susceptible to be attacked by reactive groups. The degradation pathways mainly include oxidation of P S bond and cleavage of P–S bond, and the toxicity of most intermediates was reduced when compared with the parent compound. This study exploited the role of adsorption and photocatalysis in the field of pollutant removal, and provides ideas for the preparation of bifunctional photocatalysts.

CAS / MDL: 64-17-5 60-51-5 7761-88-8

研究领域: 环境科学 · 材料科学

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An effective fluorescent probe for detection of phosgene based on naphthalimide dyes in liquid and gaseous phases

Synergistic removal of dimethoate through adsorption and photocatalytic oxidation in the presence of FeTiO3@Ag/Ag2O heterojunction