Portable metal-organic framework alginate beads for high-sensitivity fluorescence detection and effective removal of residual pesticides in fruits and vegetables

Jia, Wenwen; Fan, Ruiqing; Zhang, Jian; Geng, Ziqi; Li, Pengxiang; Sun, Jiakai; Gai, Shuang; Zhu, Konglin; Jiang, Xin; Yang, Yulin

doi:10.1016/j.foodchem.2022.132054

Cited by 28 publications

(10 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…52,53 Owing to the exceptional structural and physical properties, availability, biocompatibility, and biodegradability of biopolymers, they represent a highly promising choice for the generation of sustainable materials with enhanced adsorption behavior. [54][55][56][57] Consequently, biopolymer-based adsorbents have exhibited fabulous adsorption behavior not only toward phosphates but also toward a wide variety of noxious contaminants, including pharmaceuticals, 51 hydrocarbons, 58 pesticides, 59 uoride, 60 nitrate, 61 heavy metals, 62,63 dyes 64 and nitro-aromatic compounds. 65 Amongst these brilliant biopolymers, anionic alginate (Alg) is a collective family produced from algae and bacteria at a comparatively low cost.…”

Section: Introductionmentioning

confidence: 99%

Recent developments in alginate-based adsorbents for removing phosphate ions from wastewater: a review

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Recent developments in alginate-based adsorbents for removing phosphate ions from wastewater: a review

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Pesticides are being abused in modern agricultural production in today’s society to increase economic benefits. Even though pesticides play an enormously significant role in agriculture, only 1% is needed to accomplish the intended impact, resulting in the release of a large number of pesticides into the soil and into the water environment, causing serious pollution to the environment. Among the most commonly used chemical pesticides, the broad-spectrum insecticide 2,6-dichloro-4-nitroaniline, often known as dicloran (DCN), has a toxicity category of III and has been extensively utilized to control diseases such as wheat powdery mildew, cotton boll rot, and plant rot in fruits, vegetables, and crops .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Two Luminescent Imidazolyl Cadmium-Organic Frameworks and Their Sensing Mechanism for 2,6-Dichloro-4-nitroaniline

Zhang

Liu

Karmaker

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

2,6-Dichloro-4-nitroaniline, alias dicloran (DCN), is a broad-spectrum pesticide that can cause irreversible damage to the human body. Therefore, it is of great significance to develop a technology for the rapid and convenient detection of DCN. Luminescent metal organic frameworks have attracted extensive attention in the field of sensing and detection due to their excellent optical properties. In this study, two kinds of 2D Cd-MOFs (CdMOF-1 and CdMOF-2) were developed for the detection of residual DCN in the environment. Both CdMOFs exhibit excellent solvent and acid–base stability and can respond to DCN quickly and sensitively in a short time (30 s). CdMOFs not only have good selectivity and anti-interference toward DCN but also have good reusability. Under the conditions of DCN concentrations of 1–15 and 0.3–30 μM, the change in fluorescence intensity of CdMOF-1 and CdMOF-2 showed a good linear relationship with DCN concentration (R 2 = 0.999/0.991), and the detection limits were 0.36 and 0.12 μM, respectively. Through ultraviolet–visible absorption spectroscopy (UV–Vis), X-ray photoelectron spectroscopy, fluorescence lifetime, and density functional theory calculations, it is revealed that the fluorescence quenching mechanisms of DCN for two kinds of Cd-MOFs are competitive absorption and photoinduced electron transfer, and there may be a weak π–π interaction. Finally, it is demonstrated that by using two types of fluorescent CdMOFs to make the fluorescent test paper and detect actual soil, these can be applied to the actual scene and achieve onsite real-time detection.

show abstract

“…We assume that if the target LMOF has the ability to selectively detect p -NA, such material is expected to show a similar ability to detect DCN. DCN is a hazardous pesticide belonging to toxicity class III, set by World Health Organization (WHO), and is widely used in the control of wheat powdery mildew, cotton rotten bells, fruit trees, and vegetable diseases. , However, DCN pesticides degrade slowly after use and can last for a long time under natural conditions. , Therefore, the development of efficient sensing methods for DCN remains a huge challenge. Introducing π-electron-rich functional ligands into MOFs is an efficient strategy to achieve high sensitivity and high selectivity in detecting electron-deficient analytes.…”

Section: Introductionmentioning

confidence: 99%

Highly Stable Luminescent Metal–Organic Frameworks for Ultrasensitive Detection of Nitroaniline Isomers: Application in In Situ Imaging of Toxic Pesticides

Zheng

Zhang

Bao

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

A powerful and promising route for developing chemically stable luminescent sensors for visible sensing of toxic pesticides in water and actual food samples is presented. Herein, a novel twofold interpenetrated luminescent metal–organic framework (MOF), Cd-TM, is prepared by incorporating 2-methyl-1H-imidazole-5-carbaldehyde as the imidazole-containing tridentate coordination linker and the luminescent organic bridging linker 4,4′,4″-tricarboxyltriphenylamine (H3tca) into a framework. Thanks to the imidazole coordination and structurally interpenetrated nature, the MOF exhibits high fluorescence stability and water stability up to 6 months. Fluorescence titration experiments reveal that Cd-TM shows rapid and ultrasensitive fluorescence response to p-nitroaniline compared with other nitroanilines with the limit of detection of about 8 nM. In particular, the Cd-TM material also shows high sensitivity to detect dicloran (DCN, 2,6-dichloro-4-nitroaniline) pesticides with the structure similar to that of p-NA. The detection limit is 7.6 nM, which is found to be superior to those of the recently reported MOF-based sensors. In addition, the detection mechanism of DCN is studied by FT-IR analysis, SEM/EDX elemental mapping, XPS, and theoretical calculations. Practically, the recoveries of spiked environmental samples were found to be satisfactory (95.8–106.4%). Further, Cd-TM is also used for the rapid in situ nondestructive imaging detection of pesticide residues in simulated fresh agricultural products. These results indicate that Cd-TM has the potential to detect organophosphorus pesticide contamination with rapid in situ imaging via easy-to-read visual signals.

show abstract

Portable metal-organic framework alginate beads for high-sensitivity fluorescence detection and effective removal of residual pesticides in fruits and vegetables

Cited by 28 publications

References 42 publications

Recent developments in alginate-based adsorbents for removing phosphate ions from wastewater: a review

Recent developments in alginate-based adsorbents for removing phosphate ions from wastewater: a review

Fabrication of Two Luminescent Imidazolyl Cadmium-Organic Frameworks and Their Sensing Mechanism for 2,6-Dichloro-4-nitroaniline

Highly Stable Luminescent Metal–Organic Frameworks for Ultrasensitive Detection of Nitroaniline Isomers: Application in In Situ Imaging of Toxic Pesticides

Contact Info

Product

Resources

About