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In modern farming, pesticides are extensively used to deliver high-yield harvests with no concern about the amount of toxicity involved in the agriculture process. The continuous usage of pesticides also causes severe health issues for human health. Thus, promoting a rapid and accurate method for ultrasensitive and lowlevel detection of toxic pesticides is essential in real food samples to avoid serious health issues. Herein, we successfully synthesized graphene oxide (GO) incorporated with dysprosium stannate nanoplatelets (Dy 2 Sn 2 O 7 ) through a facile coprecipitation method followed by ultrasonication, which is used for the electrochemical detection of carbofuran (CF) in vegetable samples. The unique structural properties of Dy 2 Sn 2 O 7 /GO were successfully characterized by various analytical and spectroscopic techniques. The electrochemical impedance spectroscopy (EIS) measurements revealed overall elevated electrochemical behavior of the Dy 2 Sn 2 O 7 / GO composite. Additionally, the electrochemical performance of Dy 2 Sn 2 O 7 /GO analyzed by cyclic voltammetry (CV) showed superior electrocatalytic activity toward the detection of CF compared with bare and other composite electrodes due to fast electron transfer behavior and interlayer effect of Dy 2 Sn 2 O 7 NPs and GO. Furthermore, differential pulse voltammetry (DPV) analysis of Dy 2 Sn 2 O 7 /GO revealed the low-level detection limit of CF 14.8 nM with the linear concentration range of 0.05−124.65 μM and a sensitivity of 2.632 μA μM −1 cm −2 . Indeed, the real-time analysis of CF at Dy 2 Sn 2 O 7 /GO retained an adequate recovery level in vegetable samples that are desirable for practical applications and, thus, can generate the diminution of CF in the environmental contamination. Given the acceptable recovery level of CF, the Dy 2 Sn 2 O 7 /GO is a competent electrocatalyst for detecting toxic pesticides in real samples to avoid health issues.

Inorganic perovskite-based alkaline earth oxide materials for electrochemical sensing devices are an unwrapped research field yet to be studied. Herein, we designed a novel perovskite-type calcium stannate (CaSnO3) material with stone-shaped structural morphology synthesized by a simple coprecipitation method with the aid of urea and utilized as an electrocatalyst for the electrochemical detection of photographic developing agent metol (MT). The synthesized CaSnO3 was systematically characterized with the help of X-ray diffraction (XRD), Raman, Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy, elemental mapping analysis, high resolution transmission electron microscope (HR-TEM), and electron spectroscopy for chemical analysis (ESCA). Furthermore, the electrochemical property of CaSnO3 was examined by cyclic voltammetry and differential pulse voltammetry techniques. As a result, CaSnO3 modified with a glassy carbon electrode (CaSnO3/GCE) implies better electrocatalytic activity with an enhanced redox peak response, wider linear range (0.01–123 μM), lower detection limit (0.003 μM), and appreciable sensitivity toward the detection of MT. In addition to that, the CaSnO3 modified electrode has excellent selectivity with the existence of potentially interfering compounds such as cationic/anionic species and biological substances. Moreover, the CaSnO3 modified electrode has better reproducibility, repeatability, and storage stability. Further, the practical viability of the synthesized CaSnO3 was investigated by using lake water as a real sample, revealing reasonable recovery results.

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In recent years, the cost-effective fabrication of inorganic materials has received considerable attention to the researchers working in various fields. In this current work, we report the ultrasonication assisted synthesis...

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Rapid advancements in materials that offer the appropriate mechanical strength, barrier, and antimicrobial activity for food packaging are still confronted with significant challenges. In this study, a modest, environmentally friendly method was used to synthesize functionalized octakis(3-chloropropyl)octasilsesquioxane [fn-POSS] nanofiller. Composite films compared to the neat thermoplastic starch (TS) film, show improved thermal and mechanical properties. Tensile strength results improved from 7.8 MPa to 28.1 MPa (TS + 5.0 wt.% fn-POSS) with fn-POSS loading (neat TS). The barrier characteristics of TS/fn-POSS composites were increased by fn-POSS by offering penetrant molecules with a twisting pathway. Also, the rates of O2 and H2O transmission were decreased by 50.0 cc/m2/day and 48.1 g/m2/day in TS/fn-POSS composites. Based on an examination of its antimicrobial activity, the fn-POSS blended TS (TSP-5.0) film exhibits a favorable zone of inhibition against the bacterial pathogenic Staphylococcus aureus and Escherichia coli. The TS/fn-POSS (TSP-5.0) film lost 78.4% of its weight after 28 days in natural soil. New plastic materials used for packaging, especially food packaging, are typically not biodegradable, so the TS composite with 5.0 wt.% fn-POSS is therefore of definite interest. The incorporation of fn-POSS with TS composites can improve their characteristics, boost the use of nanoparticles in food packaging, and promote studies on biodegradable composites.

Biodegradable composites with antimicrobial properties were prepared with microparticles of silver stannate (AgSnO2) and poly(butylene adipate-co-terephthalate) (PBAT) and tested for applications in food packaging. The PBAT matrix was synthesized and confirmed by 1H-nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction (XRD). Ultrasonic and coprecipitation methods were used to synthesize AgSnO2. A two-step mixing method and a solvent cast technique were utilized to fabricate the PBAT composites (different weight % of AgSnO2) for packaging foods. Attenuated total reflection-infrared spectroscopy, X-ray photoelectron spectroscopy, XRD, and scanning electron microscopy were used to investigate the formation, structure, and size of the composites. Thermogravimetric analysis and differential thermal calorimetry were used to examine the PBAT/AgSnO2 composites. The best characteristics are exhibited in 5.0 wt. % AgSnO2 loaded PBAT composite. The tensile strength, elongation at break, water vapor transmission rate, and oxygen transmission rate were 22.82 MPa, 237.00%, 125.20 g/m2/day, and 1104.62 cc/m2/day.atm, respectively. Incorporating AgSnO2 enhanced the hydrophobicity of the PBAT materials as evaluated by the water contact angle. The 5.0 wt. % AgSnO2/PBAT film shows a favorable zone of inhibition against the bacteria pathogens S. aureus and E. coli, according to an evaluation of its antimicrobial activity. The weight loss of 5% AgSnO2/PBAT film was 78.4% after eight weeks in the natural soil environments. In addition, the results of food quality studies recommend that AgSnO2/PBAT (5.0 wt. %) film had a longer food shelf life than the neat PBAT and commercial, increasing it from one to 14 days for carrot vegetables.