Sea-Urchin-Like Bi₂S₃ Microstructures Decorated with Graphitic Carbon Nitride Nanosheets for Use in Food Preservation

Abstract

Although nitrite (NO2 –) is listed as a poisonous inorganic pollutant that is dangerous to humans and other creatures, it is widely used in food preservatives and agricultural products. It is frequently detected in many foods, water, environmental systems, and biological samples. In recent times, many techniques for detecting and monitoring NO2 – have been proposed. Among them, the electrochemical method has been receiving particular attention due to its ease of operation. At the same time, nanocrystals of metal sulfide materials have gained the attention of researchers due to a wide range of materials with efficiently tunable properties. This article presents a rational hydrothermal approach to the synthesis of size- and morphology-controlled hierarchically grown bismuth sulfide (Bi2S3) nanorods. Changes are made to the prime parameter; temperature yields the g-C3N4 nanosheets covered on the sea-urchin-like structure of Bi2S3 nanorods. The textural characteristics, surface morphology, and chemical compositions of g-C3N4/Bi2S3 have been studied using a selection of spectroscopic methods. Accordingly, the produced catalysts were examined to detect the electrochemically active NO2 –. The g-C3N4/Bi2S3-modified electrode attained a broad linear range (0.001–385.4 μM) and a higher sensitivity with a lower detection limit (0.4 nM). Therefore, g-C3N4/Bi2S3 hierarchically grown through the hydrothermal route could be a promising sensing platform to determine NO2 – in real-time.

Deep Eutectic Solvent-Mediated Synthesis of Spinel Zinc Chromite Nanoparticles: A Simple Label-Free Electrochemical Sensor for Dopamine and Ascorbic Acid

“…Bare GCE > ZnCr 2 O 4 /GCE was the order in which the R ct values appeared. According to these EIS measurements, the ZnCr 2 O 4 /GCE material interface has a robust electrical conductivity. , …”

Sea urchin-like Bi2S3/curcumin heterojunction rapidly kills bacteria and promotes wound healing under near-infrared light

“…2a). 28,35 Since the hybrid material Bi 2 S 3 /Cur contains only a small amount of Cur, no characteristic peak of Cur was detected. The above results indicate that the phase structure of Bi 2 S 3 is not changed by the addition of Cur.…”

“…The synthesis method of Bi 2 S 3 /Cur is based on previous work. 35 1.46 g Bi 2 (NO 3 ) 3 •5H 2 O and 0.2 g Curcumin (Cur) were weighed in a beaker, 40 mL Ethylene glycol was added into the beaker, and solution A was obtained after magnetic stirring for 1 h. In addition, Put the appropriate amount of thioureas (CS (NH 2 ) 2 ) was dissolved in 30 mL glycol for magnetic stirring for 1 h, and solution B was obtained. Solution B was slowly added to solution A and stirred for 30 min, then transferred to a Teflon-lined stainless steel autoclave with a volume of 100 mL, heated at 150 °C for 2 h and cooled to room temperature.…”

In Situ Synthesis of a Bismuth Vanadate/Molybdenum Disulfide Composite: An Electrochemical Tool for 3-Nitro-l-Tyrosine Analysis

“…The nanostructured surface area of the working electrode significantly influences its electrode response. The electroactive surface area of the modified electrodes was calculated using the Randles–Sevcik equation (eq ): , where I P , A , D , n , v , and C correspond to the redox peak current (μA), electrochemically active surface area (cm 2 ), diffusion coefficient (7.6 × 10 –6 ), number of electrons in the reaction ( n = 1), scan rate (V s –1 ), and the bulk concentration of the molecules (0.0005 M), respectively. The calculated surface areas of the bare GCE, MoS 2 /GCE, BiVO 4 /GCE, and MoS 2 @BiVO 4 /GCE are 0.081, 0.135, 0.147, and 0.161 cm 2 , respectively.…”