Rational design of molecularly imprinted electrochemical sensor based on NbC-MWCNTs heterostructures for highly sensitive and selective detection of Ochratoxin a.

Developing an efficient method for screening Ochratoxin A (OTA) in agriculture products is vital to ensure food safety and human health. However, the complex food matrix seriously affects the sensitivity and accuracy. To address this issue, we designed a novel molecularly imprinted polymer (MIP) electrochemical sensor based on multiwalled carbon nanotube-modified niobium carbide (NbC-MWCNTs) with the aid of the density functional theory (DFT).

Polydopamine@ZIFs with enhanced electrochemiluminescence quenching performance for mycotoxin detection.

Quench-type electrochemiluminescence (ECL) immunosensors are appealing for detecting small molecule contaminants in signal-on mode, for which efficient ECL quenchers are highly desirable. Here, the classical quencher of polydopamine (PDA) was transformed into a unique structure by introducing zeolite imidazole frameworks (ZIFs). Besides the inherent energy transfer quenching effect on ECL, the resulting PDA@ZIFs exhibits a high scavenging property against electrogenerated coreactant-radicals and inhibits the formation of excited luminophore.

Nanobody@Biomimetic mineralized MOF as a sensing immunoprobe in detection of aflatoxin B.

Nanobody(Nb) is too small to carry more signal reporters, which often leads to low sensitivity in immunoassay. Herein, we proposed a novel immunoprobe integration of Nb and biomimetic mineralized metal-organic frameworks(MOF), in which plenty of succinylated horseradish peroxidase(sHRP) were encapsulated within a single MOF and the Nb was assembled on the biomimetic mineralized MOF. It overcomes the dilemma that the Nb is difficult to carry more signal reporters.

Extraction of Camphor Tree Essential Oil by Steam Distillation and Supercritical CO Extraction.

The essential oil extracted from leaves is a mixture of volatile compounds, mainly terpenes, and is widely used in medicine, perfume and chemical industries. In this study, the extraction processes of essential oil from leaves by steam distillation and supercritical CO extraction were summarized and compared, and the camphor tree essential oil was detected by GC/MS. The extraction rate of essential oil extracted by steam distillation is less than 0.

MoS quantum dots and titanium carbide co-modified carbon nanotube heterostructure as electrode for highly sensitive detection of zearalenone.

A novel electrochemical sensor has been fabricated for sensitive determination of zearalenone (ZEA) in food samples based on molybdenum disulfide quantum dots (MoS QDs) and two-dimensional titanium carbide (2D-TiCT MXene) co-modified multi-walled carbon nanotube (MWCNT) heterostructure. Physical and electrochemical characterizations reveal that 2D-TiCT and MoS QDs co-modified MWCNTs yields synergistic signal amplification effect, together with large specific surface area and excellent conductivity for the heterostructure, endowing the developed sensor with high detection performance to ZEA. Under optimized conditions, the sensor shows a wide linear range from 3.

A sensitive electrochemical immunosensing interface for label-free detection of aflatoxin B by attachment of nanobody to MWCNTs-COOH@black phosphorene.

A label-free electrochemical immunosensor has advantages of real-time and rapid detection, but it is weak in detection of small molecular toxins such as aflatoxin B (AFB). The greatest obstacle to achieving this is that small molecules bound to a common immunosensing interface cannot interfere with electron transfer effectively and the detection signal is so weak. Therefore, a sensitive electrochemical immunosensing interface for small molecules is urgently needed.

Multiwalled carbon nanotubes modified two dimensional MXene with high antifouling property for sensitive detection of ochratoxin A.

Electrochemical sensor has great potential in the detection of small molecules by virtues of low cost, fast response, and easy to miniaturization. However, electrochemical sensing of ochratoxin A (OTA) was seriously hindered by the heavy electrode-fouling effect and poor electrochemical activity inherent from OTA molecular. Herein, two-dimensional titanium carbide (2D TiC) MXene incorporated with carboxylic multiwalled carbon nanotubes (cMWCNTs) was developed as a glassy carbon electrode modifier for rapid and sensitive detection of OTA.

Anchoring Metallic MoS Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines.

Carbendazim, a very common contamination to the traditional Chinese medicines (TCMs), has posed serious threat to the environment and human health. However, sensitive and selective detection of carbendazim (MBC) in the TCMs is a big challenge for their complex chemical constituents. In this work, a 0D/1D nanohybrid was developed by anchoring 1T-phased MoS quantum dots (QDs) over multiwall carbon nanotubes (MWCNTs) via a facile assembly method.

Phosphorene nanocomposite with high environmental stability and antifouling capability for simultaneous sensing of clenbuterol and ractopamine.

A series of phosphorene (BP) nanocomposites was prepared to realize simultaneous electrochemical determination of clenbuterol (CLB) and ractopamine (RAC). CLB and RAC are the most commonly used β-agonists in animal-derived food. The BP nanohybrid was obtained by co-decoration with both mono(6-mercapto-6-deoxy)-β-cyclodextrin and poly(3,4-ethylenedioxythiophene) nanoparticles.