Shengrui Xu

Henan Normal University · School of Chemistry and Chemical Engineering

Solvent-free analysis of organic pollutants from a complex matrix has attracted significant attention. In this work, we designed and fabricated a facile cooling-assisted solid-phase microextraction device (CA-SPME) that could be used for the solvent-free extraction of volatile and semivolatile compounds from a complex matrix using a commercial SPME...

Improved performance of the cold fiber solid-phase microextraction (CF-SPME) technique was accomplished with use of the pressure-balanced procedure. In order to obtain a pressure-balanced state during extraction at 200 °C, 7 ml of air volume was withdrawn from 10 ml commercial vials, while 10 ml were withdrawn from vials where 5 μl diethylamine was...

Lotus-like [email protected] embedded porous carbons ([email protected]/PCs) were fabricated by pyrolysis of MOF-74/cellulose nanocrystal hybrids, and used as a solid phase microextraction (SPME) coating for ultrasensitive determination of chlorobenzenes (CBs) from water combined with gas chromatography-mass spectrometry. Owing to its abundant chem...

In this study, a cooling assisted solid-phase microextraction technique (CA-SPME) was proposed and used for identifying volatile and semi-volatile compounds in edible oil innovatively coupled to gas chromatography-mass spectrometry. Compared with regular SPME technique, CA-SPME presented significantly higher extraction efficiencies for analytes in...

In this work, carbon dots-reduction graphene oxide (CDs/RGO) composite was synthesized by a facile and green strategy with one-step reduction and self-assembly of GO and CDs under ultrasonic treatment. CDs was successfully applied to reduce GO to RGO, and anchored on the surface of RGO simultaneously under ultrasonic treatment within 20 min. The re...

Herein, novel, loose, and porous graphite phase carbon nitride/porous carbon (g-C3N4@PC) composites were prepared by decorating cellulose nanocrystals (CNCs). The characterization results demonstrate that the as-prepared composites presented high specific surface areas, porous structures, and abundant chemical groups, with the modification of CNCs....

Herein, sea urchin-like SnO2/α-Fe2O3 (SU-SnO2/α-Fe2O3) heterostructural microspheres was prepared successfully by two-steps hydrothermal treatment, and used as semiconductor for acetone gas sensing. SEM and TEM characterizations showed that as-prepared composites exhibited sea urchin-like morphology with microstructures of inner SnO2 microspheres a...

In this study, polyacrylic acid functionalized N-doped porous carbon derived from shaddock peels (PAA/N-SPCs) was fabricated and used as a solid-phase microextraction (SPME) coating for capturing and determining volatile halogenated hydrocarbons (VHCs) from water. Characterizations results demonstrated that the PAA/N-SPCs presented a highly meso/ma...

The ultra-loose and lightweight reduced graphene oxide/cellulose nanocrystal (rGO/CNC) hybrid aerogel was developed by hydrothermal method. Owing to the dispersibility and plentiful chemical groups of CNC, a variety of rGO/CNC hybrid aerogels with tunable dimensions were formed, thereby overcoming the limitation of size control of rGO aerogels by h...

An in-situ synthesis strategy was proposed for fabrication of carbon dots embedded wrinkled mesoporous silica (CDs/WMS) microspheres. Characterizations results demonstrated that the doping of CDs with a moderate content still allowed the microspheres to maintain wrinkled and highly mesoporous structures. The CDs/WMS composite was subsequently emplo...

The green sample pretreatment technique has been one of the research hotspots in the analysis of complex matrix samples． Although solvent-free extraction of volatile organic compounds in samples can be implemented by headspace solid-phase microextraction ( HS-SPME) ，it is difficult to achieve satisfactory results for complex matrix samples． Cooling...

In this work, carbon dot-decorated graphite carbon nitride composites (CDs/g-C3N4) were synthesized and innovatively used as a SPME coating for the sensitive determination of chlorobenzenes (CBs) from water samples, coupled with gas chromatography–mass spectrometry. The CDs/g-C3N4 coating presented superior extraction performance in comparison to p...

To remove the pollutant methylene blue (MB) from water, a sheet-like skeleton carbon derived from shaddock peels (SPACs) was prepared by NaOH activation followed by a calcination procedure under nitrogen protection in this study. Characterization results demonstrated that the as-prepared SPACs displayed a hierarchically porous structure assembled w...

Citation: Dong, P.; Liu, H.; Xu, S.; Chen, C.; Feng, S.; Long, A. Sheet-like Skeleton Carbon Derived from Shaddock Peels with Hierarchically Porous Structures for Ultra-Fast Removal of Methylene Blue. Water

Core-shell structured Fe2O3/CeO2@MnO2 microspheres were fabricated and used as solid-phase microextraction coating for determination of polycyclic aromatic hydrocarbons (PAHs) in water samples. XPS spectra demonstrated the generation of abundant surface oxygen on Fe2O3/CeO2@MnO2 microspheres, which provided binding sites for enhancement of analyte...

A robust magnetic solid-phase extraction (MSPE) method based on magnetic covalent organic framework (MCOF) coupled with high-performance liquid chromatography (HPLC)-ultraviolet (UV)/mass spectrometry (MS) was proposed for the determination of trace diclofenac sodium (DS) in milk. The prepared MCOF exhibited high extraction efficiency, which can be...

Hydrophilic ionic liquids are often used to extract the active ingredients of medicinal plants, while hydrophobic ionic liquids are rarely used to directly extract solid samples. In this paper, a simple, novel and efficient temperature-controlled hydrophobic ionic liquids-based ultrasound/heating-assisted extraction (TC-ILs-UHAE) procedure coupled...

In this study, facile fabrication of three-dimensional (3D) pompon-like gold/zinc oxide (Au/ZnO) porous microspheres by hydrothermal procedure was investigated. These microspheres were utilized as solid phase microextraction (SPME) coating for determination of volatile fatty acids (VFAs) from foot odor coupling with gas chromatography-mass spectrom...

A versatile nanoprobe for acetone vapor was designed and fabricated. It is based on the use of gold-doped three-dimensional (3D) hierarchical porous zinc oxide microspheres (Au/ZnO HPMSs). The nanoprobe was synthesized by annealing zinc hydroxide carbonate precursor (obtained by a hydrothermal method) doped with gold nanoparticles. The resulting pr...

A versatile nanoprobe for acetone vapor was designed and fabricated. It is based on the use of gold-doped three-dimensional (3D) hierarchical porous zinc oxide microspheres (Au/ZnO HPMSs). The nanoprobe was synthesized by annealing zinc hydroxide carbonate precursor (obtained by a hydrothermal method) doped with gold nanoparticles. The resulting pr...

Rapid quantitative determination of bulk molecular concentration in solid samples without sample pretreatment is demonstrated by the internal extractive electrospray ionization mass spectrometry (iEESI-MS) analysis of six β-agonists, including salbutamol (Sal), clenbuterol (Cle), ractopamine (Rac), terbutaline (Ter), tulobuterol (Tul), brombuterol...

A novel gas microsensor combining SnO2 submicron/nanostructured porous sensitive film with Micro-Electro-Mechanical systems (MEMS) microheater was successfully fabricated. The film was made of hierarchically mixed Pd/SnO2 (HM-PTO) composites composed of Pd/SnO2 hollow submicrospheres (Pd/SnO2-HSs) and Pd/SnO2 nanoparticles (Pd/SnO2-NPs) deposited o...

The emission of toxic elements during combustion process of Se-rich stone coal can cause serious environment issues. The use of solid sorbents is an effective way to control the emission of toxic trace elements from coal combustion. In this paper, a composite sorbent of calcium-based nano-ZnO was prepared by ball milling of CaCO3 and nano-ZnO powde...

Through the use of a homemade sol–gel-derived fiber, a headspace solid-phase microextraction technique coupled to gas chromatography with mass spectrometry method was developed for the determination of fatty acids with long, even-numbered carbon chains (C12–C24) in soil samples. The experimental parameters such as reaction time, temperature and ion...

Selenium can be emitted to the environment during the combustion of Se-rich stone coal, both polluting the air and wasting a scarce resource of Se. In this work, the nanosized metal oxides ZnO, Al2O3, and Fe3O4 were combined with CaO to form composite materials. These were investigated as sorbents for the removal of Se from the flue gases generated...