Qin Shuai

Name: 帅琴

Organization: China University of Geosciences , China

Department:

Title: Professor(PhD)

Chemicals
References

Rapid Identification of Unknown Organic Iodine in Small-Volume Complex Biological Samples Based on Nanospray Mass Spectrometry Coupled with in-Tube Solid Phase Microextraction

Co-reporter:Qing Chang, Yue’e Peng, Lifen Yun, Qingxin Zhu, Shenghong Hu, and Qin Shuai

Analytical Chemistry April 4, 2017 Volume 89(Issue 7) pp:4147-4147

Publication Date(Web):March 13, 2017

DOI:10.1021/acs.analchem.7b00037

A new method for rapid screening of unknown organic iodine (OI) in small-volume complex biological samples was developed using in-tube solid phase microextraction (SPME) nanospray mass spectrometry (MS). The method proposed a new identification scheme for OI based on nanospray high-resolution mass spectrometry (HR-MS). The mass ranges of OI ions were confirmed using the t-MS2 scan mode first; then, the possible precursor ions of OI were selected and identified orderly in full MS/ddMS2 and t-MS2 scan modes. Besides, in-tube SPME was used for the pretreatment of small-volume biological samples, and it was the first time in-tube SPME combined with nanospray MS for OI identification. The whole analysis procedure took only 8 min and consumed 50 μL per sample. Using the new method, six kinds of OI added to urine and an unknown OI C12H23O11I in human milk were successfully identified. Moreover, the proposed identification scheme is also suitable for other ambient mass spectrometry (AMS) to determine unknown compounds with characteristic fragment ions.

Zinc ferrite composite material with controllable morphology and its applications

Co-reporter:Ming Qin, Qin Shuai, Guanglei Wu, Bohan Zheng, Zhengdong Wang, Hongjing Wu

Materials Science and Engineering: B 2017 Volume 224(Volume 224) pp:

Publication Date(Web):1 October 2017

DOI:10.1016/j.mseb.2017.07.016

•The ZnFe2O4 with controlled morphologies and structures have been investigated.•We summarized the synthetic methods as well as the modifications of the ZnFe2O4.•The review also dealt with applications of the ZnFe2O4.ZnFe2O4 is an attractive material due to its unique properties and various applications. A large volume of works on the synthesis of ZnFe2O4 have been reported such as mechanochemical synthesis, co-precipitation method, sol-gel auto-combustion method, electrospinning method, hydrothermal/solvothermal method, and spray drying. The synthetic methodologies have significant influence on the properties, morphologies and structures of the ZnFe2O4. Moreover, with the Fe3+ and Zn2+ substituted by different metal ions, the properties of ZnFe2O4 can be altered. Besides, the zinc ferrite composites with controlled morphologies and structures have been investigated. Owing to the enhanced magnetic, electrical and catalytic properties of the zinc ferrite composites, extensive applications of zinc ferrite composites have been achieved. In this review, we summarized the synthetic methods as well as the modifications of the ZnFe2O4. The review also dealt with applications of the ZnFe2O4 and its composites in the fields of sensors, photocatalysis and lithium ion batteries, etc.Download high-res image (42KB)Download full-size image

Bismuth phosphates as intermediate temperature proton conductors: From polycrystalline powders to amorphous glasses

Co-reporter:Yunjie Huang, Erik Christensen, Qin Shuai, Qingfeng Li

International Journal of Hydrogen Energy 2017 Volume 42, Issue 10(Volume 42, Issue 10) pp:

Publication Date(Web):9 March 2017

DOI:10.1016/j.ijhydene.2016.04.159

•Polycrystalline and amorphous glasses of bismuth phosphates prepared.•Major crystalline phases of monoclinic Bi2P4O13 and monoclinic BiPO4.•Intrinsic anhydrous proton conductivity of up to 10−5 S/cm.•High conductivity of 10−2 S/cm level under humidified atmosphere.•Good conductivity stability during humidity cycling for over 100 h.Proton conducting electrolyte materials operational in the intermediate temperature range of 200–400 °C are of special interest for applications in fuel cells and water electrolysers. Bismuth phosphates in forms of polycrystalline powders and amorphous glasses are synthesized and investigated by scanning electron microscopy, X-ray diffraction, FT-IR, thermogravimetric analysis and AC impedance. Under dry atmosphere the pure crystalline and amorphous phosphates exhibit an intrinsic conductivity of up to 10−5 S cm−1 at 250 °C. In the presence of atmospheric humidity the conductivity of both types of phosphates is significantly enhanced, reaching about 10−2 S cm−1 at a water vapor partial pressure above 0.5 atm. During a period of more than 100 h with four humidity cycles from zero to 0.58 atm of the water vapor partial pressure, the phosphates show good stability, suggesting the potential as an intermediate temperature electrolyte.

Arsenic biotransformation and an arsenite S-adenosylmethionine methyltransferase in plankton

Co-reporter:Jagdeesh S. Uppal, Qin Shuai, Zhuang Li, X. Chris Le

Journal of Environmental Sciences 2017 Volume 61(Volume 61) pp:

Publication Date(Web):1 November 2017

DOI:10.1016/j.jes.2017.11.010

Enhanced proton conductivity of niobium phosphates by interfacing crystal grains with an amorphous functional phase

Co-reporter:Yunjie Huang, Lele Yu, Haiyan Li, Chengshuai Wang, Qingfeng Li, Qin Shuai

Solid State Ionics 2016 Volume 294() pp:54-58

Publication Date(Web):15 October 2016

DOI:10.1016/j.ssi.2016.06.018

•An activation process is done to prepare intermediate temperature proton conductor.•High surface area of niobium phosphate precursor benefits the activation process.•The obtained niobium phosphate shows a stable anhydrous conductivity of 0.03 S cm− 1.Niobium phosphate is an interesting proton conductor operational in the intermediate temperature range. In the present work two forms of phosphates were prepared: an amorphous one with high specific area and a crystalline one with low specific surface area. Both phosphates exhibited very low proton conductivities. An activation process was developed to convert the phosphates into crystal grains with a phosphorus rich amorphous phase along the grain boundaries. As a result, the obtained niobium phosphates showed considerably enhanced and stable proton conductivities. The activation effect was prominent when the high surface area amorphous phosphate was used as the precursor. At 250 °C thus obtained niobium phosphate showed a high and stable conductivity of 0.03 S cm− 1 under dry atmosphere and of 0.06 S cm− 1 at a water partial pressure of 0.12 atm.

Inhibiting sorbent stripping by designing a sorbent-packed porous probe for headspace solid-phase microextraction

Co-reporter:Shuai Qin;Gu Tao;Huang Yunjie;Xu Shuangshuang;Li Luyan;Xiao Hongyan

Journal of Separation Science 2015 Volume 38( Issue 20) pp:3582-3587

Publication Date(Web):

DOI:10.1002/jssc.201500370

To prevent the stripping of coating sorbents in headspace solid-phase microextraction, a porous extraction probe with packed sorbent was introduced by using a porous stainless steel needle tube and homemade sol–gel sorbents. The traditional stainless-steel needle tube was punched by a laser to obtain two rows of holes, which supply a passageway for analyte vapor during extraction and desorption. The sorbent was prepared by a traditional sol–gel method with both poly(ethylene glycol) and hydroxy-terminated silicone oil as coating ingredients. Eight polycyclic aromatic hydrocarbons and six benzene series compounds were used as illustrative semi-volatile and volatile organic compounds in sequence to verify the extraction performance of this porous headspace solid-phase microextraction probe. It was found that the analysis method combining a headspace solid-phase microextraction probe and gas chromatography with mass spectrometry yielded determination coefficients of no less than 0.985 and relative standard deviations of 4.3–12.4%. The porous headspace solid-phase microextraction probe showed no decrease of extraction ability after 200 uses. These results demonstrate that the packed extraction probe with porous structure can be used for headspace solid-phase microextraction. This novel design may overcome both the stripping and breakage problems of the conventional coating fiber.

Determination of fatty acids in soil samples by gas chromatography with mass spectrometry coupled with headspace solid-phase microextraction using a homemade solgel fiber

Co-reporter:Qin Shuai;Xiaoxiao Ding;Yunjie Huang;Shuangshuang Xu;Shengrui Xu;Qiang Gao;Haidong Deng

Journal of Separation Science 2014 Volume 37( Issue 22) pp:3299-3305

Publication Date(Web):

DOI:10.1002/jssc.201400468

Through the use of a homemade sol–gel-derived fiber, a headspace solid-phase microextraction technique coupled to gas chromatography with mass spectrometry 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 ionic strength that might affect derivatization, extraction, and desorption were investigated. Under the optimized conditions, the linearity of the method ranged from 0.1 to 100 mg/L with a correlation coefficient >0.997. The limit of detection values based on a signal-to-noise ratio of 3:1 were determined with the concentration from 0.39 to 39.4 μg/L. The recoveries of the method for the soil samples were from 91.15 to 108.1%. This developed method using a homemade fiber showed a higher sensitivity than that using a commercial polydimethylsiloxane fiber and was also for the analysis of real soil samples from the Paomaling geological park of China.

Se Capture by a CaO-ZnO Composite Sorbent during the Combustion of Se-Rich Stone Coal

Co-reporter:Shengrui Xu, Qin Shuai, Yunjie Huang, Zhengyu Bao, and Shenghong Hu

Energy & Fuels 2013 Volume 27(Issue 11) pp:6880-6886

Publication Date(Web):October 23, 2013

DOI:10.1021/ef4013449

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 by Se-rich stone coal combustion over the temperature range of 700–1000 °C during laboratory scale testing. It was found that these composite materials, especially those containing ZnO and Fe3O4, exhibited higher adsorption efficiency than pure CaO. The highest adsorption efficiency of 95.46% was obtained with the CaO-ZnO composite sorbent under optimized experimental conditions. FT-IR and X-ray diffraction results indicated that the adsorbed Se was predominantly in the form of CaSeO3, with a minor amount of ZnSeO3. Both the formation of ZnSeO3 and the enhanced reaction interface contribute to the higher adsorption of Se on the CaO-ZnO composite sorbent as compared with pure CaO. These newly developed CaO-ZnO composite materials show potential as sorbents for the capture and recovery of Se during industrial-scale Se-rich stone coal combustion.