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Hybrid peroxi-coagulation/ozonation process for highly efficient removal of organic contaminants

Chinese Chemical Letters 2023年第10期34卷 86-92页

作者： shasha Li Jinxin Xie Jinyu Gu Minghua zhou Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Tianjin Advanced Water Treatment Technology International Joint Research Center College of Environmental Science and EngineeringNankai UniversityTianjin 300350China

Aromatic compounds such as phenols presented widely in coal chemical industry wastewater(CCW)render the treatment facing great challenge due to their biorefractory characteristics and potential risks to the environment and human health.Ozone-based advanced oxidation processes show promising for these pollutants removal,but the mineralization via ozonation alone is unsatisfactory and not cost-effective.Herein,a hybrid peroxi-coagulation/ozonation process(denoted as PCO)was developed using sacrificial iron plate as an anode and carbon black modified carbon felt as cathode in the presence of ozonation.An enhanced phenol removal of∼100%within 20 min and phenol mineralization of∼80%within 60 min were achieved with a low energy consumption of 0.35 kWh/g TOC.In this novel process,synergistic effect between ozonation and peroxi-coagulation was observed,and beside O_(3) direct oxidation,peroxone played a dominant role for phenol removal.In the PCO process,the hydrolyzed Fe species enhanced the generation of reactive oxygen species(ROS),while•OH was dominantly responsible for pollutant degradation.This process also illustrated high resistance to high ionic strength and better performance for TOC removal in real wastewater when compared with ozonation and peroxi-coagulation process.Therefore,this process is more cost-effective,being very promising for CCW treatment.

关键词： Coal chemical industry wastewater Phenol removal Catalytic ozonation Peroxi-coagulation Reactive oxygen species

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Sequentially immune-induced antibodies could cross-neutralize SARS-CoV-2 variants

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Animal Models and Experimental Medicine 2022年第1期5卷 89-93页

作者： Qi Lv Shasha Zhou Feifei Qi Yaqing Zhang Fengdi Li Mingya Liu Linlin Bao Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious Diseases NHC Key Laboratory of Human Disease Comparative MedicineInstitute of Laboratory Animal ScienceChinese Academy of Medical Sciences and Comparative Medicine CenterPeking Union Medical CollegeBeijingChina National Center of Technology Innovation for Animal Model BeijingChina

Background:The Omicron(B.1.1.529)SARS-COV-2 variant has raised serious concerns because of its unprecedented rapid rate of spreading and the fact that there are 36 mutations in the spike protein.Since the vaccine-induced neutralizing antibody targets are the spike protein,this may lead to the possibility of vaccine-induced hu-moral immunity escape.Methods:We measured the neutralizing activity in vitro for Omicron and compared this with wild type(WH-09)and Delta variants in human and monkey sera from different types of immunity.The monkey sera samples were collected at 1 and 3 months post three-dose inactivated(PiCoVacc)and recombinant protein(ZF2001)vaccination.Human sera were collected from 1 month post three-dose inactivated vaccination.Results:In inactivated vaccine sera,at 1/3 months post three-dose,geometric mean titers(GMTs)of neutralization antibody(NAb)against the Omicron variant were 4.9/5.2-fold lower than those of the wild type.In recombinant protein vaccine sera,GMTs of NAb against Omicron were 15.7/8.9-fold lower than those of the wild type.In human sera,at 1 month post three-dose inactivated vaccination,GMTs of NAb against Omicron were 3.1-fold lower than those of the wild type.Conclusion:This study demonstrated that despite a reduction in neutralization titers,cross-neutralizing activity against Omicron and Delta variants was still observed after three doses of inactivated and recombinant protein vaccination.

关键词： cross-neutralize Omicron SARS-CoV-2 sequentially immune

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Space-confined vapor deposition synthesis of two dimensional materials

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Nano Research 2018年第6期11卷 2909-2931页

作者： Shasha Zhou Lin Gan Deli Wang Huiqiao Li Tianyou Zhai School of Materials Science and Engineering School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 China

Two dimensional （2D） nanomaterials are promising fundamental building blocks for use in the next-generation semiconductor industry due to their unique geometry and excellent （opto）-electronic properties. However, large scale high quality fabrication of 2D nanomaterials remains challenging. Thus, the development of controllable fabrication methods for 2D materials is essential for their future practical application. In this review, we will discuss the importance of the space-confined vapor deposition strategy in the controllable fabrication of 2D materials and summarize recent progress in the utilization of this strategy for the synthesis of novel materials or structures. Using this method, various high quality ultrathin 2D materials, including large-area graphene and boron nitride, ReS2/ReSe2 HfS2, pyramid-structured multilayer MoS2, and the topological insulators BiaSe3 and BiaTe3, have been successfully obtained. Additionally, by utilizing van der Waals epitaxy growth substrates such as mica or other 2D materials, patterned growth of 2D nanomaterials can be easily achieved via a surface-induced growth mechanism. Finally, we provide a short prospect for future development of this strategy.

关键词： two dimensional vapor deposition space confinement transition metaldichalcogenides

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Approaching ohmic contact to two-dimensional semiconductors

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Science Bulletin 2019年第19期64卷 1426-1435页

作者： Kailang Liu Peng Luo Wei Han Sanjun Yang Shasha Zhou Huiqiao Li Tianyou Zhai State Key Laboratory of Material Processing and Die & Mould Technology School of Material Sciences and Engineering Huazhong University of Science and Technology

Two-dimensional semiconductors have attracted immense research interests owing to their intriguing properties and promising applications in electronic and optoelectronic devices.However,the performance of these devices is drastically hindered by the large Schottky barrier at the electric contact interface,which is hardly tunable due to the Fermi level pinning effect.In this review,we will analyze the root causes of the contact problems for the two-dimensional semiconductor devices and summarize the strategies on the basis of different contact geometries,aiming to lift out the Fermi level pinning effect and achieve the ohmic contact.Moreover,the remarkable improvement of the device performance thanks to these optimized contacts will be emphasized.At the end,the merits and limitations of these strategies will be discussed as well,which potentially gives a guideline for handling the electric contact issues in two-dimensional semiconductors devices.

关键词： Two-dimensional semiconductor Ohmic contact Fermi level pinning Schottky barrier

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Sensitivity of SARS-CoV-2 to different temperatures

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Animal Models and Experimental Medicine 2020年第4期3卷 316-318页

作者： Qi Lv Mingya Liu Feifei Qi Shuran Gong Shasha Zhou Shisheng Zhan Linlin Bao Key Laboratory of Human Disease Comparative Medicine Chinese Ministry of HealthBeijing Key Laboratory for Animal Models of Emerging and Remerging Infectious DiseasesInstitute of Laboratory Animal ScienceChinese Academy of Medical Sciences and Comparative Medicine CenterPeking Union Medical CollegeBeijingChina

This study was designed to investigate the sensitivity of SARS-CoV-2 to different temperatures,to provide basic data and a scientific basis for the control of COVID-19 epidemic.The virus was dispersed in 1 mL basal DMEM medium at a final concentration of 103.2 TCID 50/mL and then incubated at 4,22,30,35,37,38,39 and 40°C for up to 5 days.The infectivity of residual virus was titrated using the Vero E6 cell line.The results showed that the virus remained viable for 5 days at 4°C,and for 1 day only at 22 and 30°C.We found that the infectivity of the virus was completely lost after less than 12 hours at 37,38 and 39°C,while at 40°C,the inactivation time of the virus was rapidly reduced to 6 hours.We show that SARS-CoV-2 is sensitive to heat,is more stable at lower temperatures than higher temperature,remains viable for longer at lower temperatures,and loses viability rapidly at higher temperatures.

关键词： SARS-CoV-2 sensitivity temperature viability

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Graptolite-Derived Organic Matter and Pore Characteristics in the Wufeng-Longmaxi Black Shale of the Sichuan Basin and its Periphery

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 982-995页

作者： WU Jin zhou Wen SUN shasha zhou Shangwen SHI Zhensheng State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059SichuanChina Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China National Energy Shale Gas R&D(Experiment)Centre Langfang 065007HebeiChina PetroChina Unconventional Oil&Gas Key Laboratory Langfang 065007HebeiChina

A key target of shale gas exploration and production in China is the organic-rich black shale of the Wufeng Formation-Longmaxi Formation in the Sichuan Basin and its periphery.The set of black shale contains abundant graptolites,which are mainly preserved as flattened rhabdosomes with carbonized periderms,is an important organic component of the shale.However,few previous studies had focused on the organic matter(OM)which is derived from graptolite and its pore structure.In particular,the contributions of graptolites to gas generation,storage,and flow have not yet been examined.In this study,focused ion beam-scanning electron microscope(FIB-SEM)was used to investigate the characteristics of the graptolite-derived OM and the micro-nanopores of graptolite periderms.The results suggested that the proportion of OM in the graptolite was between 19.7%and 30.2%,and between 8.9%and 14.4%in the surrounding rock.The total organic carbon(TOC)content of the graptolite was found to be higher than that of the surrounding rock,which indicated that the graptolite played a significant role in the dispersed organic matter.Four types of pores were developed in the graptolite periderm,including organic gas pores,pyrite moulage pores,authigenic quartz moldic pores,and microfractures.These well-developed micro-nano pores and fractures had formed an interconnected system within the graptolites which provided storage spaces for shale gas.The stacked layers and large accumulation of graptolites resulted in lamellation fractures openning easily,and provided effective pathways for the gas flow.A few nanoscale gas pores were observed in the graptolite-derived OM,with surface porosity lie in 1.5%–2.4%,and pore diameters of 5–20 nm.The sapropel detritus was determined to be rich in nanometer-sized pores with surface porosity of 3.1%–6.2%,and pore diameters of 20–80 nm.Due to the small amount of hydrocarbon generation of the graptolite,supporting the overlying pressure was difficult,which caused the pores to become compacted or collapsed.

关键词： graptolite pore structure shale gas Wufeng-Longmaxi Formations Sichuan Basin

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On a class of almost regular Landsberg metrics

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Science China Mathematics 2019年第5期62卷 935-960页

作者： Shasha Zhou Jiayue Wang Benling Li Department of Mathematics Ningbo University

There is a long existing "unicorn" problem in Finsler geometry: whether or not any Landsberg metric is a Berwald metric? Some classes of metrics were studied in the past and no regular non-Berwaldian Landsberg metric was found. However, if the metric is almost regular(allowed to be singular in some directions),some non-Berwaldian Landsberg metrics were found in the past years. All of them are composed by Riemannian metrics and 1-forms. This motivates us to ?nd more almost regular non-Berwaldian Landsberg metrics in the class of general(α, β)-metrics. In this paper, we ?rst classify almost regular Landsberg general(α, β)-metrics into three cases and prove that those regular metrics must be Berwald metrics. By solving some nonlinear PDEs,some new almost regular Landsberg metrics are constructed which have not been described before.

关键词： Finsler metric Landsberg metric Berwald metric (α,β)-metric

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A bifunctional MnO_x@PTFE catalytic membrane for efficient low temperature NO_x-SCR and dust removal

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Chinese Journal of Chemical Engineering 2020年第5期28卷 1260-1267页

作者： shasha Feng Mengdi zhou Feng Han Zhaoxiang Zhong Weihong Xing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for Special Separation MembraneNanjing Tech UniversityNanjing 210009China Nanjing Industrial Technology Research Institute of Membrane Material Co.Ltd. Nanjing 211100China

Low-temperature selective catalytic reduction of NOx combined with dust removal technique due to its energy conservation characteristic has been attracted much attention for fume purification.In this work,the MnOx wrapped PTFE membrane with efficient dust removal and low-temperature NH3-SCR has been prepared with a facile route.MnOxwith different crystal structures was uniformly grown around the PTFE fibrils through water bath.The flower-sphere-like MnOx@PTFE(O-MnOx@PTFE)and lamellar-interlaced ripple-like MnOx@PTFE(W-MnOx@PTFE)have large specific surface area which is favorable for enhancing catalytic performance.Also,the uniformly wrapped W-MnOxaround the PTFE fibrils optimized the pore structure for ultrafine dust capture.The membrane can almost 100%reject particles that are smaller than 1.0μm with a low filtration resistance.Meanwhile,W-MnOx@PTFE with more surface chemisorbed oxygen has the best NO conversion efficiency of 100%at a comparatively low and wide activity temperature window of 160–210°C,which is far to the thermal limitation of the PTFE.Therefore,this efficient and energy conserving membrane has a bright application prospects for tail gas treatment compared to the original treatment process.

关键词： MnO_x PTFE Catalytic membrane Low-temperature SCR

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Meltblown fabric vs nanofiber membrane, which is better for fabricating personal protective equipments

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Chinese Journal of Chemical Engineering 2021年第8期34卷 1-9页

作者： Junwei Wu Hongjia zhou Jingyi zhou Xiao Zhu Bowen Zhang shasha Feng Zhaoxiang Zhong Lingxue Kong Weihong Xing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for Special Separation MembraneNanjing Tech UniversityNanjing 210009China Jiangsu Jiulang High-Tech Co. LtdNanjing 210009China Department of Material and Chemical Engineering Soochow UniversitySuzhou 215006China Institute for Frontier Materials Deakin UniversityGeelongVictoria 3216Australia

The coronavirus disease 2019(COVID-19)pandemic has led to a great demand on the personal protection products such as reusable masks.As a key raw material for masks,meltblown fabrics play an important role in rejection of aerosols.However,the electrostatic dominated aerosol rejection mechanism of meltblown fabrics prevents the mask from maintaining the desired protective effect after the static charge degradation.Herein,novel reusable masks with high aerosols rejection efficiency were fabricated by the introduction of spider-web bionic nanofiber membrane(nano cobweb-biomimetic membrane).The reuse stability of meltblown and nanofiber membrane mask was separately evaluated by infiltrating water,75%alcohol solution,and exposing under ultraviolet(UV)light.After the water immersion test,the filtration efficiency of meltblown mask was decreased to about 79%,while the nanofiber membrane was maintained at 99%.The same phenomenon could be observed after the 75%alcohol treatment,a high filtration efficiency of 99%was maintained in nanofiber membrane,but obvious negative effect was observed in meltblown mask,which decreased to about 50%.In addition,after long-term expose under UV light,no filtration efficiency decrease was observed in nanofiber membrane,which provide a suitable way to disinfect the potential carried virus.This work successfully achieved the daily disinfection and reuse of masks,which effectively alleviate the shortage of masks during this special period.

关键词： Filtration efficiency Meltblown fabrics Nano cobweb-biomimetic membrane Reusable mask

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A new species of the genus Tylototriton (Amphibia: Urodela: Salamandridae) from the Eastern Dalou Mountains in Guizhou, China

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Zoological Systematics 2022年第1期47卷 66-88页

作者： Tao Luo shasha Yan Ning Xiao Wei Li Huaiqing Deng Jiang zhou School of Karst Science Guizhou Normal UniversityGuiyang 550001China School of Life Sciences Guizhou Normal UniversityGuiyang 550001China Guiyang Nursing Vocational College Guiyang 550003China

A new newt species,Tylototriton daloushanensis zhou,Xiao&Luo,sp.nov.,is described from Guizhou,China,based on phylogenetic and morphological analyses.Phylogenetic analyses based on mitochondrial 16S and ND2 genes show that the new species is an independent lineage closely related to T.maolanensis,T.broadoridgus,T.dabienicus,T.anhuiensis,and T.wenxianensis.Morphologically,the new species is distinguished from its congeners by a combination of the following morphological characters:(1)large body size(SVL 64.7–83.6 mm in male and 70.5–100.3 mm in female);(2)head longer than wide,prominent bony ridges present;(3)snout rounded in dorsal view;(4)tail length less than snoutvent length in both males and females;(5)dark black body coloration,except for bright orange cranial region,palms and soles,vent region,and ventral ridge of tail;(6)relative length of toes Ⅲ>Ⅳ>Ⅱ>Ⅰ>Ⅴ;(7)fingertips reaching to between the eyes and nostrils when the forelimbs are stretched forward;(8)distal tip of the limbs greatly overlapping when the fore and hind limbs are pressed along the trunk;(9)presence of gular fold;(10)vertebral ridge slightly segmented,slightly flattened rib nodules,indistinct interspaces between rib nodules;and(11)lacking orange color markings on posterior parotoids and rib nodules.The found of the new species suggests that the species diversity of the genus Tylototriton may be underestimated.

关键词： Asian knobby newts systematics cryptic species taxonomy

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