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Synergistic effect of Pt nanoparticles and micro-mesoporous ZSM-5 in VOCs low-temperature removal

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Journal of Environmental Sciences 2021年第9期33卷 87-97页

作者： Jialu Wang Xiaolin Guo Yijun Shi Renxian Zhou Institute of Catalysis Zhejiang UniversityHangzhou 310028China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018China

Micro-mesoporous ZSM-5 zeolites were obtained by the post-treatment of tetrahydroxy ammonium hydroxide(TPAOH) solution with different concentration.The hierarchical pore structure formed during the desilication process facilitates the dispersion of Pt nanoparticles and Pt/ZSM-5 catalysts exhibit rather high catalytic activity for the deep oxidation of various VOCs at low temperature.The catalyst treated with TPAOH of 0.1 mol/L(Pt/ZSM-5(0.1)) shows the lowest degradation temperature(T90%) of 128 and 142℃, respectively for benzene and n-hexane.Compared with the untreated Pt/ZSM-5 catalyst, the abundant mesopores, small Pt particle size and finely dispersed Pt contribute to the superior catalytic activity and stability of the Pt/ZSM-5 catalysts for VOCs removal.More importantly, the existence of H_(2)O in the feed gases hardly affected the activity of Pt/ZSM-5(0.1) catalyst at the low reaction temperature of 128℃, which is very important for VOCs low-temperature removal in the future practical applications.

关键词： Pt/ZSM-5 catalysts Micro-mesoporous ZSM-5 VOC oxidation Synergistic effect

High activity of CeO2-TiO2 composites for deep oxidation of 1,2-dichloroethane

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Journal of Rare Earths 2020年第8期38卷 906-911,I0003页

作者： Jialu Wang Zhinan Shi Renxian Zhou Institute of Catalysis Zhejiang UniversityHangzhou 310028PR China

CeO2-TiO2 catalysts prepared by different methods were investigated for deep oxidation of 1,2-dichloroethane(DCE),as a typical representative of the chlorinated volatile organic compounds(CVOCs).Characterization analysis reveals that CeO2-TiO2 catalysts prepared by sol-gel and coprecipitation methods exhibit higher specific area,CeO2 and TiO2 particles are highly dispersed into each other and the reducibility and mobility of active oxygen species are obviously promoted due to the strong interaction between the two catalysts CeO2 and TiO2,resulting in higher catalytic activity for DCE oxidation to and less chlorinated byproduct.The high calcination temperature would lead to the formation of a new monoclinic phase Ce0.3Ti0.7O2 and sintering,which is the main reason for the catalytic activity for DCE oxidation markedly decreases.

关键词： CeO2-TiO2 catalysts Synergism Chlorinated VOCs Catalytic oxidation Rare earths

Highly ordered Nb_(2)O_(5)nanochannel film with rich oxygen vacancies for electrocatalytic N2 reduction:Inactivation and regeneration of electrode

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Chinese Chemical Letters 2021年第9期32卷 2833-2836页

作者： Jialu Wang Shenghong Kang Xiaoguang Zhu Guozhong wang Haimin Zhang Key Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsAnhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China

We report the fabrication of highly ordered Nb_(2)O_(5)nanochannel film(Nb_(2)O_(5)-NCF)onto niobium foil by an anodization method.After thermal treatment,the obtained Nb_(2)O_(5)-NCF with rich oxygen vacancies exhibits electrochemical N_(2)reduction reaction(NRR)activity with an NH3 yield rate of 2.52×10^(-10)mol cm^(-2)s^(-1)and a faradaic efficiency of 9.81%at-0.4 V(vs.RHE)in 0.1 mol/L Na2SO4 electrolyte(pH 3.2).During electrocatalytic NRR,the Nb_(2)O_(5)-NCF takes place electrochromism(EC),along with a crystalline phase transformation from pseudo hexagonal phase to hexagonal phase owing to H+insertion.This results in the reduced NRR activity due to the decrease of oxygen vacancies of hexagonal phase Nb_(2)O_(5),which can be readily regenerated by low-temperature thermal treatment or applying an anodic potential,showing superior recycling reproducibility.

关键词： Niobium oxide(Nb_(2)O_(5)) Nitrogen(N_(2))reduction reaction(NRR) Electrochromism Oxygen vacancies Phase transformation

Huge permittivity and premature metallicity in Bi2O2Se single crystals

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Science China(Physics,Mechanics & Astronomy) 2021年第6期64卷 90-97页

作者： ZhuoKai Xu Jialu Wang Tao wang wangHua Hu XiaoHui Yang Xiao Lin Deparment of Physics Zhejiang UniversiyHangzhou 310027China Key Laboratory for Quantum Materials of Zhejiang Province School of ScienceWestlake UniversityHangzhou 310024China Institute of Natural Sciences Westlake Instiute for Advanced StudyHangzhou 310024China

Bi_(2)O_(2) Se is a promising material for next-generation semiconducting electronics.It exhibits premature metallicity on the introduction of a tiny amount of electrons,the physics behind which remains elusive.Here we report on transport and dielectric measurements in Bi_(2)O_(2) Se single crystals at various carrier densities.The temperature-dependent resistivity(p)indicates a smooth evolution from the semiconducting to the metallic state.The critical concentration for the metal-insulator transition(MIT)to occur is extraordinarily low(nc~10^(16) cm^(-3)).The relative permittivity of the insulating sample is huge(∈r≈155(10))and varies slowly with temperature.Combined with the light effective mass,a long effective Bohr radius(a_(B)^(*)≈36(2)nm)is derived,which provides a reasonable interpretation of the metallic prematurity according to Mott’s criterion for MITs.The high electron mobility(μ)at low temperatures may result from the screening of ionized scattering centers due to the huge∈r.Our findings shed light on the electron dynamics in two dimensional(2D)Bi_(2)O_(2) Se devices.

关键词： next-generation semiconductor Bi_(2)O_(2)Se metal-insulator transition premature metallicity huge permittivity Mott’s criterion

Physiological and transcriptional responses to heat stress in a typical phenotype of Pinellia ternata

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Chinese Journal of Natural Medicines 2023年第4期21卷 243-252页

作者： wang jialu CHEN Jialei ZHANG Xiangyu FENG Xue LI Xiwen Institute of Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing 100700China College of Medicine Henan University of Chinese MedicineZhengzhou 450046China Bijie Institute of Traditional Chinese Medicine Bijie 551700China

Pinellia ternata is an important medicinal plant,and its growth and development are easily threatened by high temperature.In this study,comprehensive research on physiological,cytological and transcriptional responses to different levels of heat stress were conducted on a typical phenotype of P.ternata.First,P.ternata exhibited tolerance to the increased temperature,which was supported by normal growing leaves,as well as decreased and sustained photosynthetic parameters.Severe stress aggravated the damages,and P.ternata displayed an obvious leaf senescence phenotype,with significantly increased SOD and POD activities(46%and 213%).In addition,mesophyll cells were seriously damaged,chloroplast thylakoid was fuzzy,grana lamellae and stroma lamellae were obviously broken,and grana thylakoids were stacked,resulting in a dramatically declined photosynthetic rate(74.6%).Moreover,a total of 16808 genes were significantly differential expressed during this process,most of which were involved in photosynthesis,transmembrane transporter activity and plastid metabolism.The number of differentially expressed transcription factors in MYB and bHLH families was the largest,indicating that these genes might participate in heat stress response in P.ternata.These findings provide insight into the response to high temperature and facilitate the standardized cultivation of P.ternata.

关键词： Pinellia ternata Heat stress SOD and POD activities Photosynthetic rate Chloroplast Transcriptional response

FBXO38 regulates macrophage polarization to control the development of cancer and colitis

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Cellular & Molecular Immunology 2023年第11期20卷 1367-1378页

作者： Xin Zheng Qi Jiang Mingshun Han Fenfen Ye Mingchang wang Ying Qiu Jialu Wang Minxia Gao Fajian Hou Hongyan wang School of Life Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou310024China State Key Laboratory of Cell Biology Shanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai200031China

Macrophages are highly plastic cells that differentially regulate multiple pathological conditions,including cancer and autoimmune diseases.In response to various stimuli,macrophages activate different intrinsic signaling pathways and polarize into distinct macrophage subsets.We aimed to identify key new effectors that could control macrophage polarization and impact the development of cancer or colitis.Following treatment with the supernatants of tumor cells,macrophages showed an upregulation in Fbxo38 expression.Subsequently,we further identified that FBXO38 promotes macrophage immunosuppressive function by upregulating the expression of M2-like genes via MAPK and IRF4 signaling without affecting M1-like macrophage polarization.Deletion of Fbxo38 in macrophages was found to block tumor development and protect against DSS-induced colitis.Considering the distinct regulation of tumor development by FBXO38 in T cells and macrophages,we suggest that a comprehensive understanding of FBXO38 function in different cell types is critical for its further translational usage.

关键词： FBXO38 Macrophage polarization Tumor progression Colitis

The short and long-term effect of polystyrene nanoplastics on nitrifying sludge at high nitrite concentrations

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Journal of Environmental Sciences 2024年第1期135卷 222-231页

作者： Xiaolong wang jialu Huang Zhiqiang Qi Ruiqin Kang Chao Du Da Li School of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000China Henan Licheng Environmental Technology Co. Ltd.Anyang 455000China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

The effect of nanoplastics(NPs)on nitrite oxidation bacteria(NOB)community in treating high-strength wastewater remains unclear,which seriously affects the stability of nitrogen removal process.In this study,highly active nitrifying sludge was enriched and exposed to 50nm polystyrene NPs(PS-NPs)for short-term(1,100,500,and 1000 mg/L,1.5 hr)and long-term(1,10,100 mg/L,40 days)at high nitrite concentration.In contrast to previous studies,our results showed that the exposures to PS-NPs had little effect on nitrifying performances.After long-term exposure,the protein/polysaccharide ratios in extracellular polymeric substances(EPS)were positively correlated with PS-NPs concentrations(0.78–0.99).The produced reactive oxygen species(ROS)were gradually removed,and PS-NPs higher than 10 mg/L caused damage to membrane integrity.Long-term exposure for 40 days increased the community diversity and caused significant differences between the control and exposed communities.The control group were dominated by Nitrobacter and Exiguobacterium,while the exposure group was dominated by Bacillus,Mycobacterium,and Nitrospira.A noticeable shift in the NOB community from Nitrobacter(26.5%to 3.4%)to Nitrospira(1.61%to 14.27%)was observed.A KEGG analysis indicated a decrease in cell growth and death,cell motility and energy metabolism.It appeared that NOB could adapt to PS-NPs stress through enhanced secretion and removal of oxidative damage.Overall,this study provided new insights into the response mechanism of NOB to PS-NPs exposure.

关键词： Nanoplastics Nitrifying activity Extracellular polymeric substance(EPS) Exposure Community analysis

C1M2:a universal algorithm for 3D instance segmentation,annotation,and quantification of irregular cells

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Science China(Life Sciences) 2023年第10期66卷 2415-2428页

作者： Hao Zheng Songlin Huang Jing Zhang Ren Zhang Jialu Wang Jing Yuan Anan Li Xin Yang Zhihong Zhang Britton Chance Center and MOE Key Laboratory for Biomedical Photonics Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Biomedical Engineering of Hainan Province School of Biomedical EngineeringHainan UniversityHaikou 570228China School of Electronic Information and Communications Huazhong University of Science and TechnologyWuhan 430074China

Cell instance segmentation is a fundamental task for many biological applications,especially for packed cells in three-dimensional(3D)microscope images that can fully display cellular morphology.Image processing algorithms based on neural networks and feature engineering have enabled great progress in two-dimensional(2D)instance segmentation.However,current methods cannot achieve high segmentation accuracy for irregular cells in 3D images.In this study,we introduce a universal,morphology-based 3D instance segmentation algorithm called Crop Once Merge Twice(C1M2),which can segment cells from a wide range of image types and does not require nucleus images.C1M2 can be extended to quantify the fluorescence intensity of fluorescent proteins and antibodies and automatically annotate their expression levels in individual cells.Our results suggest that C1M2 can serve as a tissue cytometry for 3D histopathological assays by quantifying fluorescence intensity with spatial localization and morphological information.

关键词： 3D instance segmentation irregular cells fluorescence images neural networks fluorescence intensity tissue cytometry

Microscopic morphology evolution of the crystal structure of tetrahydrofuran hydrate under flowing condition

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Chinese Journal of Chemical Engineering 2022年第5期35卷 103-110页

作者： jialu Zhang Xiang Liu Shuai Liu Yuxing Li Qihui Hu Wuchang wang Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of Petroleum(East China)Qingdao 266580China State Key Loboratory of Natural Gas Hydrates Beijing 100028China

The evolution of the hydrate particle structure during growth and agglomeration under flowing condition affects the particle as well as flow characteristic,which plays an important role in the flow assurance as well as heat transfer in refrigeration systems.Therefore,this article conducts experiments to study and observe the growth and agglomeration process in the main forming stage of hydrate.It was found that the growth of tetrahydrofuran hydrate was anisotropic and in a layered growth pattern.Single crystals generally transformed from octahedral structure to octahedral skeleton structure with growth,however some single crystals also deformed into plate type particles.The thickness of the plate type particles increased gradually during growth,and the edge part increased earlier than the middle part.During agglomeration,the hydrate particles contacted and sintered together.Sand as the impurity didn’t serve as the nucleation center but affected the agglomeration of hydrate particles by collisions.In addition,the effect increased as the sand size decreased.Finally,a microstructure model for hydrate growth and agglomeration was proposed,which showed the hydrate structure evolution in these processes and could lay a foundation for studying the flow assurance of hydrate slurry.

关键词： Tetrahydrofuran hydrate Growth Agglomeration Morphology Microstructure Microstructure model