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Preparation of floating BiOCl_(0.6)I_(0.4)/ZnO photocatalyst and its inactivation of Microcystis aeruginosa under visible light

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Journal of Environmental Sciences 2023年第3期125卷 362-375页

作者： Hong Liu Liuliu Yang Houwang Chen meng Chen Peng Zhang ning Ding School of Environmental Science and Engineering Jiangsu Key Laboratory of Environmental Science and TechnologySuzhou University of Science and TechnologySuzhou 215009China Key Laboratory of Cleaner Production and Comprehensive Utilization of Resources China National Light IndustryDepartment of Environmental Science and EngineeringBeijing Technology and Business UniversityBeijing 100048China

Frequent occurrence of harmful algal blooms has already threatened aquatic life and human *** the present study,floating BiOCl_(0.6)I_(0.4)/ZnO photocatalyst was synthesized in situ by water bath method,and and applied in inactivation of Microcystis aeruginosa under visible *** composition,morphology,chemical states,optical properties of the photocatalyst were also *** results showed that BiOCl_(0.6)I_(0.4)exhibited laminated nanosheet structure with regular shape,and the light response range of the composite BZ/EP-3 (BiOCl_(0.6)I_(0.4)/ZnO/EP-3) was tuned from 582 to 638 *** results of photocatalytic experiments indicated that BZ/EP-3 composite had stronger photocatalytic activity than a single BiOCl_(0.6)I_(0.4)and ZnO,and the removal rate of chlorophyll a was 89.28%after 6 hr of photocatalytic *** photosynthetic system was destroyed and cell membrane of algae ruptured under photocatalysis,resulting in the decrease of phycobiliprotein components and the release of a large number of ions (K^(+),Ca^(2+)and Mg^(2+)).Furthermore,active species trapping experiment determined that holes (h+) and superoxide radicals (·O_(2)-) were the main active substance for the inactivation of algae,and the p-n mechanism of photocatalyst was ***,BZ/EP-3 showed excellent algal removal ability under visible light,providing fundamental theories for practical algae pollution control.

关键词： BiOCl_(0.6)I_(0.4)/ZnO Visible light Photocatalysis Algae removal

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Room-temperature chlorine gas sensor based on CdSnO_(3) synthesized by hydrothermal process

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Journal of Advanced Ceramics 2013年第1期2卷 31-36页

作者： Xiaohua ZHAO Zhenzhen LI Xiangdong LOU meng LI ning ZHANG School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

The perovskite-structure CdSnO_(3) was obtained by calcinating CdSnO_(3)·3H_(2)O precursor at 550℃,which was synthesized by hydrothermal process at 170℃for 16 *** phase and microstructure of the obtained CdSnO_(3) powders were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The CdSnO_(3) powders exhibit uniformly cubic structure with side length of about 100 *** effects of working temperature and concentration of detected gas on the gas response were *** selectivity of chlorine gas against other gases and response-recovery time of the sensor were also *** results reveal that the CdSnO_(3) gas sensor has enhanced sensing properties to 1-10 ppm chlorine gas at room temperature;the value of gas response can reach 1338.9 to 5 ppm chlorine ***,the sensor shows good selectivity and quick response behavior(23 s)to chlorine gas,indicating its application in detecting chlorine gas at room temperature in the future.

关键词： chlorine gas sensor room temperature CdSnO_(3) hydrothermal process

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Filter paper-templated preparation of ZnO thin films and examination of their gas-sensing properties

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Particuology 2011年第3期9卷 253-259页

作者： Bao Wang ning Han Dong meng Renliang Yue Jinghui Yan Yunfa Chen School of Chemistry and Environmental Engineering Changchun University of Science and Technology Changchun 130022 China Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

ZnO thin films prepared by using quantitative filter paper as a template and Zn（CH3CO2）2.2H2O ethanol precursor solution were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The effects of sample calcination temperature, precursor concentration and filter paper types were studied, and the growth process was investigated by infra-red （IR） spectroscopy and thermogravimettic analysis/differential thermal analysis （TGA/DTA）. The results show that samples soaked in a 1.5 mol/L Zn（CH3 CO2）2.2H2O ethanol solution and calcined at 600 ℃ yield ZnO films of uniform particle size, approximately 30, 40 and 50 nm. for fast-, medium- and slow-speed filter papers, respectively. The formaldehyde gas sensing properties of the ZnO nanoparticles were tested, showing that the material prepared from fast-speed filter paper has a higher response to 120-205 ppm formaldehyde at 400 ℃ than that prepared from medium- or slow-sneed paper, which depends on the narticle size.

关键词： ZnO thin films Quantitative filter paper Template Gas sensing properties

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Sphalerite/silica interaction:Zeta potential distribution measurement

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Rare Metals 2016年第9期35卷 729-734页

作者： Hao Ren meng-Qi Ren Zhen Li Jing ning Yu-Fen Zhang Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong School of Chemistry and Chemical EngineeringUniversity of Jinan School of Chemical Engineering and Technology Tianjin University

An appropriate measurement is needed to control the calcium ion content and reduce the interaction among fine mineral *** this paper,the sphalerite/silica interactions were studied by Zeta potential measurements and a novel Zeta potential distribution（ZPD）measurement method in different concentrations of calcium ion *** study mineral surface molecular and atomic absorption states,energy dispersive spectroscopy（EDS） and scanning electron microscope（SEM） were *** reagent adsorbed on the mineral surface was analyzed by the interactions *** results show that adsorption of flotation reagent is not conducive when the calcium ion concentration is high in the *** the calcium ion concentration is the effective method to reduce particle interactions in the *** specific method is that the appropriate amount of sodium carbonate is added into the gypsum-supersaturated *** minerals＇ interactions can be interpreted by measuring ZPD.

关键词： Sphalerite Silica Interaction Zeta potential distribution Flotation reagent

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Mechanism of the reconstruction of aqueous outflow drainage

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Science China(Life Sciences) 2018年第5期61卷 534-540页

作者： Chen Xin ning Tian meng Li Huaizhou Wang ningli Wang Beijing Institute of Ophthalmology Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing 100005 China Department of ophthalmology Beo'ing Anzhen Hospital Capital Medical University Beijing 100029 China

Glaucoma is the leading cause of irreversible blindness worldwide. The reconstruction of aqueous outflow drainage (RAOD) has recently been proposed to aid in restoring aqueous outflow drainage in primary open-angle glaucoma. However, the mechanism of RAOD remains to be fully understood. Based on literature review and research studies, the potential mechanisms of RAOD are the following: (i) Circumferential dilation of the Schlemm’s canal (SC) and surrounding collector channels. (ii) Instant formation of microcracks through RAOD procedures. (iii) Formation of more pores, and local detachment between the SC endothelium (SCE) and basement membrane. (iv) Activation of stem cells by constant mechanical stress caused by the tensional suture placed at the anterior part of the SC. (v) Reversal of trabecular meshwork (TM) herniation. (vi) Mobilization of the reserve of the aqueous drainage. (vii) Change of SCE phenotype. (viii) Mechanosensing and mechanotransducing of TM.

关键词： reconstruction of aqueous outflow drainage canaloplasty Schlemm'scanal trabecular meshwork

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Toxicity threshold of lead(Pb) to nitrifying microorganisms in soils determined by substrate-induced nitrification assay and prediction model

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Journal of Integrative Agriculture 2017年第8期16卷 1832-1840页

作者： ZHENG Han CHEN Li LI ning LIU Bin meng Nan WANG meng CHEN Shi-bao Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences Institute of Plant Protection and Environmental Protection Beijing Academy of Agriculture and Forestry Science

Lead （Pb） contamination has often been recorded in Chinese field soils. In recent years, efforts have been made to inves- tigate Pb toxicity thresholds in soils with plant growth and microbial assays. However, the influence of soil properties on Pb toxicity impacts on soil microbial processes is poorly understood. In this study ten soils with different properties were collected in China to investigate the relationships between thresholds of Pb toxicity to soil microbes and soil properties. The effect of soil leaching on Pb toxicity was also investigated to determine the possible influence of added anions on Pb toxicity during dose-response tests. Toxicity was inferred by measuring substrate-induced nitrification in leached and non-leached soils after Pb addition. We found that soil microbe Pb toxicity thresholds （ECx, x=10, 50） differed significantly between the soils; the 10% inhibition ratio values （ECI0） ranged from 86 to 218 mg kg-1 in non-leached soils and from 101 to 313 mg kg in leached soils. The 50% inhibition ratio values （EC50） ranged from 403 to 969 mg kg^-1 in non-leached soils and from 494 to 1 603 mg kg^-1 in leached soils. Soil leaching increased EC50 and EC50 values by an average leaching factor （LF） of 1.46 and 1.33, respectively. Stepwise multiple regression models predicting Pb toxicity to soil microbes were developed based on ECx and soil properties. Based on these models, soil pH and organic carbon are the most important soil properties af- fecting Pb toxicity thresholds （R2〉0.60）. The quantitative relationship between Pb toxicity and soil properties will be helpful for developing soil-specific guidance on Pb toxicity thresholds in Chinese field soils.

关键词： dose-response lead (Pb) polluted soil substrate-induced nitrification

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Structure and strain tunings of topological anomalous Hall effect in cubic noncollinear antiferromagnet Mn3Pt epitaxial films

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Science China(Physics,Mechanics & Astronomy) 2020年第9期63卷 105-110页

作者： ning An meng Tang Shuai Hu HuangLin Yang WeiJia Fan ShiMing Zhou XuePeng Qiu Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and EngineeringTongji UniversityShanghai 200092China

Antiferromagnets(AFMs)with chiral noncollinear spin structure have attracted great attention in recent ***,the existing research has mainly focused on hexagonal chiral AFMs,such as Mn3Sn,Mn3Ga,Mn3Ge with low crystalline ***,we present our systematical study for the face-centered cubic noncollinear antiferromagnetic *** varying the alloy composition(x),we have successfully fabricated antiferromagnetic Mn1-xPtx epitaxial films on MgO substrates and have observed a crystalline structure transition from L10 MnPt to L12 *** Mn3Pt exhibits a large anomalous Hall effect,which is in the same order of magnitude as those of ferromagnetic ***,a large thickness-evolved strain effect is revealed in Mn3Pt films by X-ray diffraction(XRD)analysis based on the Scherrer *** work explores Mn3Pt as a promising candidate for topological antiferromagnetic spintronics.

关键词： anomalous Hall effect noncollinear antiferromagnet strain effect L10 and L12 alloys

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Synthesis and Characterization of Ion-exchange Sulfonated Poly (ether sulfone)

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Chinese Chemical Letters 2006年第4期17卷 447-448页

作者： Fan xiu meng Chun Qing ZHANG Lian LIU Yuan Yuan ZHANG Department of Polymer Materials Science School of Chemical Engineer Dalian University of Technology Dalian 116012

N,N＇-Bis（3-hydroxyphenyl）-1,8,4,5-naphthalenetetracarboxylic bisimide was prepared from the reaction of 1,8,4,5-naphthalenetetrcarboxylic acid dianhydride and 2-aminophenol in N, N-dimethylformamide. Polymerization of this bisimide with 4,4＇-difluorodiphenylsulfone and disodium 3,3＇-disulfonate4,4＇-difluorodiphenylsulfone gave ion-exchange sulfonated poly（ether sulfone）. The structure of the title compound was characterized with H-NMR and its polymer was characterized with FT-IR.

关键词： Bisimide ion-exchange polymer sulfonated poly(ether sulfone).

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De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第1期 174-180页

作者： Fan-Xiao meng Xing-Yu Wang Ka Lu Ju-Song Yang Fu-Min Zhang Ai-Jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

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Denoising Stochastic Progressive Photon Mapping Renderings Using a Multi-Residual Network

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Journal of Computer Science & Technology 2020年第3期35卷 506-521页

作者： Zheng Zeng Lu Wang Bei-Bei Wang Chun-meng Kang Yan-ning Xu School of Software Shandong UniversityJinan 250101China School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Information Science and Engineering Shandong Normal UniversityJinan 250358China

Stochastic progressive photon mapping(SPPM)is one of the important global illumination methods in computer *** can simulate caustics and specular-diffuse-specular lighting effects ***,as a biased method,it always suffers from both bias and variance with limited iterations,and the bias and the variance bring multi-scale noises into SPPM *** learning-based methods have shown great advantages on denoising unbiased Monte Carlo(MC)methods,but have not been leveraged for biased *** this paper,we present the first learning-based method specially designed for denoising-biased SPPM ***,to avoid conflicting denoising constraints,the radiance of final images is decomposed into two components:caustic and *** two components are then denoised separately via a two-network *** each network,we employ a novel multi-residual block with two sizes of filters,which significantly improves the model’s capabilities,and makes it more suitable for multi-scale noises on both low-frequency and high-frequency *** also present a series of photon-related auxiliary features,to better handle noises while preserving illumination details,especially *** with other state-of-the-art learning-based denoising methods that we apply to this problem,our method shows a higher denoising quality,which could efficiently denoise multi-scale noises while keeping sharp illuminations.

关键词： denoising stochastic progressive photon mapping(SPPM) deep learning residual neural network

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