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MORPHOLOGY EVOLUTION OF POLY(St-co-BuA)/SILICA NANOcoMPOSITE PARTICLES SYNTHESIZED BY EMULSION POLYMERIZATION

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Chinese Journal of Polymer Science 2006年第3期24卷 323-331页

作者： Hua Li 周树学 bo You Li-min Wu Department of Materials Science The Advanced Coatings Research Center of China Educational Ministry Fudan University Shanghai 200433 China Faculty of Chemistry and Materials Science Hubei University Wuhan 430062 China

Poly（St-co-BuA）/silica nanocomposite latexes were synthesized via conventional emulsion polymerization in the presence of 3-（trimethoxysilyl）propyl methacrylate modified colloidal nano-silica. The effects of surface property, particle size and content of colloidal nano-silica as well as the concentrations of monomer and surfactant on the morphology of nanocomposite latex particles were investigated by transmission electron microscope （TEM） and scanning electron microscope （SEM） in detail. Various interesting morphologies such as grape-like, Chinese gooseberry-like, pomegranate-like and normal core-shell structures were observed. Droplet nucleation mechanism competing with micelle nucleation mechanism was proposed to explain the morphological evolution of the nanocomposite particles.

关键词： Morphology colloidal nano-silica Nanocomposite particle Emulsion polymerization.

Hollow MOF capsule encapsulated amino-functionalized ionic liquid for excellent co_(2) catalytic conversion

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Chinese Journal of Chemical Engineering 2021年第12期34卷 124-130页

作者： bo-Yun Liu min-Jie Chen Liang Yang bo Zhao Tao Xia Gang-Gang Chang School of Power Engineering Naval University of EngineeringWuhan 430033China School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China

The engineering of highly efficient and stable heterogeneous catalysts for catalytic conversion of co_(2) to high value-added products is highly desirable but presents a great challenge. Herein, we reported the synthesis of a series of multifunctional IL@H-Zn/co-ZIF composite catalysts with a unique porous hollow capsule structure and encapsulated amino-functionalized ionic liquids(ILs). The unique hollow capsule structure of IL@H-Zn/co-ZIF provides sufficient space for loading active ILs([C_(2)NH_(2) Mim+][Brà]) and fast mass transfer of substrate molecules during catalysis. Furthermore, the microporous Zn-ZIF shell can effectively avoid the leaching of active ILs. Benefiting from the unique hollow structure, the resultant IL@H-Zn/co-ZIF demonstrated excellent catalytic performance(>95% yield), and good recyclability(still remained about 90% activities after 5 cycles) when applied in the co_(2) cycloaddition reaction under solvent and co-catalyst free conditions.

关键词： MOFs Catalyst Hollow capsule co_(2)capture Ionic liquids

Rh single atoms embedded in CeO_(2) nanostructure boost co_(2) hydrogenation to HcoOH

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Chinese Journal of Chemical Engineering 2022年第3期35卷 62-69页

作者： bo Wu Xing Yu min Huang Liangshu Zhong Yuhan Sun CAS Key Laboratory of Low-Carbon conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

co_(2)hydrogenation to value-added chemicals is a promising pathway to solve co_(2)-relevant environmental problems but still remains a great ***,we report a CeO_(2)nanostructure supported Rh single atoms(Rh-SAs/CeO_(2))catalyst and was used for the efficient co_(2)hydrogenation to *** Rh-SAs/CeO_(2)exhibited high catalytic activity with turnover numbers(TON)up to 221 at 200℃,which was 4-fold to that of CeO_(2)supported Rh nanoparticles(Rh-NPs/CeO_(2)).Moreover,HcoOH selectivity for Rh-SAs/CeO_(2)reached 85%,much higher than that of Rh-NPs/CeO_(2)(46%).Mechanism studies revealed that Rh single atoms in the Rh-SAs/CeO_(2)with high metal atoms utilization efficiency not only provided abundant active sites to promote the catalytic activity,but also suppressed the decomposition of HcoOH to co and benefited the formation of HcoOH.

关键词： co_(2)hydrogenation Selectivity Single-atom catalysts(SACs) Rh HcoOH

Ultralight and superelastic MXene/reduced graphene oxide aerogels for electromagnetic interference shielding

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Nano Research 2025年第1期18卷 1-9页

作者： Xinfeng Zhou Yang Dai Guoyao Yue Yiman Zhang Lulu Li Zhong-Zhen Yu Peng min Hao-Bin Zhang 21 State Key Laboratory of Organic-Inorganic composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Advanced Functional Polymer composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Present address:boE Technology Innovation Center BOE Technology Group Co.Ltd.Beijing 100176China Xi’an Modern Chemistry Research Institute Xi’an 710065China

Lightweight aerogels feature multifunctionality and a high porosity,yet accompanied with poor structure recovery under large strain *** this work,we develop an air bubble-ice crystal dual template and annealing strategy to integrate low density and high resilience for the conductive transition metal carbides/nitrides(MXene)composite *** air bubbles and ice crystals synergistically exclude the nanosheets to the gas-liquid interfaces,thereby constructing unique Y-shaped junctions and robust *** annealing process greatly enhances the interlayer *** external load,the Yshaped structures prevent the stress concentration at the junctions by transferring the forces to the skeleton for maintaining structural *** addition,the wrinkled and thick cell walls,together with the enhanced interlayer interactions,endow the aerogel with exceptional structural stability and *** a result,the MXene/reduced graphene oxide(RGO)composite aerogels exhibit superelasticity with reversible compressive strains of up to 95%.In addition,the electron bridging effect of the RGO sheets affords the aerogel to deliver excellent electromagnetic interference shielding performance,as high as 46.3 dB at 2.5 ***,the remarkable reshapeability of the aerogels allows for precise regulation of structure and performance(33.5-75.1 dB)by a simple wetting compression *** summary,this work offers helpful inspirations for developing lightweight and superelasticity aerogels for extensive applications.

关键词： lightweight superelasticity MXene aerogel electromagnetic interference shielding reshapeability

Anaerobic digestion of kitchen wastes in a single-phased anaerobic sequencing batch reactor(ASBR) with gas-phased absorb of co_2

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Journal of Environmental Sciences 2005年第2期17卷 249-255页

作者： ZHANGbo HEZheng-guang ZHANGLi-li XUJian-bo SHIHong-zhuan CAIWei-min SchoolofEnvironmentalScienceandEngineering ShanghaiJiaotongUniversityShanghai200240China SchoolofEnvironmentalScienceandEngineering ShanghaiJiaotongUniversityShanghai200240China／／HarbinInstituteofTechnologyHarbin150001China

The performance of the single-stage anaerobic digestion of kitchen wastes was investigated in an anaerobic sequencing batch reactor(ASBR) with gas-phased absorb of co 2. The ASBR was operated at four chemical oxygen demand(coD) loading rates, 2.8, 5.1, 6.2 and 8.4 g/(L·d) respectively. The coD loading rate was increased with the TS concentration and HRT changing. At maximum coD loading rate of 8.4 g/(L·d), the coD, total solid(TS) removal rate and methane gas yield were 69%, 68% and 2.5 L/(L·d) respectively. The operation of the reactor with gas-phased absorb of co 2 was stable in spite of the low pH(2.6—3.9) and high concentration of TS(142 g/L) of input mixture. The output volatile fatty acid(VFA) concentration was between 2.7—4.7 g/L and had no inhibition on the methanogenic microorganism. The reactor without gas-phased absorb of co 2 became acidified when the total coD loading rate was increased to 5.1 g/(L·d). Stoichiometry of the methanogenesis for kitchen wastes showed a considerable amount of alkaline will be required to keep pH in the appropriate range for the methanogenic microorganism based on theoretical calculation. Gas-phased absorb of co 2 effectively reduced the alkaline consumption, hence avoided excessive cation into the reactor.

关键词： kitchen wastes methanogenesis gas-phased co 2

Data-driven flatness intelligent representation method of cold rolled strip

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Journal of Iron and Steel Research International 2023年第5期30卷 994-1012页

作者： Yang-huan Xu Dong-cheng Wang bo-wei Duan Hong-min Liu National Engineering Research Center for Equipment and Technology of cold Rolling Strip Yanshan UniversityQinhuangdao 066004HebeiChina National Key Laboratory of Metal Forming Technology and Heavy Equipment China National Heavy Machinery Research Institute Co.Ltd.Xi’an 710032ShaanxiChina State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004HebeiChina

A high-accuracy flatness prediction model is the basis for realizing flatness *** flatness is typically reflected as the strain distribution,which is a ***,it is difficult to obtain ideal results if the real flatness is directly used as the output value of the flatness intelligent prediction ***,it is necessary to seek an abstract representation method of real *** this reason,two new intelligent flatness representation models were proposed based on the autoencoder of unsupervised learning theory:the flatness autoencoder representation(FAR)model and the flatness stacked sparse autoencoder representation(FSSAR)*** with the traditional Legendre fourth-order polynomial representation model,the representation accuracies of the FAR and FSSAR models are significantly improved,better representing the flatness defects,like the double tight *** optimal number of bottleneck layer neurons in the FAR and FSSAR models is 5,which means that five basic patterns can accurately represent real *** with the FAR model,the FSSAR model has higher representation accuracy,although the flatness basic pattern is more abstract,and the physical meaning is not clear ***,the accuracy of the FAR model is slightly lower than that of the FSSAR ***,it can automatically learn the flatness basic pattern with a very clear physical meaning for both the theoretical and real flatness,which is an optimal intelligent representation method for flatness.

关键词： cold rolling flatness Data-driven model Unsupervised learning Representation learning Autoencoder bottleneck layer

Intelligent representation method of image flatness for cold rolled strip

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Journal of Iron and Steel Research International 2024年第5期31卷 1177-1195页

作者： Yang-huan Xu Dong-cheng Wang Hong-min Liu bo-wei Duan National Engineering Research Center for Equipment and Technology of cold Strip Rolling Yanshan UniversityQinhuangdao066004HebeiChina National Key Laboratory of Metal Forming Technology and Heavy Equipment China National Heavy Machinery Research Institute Co.Ltd.Xi’an710018ShaanxiChina State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004HebeiChina

Real flatness images are the bases for flatness detection based on machine vision of cold rolled *** characteristics of a real flatness image are analyzed,and a lightweight strip location detection(SLD)model with deep semantic segmentation networks is *** interference areas in the real flatness image can be eliminated by the SLD model,and valid information can be *** this basis,the concept of image flatness is proposed for the first *** image flatness representation(IFAR)model is established on the basis of an autoencoder with a new *** optimal structure of the bottleneck layer is 16×16×4,and the IFAR model exhibits a good representation ***,interpretability analysis of the representation factors is carried out,and the difference and physical meaning of the representation factors for image flatness with different categories are *** flatness with new defect morphologies(bilateral quarter waves and large middle waves)that are not present in the original dataset are generated by modifying the representation factors of the no wave ***,the SLD and IFAR models are used to detect and represent all the real flatness images on the test *** average processing time for a single image is 11.42 ms,which is suitable for industrial *** research results provide effective methods and ideas for intelligent flatness detection technology based on machine vision.

关键词： cold rolled strip Image flatness Location detection Representation learning bottleneck layer

NO_x Removal by Oxidation on Alumina Supported Metal Oxide Catalysts Followed by Alkaline Absorption

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China Petroleum Processing & Petrochemical Technology 2019年第3期21卷 1-9页

作者： Yang Xue Sun min Liu bo Lin Wei SINOPEC Research Institute of Petroleum Processing

NO oxidation is the key reaction for the oxidative NO x removal *** this work,the catalytic NO oxidation performance of the Al2O3 supported metal oxide catalysts(M-Al2O3,M=V,Mn,Fe,co,Ni and Ce)is *** oxidation product is absorbed by the alkaline solution for NO x *** NO oxidation activity increases in the following order:Vcoboth the O uptake and the NO oxidation *** all the M-Al2O3 catalysts,there is an intermediate temperature to achieve maximum NO conversion,which is lower for more efficient M-Al2O3 *** temperature dependence suggests that the NO oxidation at low temperature is kinetically controlled while it is thermodynamically limited at higher *** NO x removal ratio by the alkaline solution absorption increases with the NO2/NO ratio,with a maximum removal ratio of 80%when the NO2/NO ratio is higher than 3,indicating that a very high NO conversion is unnecessary.

关键词： NOx removal NO oxidation M-Al2O3 catalysts alkaline absorption

Effect of Biochar as Reductant on Magnetizing-roasting Behavior of Pyrite Cinder

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Journal of Iron and Steel Research International 2015年第5期22卷 371-376页

作者： Xiao-hui FAN Qiong DENG min GAN Hai-bo WANG School of minerals Processing and Bioengineering Central South University

The effect of biochar substituted for anthracite as reductant on magnetizing-roasting pyrite cinder was in- vestigated. The key of magnetizing-roasting is the gasification reaction between reductants and co2. Since biochar could react with co2 more rapidly at lower temperature, the reactivity of biochar is better than that of anthracite. The gasification of biochar could produce reducing condition of φco/（φco--φco2 ） about 10 %- 20 % between 700-- 800 ℃, which is in accord with the atmosphere and temperature of Fe2 O3 reduction. So it is beneficial to the reduc- tion of iron mineral of pyrite cinder. compared with anthracite, bioehar could decrease the roasting temperature from 825 to 750 ℃ and roasting time from 20 to 15 min, which shows that a better effect of magnetization could be ob- tained in the condition of lower temperature and shorter time. Using biochar as reductant, iron concentrate extracted from pyrite cinder as about 64% iron grade could be produced, and the recovery is over 90% under the condition of above 90% grinding particle less than 0. 045 mm and magnetic intensity of 0. 124--0. 194 T.

关键词： pyrite cinders biochar magnetizing roasting conversion rate