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Engineered Wood/Bamboo Laminated Composites for Outdoor Hydrophilic Platforms:Structural Design and Performance

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Journal of Renewable Materials 2022年第9期10卷 2477-2487页

作者： Lifeng Ji Qiuxia Zhang fei rao School of Art and Design Zhejiang Sci-Tech UniversityHangzhou310018China

Landscape designers increasingly prefer to use wood/bamboo-based composites for outdoor hydrophilic platforms owing to their natural surface texture,high performance,and sustainability to facilitate extensive interaction between people and water and enable the full range of ecological functions of water *** this study,four laminated composite(LC)structures were designed and manufactured using fluffed bamboo and wood *** surface textures,profile densities,water resistances,and mechanical properties were then *** type of fluffed veneer of the surface layer determined the texture of the LC *** specific structures of fluffed bamboo and wood veneer laminations were found to affect the LC profile density variability,water resistance,and mechanical properties owing to the differences in the strength and interfacial properties of bamboo and wood ***,the water resistance and mechanical properties of all four LCs were found to be much higher than the highest level specified in GB/T 20241-2006 for“laminated veneer lumber”and GB/T 30364-2013 for“bamboo scrimber flooring”,indicating that they are promising materials for structures and flooring,particularly for outdoor hydrophilic platforms.

关键词： Wood/bamboo laminated composites outdoor hydrophilic platform surface texture water resistance mechanical properties

In situ construction of oxygen-vacancy-rich Bi^(0)@Bi_(2)WO_(6)-x microspheres with enhanced visible light photocatalytic for NO removal

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Chinese Chemical Letters 2021年第6期32卷 2038-2042页

作者： Xiaoqian Xie Qadeer-Ul Hassan Huan Lu fei rao Jianzhi Gao Gangqiang Zhu School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710062China School of Geography and Tourism Shaanxi Normal UniversityXi'an 710062China

Surface oxygen vacancy defects and metal deposition on semiconductor photocatalysts play a critical role in photocatalytic *** this work,oxygen-deficient Bi_(2)WO_(6)microspheres have been prepared by a facile ethylene glycol-assisted solvothermal ***0 nanoparticles were reduced by in situ thermaltreatment on Bi_(2)WO_(6)microspheres to obtain Bi^(0)@Bi_(2)WO_(6)-x as well as maintaining the oxygen vacancies(OVs)under N_(2)***,photocatalytic NO oxidation removal activities of these photocatalysts were investigated under visible light irradiation and Bi^(0)@Bi_(2)WO_(6)-x shows the best NO removal activity than other *** photogenerated cha rge separation and trans fe r are promoted by Bi0 nanoparticles deposited on the surface of semiconductor *** defects promote the activation of reactants(H_(2)O and O_(2)),thereby enhancing the formation of the active ***,both OVs defects and Bi0 metal have the characteristics of extending light absorption and enhancing the efficient utilization of solar ***,the photocatalytic NO oxidation mechanism of Bi^(0)@Bi_(2)WO_(6)-xwas investigated by in situ FTIR spectroscopy for reaction intermediates and final *** work furnishes insight into the synthesis strategy and the underlying photocatalytic mecha nism of the surfacemodified Bi^(0)@Bi_(2)WO_(6)-x composite for pollutants removal.

关键词： Bi_(2)WO_(6)microspheres Oxygen vacancies Bi metal Photocatalytic reaction In situ FTIR

Au nanoparticles loaded on hollow BiOCl microstructures boosting CO_(2)photoreduction

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Chinese Chemical Letters 2022年第9期33卷 4385-4388页

作者： Siwen Gong fei rao Weibin Zhang Qadeer-Ul Hassan Zhaoqing Liu Jianzhi Gao Jiangbo Lu Mirabbos Hojamberdiev Gangqiang Zhu School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710062China School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China School of Chemistry and Chemical Engineering Institute of Clean Energy and MaterialsGuangzhou UniversityGuangzhou 510006China Institute of Chemistry Technical University of BerlinBerlin 10623Germany

The BiOCl(BOC)synthesized by the water bath heating method was treated with sodium borohydride(NaBH_(4))to introduce oxygen vacancies(OVs).At the same time,Au nanoparticles were loaded to prepare a series of Au/BiOCl samples with different *** and Au nanoparticles can promote the light absorption of host photocatalyst in the visible *** calculated work function of BiOCl and Au can verify the existence of Ohmic contact between the interface of them,which is conducive to the separation of charge *** a series of photoelectric tests,it was verified experimentally that the separation of charge carriers is indeed *** high-energy hot electrons produced by Au under the surface plasmon resonance(SPR)effect can increase the counts of electrons to participate in the CO_(2)reduction *** for 1.0%-Au/BOC,the yields of CO can reach 43.16μmol g^(−1)h^(−1),which is 6.6 times more than that of ***,loading precious metal on semiconductors is an effective strategy to promote the photocatalytic performance of CO_(2)reduction reactions.

关键词： BiOCl Au nanoparticles Oxygen vacancy Ohmic contact CO_(2)photoreduction

Surgical left atrial appendage occlusion in patients with atrial fibrillation undergoing mechanical heart valve replacement

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Chinese Medical Journal 2020年第16期133卷 1891-1899页

作者： Ye Zheng Chen-fei rao Si-Peng Chen Li He Jian-Feng Hou Zhe Zheng Department of Cardiovascular Surgery Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China Information Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China.

Background:Surgical left atrial appendage occlusion(SLAAO)may be associated with a lower risk of thromboembolism in patientswith atrial fibrillation undergoing cardiac ***,evidence regarding the effectiveness of SLAAO in patients undergoingmechanical heart valve replacement(MHVR)is ***,we aimed to evaluate the association between SLAAO and thecardiovascular outcomes in patients with atrial fibrillation undergoing ***:We retrospectively analyzed data for 497 patients with atrial fibrillation;27.6%of the patients underwent SLAAO,andthe remainder of the patients did not(No-SLAAO group).The primary outcome was a composite of ischemic stroke,systemicembolism,and all-cause *** event-free survival rates were estimated using Kaplan-Meier curves,and weperformed multivariate Cox analyses to evaluate the association between SLAAO and *** used one-to-one propensityscore matching to balance patients’baseline characteristics,and analyzed 120 matching ***:Five patients died within 30 days postoperatively,and there were no significant differences between the two groupsregarding in-hospital complications(all P>0.05).After a median follow-up of 14 months,14 primary events ***-Meier curves showed no difference in the cumulative incidence of freedom from the primary outcome(log-rank P=0.830),hemorrhagic events(log-rank P=0.870),and the secondary outcome(log-rank P=0.730),between the two *** proportional hazards regression analysis showed no association between SLAAO and any outcome(all P>0.05).Afterpropensity score matching,cardiopulmonary bypass time and aortic cross-clamp time,and the postoperative length of stay weresignificantly longer in the SLAAO group(all P<0.05);results were similar to the unadjusted ***:Concomitant SLAAO and MHVR was associated with longer length of stay,and cardiopulmonary bypass time andaortic cross-clamp time,but was not associated with add

关键词： Atrial fibrillation Heart valve prosthesis implantation Propensity score

Preparation and properties of C/C-ZrB2-SiC composites by high-solid-loading slurry impregnation and polymer infiltration and pyrolysis（PIP）

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Transactions of Nonferrous Metals Society of China 2019年第10期29卷 2141-2150页

作者： Li-ping RAN fei rao Ke PENG Huan YIN Mao-zhong YI State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Ultrahigh-temperature ceramics were added to C/C composites to meet their application requirement in a high-temperature oxidizing environment. C/C-ZrB2-SiC composites were fabricated by high-solid-loading slurry impregnation with polymer infiltration and pyrolysis. The dispersion and rheological behavior of ZrB2 slurry and the microstructural, mechanical, and ablation properties of the C/C-ZrB2-SiC composites were investigated. Results indicated that a well-dispersed and low-viscosity ZrB2 slurry was obtained using 0.40 wt.% polyethyleneimine as a dispersant at pH 5. Ceramics were uniformly distributed in the short-cut fiber layer and needle-punched area. The flexural strength of the C/C-ZrB2-SiC composites was 309.30 MPa. The composites exhibited satisfactory ablation resistance under the oxyacetylene flame of 2500℃, and the mass and linear ablation rates were 0.40 mg/s and 0.91 μm/s, respectively. A continuous and compact Zr O2 layer, which could effectively reduce the diffusion rate of oxygen and protect the composites from being ablated, was formed.

关键词： C/C-ZrB2-SiC composites microstructure mechanical properties ablation properties

Extraction of manganese and zinc from their compound ore by reductive acid leaching

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Transactions of Nonferrous Metals Society of China 2017年第5期27卷 1172-1179页

作者： Qian LI Xue-fei rao Bin XU Yong-bin YANG Ting LIU Tao JIANG Long HU School of Minerals Processing and Bioengineering Central South University Changsha 410083 China

Comprehensive utilization of low grade manganese?zinc compound ore containing lead and silver with a method of reductive acid leaching was *** to theφ?pH diagram of Mn?Zn?H2O system,Mn and Zn can be leached simultaneously in the pH range of?*** results showed that both hydrogen peroxide and sucrose were effective reductants which could intensify the simultaneous leaching of Mn and Zn into leachate as well as enrich Pb and Ag in the residue.95.88%of Mn and99.23%of Zn were extracted when the compound ore was leached with hydrogen peroxide in sulfuric acid media,meanwhile the contents of Pb and Ag in the residue were enriched to13.21%and489.36g/t,*** sucrose was used as the reductant,the leaching efficiencies of Mn and Zn separately achieved98.26%and99.62%,and contents of Pb and Ag in the residue were as high as13.92%and517.87g/t,respectively.

关键词： manganese.zinc compound ore hydrogen peroxide sucrose comprehensive utilization manganese zinc leaching

Flower-like Bi^0/CeO2-δ plasmonic photocatalysts with enhanced visible-light-induced photocatalytic activity for NO removal

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Science China Materials 2020年第11期63卷 2272-2280页

作者： Junli Nie Jianzhi Gao Qian Shen Weibin Zhang fei rao Mirabbos Hojamberdiev Gangqiang Zhu School of Physics and Information Technology Shaanxi Normal UniversityXi'an 710062China Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) Nanjing Tech UniversityNanjing 211816China School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China Institut für Chemie Technische Universitat BerlinStraβe des 17.Juni 13510623 BerlinGermany

Plasmonic bismuth(Bi^0)nanoparticle-decorated flower-like CeO2-δ(Bi^0/CeO2-δ)photocatalysts with abundant oxygen vacancies(OVs)were synthesized via a solvothermal *** OVs can not only improve the separation of electron-hole pairs,but also facilitate the adsorption and activation of gas molecules(NO/O2).In addition,the Bi^0 nanoparticles can enhance the visible light response and prevent the recombination of charge carriers by virtue of the surface plasmon resonance(SPR)effect,achieving an excellent ability for NO elimination and NO2 inhibition under visible light *** functional theory(DFT)calculations confirm that the Schottky barrier between Bi^0 and CeO2-δaccompanied with the OVs are pivotal for the migration of photogenerated charge carriers to involve in the photocatalytic NO *** experiments and in situ FTIR spectroscopy were conducted to explore the mechanism of the photocatalytic NO removal,suggesting that the photocatalytic NO removal can be significantly enhanced by introducing abundant OVs and the involvement of Bi^0 metal nanoparticles.

关键词： cerium oxide bismuth nanoparticles oxygen vacancy surface plasmon resonance Schottky barrier NO removal

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轴向磁场混合永磁记忆电机电磁转矩精确分离

东南大学学报（自然科学版） 2024年第3期54卷 730-737页

作者：杨公德饶飞林明耀福州大学电气工程与自动化学院福州350108 东南大学电气工程学院南京210096

为了解决传统记忆电机转矩密度较低,电枢绕组与励磁绕组空间位置冲突等问题,结合轴向磁场永磁电机,提出一种新型轴向磁场混合永磁记忆电机.该电机采用定子分离结构,使用NdFeB与AlNiCo混合励磁,实现宽调速范围和高转矩密度.为了分析不同... 详细信息

为了解决传统记忆电机转矩密度较低,电枢绕组与励磁绕组空间位置冲突等问题,结合轴向磁场永磁电机,提出一种新型轴向磁场混合永磁记忆电机.该电机采用定子分离结构,使用NdFeB与AlNiCo混合励磁,实现宽调速范围和高转矩密度.为了分析不同永磁体对新型电机输出转矩的贡献,解决传统冻结磁导率法无法准确分离电磁转矩的问题,提出一种新型冻结磁导率法,并对比分析了2种方法的分离结果.结果表明:在不同磁化状态下,新型转矩分离方法的分离精度始终高于传统转矩分离方法,与有限元计算结果的相对误差始终小于5%;在正向完全充磁状态下,新型转矩分离方法与有限元计算结果的相对误差仅为0.94%.所提转矩分离方法实现了新型记忆电机中电磁转矩的精确分离.

关键词：混合永磁记忆电机定子分离冻结磁导率转矩分离

轴向磁场对环形浅液池内硅熔体热毛细对流的影响

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人工晶体学报 2016年第6期45卷 1465-1470,1476页

作者：饶朏彭岚张全壮重庆大学动力工程学院低品位能源利用技术及系统教育部重点实验室重庆400044

为了更好地了解轴向磁场对温度梯度作用下Marangoni-热毛细对流的影响,采用有限差分法对环形浅液池内硅熔体制单晶的流动进行了数值模拟。研究了三种不同边界条件下,Ha数分别为0、10、20、30对应下硅熔体内部流动强度和自由表面速度。... 详细信息

为了更好地了解轴向磁场对温度梯度作用下Marangoni-热毛细对流的影响,采用有限差分法对环形浅液池内硅熔体制单晶的流动进行了数值模拟。研究了三种不同边界条件下,Ha数分别为0、10、20、30对应下硅熔体内部流动强度和自由表面速度。结果表明,轴向磁场对浅液池内的Marangoni对流、热毛细对流和耦合的Marangoni-热毛细对流都有较好的抑制作用,且随着磁场强度的增强,抑制作用增加,更有利于提高晶体的结晶质量。当磁场强度和底部热流密度一定时,随着水平温度梯度的增加,靠近内壁的流动得到增强,外壁附近流动反而减弱。

关键词：轴向磁场热毛细对流温度梯度环形液池