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Science China(Technological Sciences) 2021年第4期64卷 785-792页

作者： GE Bo ZHANG Yuling ZHANG TingXiao REN GuiNa li wenzhi ZHAO Hui School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China School of Environmental and Material Engineering Yantai UniversityYantai 264405China

Various forms of pollutants discharged from industrial and life;how to treat the opposite water-soluble pollutants at the same time is a challenge.Here,a superhydrophobic BiOBr/Ag3PO4 fabric(SH fabric)bulk material was prepared aiming at the diversity of pollutants.Water(WCA=160°)and oil contaminants(spread)have different wetting behavior on fabric surfaces.The high recovery efficiency for oil pollutants was achieved by using the selective oil removal property of the SH fabric.Meanwhile,the pollutants in the aqueous phase were removed by photocatalyst after oil/water separation.Mechanism analysis demonstrated that the direct Z-type heterojunction formed between BiOBr(EVB=1.66 eV;ECB=-1.08 eV)and Ag3PO4(EVB=3.03 eV;ECB=0.6 eV).It is worth noting that the SH fabric exhibited good mechanical stability and UV shielding performance,which have potential application in environmental control.

关键词： superhydrophobic UV shielding oil-water separation pollutant removal

Influence of cellulose crystal plane on cellulose hydrolysis

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International Journal of Agricultural and Biological Engineering 2016年第4期9卷 151-158页

作者： li wenzhi Lu Wenyu li Minghao Wu Hao Pan Guoqiang Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei 230026China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China

Cellulose polymerization degree and crystal plane changing are both considered to affect acid hydrolysis,however,it is uncertain to identify which one is more important.In this study,the filter paper was treated with dilute hydrochloric acid to investigate the cellulose polymerization degree changing,and cotton linter was treated with NaOH for the purpose of changing its crystal plane.Both the treated and untreated samples were hydrolyzed under the condition of 1.0 wt%dilute hydrochloric acid with solid-liquid ratio 1:40 at 140℃for 30 min to compare the hydrolysis effects.It was found that the glucose yield increased from 9.5%to 19.7%when treated with 15%NaOH at 50℃for 30 min,and new crystal planes(1-10)(1-20)appeared after alkali treatment.According to the experimental results,it is concluded that crystal plane plays a vital role in cellulose acid hydrolysis.

关键词： biomass degree of polymerization crystal plane hydrolysis

A real-time QoE methodology for AMR codec voice in mobile network

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Science China(Information Sciences) 2014年第4期57卷 83-95页

作者： li wenzhi WANG Jing XING ChengWen FEI ZeSong KUANG JingMing School of Information and Electronics Beijing Institute of Technology

This paper studies a general strategy to predict voice Quality of Experience(QoE)for various mobile networks.Particularly,based on data-mining for Adaptive Multi-Rate(AMR)codec voice,a novel QoE assessment methodology is proposed.The proposed algorithm consists of two parts.The first part is devoted to assessing speech quality of fixed rate codec mode(CM)of AMR while in the other one a adaptive rate CM is designed.Measuring basic network parameters that have much impact on speech quality,QoE can be monitored in real time for operators.Meanwhile,based on the measurement data sets from real mobile network,the QoE prediction strategy can be implemented and QoE assessment model for AMR codec voice is trained and tested.Finally,the numerical results suggest that the correlation coefficient between predicted values and true values is greater than 90%and root mean squared error is less than 0.5 for fixed and adaptive rate CM.

关键词： quality of experience(QoE) speech quality adaptive multi-rate(AMR) objective speech quality measurement data mining multivariate adaptive regression splines(MARS)

Preparation of superhydrophobic CdS cotton using visible light response and its application for the control of water pollution

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Science China(Technological Sciences) 2019年第12期62卷 2236-2242页

作者： GE Bo REN GuiNa ZHAO PengFei JIN ChuanYu li wenzhi ZHANG ZhaoZhu School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China School of Environmental and Material Engineering Yantai UniversityYantai 264405China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Sewage discharge produced by homes and industries contains both oil and water-soluble components. In order to remove oil from water, materials with specific wettability can be used;however, these materials cannot remove dissolved contaminants from water. In this research, we prepared a superhydrophobic Cd S cotton for water purification. This material has the ability to adsorb different types of oil due to its non-wettability(WCA = 152°). Moreover, its response behavior towards visible light enables it to remove water-soluble pollutants as well. The highest oil absorption rate of superhydrophobic Cd S cotton is nearly 30 times, and it can absorb light below 564 nm and produce ·OH to degrade water soluble pollutants. Finally, based on Mott-Schottky curve,the position of Fermi energy level was determined(–0.55 e V). Also, the positions of valence and conduction bands were calculated based on the analysis of band gap which helps in proving photoelectric response characteristics.

关键词： superhydrophobic cotton CdS photocatalytic

特定结构复合材料衍生催化剂在甲烷干重整中的研究进展

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复合材料学报 2024年第6期41卷 2845-2862页

作者：谢玄兰陆志恒李文志安徽理工大学地球与环境学院合肥综合性国家科学中心能源研究院中国科学技术大学工程科学学院

钙钛矿、尖晶石和水滑石这类特定结构复合材料组成灵活、结构可控、热稳定性较好，在催化应用中吸引了广泛的研究兴趣。甲烷干重整是一项可同时将CH4和CO2转化为低H2/CO摩尔比合成气的极具应用前景技术，常规负载型催化剂在高温重整条... 详细信息

钙钛矿、尖晶石和水滑石这类特定结构复合材料组成灵活、结构可控、热稳定性较好，在催化应用中吸引了广泛的研究兴趣。甲烷干重整是一项可同时将CH4和CO2转化为低H2/CO摩尔比合成气的极具应用前景技术，常规负载型催化剂在高温重整条件下易面临由积炭和活性组分烧结导致催化剂失活的难题，而由特定结构复合材料衍生的负载型催化剂因在催化活性和稳定性方面表现出一定的优越性而备受关注。本文先简述了甲烷干重整反应特征、面临的挑战以及反应机制研究现状，并阐述钙钛矿、尖晶石和水滑石这3种复合材料的结构特性，作为催化剂前体应用于该反应的优缺点、性能以及催化路径研究现状。文中指出：钙钛矿结构相对更稳定，但高煅烧温度易导致衍生催化剂表面积较低；水滑石衍生催化剂通常具有较高比表面积，且在特定情况下能恢复部分有序层状结构；水滑石与尖晶石对温度相对更敏感一些，存在的反尖晶石结构有利于提高衍生催化剂还原性。此外，还总结了这3种特定结构复合材料衍生催化剂的催化机制，明确CH4是在活性金属位点上活化，因催化剂和操作条件的影响，目前研究人员对于催化剂表面反应机制的细节暂时还没有达成明确共识。最后，本文对特定结构复合材料衍生催化剂在甲烷干重整中的应用提出了建议。

关键词：特定结构复合材料钙钛矿尖晶石水滑石衍生催化剂甲烷干重整反应机制

Fabrication of BiOBr-silicone aerogel photocatalyst in an aqueous system with degradation performance by sol-gel method

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Science China(Technological Sciences) 2020年第5期63卷 859-865页

作者： GE Bo REN GuiNa YANG Hang YANG JingJing PU XiPeng li wenzhi JIN ChuanYu ZHANG ZhaoZhu School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China School of Environmental and Material Engineering Yantai UniversityYantai 264405China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

It is a challenge to endow the material with the ability to pollutants degradation while maintaining the oil/water separation performance. Herein, the mixed dispersion of BiOBr photocatalyst and silicone sol was adsorbed in melamine foam. Superhydrophobic BiOBr-silicone aerogel(WCA=154°) was obtained through the transfer melamine foam to an autoclave and reaction at 80℃ for 20 h. The prepared superhydrophobic BiOBr-silicone aerogel can effectively remove the water soluble pollutants which remain within the water phase after oil/water separation. The band gap of the superhydrophobic BiOBr-silicone aerogel was calculated to be 2.71 eV, which shows sensitivity to visible light(458 nm). Through mechanism analysis, it is found that the VB position of BiOBr is at 1.07 eV and the position of CB is at-1.64 eV. Finally, we prepared a superhydrophobic BiOBr-silicone aerogel(5 cm×5 cm×3 cm) for the verification of the large scale preparation.

关键词： BiOBr silicone aerogel melamine sponge water purification

两种生育酚酯衍生物对D-半乳糖致衰老小鼠的抗衰老作用

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食品科学 2024年第6期45卷 97-104页

作者：陈炜莉贝翎杨扬王璧莹李家旭阚绪甜李文治杜冰华南农业大学食品学院广东广州510642 无限极(中国)有限公司研发中心广东广州510623

为探究两种生育酚酯衍生物(D-α-生育酚醋酸酯和DL-α-生育酚醋酸酯)的抗衰老作用,本实验测定其体外抗氧化能力,并采用D-半乳糖构建衰老小鼠模型,同时用两种生育酚酯衍生物干预42 d,分析衰老相关指标变化规律。结果表明:在0.1~0.3 mg/m... 详细信息

为探究两种生育酚酯衍生物(D-α-生育酚醋酸酯和DL-α-生育酚醋酸酯)的抗衰老作用,本实验测定其体外抗氧化能力,并采用D-半乳糖构建衰老小鼠模型,同时用两种生育酚酯衍生物干预42 d,分析衰老相关指标变化规律。结果表明:在0.1~0.3 mg/mL质量浓度范围内,两种生育酚酯衍生物的羟自由基清除能力、2,2’-联氮双(3-乙基苯并噻唑啉-6-磺酸)阳离子自由基清除能力、Fe2+螯合能力、总还原能力均优于VC。与衰老模型组相比,经过生育酚酯衍生物干预后,小鼠血清中丙二醛含量显著下降(P<0.05,P<0.01,P<0.001,P<0.0001),谷胱甘肽过氧化物酶和总抗氧化能力显著升高(P<0.05,P<0.01,P<0.001,P<0.0001);血清中炎症因子白细胞介素-6、白细胞介素-1β、肿瘤坏死因子-α和肝功能指标天冬氨酸氨基转移酶、丙氨酸氨基转移酶水平显著降低(P<0.05,P<0.01,P<0.001,P<0.0001);小鼠肝脏中核因子-E2-相关因子(nuclear factor E2 related factor 2,Nrf2)、醌氧化还原酶1(quinone oxidoreductase,NQO1)、血红素氧合酶1(heme oxygenase-1,HO-1)的mRNA及蛋白相对表达量提升,其中DL-α-生育酚醋酸酯的Nrf2、NQO1、HO-1 mRNA相对表达量分别增加了514.08%、461.78%、515.32%,蛋白相对表达量分别增加了620.00%、988.89%、1200.00%(P<0.0001)。综上所述,两种生育酚酯衍生物对D-半乳糖致衰老小鼠具有抗衰老作用,且DL-α-生育酚醋酸酯效果更好,二者抗衰老作用可能与调控Nrf2信号通路相关。

关键词：生育酚酯衍生物 D-半乳糖抗氧化抗衰老核因子-E2-相关因子

Aligned carbon nanotubes for lithium-ion batteries:A review

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Nano Research 2023年第11期16卷 12384-12410页

作者： Chinaza E.Nwanno wenzhi li Department of Physics Florida International UniversityMiamiFL 33199USA

Nanoscale materials are gaining massive attention in recent years due to their potential to alleviate the present electrochemical electrode constraints.Possessing high conductivity(both thermally and electrically),high chemical and electrochemical stability,exceptional mechanical strength and flexibility,high specific surface area,large charge storage capacity,and excellent ionadsorption,carbon nanotubes(CNTs)remain one of the most researched of other nanoscale materials for electrochemical energy storage.Rather than having them packed at random,CNTs perform better when packed/grown to order,vertically or horizontally aligned to a substrate.This study presents an overview of the impact of CNT alignment on the electrochemical performance of lithium-ion batteries(liBs).The unique properties of vertically aligned CNTs(VACNTs)for liB application were discussed.Furthermore,the mechanisms of charge storage and electrochemical performances in VACNT-based(pristine and composites)anodes and cathodes of liBs were succinctly reviewed.In the end,the existing challenges and future directions in the field were also briefly discussed.

关键词： nanoscale vertically aligned carbon nanotubes(VACNTs) composites lithium-ion batteries(liBs) anodes cathodes

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血浆基质在牙髓根尖周病治疗中的应用

口腔疾病防治 2024年第2期32卷 81-88页

作者：杨雪超李文芝广州医科大学附属口腔医院牙体牙髓科·广东省口腔组织修复与重建工程技术中心·广州市口腔再生医学基础与应用研究重点实验室广东广州510182

血浆基质作为一种自体血液离心产物,具有再生修复的功能,已被广泛应用于口腔颌面部软硬组织再生修复、皮肤美容等领域,并取得了较好的效果。目前,牙髓再生治疗和根尖手术已成为保存牙髓以及保存患牙的主要方法,生物活性材料的应用至关重... 详细信息

血浆基质作为一种自体血液离心产物,具有再生修复的功能,已被广泛应用于口腔颌面部软硬组织再生修复、皮肤美容等领域,并取得了较好的效果。目前,牙髓再生治疗和根尖手术已成为保存牙髓以及保存患牙的主要方法,生物活性材料的应用至关重要,血浆基质作为一种自体生物活性材料,较易获取,可塑性强,具有天然优势。血浆基质可应用于以下情况:①无法刺激根尖出血的根尖孔未闭合年轻恒牙的牙髓血运重建术;②存在骨缺损的根尖屏障术及大面积穿孔髓室底或根侧壁修补术;③大面积根尖病变,伴或不伴随牙周疾病患牙的根尖手术。因血浆基质为自身血液来源制品,使用方面无明显禁忌。虽然已有系统综述表明,相比传统血凝块,血浆基质作为天然再生支架,可有效促进牙髓根尖周病的再生性修复。然而,由于血浆基质的特性受不同制备方式的影响,其适用范围有所差异。此外,目前尚缺乏血浆基质长期的临床研究结果,且组织学证据较难获取,仍然需要大量的体内外研究进一步探索。本文将对不同血浆基质在牙髓再生、根尖手术中的骨组织再生等方面的应用进行阐述,以期为临床医生在适应证选择及预后评估时提供参考。

关键词：血浆基质牙髓血运重建术牙髓再生修复根尖手术牙体硬组织修复根尖诱导成形髓室底穿孔修补富血小板血浆富血小板纤维蛋白浓缩生长因子

The Art of Organizing a Piece of English Prose

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河南教育学院学报（哲学社会科学版） 1996年第2期15卷 91-93页

作者： li wenzhi

ＴｈｅＡｒｔｏｆＯｒｇａｎｉｚｉｎｇａＰｉｅｃｅｏｆＥｎｇｌｉｓｈＰｒｏｓｅ￥ＬｉＷｅｎｚｈｉＡｂｓｔｒａｃｔ：ＡｐｉｅｃｅｏｆＥｎｇｌｉｓｈｐｒｏｓｅｉｓｕｓｕａｌｌｙｍａｄｅｕｐｏｆｔｈｒｅｅｍａｉｎｐａｒｔｓ：... 详细信息

ＴｈｅＡｒｔｏｆＯｒｇａｎｉｚｉｎｇａＰｉｅｃｅｏｆＥｎｇｌｉｓｈＰｒｏｓｅ￥ＬｉＷｅｎｚｈｉＡｂｓｔｒａｃｔ：ＡｐｉｅｃｅｏｆＥｎｇｌｉｓｈｐｒｏｓｅｉｓｕｓｕａｌｌｙｍａｄｅｕｐｏｆｔｈｒｅｅｍａｉｎｐａｒｔｓ：ｉｎｔｒｏｄｕｃｔｉｏｎ，ｂｏｄｙ...

关键词： The Art of Organizing a Piece of English Prose