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Multilayer two-dimensional lignin/ZnO composites with excellent anti-UV aging properties for polymer films

Green Chemical Engineering 2022年第4期3卷 338-348页

作者： lizhu zhang Yuanyuan Wang Dongjie Yang Huan Wang Weifeng Liu Zhixian Li School of Chemistry and Chemical Engineering Guangdong Provincial Key Lab of Green Chemical Product TechnologyGuangdong Provincial Engineering Research Center for Green Fine ChemicalsSouth China University of TechnologyGuangzhou510640China Guangzhou Key Laboratory of Sensing Materials and Devices Centre for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou510006China

Lignin is a kind of natural green polymer with abundant active functional groups and designable molecular structure.In this work,the quaternized lignosulfonate(QLS)with amphoteric characteristic was prepared through chemical modification using lignosulfonate sodium(LS).Then,a lignin-confined multilayered two-dimensional composite(QLS/ZnO)was prepared by one-step dynamic hydrothermal method using QLS,zinc nitrate,and hexamethylenetetramine.The QLS/ZnO has a regular pie-shaped structure,which is composed of 3-5 layers of two-dimensional nanosheets with a thickness of~10 nm.It shows excellent ultraviolet light absorption performance and active photoelectron scavenging performance,and thus showing great application potential in polymer materials.The water polyurethane(WPU)and polyvinyl alcohol(PVA)films showed excellent UV shielding performance and good mechanical properties when doped with the QLS/ZnO.The tensile strength of WPU t 0.6 wt%QLS/ZnO and PVA t 0.8 wt%QLS/ZnO composite films is increased by 49%and 24%,respectively,and the elongation at break is increased by 138%and 33%.Furthermore,the composite films showed excellent anti-UV aging resistance after being aged under strong UV irradiation for 14 days.This work is of great significance to the high-value application of industrial lignin in the field of nano-functional materials.

关键词： Lignin ZnO Composites Polyurethane Anti-UV aging

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Global seaweed farming and processing in the past 20 years

Food Production, Processing and Nutrition

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Food Production, Processing and Nutrition 2022年第1期4卷 289-318页

作者： lizhu zhang Wei Liao Yajun Huang Yuxi Wen Yaoyao Chu Chao Zhao College of Food Science Fujian Agriculture and Forestry UniversityFuzhou 350002China College of Marine Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002China Key Laboratory of Marine Biotechnology of Fujian Province Institute of OceanologyFujian Agriculture and Forestry UniversityFuzhouChina

Seaweed has emerged as one of the most promising resources due to its remarkable adaptability, short development period, and resource sustainability. It is an effective breakthrough to alleviate future resource crises. Algal resources have reached a high stage of growth in the past years due to the increased output and demand for seaweed worldwide. Several aspects global seaweed farming production and processing over the last 20 years are reviewed, such as the latest situation and approaches of seaweed farming. Research progress and production trend of various seaweed application are discussed. Besides, the challenges faced by seaweed farming and processing are also analyzed, and the related countermeasures are proposed, which can provide advice for seaweed farming and processing. The primary products, extraction and application, or waste utilization of seaweed would bring greater benefits with the continuous development and improvement of applications in various fields.

关键词： Algal farming Algal processing Breeding technology Extraction technology

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Single-phase bimetal sulfide or metal sulfide heterojunction:Which one is better for reversible oxygen electrocatalyst?

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Journal of Energy Chemistry 2022年第11期31卷 420-428,I0012页

作者： Jingjing Cai Huijun Liu Yulin Luo Yuqing Xiong lizhu zhang Sheng Wang Kang Xiao Zhao-Qing Liu School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Key Laboratory for Clean Energy and Materials Guangzhou UniversityGuangzhou 510006GuangdongChina Department of Materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA

Bimetallic sulfides,integrating the merits of individual components,are ideal structures for efficient electrocatalysis.However,for bimetallic sulfides including metal sulfide heterojunctions(MSH)and singlephase bimetallic sulfides(SBS),it is still unclear about which one has better catalytic activity toward reversible oxygen catalysis and its difference on catalytic mechanism.In this work,we demonstrate a bimetallic sulfide electrocatalyst that could transform from metal sulfide heterojunction(CoS/FeS)to single-phase bimetallic sulfide(CoFeS_(2))through a facile temperature control strategy.The single-phase bimetallic sulfide(CoFeS_(2))affords high intrinsic activity,fast reaction kinetics and superior durability toward oxygen evolution reaction(OER)and oxygen reduction reaction(ORR).Density functional theory(DFT)simulations reveal that the(CoFeS_(2))has homogeneous electron distribution of the CoFeS_(2)structure,improves the central energy level of d band,and optimizes the O*and OOH*intermediate and efficiently reduces the energy barrier of the reaction rate-determining step(RDS).The assembled rechargeable zincair battery is more stable than the Pt/C and IrO_(2) assemblies due to the excellent electrocatalytic activity and stability of CoFeS_(2)/NC,suggesting that it has potential for use in practical applications.

关键词： Metal sulfide Sulfide heterojunction OER ORR Zinc-air batteries

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Alcohol consumption promotes arsenic absorption but reduces tissue arsenic accumulation in mice

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Eco-Environment & Health 2023年第3期2卷 107-116页

作者： Hongyu Wang Albert L.Juhasz Yaosheng zhang lizhu zhang Lena Q.Ma Dongmei Zhou Hongbo Li State Key Laboratory of Pollution Control and Resource Reuse Jiangsu Key Laboratory of Vehicle Emissions ControlSchool of the EnvironmentNanjing UniversityNanjing 210023China Future Industries Institute University of South AustraliaMawson LakesSouth Australia 5095Australia Department of Nanxin Pharm Nanjing 210000China Institute of Soil and Water Resources and Environmental Science College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China

Alcohol consumption alters gut microflora and damages intestinal tight junction barriers,which may affect arsenic(As)oral bioavailability.In this study,mice were exposed to arsenate in the diet(6μg/g)over a 3-week period and gavaged daily with Chinese liquor(0.05 or 0.10 mL per mouse per day).Following ingestion,78.0%and 72.9%of the total As intake was absorbed and excreted via urine when co-exposed with liquor at daily doses of 0.05 or 0.10 mL,significantly greater than when As was supplied alone(44.7%).Alcohol co-exposure significantly altered gut microbiota but did not significantly alter As biotransformation in the intestinal tract or tissue.Significantly lower relative mRNA expression was observed for genes encoding for tight junctions in the ileum of liquor co-exposed mice,contributing to greater As bioavailability attributable to enhanced As absorption via the intestinal paracellular pathway.However,As concentration in the liver,kidney,and intestinal tissue of liquortreated mice was decreased by 24.4%-42.6%,27.5%-38.1%,and 28.1%-48.9%compared to control mice.This was likely due to greater renal glomerular filtration rate induced by alcohol,as suggested by significantly lower expression of genes encoding for renal tight junctions.In addition,in mice gavaged daily with 0.05 mL liquor,the serum antidiuretic hormone level was significantly lower than control mice(2.83±0.59 vs.5.40±1.10 pg/mL),suggesting the diuretic function of alcohol consumption,which may facilitate As elimination via urine.These results highlight that alcohol consumption has a significant impact on the bioavailability and accumulation of As.

关键词： Arsenic speciation Alcohol consumption Oral bioavailability Tissue accumulation Tight junctions

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Effect of AlCl_3 concentration on nanoparticle removal by coagulation

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Journal of Environmental Sciences 2015年第12期27卷 103-109页

作者： lizhu zhang Jingchun Mao Qing Zhao Shaobo He Jun Ma Chemistry Department of Science School Harbin Institute of Technology Institute of Applied Ecology Chinese Academy of Sciences School of Municipal and Environmental Engineering Harbin Institute of Technology

In recent years,engineered nanoparticles,as a new group of contaminants emerging in natural water,have been given more attention AlCl3 In order to understand the behavior of nanoparticles in the conventional water treatment process,three kinds of nanoparticle suspensions,namely multi-walled carbon nanotube-humic acid（MWCNT-HA）,multiwalled carbon nanotube-N,N-dimethylformamide（MWCNT-DMF） and nano TiO2-humic acid（TiO2-HA） were employed to investigate their coagulation removal efficiencies with varying aluminum chloride（AlCl3） concentrations AlCl3 Results showed that nanoparticle removal rate curves had a reverse ＂U＂ shape with increasing concentration of aluminum ion（Al^（3＋））AlCl3 More than 90% of nanoparticles could be effectively removed by an appropriate Al^（3＋） concentration AlCl3 At higher Al^（3＋） concentration,nanoparticles would be restabilized AlCl3 The hydrodynamic particle size of nanoparticles was found to be the crucial factor influencing the effective concentration range（ECR） of Al^（3＋） for nanoparticle removal AlCl3 The ECR of Al^（3＋） followed the order MWCNT-DMF 〉 MWCNT-HA 〉 TiO2-HA,which is the reverse of the nanoparticle size trend AlCl3 At a given concentration,smaller nanoparticles carry more surface charges,and thus consume more coagulants for neutralization AlCl3 Therefore,over-saturation occurred at relatively higher Al^（3＋） concentration and a wider ECR was obtained AlCl3 The ECR became broader with increasing p H because of the smaller hydrodynamic particle size of nanoparticles at higher p H values AlCl3 A high ionic strength of Na Cl can also widen the ECR due to its strong potential to compress the electric double layer AlCl3 It was concluded that it is important to adjust the dose of Al^（3＋） in the ECR for nanoparticle removal in water treatment.

关键词： Nanoparticles Coagulation Effective coagulation concentration Al^（3＋）

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An event summarizing algorithm based on the timeline relevance model in Sina Weibo

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Science China(Information Sciences) 2018年第12期61卷 184-186页

作者： Kai LEI lizhu zhang Ying LIU Ying SHEN Chenwei LIU Qian YU Weitao WENG Shenzhen Key Lab for Cloud Computing Technology & Applications (SPCCTA) School of Electronics and Computer Engineering Peking University

Dear editor,Depicting superior punctuality and originality,Weibo has become increasingly critical and influential in China for online information acquisition and sharing. However, very few research has studied Weibo to investigate event summarizing even though most of the published Weibos are event-driven. Besides, we observe that the existing methods are unsuitable for process-

关键词： IDF TF HAC An event summarizing algorithm based on the timeline relevance model in Sina Weibo

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基于云南资源特色的生药学综合性实验教学的设计

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中国中医药现代远程教育 2024年第10期22卷 41-44页

作者：温敏张丽珠黄李淑馨王韦云南民族大学民族医药学院云南昆明650504

生药学实验课是药学的重要专业课程,该实验课程的教学内容和改革对培养药学人才具有重要作用。此文针对目前生药学实验教学以验证性、重复性教学为主的模式积极开展基于云南特色生药资源的生药学综合性实验教学探索,分别对此教学改革的... 详细信息

生药学实验课是药学的重要专业课程,该实验课程的教学内容和改革对培养药学人才具有重要作用。此文针对目前生药学实验教学以验证性、重复性教学为主的模式积极开展基于云南特色生药资源的生药学综合性实验教学探索,分别对此教学改革的前期实验能力储备、实验准备、实验过程、实验报告和总结进行论述。此实验教学改革的目的为使学生在掌握生药学基础实验的基础上具备综合能力及科研创新能力。

关键词：生药学实验实验教学资源特色教学改革

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变电站保护装置压板分析与投退注意事项

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电工技术 2024年第10期 184-186,190页

作者：郁景礼郭修杰张峰张莉珠何健明广东电网有限责任公司佛山供电局广东佛山528000

以某220 kV变电站运行人员因万用表档位选择不当导致的电气二次误操作事件为例,阐述变电站保护装置压板分类和主要功能投退方式,并对功能硬压板开入回路和出口硬压板开出回路的回路特点和电位开展具体分析,结合现场实际提出保护装置压... 详细信息

以某220 kV变电站运行人员因万用表档位选择不当导致的电气二次误操作事件为例,阐述变电站保护装置压板分类和主要功能投退方式,并对功能硬压板开入回路和出口硬压板开出回路的回路特点和电位开展具体分析,结合现场实际提出保护装置压板投退防误动预控措施。

关键词：电气二次误操作压板分类主要功能投退方式回路分析防误动预控措施

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Enhanced removal of organics by permanganate preoxidation using tannic acid as a model compound-Role of in situ formed manganese dioxide

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Journal of Environmental Sciences 2009年第7期21卷 872-876页

作者： zhang lizhu MA Jun LI Xin WANG Shutao School of Science Harbin Institute of Technology Harbin 150090 China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China

The effect of permanganate preoxidation on organic matter removal during the coagulation with aluminum chloride was investigated using tannic acid as a model compound. Results showed that a small amount of KMnO4 （0.75 mg/L） increased the removal efficiency of tannic acid up to 20%, as compared to the process of coagulation by aluminum chloride alone. The key factor enhancing the removal efficiency of tannic acid in preoxidation process was the in situ formation of a reductant manganese dioxide. The complexation model was used to describe the reaction between MnO2 and tannic acid. Under weak pH condition, tannic acid was difficult to be adsorbed by MnO2 due to the static electrical repulsive forces. The presence of Ca2＋ served as a bridge to hold the negative charged MnO2 and tannic acid together, which could be a crucial factor influencing tannic acid adsorption by in-situ manganese dioxide.

关键词： KMnO4 MnO2 adsorption coagulation oxidation tannic acid

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Correction:Global seaweed farming and processing in the past 20 years

Food Production, Processing and Nutrition

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Food Production, Processing and Nutrition 2022年第1期4卷 365-365页

作者： lizhu zhang Wei Liao Yajun Huang Yuxi Wen Yaoyao Chu Chao Zhao College of Food Science Fujian Agriculture and Forestry University350002 FuzhouChina College of Marine Sciences Fujian Agriculture and Forestry University350002 FuzhouChina Key Laboratory of Marine Biotechnology of Fujian Province Institute of OceanologyFujian Agriculture and Forestry UniversityFuzhouChina

https://***/articles/10.1186/s43014-022-00103-2.In the original publication of this article(zhang et al.,2022),the author affiliations 1 and 2 need to be exchanged.

关键词： farming processing Global

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