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Manipulating Crystal Growth and Secondary Phase PbI_(2)to Enable Efficient and Stable Perovskite Solar Cells with Natural Additives

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Nano-Micro Letters 2024年第9期16卷 432-448页

作者： Yirong wang Yaohui Cheng chunchun Yin Jinming Zhang Jingxuan You Jizheng wang Jinfeng wang Jun Zhang Institute of Chemistry Chinese Academy of Sciences(CAS)Beijing 100190People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Nanjing University Nanjing 210023People’s Republic of China Wuhan Textile University Wuhan 430200People’s Republic of China

In perovskite solar cells(PSCs),the inherent defects of perovskite film and the random distribution of excess lead iodide(PbI_(2))prevent the improvement of efficiency and stability.Herein,natural cellulose is used as the raw material to design a series of cellulose derivatives for perovskite crystallization engineering.The cationic cellulose derivative C-Im-CN with cyano-imidazolium(Im-CN)cation and chloride anion prominently promotes the crystallization process,grain growth,and directional orientation of perovskite.Meanwhile,excess PbI_(2)is transferred to the surface of perovskite grains or formed plate-like crystallites in local domains.These effects result in suppressing defect formation,decreasing grain boundaries,enhancing carrier extraction,inhibiting non-radiative recombination,and dramatically prolonging carrier lifetimes.Thus,the PSCs exhibit a high power conversion efficiency of 24.71%.Moreover,C-Im-CN has multiple interaction sites and polymer skeleton,so the unencapsulated PSCs maintain above 91.3%of their initial efficiencies after 3000 h of continuous operation in a conventional air atmosphere and have good stability under high humidity conditions.The utilization of biopolymers with excellent structure-designability to manage the perovskite opens a state-of-the-art avenue for manufacturing and improving PSCs.

关键词： Perovskite Solar cells Defect passivation Biomass additives Crystal orientation

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Mutations and intron polymorphisms in voltage-gated sodium channel genes of different geographic populations of Culex pipiens pallens/ Culex pipiens quinquefasciatus in China

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贫困所致传染病(英文) 2024年第2期13卷 1-11页

作者： Li Wenyu Ma Delong Mu Qunzheng Zhou Xinxin Hua Dongdong Zhao chunchun Liu Qiyong wang Jun Meng Fengxia State Key Laboratory of Infectious Disease Prevention and Control Department of Vector Biology and Control National Institute for Communicable Disease Control and Prevention Chinese Center for Disease Control and Prevention WHO Collaborating Centre for Vector Surveillance and Management Beijing People’s Republic of China Ningxia Center for Disease Prevention and Control YinChuan NingXia People’s Republic of China Jinan Shizhong Center for Disease Control and Prevention Jinan Shandong China Vanke School of Public Health Tsinghua University Beijing People’s Republic of China Weifang No. People’s Hospital Weifang Shandong People’s Republic of China Beijing Daxing Center for Disease Control and Prevention Beijing People’s Republic of China Jinan Second Maternal and Child Health Hospital Jinan Shandong China

Background Culex pipiens pallens andCulex pipiens quinquefasciatus are the dominant species ofCulex mosquitoes in China and important disease vectors. Long-term use of insecticides can cause mutations in the voltage-gated sodium channel (vgsc) gene of mosquitoes, but little is known about the current status and evolutionary origins ofvgsc gene in different geographic populations. Therefore, this study aimed to determine the current status ofvgsc genes inCx. p. pallens andCx. p. quinquefasciatus in China and to investigate the evolutionary inheritance of neighboring downstream introns of thevgsc gene to determine the impact of insecticides on long-term evolution.Methods Sampling was conducted from July to September 2021 in representative habitats of 22 provincial-level administrative divisions in China. Genomic DNA was extracted from 1308 mosquitoes, the IIS6 fragment of thevgsc gene on the nerve cell membrane was amplified using polymerase chain reaction, and the sequence was used to evaluate allele frequency and knockdown resistance (kdr) frequency. MEGA 11 was used to construct neighborjoining (NJ) tree. PopART was used to build a TCS network.Results There were 6 alleles and 6 genotypes at the L1014 locus, which included the wild-type alleles TTA/L and CTA/L and the mutant alleles TTT/F, TTC/F, TCT/S and TCA/S. The geographic populations with akdr frequency less than 20.00% were mainly concentrated in the regions north of 38° N, and the geographic populations with akdr frequency greater than 80.00% were concentrated in the regions south of 30° N.kdr frequency increased with decreasing latitude. And within the same latitude, the frequency ofkdr in large cities is relatively high. Mutations were correlated with the number of introns. The mutant allele TCA/S has only one intron, the mutant allele TTT/F has three introns, and the wild-type allele TTA/L has 17 introns.Conclusions Cx. p. pallens andCx. p. quinquefasciatus have developed resistance to insecticides in most regions of China. The neighboring downstream i

关键词： Culex pipiens pallens Culex pipiens quinquefasciatus vgsc gene Mutation Frequency Intron Haplotype China

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Effect of rice cultivar on greenhouse-gas emissions from rice-fish co-culture

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The Crop Journal 2024年第3期12卷 888-896页

作者： Kexin Xie Mengjie wang Xiaodan wang Fengbo Li chunchun Xu Jinfei Feng Fuping Fang China National Rice Research Institute Hangzhou 310006ZhejiangChina

In aquaculture,co-culturing rice with fish may mitigate greenhouse-gas emissions.In this study,co-culture of four rice cultivars in a laboratory-scale rice–fish system reduced CH_(4)and N_(2)O emissions relative to fish monoculture.Differences in CH_(4)and N_(2)O emissions among rice cultivars primarily stem from the differential effects of rice plants on plant-mediated CH_(4)transport,CH_(4)oxidation and nitrogen absorption.

关键词： Greenhouse gas emissions Aquaculture Rice-fish system Rice cultivar

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Eco-friendly fractionation of natural straws:sustainable ultralong room-temperature phosphorescence and super anti-ultraviolet materials

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Science China Chemistry 2024年第7期67卷 2373-2381页

作者： Zhenghao Xia Jingxuan You Haojie An Yirong wang Jinming Zhang chunchun Yin Yaohui Cheng Kunfeng Jin Jun Zhang CAS Key Laboratory of Engineering Plastics Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China HongDa Research Institute Co. Ltd.Beijing 100176China Key National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

We demonstrate a new green solvent consisting of ionic liquid and polyol to achieve a selective fractionation of lignin from biomass.The lignin from corn straw is rich in syringyl unit and phenolic hydroxyl group,resulting in excellent room-temperature phosphorescence(RTP)performance,antioxidation property and long-term photostability.Flexible film,fiber,aerogel and coatings with an ultralong RTP lifetime of 0.654 s are obtained.The lignin from corn straw completely blocks UV light of290–400 nm at an extremely low usage due to many p-coumarate units.When the content is as low as 1.54 mg/g,which is two orders of magnitude lower than the previous reports,the corresponding sunscreen cream has a super-high sun protection factor(SPF)of 183.9.More importantly,the lignin self-assembles into nanospheres of 250–350 nm,preventing penetration into the skin.Such easily-available,abundant,low-cost,safe and natural lignin provides an innovative avenue for sustainable optical function materials.

关键词： lignin phosphorescence anti-ultraviolet biomass ionic liquids

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Self-actuating protection mechanisms for safer lithium-ion batteries

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Journal of Energy Chemistry 2024年第7期94卷 181-198页

作者： Yang Luo chunchun Sang Kehan Le Hao Chen Hui Li Xinping Ai Hubei Key Lab of Electrochemical Power Sources College of Chemistry&Molecular ScienceWuhan UniversityWuhan 430072HubeiChina state Key Laboratory of New Textile Materials&Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200HubeiChina

Safety issue is still a problem nowadays for the large-scale application of lithium-ion batteries(LIBs)in electric vehicles and energy storage stations.The unsafe behaviors of LIBs arise from the thermal run-away,which is intrinsically triggered by the overcharging and overheating.To improve the safety of LIBs,various protection strategies based on self-actuating reaction control mechanisms(SRCMs)have been proposed,including redox shuttle,polymerizable monomer additive,potential-sensitive separator,thermal shutdown separator,positive-temperature-coefficient electrode,thermally polymerizable addi-tive,and reversible thermal phase transition electrolyte.As build-in protection mechanisms,these meth-ods can sensitively detect either the temperature change inside battery or the potential change of the electrode,and spontaneously shut down the electrode reaction at risky conditions,thus preventing the battery from going into thermal runaway.Given their advantages in enhancing the intrinsic safety of LIBs,this paper overviews the research progresses of SRCMs after a brief introduction of thermal runaway mechanism and limitations of conventional thermal runaway mitigating measures.More importantly,the current states and issues,key challenges,and future developing trends of SRCTs are also discussed and outlined from the viewpoint of practical application,aiming at providing insights and guidance for developing more effective SRCMs for LIBs.

关键词： Li-ion battery Safety Thermal runaway Thermal protection Overcharge protection

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Ta_(3)N_(5)/CdS Core–Shell S‑scheme Heterojunction Nanofibers for Efficient Photocatalytic Removal of Antibiotic Tetracycline and Cr(VI):Performance and Mechanism Insights

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Advanced Fiber Materials 2023年第3期5卷 994-1007页

作者： Shijie Li Mingjie Cai chunchun wang Yanping Liu Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province National Engineering Research Center for Marine AquacultureCollege of Marine Science and TechnologyZhejiang Ocean UniversityZhejiang ProvinceZhoushan 316022China Institute of Innovation and Application Zhejiang Ocean UniversityZhejiang ProvinceZhoushan 316022China

Ta_(3)N_(5)/CdS core–shell S-scheme heterojunction nanofibers are fabricated by in situ growing CdS nanodots on Ta_(3)N_(5) nanofib-ers via a simple wet-chemical method.These Ta_(3)N_(5)/CdS nanofibers not only affords superior photocatalytic tetracycline degradation and mineralization performance,but also cause an efficient photocatalytic Cr(VI)reduction performance.The creation of favorable core–shell fiber-shaped S-scheme hetero-structure with tightly contacted interface and the maximum interface contact area promises the effective photo-carrier disintegration and the optimal photo-redox capacity synchronously,thus leading to the preeminent photo-redox ability.Some critical environmental factors on the photo-behavior of Ta_(3)N_(5)/CdS are also evaluated in view of the complexity of the authentic aquatic environment.The degradation products of tetracycline were confirmed by HPLC–MS analyses.Furthermore,the effective decline in eco-toxicity of TC intermediates is confirmed by QSAR calculation.This work provides cutting-edge guidelines for the design of high-performance Ta_(3)N_(5)-based S-scheme heterojunction nanofibers for environment restoration.

关键词： Ta_(3)N_(5)/CdS Electrospinning S-scheme heterojunction Core–shell hetero-structure Cr(VI)reduction Antibiotic degradation

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Sustainable, thermoplastic and hydrophobic coating from natural cellulose and cinnamon to fabricate eco-friendly catering packaging

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Green Energy & Environment 2024年第5期9卷 927-936页

作者： Rumeng Xu chunchun Yin Jingxuan You Jinming Zhang Qinyong Mi Jin Wu Jun Zhang CAS Key Laboratory of Engineering Plastics Institute of ChemistryChinese Academy of Sciences(CAS)Beijing100190China University of Chinese Academy of Sciences Beijing100049China

Non-degradable polymers cause serious environmental pollution problem,such as the widely-used while unrecyclable coatings which signiﬁcantly affect the overall degradation performance of products.It is imperative and attractive to develop biodegradable functional coatings.Herein,we proposed a novel strategy to successfully prepare biodegradable,thermoplastic and hydrophobic coatings with high transparence and biosafety by weakening the interchain interactions between cellulose chain.The natural cellulose and cinnamic acid were as raw materials.Via reducing the degree of polymerization(DP)of cellulose and regulating the degree of substitution(DS)of cinnamate moiety,the obtained cellulose cinnamate(CC)exhibited not only the thermalﬂow behavior but also good biodegradability,which solves the conﬂict between the thermoplasticity and biodegradability in cellulose-based materials.The glass transition temperature(T_(g))and thermalﬂow temperature(T_(f))of the CC could be adjusted in a range of 150–200℃ and 180–210℃,respectively.The CC with DS<1.2 and DP≤100 degraded more than 60%after an enzyme treatment for 7 days,and degraded more than 80%after a composting treatment for 42 days.Furthermore,CC had no toxicity to human epidermal cells even at a high concentration(0.5 mg mL^(-1)).In addition,CC could be easily fabricated into multifunctional coating with high hydrophobicity,thermal adhesion and high transparence.Therefore,after combining with cellophane and paperboard,CC coating with low DP and DS could be used to prepare fully-biodegradable heat-sealing packaging,art paper,paper cups,paper straws and food packaging boxes.

关键词： Thermoplastic coating Bio-degradable adhesive Natural products Cellulose Eco-friendly packaging

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Rationally designed Ta_(3)N_(5)/BiOCl S-scheme heterojunction with oxygen vacancies for elimination of tetracycline antibiotic and Cr(Ⅵ):Performance,toxicity evaluation and mechanism insight

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Journal of Materials Science & Technology 2022年第28期123卷 177-190页

作者： Shijie Li Mingjie Cai chunchun wang Yanping Liu Neng Li Peng Zhang Xin Li Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province National Engineering Research Center for Marine AquacultureCollege of Marine Science and TechnologyZhejiang Ocean UniversityZhoushan 316022China Institute of Innovation&Application Zhejiang Ocean UniversityZhoushan 316022China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China State Center for International Cooperation on Designer Low-Carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China

S-scheme heterojunction photocatalysts have been the“stars”in the field of photocatalysis.Herein,a novel S-scheme heterojunction of Ta_(3)N_(5)/BiOCl with oxygen vacancies(OVs)was fabricated via a facile method.The charge separation and transport mechanism of this Ta_(3)N_(5)/BiOCl S-scheme heterojunction was verified by the analyses of band energy structures,active species,photoelectric behaviors and DFT theoretical calculation.Compared with Ta_(3)N_(5)and BiOCl,the Ta_(3)N_(5)/BiOCl unveils substantially upgraded photocatalytic property under visible light,and the photocatalytic efficiency for removal of tetracycline(TC)and hexavalent chromium(Cr(VI))reaches 89.6%and 91.6%,respectively.The substantial enhancement of the photocatalytic activity is attributed to the synergistic effect of the S-scheme hetero-structure and oxygen vacancies,which improves the visible-light absorption,while promoting the spatial separation of charge carriers with the optimum redox capacity,thereby boosting the production of active species for catalytic reactions.The TC degradation pathway is deduced and the toxicity evolution of TC is appraised using the QSAR method.In a nutshell,this work gives a deep understanding of the photocatalytic mechanism based on Ta_(3)N_(5)/BiOCl as well as presents a newfangled thought for developing highly efficient S-scheme heterojunction photocatalysts for water decontamination.

关键词： Ta_(3)N_(5)/BiOCl S-scheme heterojunction Oxygen vacancy Visible-light photocatalysis Antibiotic degradation Cr(Ⅵ)reduction

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Preparation, characterization, antimicrobial and cytotoxicity studies of copper/zincloaded montmorillonite

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Journal of Animal Science and Biotechnology 2017年第3期8卷 670-676页

作者： Lefei Jiao Fanghui Lin Shuting Cao chunchun wang Huan Wu Miaoan Shu Caihong Hu Animal Science College Zhejiang UniversityKey Laboratory of Animal Feed and Nutrition of Zhejiang ProvinceHangzhou 310058People's Republic of China Key Laboratory of Animal Nutrition and Feed in East China Ministry of AgricultureHangzhou 310058People's Republic of China

Background： A series of modified montmorillonites（Mt） including zinc-loaded Mt（Zn-Mt）, copper-loaded Mt（Cu-Mt）, copper/zinc-loaded Mt with different Cu/Zn ratio（Cu/Zn-Mt-1, Cu/Zn-Mt-2, Cu/Zn-Mt-3） were prepared by an ion-exchange reaction, and characterized using X-ray diffraction（XRD）, fourier transformed infrared spectroscopy（FTIR） and transmission electron microscopy（TEM）. The specific surface areas, antimicrobial activity and cytotoxicity of the modified Mt were investigated.Results： In the modified Mt, hydrated Cu ions and Zn ions were exchanged in the interlayer space of Mt and the particles were irregular shapes. The results showed that Cu/Zn-Mt enhanced antibacterial and antifungal activity compared with Zn-Mt and Cu-Mt possibly due to the synergistic effect between Cu and Zn. Among the Cu/Zn-Mt with different Cu/Zn raitos, Cu/Zn-Mt with a Cu/Zn ratio of 0.98 or 0.51 showed higher antimicrobial activity against gram-negative bacteria（Escherichia coli）, gram-positive bacteria（Staphylococcus aureus）, fungi（Candida albicans）.Moreover, the antimicrobial activity of Cu/Zn-Mt was correlated with its specific surface area. Cytotoxicity studies on IPEC-J2 cell showed a slight cytotoxicity of Cu/Zn-Mt.Conclusions： The current data provide clear evidence that in terms of its antimicrobial activity and relatively low toxicity, the Cu/Zn-Mt holds great promise for applications in animal husbandry.

关键词： Antimicrobial reagent Modified montmorillonites Synergistic antimicrobial effect

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Effects of dietary tributyrin on intestinal mucosa development,mitochondrial function and AMPK-mTOR pathway in weaned pigs

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Journal of Animal Science and Biotechnology 2020年第2期11卷 602-610页

作者： chunchun wang Shuting Cao Zhuojun Shen Qihua Hong Jie Feng Yan Peng Caihong Hu Key Laboratory of Molecular Animal Nutrition Ministry of EducationAnimal Science CollegeZhejiang UniversityYu Hang Tang Rd No.866Hangzhou 310058People’s Republic of China Shanghai Menon Animal Nutrition Technology Co.Ltd. Shanghai 201807China

Background:The objective of this experiment was to investigate the influence of dietary tributyrin on intestinal mucosa development,oxidative stress,mitochondrial function and AMPK-mTOR signaling pathway.Methods:Seventy-two pigs were divided into two treatments and received either a basal diet or the same diet supplemented with 750 mg/kg tributyrin.Each treatment has six replicates of six pigs.After 14 days,6 pigs from each treatment were selected and the jejunal samples were collected.Results:Results showed that supplemental tributyrin increased(P<0.05)villus height and villus height:crypt depth of weaned pigs.Pigs fed tributyrin had greater(P<0.05)RNA/DNA and protein/DNA ratios than pigs on the control group.The mRNA levels of sodium glucose transport protein-1 and glucose transporter-2 in the jejunum were upregulated(P<0.05)in pigs fed the tributyrin diet.Dietary tributyrin supplementation lowered(P<0.05)the malondialdehyde and hydrogen peroxide(H2O2)content in jejunum,enhanced(P<0.05)the mitochondrial function,as demonstrated by decreased(P<0.05)reactive oxygen species level and increased(P<0.05)mitochondrial membrane potential.Furthermore,tributyrin increased(P<0.05)mitochondrial DNA content and the mRNA abundance of genes related to mitochondrial functions,including peroxisomal proliferator-activated receptor-γcoactivator-1α,mitochondrial transcription factor A,nuclear respiratory factor-1 in the jejunum.Supplementation with tributyrin elevated(P<0.05)the phosphorylation level of AMPK and inhibited(P<0.05)the phosphorylation level of mTOR in jejunum compared with the control group.Conclusions:These findings suggest that dietary supplementation with tributyrin promotes intestinal mucosa growth,extenuates oxidative stress,improves mitochondrial function and modulates the AMPK-mTOR signal pathway of weaned pigs.

关键词： AMPK-mTOR signaling pathway Intestinal mucosa development Mitochondrial function Tributyrin Weaned pigs

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