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International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 1996-2005页

作者： wenwen han Hongying Yang Linlin Tong Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

The toxic cyanides in cyanide residues produced from cyanidation process for gold extraction are harmful to the *** is one of the main minerals existing in cyanide *** this work,the interaction of cyanide with pyrite and the decyanation of pyrite cyanide residue were *** revealed that high pH value,high cyanide concentration,and high pyrite dosage promoted the interaction of cyanide with *** cyanidation of pyrite was pseudo-second-order with respect to *** decyanation of pyrite cyanide residue by Na_(2)SO_(3)/air oxidation was *** cyanide removal efficiency was 83.9% after 1 h of reaction time under the optimal conditions of pH value of 11.2,SO_(3)^(2-) dosage of 22 mg·g^(-1),and air flow rate of 1.46 L·min^(-1).X-ray photoelectron spectroscopy analysis of the pyrite samples showed the formation of Fe(Ⅲ)and FeSO_(4) during the cyanidation *** cyanide that adsorbed on the pyrite surface after cyanidation mainly existed in the forms of free cyanide(CN^(-))and ferrocyanide(Fe(CN)_(6)^(4-)),which were effectively removed by Na_(2)SO_(3)/air *** the decyanation process,air intake promoted pyrite oxidation and weakened cyanide adsorption on the pyrite *** study has practical significance for gold enterprises aiming to mitigate the environmental impact related to cyanide residues.

关键词： pyrite cyanide decyanation sodium sulfite/air oxidation cyanide residue

Influence of the post-treatment of HZSM-5 zeolite on catalytic performance for alkylation of benzene with methanol

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Chinese Journal of Chemical Engineering 2017年第12期25卷 1777-1783页

作者： Qingtao Wang wenwen han Hualei Hu Jinghui Lyu Xiaolong Xu Qunfeng Zhang Hongjing Wang Xiaonian Li Institute of Industrial Catalysis of Zhejiang University of Technology State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology Hangzhou 310032 China

The porous material HZSM-5 zeolite with micro-mesopore hierarchical porosity was prepared by post-treatment （combined alkali treatment and acid leaching） of parent zeolite and its catalytic performance for benzene alkylation with methanol was investigated. The effect of post-treatment on the textural properties was characterized by various techniques （including ICP-AES, XRD, nitrogen sorption isotherms, SEM, NH3-TPD, Py-IR and TG）. The results indicated that the post-treatment could modify the structural and acidic properties of HZSM-5 zeolite. In this procedure, not only additional mesopores were created by selective extraction of silicon but also the acidity was tuned. Consequently, the modified HZSM-5 zeolite showed larger external surface area with less acid sites as compared to the parent zeolite. It was found out that the modified zeolite exhibited a higher benzene conversion and xylene selectivity for alkylation of benzene with methanol as well as excellent life span of the catalyst than conventional ones. This can be explained by the facts that the presence of additional mesopores improved the diffusion property in the reactions. Furthermore, the modified zeolite showed an appropriate Bronsted acidity for effective suppression of the side reaction of methanol to olefins, thus reduced the accumulation of coke on the HZSM-5 zeolite, which was favorable for the catalyst stability. In comparison with the parent HZSM-5 zeolite, the modified zeolite by alkali treatment and acid leaching showed better performance for the benzene alkylation with methanol.

关键词： HZSM-5 zeolite Hierarchical porosity Post-treatment Benzene alkylation with methanol

A Degradable Quaternary Ammonium-Based Pesticide Safe for Humans

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CCS Chemistry 2024年第6期6卷 1499-1511页

作者： wenwen han Xiao-Qi Xu Xiaodong Lian Yanji Chu Yapei Wang Key Laboratory of Advanced Light Conversion Materials and Biophotonics Department of ChemistryRenmin University of ChinaBeijing 100872

Reducing the emission of agrochemicals hazardous to the environment and human health is one of the key targets of the UN’s Sustainable Development Goal ***,we report a kind of quaternary ammonium pesticides with an acid-cleavable silaketal linkage on their backbones that enables control of *** pesticides possess outstanding bactericidal and insecticidal properties but become harmless to humans and other organisms after *** on the conditions of use,the hydrolytic process can be controlled over the time range of 10 min to 3 *** laboratory simulations and agricultural field demonstrations confirm that these pesticides can effectively protect crops from bacterial diseases and *** the sametime,single-dose intragastric administration using diisopropylsilyloxy bisquaternary ammonium salt 9(ISBQAS-9)in mice demonstrates its safety for multiple *** to the advantages of controllable degradability,environmental friendliness,and the low financial cost of these pesticides,this welldesigned strategy holds great promise for the generation of environmentally harmless pesticides and the development of green agriculture.

关键词： antimicrobial materials degradable pesticides insecticidal materials quaternary ammonium surfactants stimulus-cleavable chemistry

Benzene alkylation with methanol over phosphate modified hierarchical porous ZSM-5 with tailored acidity

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Chinese Journal of Chemical Engineering 2017年第9期25卷 1187-1194页

作者： Jinghui Lyu Hualei Hu Carolyn Tait Jiayao Rui Caiyi Lou Qingtao Wang wenwen han Qunfeng Zhang Zhiyan Pan Xiaonian Li Industrial Catalysis Institute of Zhejiang University of Technology State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology Department of Environmental Engineering Zhejiang University of Technology Department of Chemical and Biochemical Engineering University of Western Ontario

The acidity and acid distribution of hierarchical porous ZSM-5 were tailored via phosphate modification. The catalytic results showed that both benzene conversion and selectivity of toluene and xylene increased with the presence of appropriate amount of phosphorus. Meanwhile, side reactions such as methanol to olefins related with the formation of by-product ethylbenzene formation and isomerization of xylene to meta-xylene were suppressed efficiently. The acid strength and sites amount of Br?nsted acid of the catalyst were crucial for improving benzene conversion and yield of xylene, whereas passivation of external surface acid sites played an important role in breaking thermodynamic equilibrium distribution of xylene isomers.

关键词： Hierarchical porous ZSM-5 Phosphate modification Benzene alkylation with methanol Xylene

Worm-like micelles facilitate the intestinal mucus diffusion and drug accumulation for enhancing colorectal cancer therapy

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Chinese Chemical Letters 2024年第6期35卷 427-432页

作者： Yihan Zhou Duo Gao Yaying Wang Li Liang Qingyu Zhang wenwen han Jie Wang Chunliu Zhu Xinxin Zhang Yong Gan State Key Laboratory of Drug Research and Center of Pharmaceutics Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China School of Chinese Materia Medica Nanjing University of Chinese MedicineNanjing 210023China University of Chinese Academy of Sciences Beijing 100049China NMPA Key Laboratory for Quality Research and Evaluation of Pharmaceutical Excipients National Institutes for Food and Drug ControlBeijing 100050China School of Pharmacy Shanghai University of Traditional Chinese MedicineShanghai 201203China

Local delivery of nanoparticles holds promise for colorectal cancer(CRC)***,the presence of the mucus layer on the epithelium poses a significant challenge to drug delivery,thereby adversely affecting treatment *** is crucial to develop efficient drug delivery carriers that can effectively overcome mucus barriers to treat colorectal ***,we utilized poly(1,4-butadiene)-b-poly(ethylene oxide)polymers to prepare four distinct geometries of polymeric micelles,namely linear micelles(LMs),worm-like micelles(WLMs),large spherical micelles(LSMs),and small spherical micelles(SSMs)to investigate the influence of shape effects on overcoming colonic mucosal *** found that the carriers exhibited diverse shapes while maintaining comparable physicochemical *** these,WLMs had an aspect ratio similar to segmented filamentous bacteria,which exhibited superior mucus penetration ability,leading to prolonged drug release kinetics and faster entry into epithelial cells compared to ***,rectally administrated 10-hydroxycamptothecin-loaded WLMs traversed the colorectal mucus in orthotopic CRC nude mice model,penetrated and accumulated within tumor tissue,and effectively aggregated within cancer cells,thereby inducing significantly robust antitumor outcomes in *** findings underscore the significance of shape design in overcoming colonic mucosal absorption barriers,offering a novel approach for the development of drug delivery carriers tailored for effective tumor therapy.

关键词： Worm-like micelles Mucus penetration Shape dependent Transmucosal delivery Colorectal cancer

Emergence of a novel reassortant avian influenza virus(H10N3) in Eastern China with high pathogenicity and respiratory droplet transmissibility to mammals

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Science China(Life Sciences) 2022年第5期65卷 1024-1035页

作者： Kaituo Liu Pingyun Ding Yuru Pei Ruyi Gao wenwen han Huafen Zheng Zhuxing Ji Miao Cai Jinyuan Gu Xiuli Li Min Gu Jiao Hu Xiaowen Liu Shunlin Hu Pinghu Zhang Xiaobo Wang Xiaoquan Wang Xiufan Liu College of Veterinary Medicine Yangzhou UniversityYangzhou 225009China Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis Yangzhou UniversityYangzhou 225009China Jiangsu Key Laboratory of Zoonosis Yangzhou 225009China Institute of Translational Medicine Key Laboratory of Geriatric Disease Prevention and Control of Jiangsu ProvinceMedical CollegeYangzhou UniversityYangzhou 225009China

Decades have passed since the first discovery of H10-subtype avian influenza virus(AIV) in chickens in 1949,and it has been detected in many species including mammals such as minks,pigs,seals and *** of human infections with H10N8viruses identified in China in 2013 have raised widespread *** novel reassortant H10N3 viruses were isolated from chickens in December 2019 in eastern China during routine surveillance for *** internal genes of these viruses were derived from genotype S(G57) H9N2 and were consistent with H5N6,H7N9 and H10N8,which cause fatal infections in *** viral pathogenicity and transmissibility were further studied in different animal *** two H10N3 isolates had low pathogenicity in chickens and were transmitted between chickens via direct *** viruses were highly pathogenic in mice and could be transmitted between guinea pigs via direct contact and respiratory *** importantly,these viruses can bind to both human-type SAα-2,6-Gal receptors and avian-type SAα-2,3-Gal *** shedding in chickens and good adaptability to mammals of these H10N3 isolates would make it easier to transmit to humans and pose a threat to public health.

关键词： H10N3 H9N2 receptor binding pathogenicity respiratory droplet transmissibility

Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

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Journal of Energy Chemistry 2025年第1期100卷 730-738页

作者： Peng Zheng Wang Zhou Ying Mo Biao Zheng Miaomiao han Qin Zhong wenwen Yang Peng Gao Lezhi Yang Jilei Liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Greater Bay Area Institute for Innovation Hunan University Changsha Research Institute of Mining & Metallurgy Co. LTD.

Hard carbon （HC） has been considered as promising anode material for sodium-ion batteries （SIBs）.The optimization of hard carbon’s microstructure and solid electrolyte interface （SEI） property are demonstrated effective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the effects of boron doping on hard carbon’s microstructure and interface chemistry.A variety of structure characterizations show that appropriate amount of boron doping can increase the size of closed pores via rearrangement of carbon layers with improved graphitization degree,which provides more Na+storage ***-situ Fourier transform infrared spectroscopy/electrochemical impedance spectroscopy （FTIR/EIS） and X-ray photoelectron spectroscopy （XPS） analysis demonstrate the presence of more BC3and less B–C–O structures that result in enhanced ion diffusion kinetics and the formation of inorganic rich and robust SEI,which leads to facilitated charge transfer and excellent rate *** a result,the hard carbon anode with optimized boron doping content exhibits enhanced rate and cycling *** general,this work unravels the critical role of boron doping in optimizing the pore structure,interface chemistry and diffusion kinetics of hard carbon,which enables rational design of sodium-ion battery anode with enhanced Na+storage performance.

关键词： X ray photoelectron spectroscopy

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong Sun wenwen Guan Cailing Chen Chao Wu Xiaoling Liu Biao Meng Tao Chen Yu han Jun Wang Shibo Xi Yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Single atom catalyst Synergy effect Carbon catalyst Electrocatalysis

多期动态增强磁共振成像在基于影像组学乳腺癌分子亚型识别中的应用研究

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中华内分泌外科杂志（中英文） 2024年第2期18卷 196-201页

作者：刘效方韩雯雯山东省立医院集团东营医院东营市人民医院乳腺甲状腺外科东营257091 山东省立医院集团东营医院东营市人民医院医学影像科东营257091

目的探索多期动态增强磁共振成像(dynamic contrast-enhanced magnetic resonance imaging,DCE-MRI)图像中影像学特征在识别乳腺癌分子亚型中的应用价值。方法回顾性分析2016年1月至2023年12月间于东营市人民医院接受诊察的172例患者的... 详细信息

目的探索多期动态增强磁共振成像(dynamic contrast-enhanced magnetic resonance imaging,DCE-MRI)图像中影像学特征在识别乳腺癌分子亚型中的应用价值。方法回顾性分析2016年1月至2023年12月间于东营市人民医院接受诊察的172例患者的195例乳腺癌病变的多期DCE-MRI影像资料。样本总体包括21例三阴型、18例人类表皮生长因子受体2(human epidermal growth factor receptor 2,HER2)过表达型、53例Luminal A型、76例Luminal B型HER2阴性和27例Luminal B型HER2阳性。从DCE-MRI的每次扫描及不同后处理得到的图像中,通过手动选取的方式划分感兴趣区域并提取影像学特征。将样本按约8∶2的比例划分为主要样本和测试样本,对主要样本进行10次重复的5倍交叉验证以获得训练集和验证集,分别对基于Logistic回归、分类回归树、支持向量分类、随机森林、梯度提升树等方法构建的预测模型进行训练和验证,之后在测试样本上进行受试者工作特征测试。结果基于Logistic回归的预测模型获得最好的识别性能,其依据各组图像特征进行识别的平均受试者工作特征(receiver operating characteristic curve,ROC)曲线下的面积(area under curve,AUC)为0.781;依据提取自对比后第三次+减影图像的特征识别乳腺癌不同分子亚型的整体AUC为0.809,其中识别Luminal A型、Luminal B型HER2阴性、Luminal B型HER2阳性、HER2过表达型和三阴型的AUC分别为0.784、0.578、0.599、0.812和0.844。使用不同扫描次数和后处理图像的特征,模型的识别效果不同,对比后第三次扫描+减影图像特征和对比后第二次扫描+减影图像特征的识别效果最好,AUC分别为0.762±0.037和0.757±0.046。结论基于多期DCE-MRI图像影像学特征及机器学习方法优化的模型对乳腺癌分子亚型的预测识别具有潜在应用价值。使用注射对比剂后的中期增强(第二次、第三次扫描)图像特征,以应用图像减影处理,有助于达到更好的识别效果。

关键词：乳腺癌分子亚型多期动态增强磁共振成像机器学习支持向量分类

石粉替代率对聚合物机制砂粘结砂浆性能及微细观结构的影响

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材料导报 2024年第6期38卷 132-138页

作者：田浩正乔宏霞冯琼韩文文兰州理工大学土木工程学院兰州730050 兰州理工大学甘肃省先进土木工程材料工程研究中心兰州730050 兰州理工大学西部土木工程防灾减灾教育部工程研究中心兰州730050

为研究凝灰岩石粉在聚合物粘结砂浆中应用的可行性,分析了石粉部分替代水泥对聚合物粘结砂浆工作性能及力学性能的影响规律,并采用压汞法(MIP)、扫描电子显微镜(SEM)和傅里叶变换红外光谱(FTIR)试验研究砂浆内部孔结构及水化产物微观形... 详细信息

为研究凝灰岩石粉在聚合物粘结砂浆中应用的可行性,分析了石粉部分替代水泥对聚合物粘结砂浆工作性能及力学性能的影响规律,并采用压汞法(MIP)、扫描电子显微镜(SEM)和傅里叶变换红外光谱(FTIR)试验研究砂浆内部孔结构及水化产物微观形貌的变化规律。结果表明:凝灰岩石粉在聚合物粘结砂浆中具有较好的适用性;砂浆强度随石粉替代率的增加呈先增大后减小的趋势,在替代率为15%(质量分数,下同)时,砂浆7 d、28 d抗折强度、抗压强度和粘结强度达到最大值,此时工作性能也较优。当石粉替代率不大于15%时,其对粘结砂浆微细观结构的影响以填充效应和晶核效应为主,可有效改善砂浆内部密实度,且有利于内部孔结构向少害孔和无害孔发展;当石粉替代率为15%时,H_(2)O、OH^(-)、CO_(3)^(2-)等特征振动峰强度最高,即此时内部水化最为充分;当石粉替代率超过15%时,石粉对粘结砂浆工作性能、力学性能和微细观结构均产生不利的影响。

关键词：聚合物粘结砂浆凝灰岩石粉力学性能孔结构微观形貌