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MoS_(2)负载型陶粒催化剂非均相Fenton处理造纸废水

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陕西科技大学学报 2024年第4期42卷 33-40页

作者：刘雨恺罗清薛伟段超张梓悦郭鑫白雨柔潘静欢陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心陕西西安710021 中国海诚工程科技股份有限公司上海200031

通过分散-浸渍-烧结工艺制备MoS_(2)负载型陶粒催化剂.采用XRD、SEM、EDS对催化剂的物相结构、微观形貌、元素分布进行表征分析.结果表明,MoS_(2)均匀负载到铁泥基陶粒催化剂表面,催化剂粗糙的表面结构将会在反应中暴露更多的活性位点.... 详细信息

通过分散-浸渍-烧结工艺制备MoS_(2)负载型陶粒催化剂.采用XRD、SEM、EDS对催化剂的物相结构、微观形貌、元素分布进行表征分析.结果表明,MoS_(2)均匀负载到铁泥基陶粒催化剂表面,催化剂粗糙的表面结构将会在反应中暴露更多的活性位点.以CODCr去除率为评判指标,探究pH、m(CODCr)∶m(H_(2)O_(2))、催化剂用量、反应时间对MoS_(2)负载型陶粒催化剂非均相Fenton处理造纸废水的影响.结果表明,最佳工艺条件为:pH为2.5、催化剂投加量30 g/L、m(CODCr)∶m(H_(2)O_(2))=1∶1.5、反应时间120 min,造纸废水CODCr去除率为72.52%.并通过自由基猝灭实验得出在非均相Fenton氧化体系中,降解有机污染物的活性物质主要是·OH、^(1)O_(2)、·O_(2)^(-).

关键词：催化剂造纸废水非均相Fenton 活性基团

NdF_(3)-LiF-Nd_(2)O_(3)-NdF_(2)熔盐体系结晶行为的研究

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稀有金属与硬质合金 2024年第2期52卷 1-5页

作者：姜银举段超邓永春辛文彬唐家悦樊文军内蒙古科技大学材料与冶金学院内蒙古包头014010 内蒙古科技大学轻稀土清洁提取与应用内蒙古自治区工程研究中心内蒙古包头014010

氟化物体系稀土氧化物熔盐电解过程中,熔盐的结晶析出行为显著影响电解过程,为此本文针对NdF_(3)-LiF-Nd_(2)O_(3)、NdF_(3)-LiF-NdF_(2)以及NdF_(3)-LiF-Nd_(2)O_(3)-NdF_(2)三种熔盐体系(NdF_(3)和LiF质量比固定为85∶15),采用降温黏度曲线测定熔盐的结晶温度,通过X射线衍射分析结晶物相。结果表明:NdF_(3)-LiF-Nd_(2)O_(3)和NdF_(3)-LiF-NdF_(2)熔盐体系中,随着熔盐中Nd_(2)O_(3)或NdF_(2)含量的增加,熔盐的结晶温度升高,熔盐的结晶物相分别为NdOF和NdF_(2);NdF_(3)-LiF-Nd_(2)O_(3)-NdF_(2)熔盐体系中,当Nd_(2)O_(3)含量为2%~3%、NdF_(2)含量为1%~3%时,熔盐结晶温度在981~988℃范围内,且NdOF与NdF_(2)共结晶。适当提高电解槽底部温度、改善底部熔盐的流动性,是抑制稀土熔盐电解过程熔盐结晶析出的有效方法。

关键词：熔盐电解 NdF_(3)-LiF-Nd_(2)O_(3)-NdF_(2) 黏度结晶温度结晶物相

新课标理念下高中化学探究式实验教学研究——以“原电池的工作原理”为例

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云南化工 2024年第4期51卷 183-185页

作者：段超迟捷付甜尚永辉王宏社宝鸡文理学院化学化工学院陕西宝鸡721013 咸阳师范学院化学与化工学院陕西咸阳712000

探究式实验教学是高中化学实验的一种重要教学方式,研究新课标理念下实验探究活动对中学化学实验教学具有重要的意义。在新课标要求的大背景下,基于建构主义学习理论、布鲁纳认知-发现理论的指导作用,对人教版(2019版)“原电池的工作原... 详细信息

探究式实验教学是高中化学实验的一种重要教学方式,研究新课标理念下实验探究活动对中学化学实验教学具有重要的意义。在新课标要求的大背景下,基于建构主义学习理论、布鲁纳认知-发现理论的指导作用,对人教版(2019版)“原电池的工作原理”进行了探究式实验教学研究,以期对中学化学实验教学提供一些建议。

关键词：新课标高中化学探究式实验教学

Evaluating oxygen level of Si-deoxidized H13 die steel using ferrous oxide-containing slags at 1873 K

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Journal of Iron and Steel Research International 2021年第8期28卷 978-989页

作者： Shao-ying Li Bin Li Xing-ming Zhao Xiao-jun Xi Sheng-chao duan Jing Guo Han-jie Guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials Beijing 100083China Shandong Tianwu Forming Technology Co. Ltd.Liaocheng 252024ShandongChina

Laboratory-scale experiments were conducted to investigate the oxygen content of Si-deoxidized H13 die steel by ferrous oxide-containing slags at 1873 *** calculation of thermodynamics and kinetics was performed to evaluate the oxygen level of molten steel through[Si]-[O]equilibrium and[Fe]-[O]*** results show that as the FeO content in slag increases,the oxygen content with[Si]-[O]equilibrium(w([O])Si)has almost no *** both the oxygen content with[Fe]-[O]equilibrium(w([O])Fe)and w([O])Si are less than the initial oxygen content in steel(w(TO)i),the oxygen content in steel(w([O]))depends on the higher value between w([O])Si and w([O])*** the case of w([O])Fe>w(TO)i,the value of w([O])is the difference between the sum of w(TO)i and w([O])Si and the value of w([O])*** reaction rates of[Si]-[O]and[Fe]-[O]are equal,which are controlled by the mass transfer of oxygen in molten *** evaluation method is suitable to the whole smelting process of Si-deoxidized H13 die steel.

关键词： Ferrous oxide-containing slag Oxygen level Thermodynamic calculation Si-deoxidized H13 die steel Kinetic model Si-Oequilibrium Fe-Oequilibrium

“宏-微-符”三重表征法在中学化学实验教学中的应用--以“Fe^(2+)与Fe^(3+)的检验”为例

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云南化工 2024年第2期51卷 182-184页

作者：迟捷段超付甜尚永辉王宏社宝鸡文理学院化学化工学院陕西宝鸡721013 咸阳师范学院化学与化工学院陕西咸阳712000

以中学化学课堂实验教学“Fe^(2+)与Fe^(3+)的检验”为例,引导学生先从宏观上观察实验现象,再从微观角度解释实验现象,最后从化学特有的语言—书写“离子反应方程式”进行符号表征。这种“宏-微-符”三重表征法有利于学生学习化学知识... 详细信息

以中学化学课堂实验教学“Fe^(2+)与Fe^(3+)的检验”为例,引导学生先从宏观上观察实验现象,再从微观角度解释实验现象,最后从化学特有的语言—书写“离子反应方程式”进行符号表征。这种“宏-微-符”三重表征法有利于学生学习化学知识和构建三者内在的联系,并培养形成学生化学实验探究学习的特定思维模型。

关键词：宏观微观符号三重表征化学实验

Key Optimization Issues for Renewable Energy Systems under Carbon-Peaking and Carbon Neutrality Targets:Current States and Perspectives

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Energy Engineering 2022年第5期119卷 1789-1795页

作者： Bo Yang Zhengxun Guo JingboWang chao duan Yaxing Ren Yixuan Chen Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunmingChina Department of Physics and Astronomy Northwestern UniversityIllinoisUSA Warwick Manufacturing Group The University ofWarwickCoventryUK The University of Hong Kong Hong KongChina

1 Introduction The United States,Japan,Canada,the European Union,and other developed countries and regions have all formulated climate strategies and pledged to achieve net-zero CO_(2) emissions by ***,meanwhile,has announced through the“carbon-peaking and carbon neutrality targets”in September 2020 that it aims to achieve“peak carbon use”by 2030 and“carbon neutrality”by 2060[1].According to statistical data from the International Energy Agency(IEA),Fig.1 illustrates the carbon intensity of electricity generation in various regions in the Announced Pledge Scenario(APS)from 2010 to 2040[2].One can easily observe that each region aims to accomplish a sharp decrease in the carbon intensity of electricity generation after 2020.

关键词： Carbon-peaking and carbon neutrality targets renewable energy optimization modeling power forecast planning and dispatching reliability and security analysis

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新型农抗N2对采后柑橘的保鲜效果研究

生物灾害科学 2024年第3期47卷 415-422页

作者：段超刘群王倩代于琪郝利文彭帅英南昌大学食品科学与资源挖掘全国重点实验室江西南昌330047 江西农业大学生物科学与工程学院/应用微生物研究所江西南昌330045

【目的】研究新型抗真菌剂-农抗N2对柑橘采后保鲜效果的影响,以期为柑橘采后的防腐保鲜技术提供材料与理论参考。【方法】使用5.77 mg/L农抗N2对采摘后柑橘进行浸泡处理,晾干后使用聚乙烯薄膜进行单果包装,于25℃、相对湿度90%~95%条件... 详细信息

【目的】研究新型抗真菌剂-农抗N2对柑橘采后保鲜效果的影响,以期为柑橘采后的防腐保鲜技术提供材料与理论参考。【方法】使用5.77 mg/L农抗N2对采摘后柑橘进行浸泡处理,晾干后使用聚乙烯薄膜进行单果包装,于25℃、相对湿度90%~95%条件下储存60 d,以无菌水浸泡的柑橘为阴性对照,以200 mg/L抑霉唑浸泡处理的柑橘为阳性对照,测定柑橘的腐烂率及失重率,可溶性固形物、可滴定酸、抗坏血酸以及酚类与黄酮类化合物含量,研究农抗N2对柑橘采后的保鲜效果。【结果】农抗N2处理后的柑橘,其失重率与腐烂率显著低于无菌水处理组(CK组),且与抑霉唑处理组无显著性差异;农抗N2处理后的柑橘,其果实可溶性固形物含量在贮存40 d后显著高于CK组;果实可滴定酸与抗坏血酸含量在60 d的贮存期内与CK组无显著性差异;柑橘果皮总酚与黄酮含量在储存50 d后显著高于阴性对照组。【结论】农抗N2能显著降低采后柑橘的失重率以及腐烂率,有效延长采后柑橘的货架期。此外,农抗N2在60 d的贮存期内能显著提高柑橘果实的可溶性固形物含量以及柑橘果皮的酚类与黄酮类化合物含量,有效维持柑橘果实的品质与营养价值。

关键词：新型抗真菌剂失重率采后腐烂可溶性固形物含量酚类与黄酮类化合物

Flexible,anti-damage,and non-contact sensing electronic skin implanted with MWCNT to block public pathogens contact infection

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Nano Research 2022年第3期15卷 2616-2625页

作者： duan-chao Wang Hou-Yong Yu Lurong Jiang Dongming Qi Xinxing Zhang Lumin Chen Wentao Lv Weiqiang Xu Kam Chiu Tam National Engineering Lab for Textile Fiber Materials&Processing Technology College of Textile Science and EngineeringZhejiang Sci-Tech UniversityHangzhou 310018China College of Information Science and Technology Zhejiang Sci-Tech UniversityHangzhou 310018China State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065China Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of Waterloo200 University Avenue WestWaterlooOntario N2L 3G1Canada

If a person comes into contact with pathogens on public facilities,there is a threat of contact(skin/wound)*** urgently,there are also reports about COVID-19 coronavirus contact infection,which once again reminds that contact infection is a very easily overlooked disease exposure ***,we propose an innovative implantation strategy to fabricate a multi-walled carbon nanotube/polyvinyl alcohol(MWCNT/PVA,MCP)interpenetrating interface to achieve flexibility,anti-damage,and non-contact sensing electronic skin(E-skin).Interestingly,the MCP E-skin had a fascinating non-contact sensing function,which can respond to the finger approaching 0−20 mm through the spatial weak *** non-contact sensing can be applied urgently to human–machine interactions in public facilities to block *** scratches of the fruit knife did not damage the MCP E-skin,and can resist chemical corrosion after hydrophobic *** addition,the MCP E-skin was developed to real-time monitor the respiratory and cough for exercise detection and disease ***,the MCP E-skin has great potential for emergency applications in times of infectious disease pandemics.

关键词： prevent contact infection anti-damage sensors non-contact sensing respiratory sensing human–machine interaction

Synergistic effects and kinetics analysis for co-pyrolysis of vacuum residue and plastics

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Frontiers of Chemical Science and Engineering 2024年第5期18卷 71-81页

作者： chao Wang Xiaogang Shi Aijun duan Xingying Lan Jinsen Gao Qingang Xiong State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510640China

This study utilizedathermogravimetric analyzer to assess the thermal decomposition behaviors and kinetics properties of vacuum residue(VR)and low-density polyethylene(LDPE)*** kinetic parameters were calculated using the Friedman *** demonstrate the interactive effects between LDPE and VR during the co-pyrolysis process,the disparity in mass loss and mass loss rate between the experimental and calculated values was *** co-pyrolysis curves obtained through estimation and experimentation exhibited significantdeviations,whichwerei influencedby temperature and mixing ratio.A negative synergistic interaction was observed between LDPE and VR,although this inhibitory effect could be mitigated or eliminated by reducing the LDPE ratio in the mixture and increasing the ***-pyrolysisprocess resulted in a reduction in carbon residue,which could be attributed to the interaction between LDPE and the heavy fractions,particularly resin and asphaltene,present in *** findings align with the pyrolysis behaviors exhibited by the four VR ***,it was observed that the co-pyrolysis process exhibited lower activation energy as the VR ratio increased,indicating a continuous enhancement in the reactivity of the mixed samples during co-pyrolysis.

关键词： co-pyrolysis heavy residual oil polyethylene thermogravimetric analysis synergistic effects