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Chinese Chemical Letters 2024年第1期35卷 418-423页

作者： Yan Gong Yu Ding Qi Tang Fei Lian Chun Bai Ruiyi xie haijiao xie Xu Zhao School of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300401China Hangzhou Yanqu Information Technology Co. Ltd.Hangzhou 310003China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Collapse

Photocatalytic activation of peroxymonosulfate (PMS) has garnered a lot of interest in the field of wastewater treatment. Herein, a plasmonic Ag nanoparticles decorated MIL-101(Fe) hybrid was synthesized through a photodeposition process. Upon light irradiation, the Ag/MIL-101(Fe) exhibit reinforced photocatalytic activities for elimination of bisphenol A (BPA) with PMS. The optimized 2.0% Ag/MIL-101(Fe) composite presented the highest photocatalytic activity with kinetic constant k of 0.102 min-1, which was about 10-fold of the pristine MIL-101(Fe). Loading of plasmonic Ag into MIL-101(Fe) boosts photoinduced carrier separation and accelerates PMS activation to generate strong oxidative radicals. Photoelectrochemical tests and multiple spectroscopic studies confirmed the promoted charge carrier separation and transfer capability of Ag/MIL-101(Fe). Combining the results of radical trapping experiments and electron spin resonance (ESR), the formed SO4·-, ·OH, ·O2- and 1O2 had a significant role in the photocatalytic process. According to intermediate study, the degradation pathway was studied, and the possible mechanism was proposed.

关键词： Photocatalysis MOF Peroxymonosulfate Plasmonic Ag BPA

Size and near-surface engineering in weak-oxidative confined space to fabricate 4 nm L1_(0)-PtCo@Pt nanoparticles for oxygen reduction reaction

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Nano Research 2023年第5期16卷 6622-6631页

作者： Yifei Liao Lishan Peng Chaoling Wu Yigang Yan haijiao xie Yungui Chen Yao Wang Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610065China Department of Advanced Energy Materials College of Materials Science and EngineeringSichuan UniversityChengdu 610065China Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationChengdu 610065China School of Chemical Sciences The University of AucklandAuckland 1142New Zealand Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China Hangzhou Yanqu Information Technology Co. Ltd.Hangzhou 310003China

The near-surface structure of the Pt-based alloy including the surface and subsurface structures is prominent to their electrocatalytic performance.Modulating the near-surface structure of PtCo intermetallics with small particle size could efficiently optimize the binding force between Pt and oxygen and finally enhance its oxygen reduction reaction(ORR)performance.Here we simultaneously achieve the size controlling and surface modulation of intermetallic nanoparticles(NPs)in a weak-oxidative confined space with abundant uncoordinated oxygen atoms.1–2 atomic layers of concave Pt-rich surface were successfully constructed on 4 nm L1_(0)-PtCo core after removing Co–O species which is derived from the segregation of the subsurface Co to the surface induced by the uncoordinated oxygen atoms.Owing to the elaborate structure,PtCo-1000/C catalyst shows significant improvement in both activity(1.290 A∙mg_(Pt)^(−1)and 1.529 mA∙cm_(Pt)^(−2) at 0.9 V vs.reversible hydrogen electrode(RHE))and stability(85.2%of initial mass activity after accelerated degression tests(ADTs))even the production is scaled up to gram level.Density functional theory calculations suggest that the cave Pt site optimizes the protonation of*O,which finally boosts the ORR performance.

关键词： near-surface engineering core–shell structure intermetallics oxygen reduction reaction

Hyperbranched magnetic polymer:highly efficient removal of Cr(Ⅵ)and application in electroplating wastewater

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Frontiers of Chemical Science and Engineering 2023年第10期17卷 1568-1580页

作者： Nan Sun Qing Wu Lifang Jin Zichen Zhu Jianhui Sun Shuying Dong haijiao xie Chunyan Zhang Yanrui Cui Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control Ministry of Educationand Henan Key Laboratory for Environmental Pollution ControlSchool of EnvironmentHenan Normal UniversityXinxiang 453007China

By using a two-step hydrothermal method and trithiocyanuric acid(TTCA),2,4,6-trihydrazino-1,3,5-triazine(THT),and Fe_(3)O_(4)as raw materials,a spherical magnetic adsorbent polymer(TTCA/THT@Fe_(3)O_(4))was synthesized to achieve the efficient removal of Cr(VI)from wastewater.Under optimal adsorption conditions,the maximum adsorption capacity of TTCA/THT@Fe_(3)O_(4)for Cr(VI)can reach 1340 mg∙g‒1.Notably,the removal efficiency can approach 98.9%,even at the lower concentration of 20 mg∙L^(‒1)Cr(VI).For actual wastewater containing Cr(VI),the Cr(VI)concentration was reduced from 25.8 to 0.4 mg∙L^(‒1),a remarkable 20%lower than the current industry discharge standard value.A mechanism for the high adsorption performance of Cr(VI)on TTCA/THT@Fe_(3)O_(4)was investigated using Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,and density functional theory.It can be plausibly attributed to the formation of Cr/N and Cr/S coordination bonds.Additionally,surface electrostatic adsorption,reduction effects,and the spherical polymer structure increase the contact area with Cr(VI),maximizing adsorption.The synergistic effect of adsorption and reduction enhances the adsorption performance of TTCA/THT@Fe_(3)O_(4)for Cr(VI)and total chromium in water.The resultant polymer has a simple preparation process,excellent adsorption performance,easy magnetic separation,and promising application for actual wastewater.

关键词： magnetic polymer chromium removal hydrogen bonding recyclability actual wastewater

Regulating nitrogen vacancies within graphitic carbon nitride to boost photocatalytic hydrogen peroxide production

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SusMat 2022年第5期2卷 617-629页

作者： Yanlin Zhu Xuetao Liu Heng Liu Guangling He Jiamin Xiao haijiao xie Yanyan Sun Lei Han College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangshaHunanChina School of Materials Science and Engineering Central South UniversityChangshaHunanChina Hangzhou Yanqu Information Technology Co.Ltd. HangzhouChina

Introducing nitrogen vacancies is an effective method to improve the catalytic performance of g-C_(3)N_(4)-based photocatalysts,whereas understanding how nitrogen vacancies types affect the catalytic performance remains unclear.Herein,two different types of nitrogen vacancies were successfully introduced into g-C_(3)N_(4)by pyrolysis of melamine under argon and ammonia atmosphere with subsequent HNO3 oxidation.The pyrolysis atmosphere is found to have a significant influence on the introduced nitrogen vacancies type,where tertiary nitrogen groups(N_(3)C)and sp2-hybridized nitrogen atoms(N_(2)C)were the preferred sites for the formation of nitrogen vacancies under ammonia and argon pyrolysis,respectively.Moreover,nitrogen vacancies from N3C are experimentally and theoretically demonstrated to facilitate the narrowed band gap and the improved oxygen absorption capability.As expected,the optimal catalyst exhibits high H_(2)O_(2)yield of 451.8µM,which is 3.8 times higher than the pristine g-C_(3)N_(4)(119.0µM)after 4 h and good stability after10 photocatalytic runs.

关键词： carbon nitride hydrogen peroxide nitrogen vacancies oxygen absorption

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集成的深度强化学习投资组合模型

计算机应用 2024年第1期44卷 300-310页

作者：龙杰谢良徐海蛟武汉理工大学理学院武汉430070 广东第二师范学院计算机学院广州510303

投资组合问题是量化交易领域中的热点问题。针对现有基于深度强化学习的投资组合模型无法实现自适应的交易策略和有效利用有监督信息的缺陷,提出一种集成的深度强化学习投资组合模型(IDRLPM)。首先,采用多智能体方法构造多个基智能体并... 详细信息

投资组合问题是量化交易领域中的热点问题。针对现有基于深度强化学习的投资组合模型无法实现自适应的交易策略和有效利用有监督信息的缺陷,提出一种集成的深度强化学习投资组合模型(IDRLPM)。首先,采用多智能体方法构造多个基智能体并设计不同交易风格的奖励函数,以表示不同的交易策略;其次,利用集成学习方法对基智能体的策略网络进行特征融合,得到自适应市场环境的集成智能体;然后,在集成智能体中嵌入基于卷积块注意力模块(CBAM)的趋势预测网络,趋势预测网络输出引导集成策略网络自适应选择交易比重;最后,在有监督深度学习和强化学习交替迭代训练下,IDRLPM有效利用训练数据中的监督信息以增强模型盈利能力。在上证50的成分股和中证500的成分股数据集中,IDRLPM的夏普比率(SR)达到了1.87和1.88,累计收益(CR)达到了2.02和1.34;相较于集合式的深度强化学习(EDRL)交易模型,SR提高了105%和55%,CR提高了124%和79%。实验结果表明,IDRLPM能够有效解决投资组合问题。

关键词：深度强化学习投资组合模型集成学习卷积块注意力模块趋势预测

基于动态选择预测器的深度强化学习投资组合模型

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计算机科学 2024年第4期51卷 344-352页

作者：赵淼谢良林文静徐海蛟武汉理工大学理学院武汉430070 广东第二师范学院计算机学院广州510303

近年来,投资组合管理问题在人工智能领域得到了广泛的研究,但现有的基于深度学习的量化交易方法还存在一些问题。首先,对股票的预测模式单一,通常一个模型只能训练出一个交易专家,交易决策也仅根据模型预测结果作出;其次,模型使用的数... 详细信息

近年来,投资组合管理问题在人工智能领域得到了广泛的研究,但现有的基于深度学习的量化交易方法还存在一些问题。首先,对股票的预测模式单一,通常一个模型只能训练出一个交易专家,交易决策也仅根据模型预测结果作出;其次,模型使用的数据源相对单一,只考虑了股票自身数据,忽略了整个市场风险对股票的影响。针对上述问题,提出了基于动态选择预测器的强化学习模型(DSDRL)。该模型分为3部分,首先提取股票数据的特征并传入多个预测器中,针对不同的投资策略训练多个预测模型,用动态选择器得到当前最优预测结果;其次,利用市场环境评价模块对当前市场风险进行量化,得到合适的投资金额比例;最后,在前两个模块的基础上建立了一种深度强化学习模型模拟真实的交易环境,基于预测的结果和投资金额比例得到实际投资组合策略。文中使用中证500和标普500的日k线数据进行测试验证,结果表明,此模型在夏普率等指标上均优于其他参照模型。

关键词：强化学习 LSTM 投资组合股市预测神经网络

S-N型功能分子用作多功能添加剂的缓蚀及摩擦学行为研究

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摩擦学学报（中英文） 2024年第4期44卷 573-584页

作者：俎鹏姣董均阳李毅谢海姣张松伟李军胡丽天中国科学院兰州化学物理研究所固体润滑国家重点实验室甘肃兰州730000 河北工业大学理学院天津300401 青岛市资源化学与新材料研究中心山东青岛266071 杭州研趣信息技术有限公司浙江杭州310003

利用电化学、摩擦学试验和量子化学模拟等手段,研究了巯基甲基噻二唑(MMT)和二壬基萘磺酸(DNS)这2种功能分子作为缓蚀剂的缓蚀性能和作为极压抗磨添加剂的摩擦学性能及其作用机理.电化学试验表明,DNS分子的缓蚀能力较差,缓蚀效率为58.6%... 详细信息

利用电化学、摩擦学试验和量子化学模拟等手段,研究了巯基甲基噻二唑(MMT)和二壬基萘磺酸(DNS)这2种功能分子作为缓蚀剂的缓蚀性能和作为极压抗磨添加剂的摩擦学性能及其作用机理.电化学试验表明,DNS分子的缓蚀能力较差,缓蚀效率为58.6%;MMT分子表现出优异的缓蚀能力,缓蚀效率达93.3%.摩擦学试验表明,DNS作为添加剂时,油样的摩擦系数与PEG基础油的摩擦系数相当,磨损量增大;MMT作为添加剂时,油样的摩擦系数和磨损量较PEG基础油明显降低,极压性能较基础油明显提高.量子化学模拟结果表明,DNS分子与钢表面具有更高的反应活性,因此作为极压抗磨和缓蚀添加剂,加剧了金属的腐蚀和磨损.表面分析结果表明,DNS分子润滑下的磨斑表面主要起到减摩作用的是铁的氧化物和FeSO_(4)等.MMT分子润滑下的磨斑表面的摩擦产物为Fe_(2)(SO_(4))3、FeS_(2)、铁的氧化物以及含氮有机物.

关键词：巯基甲基噻二唑抗腐蚀性能减摩抗磨性能极压性能

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Neutralization of interleukin-11 attenuates silica particles-induced pulmonary inflammation and fibrosis in vivo

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Journal of Environmental Sciences 2023年第4期126卷 772-783页

作者： Jixuan Ma Yujia xie Yiju Xu Pei Gu Yingdie Zhang Lieyang Fan Yun Zhou haijiao Wang Ting Zhou Jintong He Dongming Wang Weihong Chen Department of Occupational&Environmental Health School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Key Laboratory of Environment and Health Ministry of Education&Ministry of Environmental Protectionand State Key Laboratory of Environmental Health(Incubating)School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China State Key Laboratory of Respiratory Disease The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 511436China National Center of Occupational Safety and Health National Health CommissionBeijing 102300China Department of Occupational and Environmental Health School of Public HealthMedical CollegeWuhan University of Science and TechnologyWuhan 430065China Zhuhai Center for Chronic Disease Control Zhuhai 519000China

Environmental exposure to crystalline silica particles can lead to silicosis, which is one of the most serious pulmonary interstitial fibrosis around the world. Unfortunately, the exact mechanism on silicosis is unclear, and the effective treatments are lacking to date. In this study, we aim to explore the molecular mechanism by which interleukin-11(IL-11) affects silica particles-induced lung inflammation and fibrosis. We observed that IL-11 expressions in mouse lungs were significantly increased after silica exposure, and maintained at high levels across both inflammation and fibrosis phase. Immunofluorescent dual staining further revealed that the overexpression of IL-11 mainly located in mouse lung epithelial cells and fibroblasts. Using neutralizing anti-IL-11 antibody could effectively alleviate the overexpression of pro-inflammatory cytokines(i.e., interleukin-6 and tumor necrosis factor-α) and fibrotic proteins(i.e., collagen type I and matrix metalloproteinase-2) induced by silica particles. Most importantly, the expressions of IL-11 receptor subunit α(IL-11Rα), Glycoprotein130(GP130), and phosphorylated extracellular signal-regulated kinase(p-ERK) were significantly increased in response to silica, whereas blocking of IL-11 markedly reduced their levels. All findings suggested that the overexpression of IL-11 was involved in the pathological of silicosis, while neutralizing IL-11 antibody could effectively alleviate the silica-induced lung inflammation and fibrosis by inhibiting the IL-11Rα/GP130/ERK signaling pathway. IL-11 might be a promising therapeutic target for lung inflammation and fibrosis caused by silica particles exposure.

关键词： Silica particles Inflammation Fibrosis Interleukin-11 Silicosis

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小型工业大麻收获机研究进展

农机使用与维修 2024年第6期 89-91页

作者：王红元谢洪昌王晨平石素海王海礁黑龙江省农业机械工程科学研究院绥化分院黑龙江绥化152054

随着大麻产业的发展和合法化,对于高效、可持续的大麻生产技术的需求日益增长。该文综述了近年来小型工业大麻收获机的研究进展,基于大麻收获机的意义和发展背景,着重分析了传统大麻手工收获存在的问题,如劳动密集、效率低下等,概述了... 详细信息

随着大麻产业的发展和合法化,对于高效、可持续的大麻生产技术的需求日益增长。该文综述了近年来小型工业大麻收获机的研究进展,基于大麻收获机的意义和发展背景,着重分析了传统大麻手工收获存在的问题,如劳动密集、效率低下等,概述了小型工业大麻收获机的设计原理和技术特点,随后对目前小型工业大麻收获机应用特点即存在的问题进行分析,包括其优缺点和适用场景。最后展望小型工业大麻收获机的未来发展趋势,提出了需要进一步解决的技术难题和发展方向,以期为大麻生产技术的进步提供参考和借鉴。

关键词：小型工业大麻收获机大麻生产技术自动化效率机械结构技术创新

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Ternary phase diagrams and solvate transformation thermodynamics of omeprazole sodium in different solvent mixtures

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Chinese Journal of Chemical Engineering 2019年第2期27卷 362-368页

作者： Meitang Jin Zhao Xu Ying Bao Long Li Liping Wang haijiao Lu Chuang xie Hongxun Hao School of Chemical Engineering and Technology Tianjin University Collaborative Innovation Centre of Chemical Science and Engineering

Omeprazole sodium(OMS), a typical non-hydrogen bond donors API, is only available in solvates so far, including monohydrate, ethanol solvate and methanol solvate. The methanol solvate was found for the first time. Solvate transformation thermodynamics of OMS was studied in this paper. First, the ternary phase diagrams forming two solvates for OMS in binary solvent mixtures including methanol + water, ethanol + water, and methanol+ ethanol were measured at temperature ranging of T =(278.15 to 313.15) K under atmospheric pressure. Further, the standard equilibrium constants of the solvate transformation reactions were evaluated according to the chemical reaction isothermal equation. The standard molar Gibbs free energy, the standard molar enthalpy, and the standard molar entropy of solvate transformation reactions were then calculated based on van't Hoff equation. Moreover, the thermodynamic stability of the OMS solvate was analyzed based on phase diagram. The results are of great importance to develop a crystallization process for manufacturing OMS solvate, and could be helpful to other solvate transformation research.

关键词： Omeprazole sodium Solvate Phase equilibria Ternary phase diagram Chemical reaction Thermodynamics