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Effectively improving the extreme-pressure capacity of a class of intercalated zirconium phosphate materials

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Science China(Technological Sciences) 2024年第3期67卷 753-764页

作者： NIU WenXing ZHAO XinRui YUAN Min HOU ZhiGuo LIU Lei XU Hong dong jinxiang Shanxi Key Laboratory of Chemical Product Engineering Cllege of Chemical Engineering and TechnologyTaiyuan University of TechnologyTaiyuan 030024China School of Chemical and Environmental Engineering Pingdingshan UniversityPingdingshan 467000China

We studied different long-chain ammonium ions intercalated zirconium phosphate α-ZrP, methylamine intercalated ZrP(MAZrP), tetramethylammonium hydroxide intercalated ZrP(TMAH-ZrP), dodecyltrimethylammonium bromide intercalated ZrP(DTAB-ZrP), and stearyl trimethyl ammonium bromide intercalated ZrP(STAB-ZrP) as grease co-additives in combination with isobutylene sulfide(SIB). The grease with co-additives displayed excellent extreme-pressure and anti-wear ***, the combination of the longest chain ammonium ion intercalated zirconium phosphate, STAB-ZrP/SIB, had the best tribological properties. In comparison to α-ZrP, the advantage of STAB-ZrP was that it did not form a large area of the dense physical film like α-ZrP on the worn surface, but rather gave the SIB a chance to contact with the fresh metal surface to generate a chemical film. Therefore, the sub-micron physical film and nanoscale chemical film always exist side by side on the contact surface during the friction process. This intercalated α-ZrP/SIB additive has great potential for use in harsh operating conditions.

关键词： intercalatedα-ZrP/SIB physical film chemical film tribological properties

Direct synthesis of a disinfectant with fresh scent of green plants by semi-hydrogenation of alkynol on Pd single-atom catalysts

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Nano Research 2024年第5期17卷 3872-3878页

作者： Yan Jiang Xuetong Yu Yuxia Ji Xunzhu Jiang Yalin Guo Tianbo Li Liang Gao Rui Lang Yanxiong Fang Botao Qiao jinxiang dong School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116024China Guangdong Provincial Key Laboratory of Plant Resources Biorefinery Guangzhou 510006China School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou 221116China

Alcohol-based disinfectants have protected people in the coronavirus disease 2019(COVID-19)pandemic,but olfactory stimuli of ethanol may evoke unpleasant memories associated with stressful situations in the devastating infectious *** smell of ethanol in household cleaning and disinfectant products can be covered up by the fragrance additives,and 3-hexenol is especially appreciated for the characteristic,strong odor of green *** production of 3-hexenol relies on the selective hydrogenation of 3-hexyn-1-ol,where Lindlar catalyst is normally used for the superior *** achieving such catalytic transformation in ethanol solution seems as a direct way to produce a disinfectant with green aroma,a popular consumer product in the post-COVID era,severe leaching of toxic Pb hinders Lindlar catalyst as a promising *** find that the Fe_(2)O_(3) supported Pd single-atom catalyst is highly selective to fulfill semi-hydrogenation of 3-hexyn-1-ol in 75%ethanol,and the aforementioned household product is readily generated after filtrating the stable,solid catalyst out of reaction ***-atom catalysts have been frequently utilized for fine-chemical synthesis,while in this work they make stunning debut in practical manufacture of daily used products.

关键词： single-atom catalysis hydrogenation fragrance household product coronavirus disease 2019(COVID-19)

一种使用深度联合学习的ICS自适应异常检测方法

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传感技术学报 2024年第2期37卷 241-255页

作者：陈凤华董金祥浙江广厦建设职业技术大学智能制造学院浙江东阳322100 浙江大学计算机学院浙江杭州310058

为了提高工业控制系统异常检测方法的准确性、及时性以及可部署性,提出了一种使用深度联合学习的ICS自适应异常检测方法。具体来说,首先提出了一种轻量级局部学习模型,以提高学习速度,合理利用硬件资源,保证了部署在分布式边缘设备中的... 详细信息

为了提高工业控制系统异常检测方法的准确性、及时性以及可部署性,提出了一种使用深度联合学习的ICS自适应异常检测方法。具体来说,首先提出了一种轻量级局部学习模型,以提高学习速度,合理利用硬件资源,保证了部署在分布式边缘设备中的可行性。其次提出了一种只基于正常数据的无监督学习模型,并结合核分位数估计对检测机制进行自适应动态调整。最后将上述方法整合到联合学习框架下,使其能有效地在边缘段攻击源附近进行分布式异常检测,以最大化减少系统对异常攻击的响应时间。

关键词：分布式控制系统深度学习联合学习边缘计算

Ethylene glycol purification by melt crystallization:Removal of 2-methoxyethanol impurity

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Chinese Journal of Chemical Engineering 2021年第9期34卷 39-45页

作者： Tiefeng Wang jinxiang dong College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China

The coal(syngas)-to-ethylene glycol(CTEG),is contaminated with the naughty impurity 2-Methoxyethanol(ME)generated during the hydrogenation stage,which affect the quality of EG for fiber-grade polyester ***,is the employed separation process in industrial,which makes production complicated because of the heat sensitivity of the impurities *** crystallization has been regarded as an effective technology to obtain high-purity organic compounds based on the melting points difference,which could avoid the problems by *** this work,we have explored the feasibility of the static melt crystallization on the separation of EG/ME in a jacketed crystallization *** experimental parameters were investigated,which covers crystallization and sweating stage in each *** results showed that the purity of EG could reach≥99.8%from the binary system studied via the quaternary separation process.

关键词： Separation Crystallization Purification Ethylene glycol 2-Methoxyethanol

含铁锰的有机凝胶原位还原和碳化及其费托合成反应性能

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燃料化学学报（中英文） 2024年第9期52卷 1256-1265页

作者：李长霄李杰路七超刘建超刘雷董晋湘太原理工大学化学工程与技术学院化学产品工程山西省重点实验室山西太原030024

本研究制备了系列含Fe、Mn的有机凝胶前驱体,在氩气氛围下通过高温热处理,凝胶中铁物种被有机物原位分解进行还原和碳化,制备出了θ-Fe_(3)C含量不同的费托合成催化剂。采用XRD、N_(2)吸附-脱附、Raman、CO-TPD、CO_(2)-TPD、XPS和TEM... 详细信息

本研究制备了系列含Fe、Mn的有机凝胶前驱体,在氩气氛围下通过高温热处理,凝胶中铁物种被有机物原位分解进行还原和碳化,制备出了θ-Fe_(3)C含量不同的费托合成催化剂。采用XRD、N_(2)吸附-脱附、Raman、CO-TPD、CO_(2)-TPD、XPS和TEM等手段对催化剂的结构组成、表面性质以及活性物种的电子价态进行了系统的表征和分析。实验结果表明,热处理后获得的催化剂含石墨碳、θ-Fe_(3)C、Fe^(0)和(FeO)_(0.497)(MnO)_(0.503)物相,费托反应后催化剂的结构保持稳定,物相种类不发生变化。考察了反应条件对催化性能的影响,FeMn10催化剂具有较优的催化性能,CO转化率为57.3%,低碳烯烃(C_(2)-C_(4))选择性为37.1%,其中,θ-Fe_(3)C物相作为催化活性位点,催化剂的活性和低碳烯烃的选择性与θ-Fe_(3)C的含量具有正相关性。

关键词：费托合成低碳烯烃 θ-Fe_(3)C Mn

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Ionothermal Synthesis and Structural Characterization of a Novel Open Framework Zinc Diphosphonate with Carboxylate-like Linker

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Chinese Journal of Chemistry 2017年第9期35卷 1411-1416页

作者： Li Zhang Lei Liu jinxiang dong College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan Shanxi 030024 China

A novel crystalline zinc diphosphonate, （CH3NH3）4Zn2（xbp）2·H2O, denoted as compound 1, was ionothermally synthesized from tetraethyl-p-xylylenebisphosphonate （Yexbp） and Zn（OAc）2 in a protic eutectic mixture with urea/methylamine hydrochloride. Its structure was determined by single-crystal X-ray diffraction data and had a special three-dimensional open framework with rhombic channels. Compound 1 belongs to the monoclinic system （space group C2/c）, with lattice parameters a=22.6876（19）A, b=8.7376（7）A, c=8.1673（9）A, β= 108.146（2）°, V= 1538.5（2） A^3, Z=2. Its structure is totally different from the typical organic pillared structure, only two oxygens of the phosphonate group are coordinated with zinc atoms, and the third oxygen exists in the terminal form, which is similar to the popular dicarboxylate linkers in MOFs. The organic cations [CH3NH3]^＋ of the eutectic mixture played a structure-directing role for constructing this framework and were confined in the pore channels to balance the negative charges resulting from the zinc phosphonate inorganic chains.

关键词： p-xylylenebisphosphonate ionothermal synthesis deep eutectic mixture coordination polymer crystal structure

Solution-Mediated Transformation of a 1D [Zn（Im）（HIm）2（OAc）] Precursor to Several Different 3D Zn（Im）2 Frameworks

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Chinese Journal of Chemistry 2017年第7期35卷 1086-1090页

作者： Youjun Guan Qi Shi jinxiang dong College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan Shanxi 030024 China

1D compound [Zn（Im）（HIm）2（OAc）] was used as a single precursor of metal and imidazole to prepare several 3-dimensional （3D） Zn（Im）2 frameworks by solution-mediated transformation. Specifically, three known topologies, zni, coi and crb （BCT） were obtained using a solution-mediated transformation with CH3OH, DMF and DMA as solvent, respectively. Structural studies by 13C MAS NMR spectroscopy and TG imply that in the transformation process from 1D compound to coi-[Zn（Im）2]·（DMF）x and crb-[Zn（Im）2]·（DMA）x （ZIF-1）, DMF and DMA solvent molecules acted as structure-directing agent and, therefore, were occluded inside the framework, respectively. In contrast, in the formation of zni-[Zn（Im）2], no solvent molecules were present in the frameworks; therefore the transformation from 1 D compound to zni was induced by temperature. Thus, solution-mediated transformation of a single precursor （1 D compound） approach was established for the synthesis of ZIFs.

关键词： zinc metal-organic framework phase transitions

Boosted cascade of scattered rectangle features for object detection

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Science in China(Series F) 2009年第2期52卷 236-243页

作者： ZHANG WeiZe TONG RuoFeng dong jinxiang Institute of Artificial Intelligence Zhejiang University Hangzhou 310027 China

This paper presents a variant of Haar-Iike feature used in Viola and Jones detection framework, called scattered rectangle feature, based on the common-component analysis of local region feature. Three common components, feature filter, feature structure and feature form, are extracted without concerning the details of the studied region features, which cast a new light on region feature design for specific applications and requirements： modifying some component（s） of a feature for an improved one or combining different components of existing features for a new favorable one. Scattered rectangle feature follows the former way, extending the feature structure component of Haar-like feature out of the restriction of the geometry adjacency rule, which results in a richer representation that explores much more orientations other than horizontal, vertical and diagonal, as well as misaligned, detached and non-rectangle shape information that is unreachable to Haar-Iike feature. The training result of the two face detectors in the experiments illustrates the benefits of scattered rectangle feature empirically; the comparison of the ROC curves under a rigid and objective detection criterion on MIT＋CMU upright face test set shows that the cascade based on scattered rectangle features outperforms that based on Haar-Iike features.

关键词： Haar-like feature feature filter feature structure feature form cascade

Co-templating Ionothermal Synthesis and Crystal Structure of a New Layered Aluminophosphate from a Protic Deep Eutectic Solvent

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Chinese Journal of Chemistry 2016年第4期34卷 419-424页

作者： Yuan Li Xiangdong Gong Lei Liu jinxiang dong Research Institute of Special Chemicals Taiyuan University of Technology Taiyuan Shanxi 030024 China

Protic deep eutectic mixtures are usually composed of organic amine hydrochloride salts and hydrogen bond donors in a specific molar ratio. Ionothermal synthesis of aluminophosphate as an example, herein, was reported for the first time from an urea-based protic eutectic mixture, consisting of diethylammonium chloride （DEACI） and 1,3-dimethyl urea （DMU）. As a result, a new two dimensional aluminophosphate with 4.8-network, [CH3NH3]2[（C2H5）2NH2]Al3（PO4）4, has been successfully synthesized by co-templating the DEA and methylamine in situ generated from the decomposition of DMU in the absence of HF. Compared to alkyl quaternary ammonium salts with more alkyl-group connected with N atom, this kind of organic amine salts are more likely as the struc- ture-directing agents to synthesize aluminophosphates in urea-based deep eutectic mixtures. It was also found that HF is crucial to the phase selectivity, a known compound with chain-like structure was obtained with the single methylamine as a structure-directing agent in the presence of HF. These materials were characterized by powder XRD, SEM, TG-DSC, 13C CP-MAS NMR and CHN analyses.

关键词： structure-directing agent ionothermal synthesis deep eutectic solvent crystal structure