Fengdong Wang

Nankai University

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Chenxi Zhang

National University of Defense Technology

Qing‐Lun Wang

Nankai University

Wenhui Su

International Bamboo and Rattan Organization

Zhenjie Zhang

Nankai University

Yi Rong

Mayo Clinic in Arizona

Xingyuan Long

Xi'an Jiaotong University

Xing Yuanyuan

Hebei General Hospital

Yi-Cheng Fan

Sichuan University

Peng Cheng

Nankai University

Yuqing Duan

Capital Medical University

Cooperative Institutions

Nankai University

Chinese Academy of Sciences

Tianjin University of Science and Technology

Xi'an Jiaotong University

Zhejiang University

Collaborative Innovation Center of Chemical Science and Engineering Tianjin

University of Chinese Academy of Sciences

First Automotive Works (China)

Qingdao University

China University of Mining and Technology

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Pd(0)/Xantphos-Catalyzed Benzylic C(sp³)–O Arylation of Benzyl Heteroaryl Ethers: Reduction of Pd(II) to Pd(0) by Xantphos

The Journal of Organic Chemistry (2024)

Qingxue Ma Fengdong Wang Pengfei Zhang Guoshuai Li Yang Li

Herein, we report the synthesis of 1,1-diarylmethanes via palladium-catalyzed benzylic C(sp

Xantphos

10.1021/acs.joc.4c00966

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The study on rapid identification of the key error sources of multi axis motion system based on quasi-rigid body error model

International Journal of Nanomanufacturing (2016)

Yangpeng Liu Jianjun Ding Fengdong Wang Xingyuan Long Zhuangde Jiang

In order to realise precision measurement of complex freeform surfaces, static and dynamic errors of the measurement instruments must be strictly controlled. During instrument assembly, it is very difficult to separate the main influence factors from the other various errors. This paper establishes a quasi-rigid body error model for a multi axis motion system composed of three linear axes and a rotating shaft, and presents a method of the reasonable simplification error model based on the measurement path to identify quickly the key error sources. Based on the example of standard gear measurement, the feasibility of this method is validated.

Solid body

Identification

10.1504/ijnm.2016.077064

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Linkage-Affected Donor–Acceptor Covalent Organic Frameworks for Photocatalytic Hydrogen Production

Processes (2023)

Fengdong Wang Wei Liu Jiao Wang Chenxi Zhang

The depletion of traditional fossil energy and the resulting environmental pollution forces people to explore new energy sources. Direct use of solar energy is now a viable solution for solving these problems. Covalent organic frameworks (COFs) are a porous crystalline material; their well-defined two-dimensional or three-dimensional frameworks can ensure the orderly arrangement of photoelectric active units, giving them potential photoelectric conversion applications. The tunable structural features endow COFs many advantages in photocatalytic hydrogen production under visible light. This review comprehensively summarizes the research progress on photoelectronic donor–acceptor (D-A) COFs with tunable structure for photocatalytic hydrogen evolution and will provide a feasible guiding strategy for applying this type of COFs in photocatalytic hydrogen production.

Photoelectric effect

Solar energy conversion

Acceptor

10.3390/pr11020347

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Citations (7)

High performance proton exchange membranes with double proton conduction pathways by introducing MOF impregnated with protic ionic liquid into SPEEK

Microporous and Mesoporous Materials (2022)

Xinxin Wang Yi Rong Fengdong Wang Chenxi Zhang Qing‐Lun Wang

Proton Transport

Chemical Stability

10.1016/j.micromeso.2022.112314

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Citations (24)

Intelligent recognition of cutting load of coal mining equipment based on vibration wavelet packet feature

Jianjian Yang Wang Zi-rui Tang Zhi-wei Fengdong Wang Zhihua Zhang

In order to solve the problem of indirect identification of cutting load, a method of feature extraction based on vibration signal analysis and processing is presented. This method takes the shearer rocker arm level vibration signal as the object, using the empirical formula to improve the vibration signal is decomposed into several effective time-frequency features, improved the classical wavelet packet method of aliasing and endpoint effect phenomenon, selects the energy characteristics of each order value, explore the relationship between the characteristic value and the coal mining machine payload the. The results show that the analysis of the signal acquisition system of a coal mining machine structure does not change the method, not affect the normal operation of coal mining machine, easy to implement long-term online monitoring, for a large number of basic data collection, in order to improve the quantitative load cutting hardness recognition accumulated data.

SIGNAL (programming language)

Payload (computing)

Feature (linguistics)

Aliasing

10.1109/icmic.2017.8321539

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High Proton Conductivity of a Cadmium Metal–Organic Framework Constructed from Pyrazolecarboxylate and Its Hybrid Membrane

Inorganic Chemistry (2021)

Fengdong Wang Wenhui Su Chenxi Zhang Qing‐Lun Wang

A new type of metal-organic framework, [Cd2(pdc)(H2O)(DMA)2]n (pdc = 3,5-pyrazoledicarboxylic acid; DMA = dimethylamine), named Cd-MOF, was synthesized and characterized. There are regular rectangular pore channels containing a large number of dimethylamine cations in the crystal structure. AC impedance test results show the proton conductivity of Cd-MOF reaches 1.15 × 10-3 S cm-1 at 363 K and 98% RH. In order for its application in fuel cells, the Cd-MOF was introduced into a sulfonated polyphenylene oxide matrix to prepare a hybrid membrane, and the proton conductivity of the hybrid membrane has a high value of 2.64 × 10-1 S cm-1 at 343 K and 98% RH, which is higher than those of most MOF polymer hybrid membranes. The proton conductivity of the hybrid membrane of the SPPO polymer still maintains a certain degree of stability in a wide temperature range. To the best of our knowledge, it is the first proton exchange membrane that combines pyrazolecarboxylate cadmium MOFs and an SPPO polymer with high proton conductivity and good stability. This research may help to further develop the application of MOFs in the field of proton exchange membrane fuel cells.

10.1021/acs.inorgchem.1c02165

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Citations (17)

Research and Application on Dynamic Stiffness of Leaf Spring

Lecture notes in electrical engineering (2012)

Zhanfu Zhou Wanfu Guo Tiejun Shen Fengdong Wang Jianhui Ju

Leaf spring

10.1007/978-3-642-33795-6_10

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Integrating CdS and Titanium Oxide Clusters with Molecular Redox Catalysts into Metal‐Organic Frameworks Promoting Photocatalytic Efficient H₂ Evolution

ChemCatChem (2022)

Wenhui Su Fengdong Wang Yi Rong Mengyao Xu Chenxi Zhang

Abstract A new quaternary crystalline catalyst was obtained by a mixed hydrothermal method of integrating inorganic semiconductors, titanium oxide cluster (TOC) and molecular redox centers orderly into metal organic framework (MOF) materials. It shows a hydrogen production rate 3711.53 μmol g −1 h −1 under visible light irradiation, exceeds most of the same type of catalyst reported in recent years, and a favorable stability with. The excellent performance of the CdS/TOC/UiO‐67‐bpy/Co composites due to efficient promotion of photo‐induced carrier separation and migration, and offering abundant active sites for generating hydrogen. This work will help to guide the preparation of new efficient and stable photocatalysts and promote the effective conversion of solar energy to chemical energy.

Titanium oxide

10.1002/cctc.202200107

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Frontispiece: Designable Guest‐Molecule Encapsulation in Metal–Organic Frameworks for Proton Conductivity

Chemistry - A European Journal (2022)

Fengdong Wang Bincheng Wang Biaobiao Hao Chenxi Zhang Qing‐Lun Wang

By encapsulating various designable molecules in metal organic frameworks (MOFs), the proton conductivity of composites can be improved. Here we classify these designable molecules into four types, and discuss the effect of their introduction on the improvement of the proton conductivity of MOFs. We hope to provide some feasible guidance for the design and development of future composite proton-conducting materials for MOFs encapsulating guest molecules. For more details, see the Review by C.-X. Zhang, Q.-L. Wang, et al. (DOI: 10.1002/chem.202103732).

Encapsulation

Organic molecules

10.1002/chem.202282161

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High-Efficiency Photocatalytic Hydrogen Production by Combining Hierarchical Fecds-Cds Nanorods and Ni-Salens

SSRN Electronic Journal (2022)

Fengdong Wang Xing Yuanyuan Wenhui Su Yi-Cheng Fan Chenxi Zhang

A highly efficient photocatalytic system was rationally designed and prepared for hydrogen production. Through a two-step cation exchange reaction with Cd 2+ ions under alkaline environment, the metal hydroxide shells are precisely assembled on the surface of the MIL-88A, and then the shells are integrated into a heterogeneous metal sulfide shell layer through a thermal vulcanization reaction and achieved doping transition metals in the same moment. This hybrid structure can reduce the volume-surface diffusion length of photogenerated electrons and their recombination. Moreover, Using the molecular cocatalyst (Ni-Salens) in the photocatalytic system can efficiently attract the generated photo-generated electrons and greatly reduces the photo-generated electron-hole recombination, and improves the catalytic efficiency and stability of this catalytic system. The maximum amount of hydrogen produced reached 7956 Î¼molg -1 h -1 , which excesses the most reported CdS-based catalysts recently. This work provides an effective and feasible strategy to improve the efficiency of photocatalytic H 2 production.

Nanorod

10.2139/ssrn.4132131

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