Lian Wang

State Key Joint Laboratory of Environment Simulation and Pollution Control

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Hong He

Chinese Academy of Sciences

Changbin Zhang

State Key Joint Laboratory of Environment Simulation and Pollution Control

Jinzhu Ma

Institute of Urban Environment

Hua Deng

Institute of Urban Environment

Yunbo Yu

Research Center for Eco-Environmental Sciences

Jun‐An Ma

Tianjin University

Yuqin Lu

Nanjing Tech University

Jing Nie

Tianjin University

Tobin J. Marks

Northwestern University

Tingting Pan

Chinese Academy of Sciences

Cooperative Institutions

Chinese Academy of Sciences

University of Chinese Academy of Sciences

University of Science and Technology of China

Research Center for Eco-Environmental Sciences

State Key Joint Laboratory of Environment Simulation and Pollution Control

Zhejiang University

Huazhong University of Science and Technology

Northwestern University

Tianjin University

Sichuan University

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Organic electro-optic modulator using transparent conducting oxides as electrodes

Optics Express (2005)

Guoyang Xu Zhifu Liu Jing Ma Boyang Liu Seng Tiong Ho

A novel organic electro-optic (EO) modulator using transparent conducting oxides (ZnO and In2O3) as electrodes is demonstrated for the first time. The modulator employs the poled guest-host chromophore/polymer material AJL8/APC having r33=35pm/V and is able to achieve a low Vpi=2.8 V switching voltage for an 8mm-long device at a wavelength of 1.31ìm. This corresponds to a Vpi=1.1 V switching voltage for a 1cm-long device in a push-pull configuration. The push-pull VpiL figure of merit normalized for the EO coefficient is thus 1.1V-cm/(35pm/V), which is 3-4x lower than that can be achieved with a convetional modulator structure. The bottom electrode is ZnO grown by Metal-Organic Vapor Deposition (MOCVD) and top electrode In2O3 deposited using ionbeam assisted deposition. The top electrode is directly deposited on the guest-host organic material. The design and fabrication considerations for the modulator are also discussed.

Figure of Merit

Chromophore

Deposition

10.1364/opex.13.007380

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Citations (70)

Adsorptive removal of toluene and dichloromethane from humid exhaust on MFI, BEA and FAU zeolites: An experimental and theoretical study

Chemical Engineering Journal (2020)

Hua Deng Tingting Pan Yan Zhang Lian Wang Qinming Wu

Dichloromethane

10.1016/j.cej.2020.124986

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Citations (86)

Interaction between Noble Metals (Pt, Pd, Rh, IR, Ag) and Defect-Enriched Tio2 and its Application in Toluene and Propene Catalytic Oxidation

SSRN Electronic Journal (2022)

Yuqin Lu Hua Deng Tingting Pan Lian Wang Changbin Zhang

The nano-particle size, electronic state, as well as metal-support interaction of noble metal supported catalysts significantly influence their VOC oxidation performance. A series of noble metals (including Pt, Pd, Rh, Ir, and Ag) was successfully loaded on TiO 2 modified by hydrogen reduction to scrutinize their effects on toluene and propene combustion. The prepared catalysts were characterized by SEM, TEM, BET, XRD, ESR, UV-vis, H 2 -TPR, XPS, in-situ DRIFTS, GC-MS and DFT calculations. It was interesting to note that all the noble metals could be well-dispersed on the low-surface-area TiO 2 support and modulated its properties. The electron transfer ability and oxygen mobility of the as-prepared materials were enhanced via noble metal doping. Among them, the Pd/TiO 2 and Pt/TiO 2 catalysts exhibited excellent catalytic performance via inducing local electron transfer from TiO 2 to the noble metal NPs via the strong metal-support interaction. Experimental results and theoretical calculations revealed that the activation of toluene, propene and oxygen on suitable interfaces contributed to the good performance of the Pd and Pt catalysts. This work explored and elucidated the effects of electron-rich noble metal catalysts in enhancing the activation of ground-state oxygen.

Propene

Noble metal

10.2139/ssrn.4169682

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Stereoselective construction of fluorinated indanone derivatives via a triple cascade Lewis acid-catalyzed reaction

Chemical Communications (2007)

Han‐Feng Cui Ke‐Yan Dong Guangwu Zhang Lian Wang Jun‐An Ma

A one-pot three-component cascade reaction proceeds by way of a Lewis acid-catalyzed Knoevenagel condensation/Nazarov cyclization/electrophilic fluorination sequence to afford fluorinated 1-indanone derivatives in moderate to good yields with high diastereoselectivities.

Knoevenagel condensation

Cascade reaction

Lewis acid catalysis

Sequence (biology)

10.1039/b702114c

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Citations (53)

Palladium-catalyzed cross-coupling of benzylzinc reagents with 2-bromo-3,3,3-trifluoropropene

Synthetic Communications (2019)

An‐Jun Wang Yue‐Guang Lou Liang Zhao Fei‐Hu Gou Lian Wang

α-Trifluoromethyl alkenes can be used as peptide isosteres, moreover, the pre-installed vinyl group make it possible that transformation to diverse fluorine-containing unities. However, the cross-coupling of benzyl group with α-trifluoromethyl alkenes has yet to be developed. In this report, we describe a general method for the cross-coupling of benzylzinc reagents with 2-bromo-3,3,3-trifluoropropene (BTP) to afford diverse α-trifluoromethylalkene derivatives by using Pd(TFA)2 as catalyst. This method takes advantage of cheap industrial available fluorine building blocks and easily prepared benzylzinc reagents to generate α-trifluoromethylalkene derivatives, which features with mild reaction conditions, wide substrate scope and feasibility of product transformations.

Fluorine

Coupling reaction

Scope (computer science)

10.1080/00397911.2019.1663540

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Citations (2)

Chemisorption of a hydrogen adatom on metal doped α -Zr (0 0 0 1) surfaces in a vacuum and an implicit solvation environment

Nuclear Materials and Energy (2017)

Cheng Zeng Ben Wang Lian Wang Yingying Li Yifan Nie

Abstract First-principles calculations have been carried out to investigate the adsorption of a hydrogen adatom on 24 metal doped α-Zr (0 0 0 1) surfaces in both a vacuum and an implicit solvation environment. The dopant are the elements in the 4th and 5th periods in the periodic table. Doping elements at the tail of the 4th and 5th periods can significantly reduce the hydrogen pickup in a vacuum environment. A weighted d-band center theory is used to analyze the doping effect. On the other hand, the hydrogen adsorption energies in water are relatively lower for all doped slabs and the surface adsorption of hydrogen adatom is stronger than that in a vacuum environment, especially, for the slabs with doping elements at the tail of the 4th and 5th periods. In the solvation environment, electronegativity difference affects the adsorption. Doping elements Ag, Ga, Ge, Sn, and Sb can reduce the hydrogen pickup in vacuum, while Ag and Cu can reduce the hydrogen pickup of the zirconium alloys in solvent environment.

Chemisorption

10.1016/j.nme.2017.09.006

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Citations (7)

An Efficient Procedure for the Production of trans-4-Hydroxy-L-proline Using Recombinantly Expressed Proline Hydroxylase

Scientia Iranica (2015)

Jiaojiao Chen Dandan Gu Tianyun Li Jiansong Ju Zhangwei Xue

Due to the codon usage and high G+C contentof thetrans-4-proline-L-hydroxylase gene from the Dactylosporangium sp.strain RH1, the whole gene was optimized and cloned into several vectors for expression. In biotransformations with resting cells, the activity of the enzyme was investigated. The in-house modified plasmid pet-M-3C was found to yield the highest enzymatic activity. Additionally, after the primary fragment screening, the conversion efficiency of fragment 1-257 aa was enhanced from 76.60% to 88.97% compared with the full-length proline 4-hydroxylase within 60 h; we also found that truncation of the gene improved the solubility of the encoded protein.After optimizing the various induction conditions with respect to the enzymatic activity of the engineered strain, including the concentration of the inducer IPTG, the cell density before the inducer was added, the induction temperature and the induction time, the conversion efficiency was more than 97%within 48 h.

Inducer

Strain (injury)

Source

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Citations (4)

A perfect double role of CF3 groups in activating substrates and stabilizing adducts: the chiral Brønsted acid-catalyzed direct arylation of trifluoromethyl ketones

Chemical Communications (2009)

Jing Nie Guangwu Zhang Lian Wang Aiping Fu Yan Zheng

A direct and efficient Brønsted acid-promoted arylation of tri- and difluoromethyl ketones, as well perfluoroalkyl ketones, has been developed; good to excellent enantioselectivities (up to 99% ee) were achieved.

Brønsted–Lowry acid–base theory

10.1039/b900474b

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Citations (105)

Radionuclide and Metal Sorption on Cement and Concrete

Topics in safety, risk, reliability and quality (2015)

Michael F. Ochs Dirk Mallants Lian Wang

Cementitious

10.1007/978-3-319-23651-3

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Citations (135)

Microstructure and Properties of New Zirconium Alloys for CAP1400 Fuel Assembly

Qifeng Zeng Libing Zhu Gaihuan Yuan Lian Wang Guocheng Sun

Two Zr-Sn-Nb alloys with minor Germanium or silicon additions were prepared by traditional manufacturing process to meet the design requirements. Transmission electron microscope (TEM) and scanning electron microscope (SEM) were utilized to characterize the detail microstructure of base alloys. Corrosion resistance was examined by the weight gain in static autoclave with different water chemistry environments. The mechanical properties at room temperature and elevated temperature were evaluated by conventional tensile testing. Thermal creep resistance was evaluated by an internally-pressurized creep test at 385 °C with hoop stresses of about 108 MPa and 150 MPa (during 24 h). It was found that SZA-6 and SZA-4 alloys consisted of partially recrystallized grain structures with uniformly distributed fine second phase particles (SPPs) located within grain interior and at grain boundaries. Both SZA-4 and SZA-6 alloys exhibited excellent corrosion resistance in two water chemistry conditions. The corrosion resistance of SZA-6 was better than the reference commercial alloy, and SZA-4 was slightly better than SZA-6. The mechanical properties of two new zirconium alloys were comparable, and both of them can meet the design criterion. Moreover, the thermal creep resistance of SZA-4 and SZA-6 alloys was equivalent to existing commercial alloy. Considering the outstanding corrosion resistance, satisfied mechanical properties and thermal creep resistance, SZA-4 and SZA-6 alloys were suggested as promising alloys used for CAP1400 fuel assembly in the future.

Autoclave

10.1115/icone25-66951

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Citations (1)