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Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： Peng Zhu Cun Liu Yiren Yu Guoshu Gao Yumeng Zhao Xiongfu Zhang Guodong Liu Guohui Yang state key laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology state key laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFI zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation

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Researches on the Growth Habit and Optical Properties of Fe^(3+) Ion Doped KDP crystal

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Chinese Journal of Structural Chemistry 2007年第10期26卷 1211-1217页

作者：王波房昌水王圣来孙洵顾庆天许心光李毅平 state key laboratory of crystal materials Institute of Crystal MaterialsShandong University

During the process of KDP crystal growth, metal ions strongly affect the growth habit and optical properties of KDP single crystal. In this paper, KDP crystals were grown from an aqueous solution doped with different concentration of Fe^3＋ dopant by traditional temperaturereduction method and ＂point-seed＂ rapid growth method. Furthermore, we examined the light scatter and measured the transmission of these KDP crystals. It is found that the dopant of Fe^3＋ ion can improve the stability of the KDP growth solution when its concentration is less than 30 ppm. The effects of Fe^3＋ ion on the growth habit and optical properties of KDP crystal are also obvious.

关键词： Fe^3+ ion 10P single crystal optical property light scatter

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WSe_2 as a saturable absorber for multi-gigahertz Q-switched mode-locked waveguide lasers [Invited]

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Chinese Optics Letters 2019年第2期17卷 65-69页

作者： Ziqi Li Rang Li Chi Pang Yuxia Zhang Haohai Yu Feng Chen School of Physics state key laboratory of crystal materials Shandong University state key laboratory of crystal materials and institute of crystal materialsShandong University

Graphene and other extraordinary two-dimensional materials together with recent advances in optical modulators have set the foundations for the widespread applications of next-generation optoelectronic devices. In this work, we report on the high-performance fundamentally mode-locked waveguide laser modulated by chemicalvapor-deposition-grown WSe2 as a saturable absorber. By incorporating a WSe2 sample into a monolithic Nd:YVO4 waveguide platform, 6.526 GHz picosecond pulsed laser generation has been achieved at the wavelength of 1 μm with pulse duration of 47 ps.

关键词： WSe2 saturable absorber

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Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

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Journal of Energy Chemistry 2025年第1期100卷 87-93页

作者： Hongrui Sun Sanlong Wang Pengyang Wang Yali Liu Shanshan Qi Biao Shi Ying Zhao Xiaodan Zhang institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University key laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Haihe laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pull”the perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.

关键词： Inverted inorganic perovskite solar cells Flexible molecules Strain release crystallization Energy barrier High PCE

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Angular engineering strategy of an additional periodic phase for widely tunable phase-matched deep-ultraviolet second harmonic generation

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Light(Science & Applications) 2022年第2期11卷 254-261页

作者： Mingchuan Shao Fei Liang Haohai Yu Huaijin Zhang state key laboratory of crystal materials and institute of crystal materials Shandong UniversityJinan 250100China

Manipulation of the light phase lies at the heart of the investigation of light-matter interactions,especially for efficient nonlinear optical ***,we originally propose the angular engineering strategy of the additional periodic phase(APP)for realization of tunable phase matching and experimentally demonstrate the widely tunable phasematched second harmonic generation(SHG)which is expected for dozens of *** an APP quartz crystal,the phase difference between the fundamental and frequency-doubled light is continuously angularly compensated under this strategy,which results the unprecedented and efficient frequency doubling at wavelengths almost covering the deep-UV spectral range from 221 to 332 ***’s more,all the possible phase-matching types are originally realized simultaneously under the angular engineering phase-matching *** work should not only provide a novel and practical nonlinear photonic device for tunable deep-UV radiation but also be helpful for further study of the light-matter interaction process.

关键词： tunable phase matched

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Flexible Graphene Field‑Effect Transistors and Their Application in Flexible Biomedical Sensing

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Nano-Micro Letters 2025年第2期17卷 252-313页

作者： Mingyuan Sun Shuai Wang Yanbo Liang Chao Wang Yunhong Zhang Hong Liu Yu Zhang Lin Han institute of Marine Science and Technology Shandong UniversityQingdao 266237ShandongPeople’s Republic of China state key laboratory of crystal materials Shandong UniversityJinan 250100ShandongPeople’s Republic of China School of Integrated Circuits Shandong UniversityJinan 250100ShandongPeople’s Republic of China Shandong Engineering Research Center of Biomarker and Artificial Intelligence Application Jinan250100ShandongPeople’s Republic of China

Flexible electronics are transforming our lives by making daily activities more *** to this innovation are field-effect transistors(FETs),valued for their efficient signal processing,nanoscale fabrication,low-power consumption,fast response times,and ***,known for its exceptional mechanical properties,high electron mobility,and biocompatibility,is an ideal material for FET channels and *** combination of graphene and FETs has given rise to flexible graphene field-effect transistors(FGFETs),driving significant advances in flexible electronics and sparked a strong interest in flexible biomedical ***,we first provide a brief overview of the basic structure,operating mechanism,and evaluation parameters of FGFETs,and delve into their material selection and patterning *** ability of FGFETs to sense strains and biomolecular charges opens up diverse application *** specifically analyze the latest strategies for integrating FGFETs into wearable and implantable flexible biomedical sensors,focusing on the key aspects of constructing high-quality flexible biomedical ***,we discuss the current challenges and prospects of FGFETs and their applications in biomedical *** review will provide valuable insights and inspiration for ongoing research to improve the quality of FGFETs and broaden their application prospects in flexible biomedical sensing.

关键词： Flexible Graphene Field-effect transistor Wearable Implantable Biosensor

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Two-Photon-Absorption Induced Superradiance of a New Organic Dye PSPS

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Chinese Physics Letters 2002年第5期19卷 739-741页

作者： Zhou Guang-Yong Wang Dong Wang Xiao-Mei Yang Sheng-Jun Xu Xin-Guang Zhao Xian Shao Zong-Shu Jiang Min-Hua state key laboratory of crystal materials Institute of Crystal Materials Shandong University Ji'nan 250100

The linear and nonlinear optical properties of a new two-photon absorption (TPA) dye, trans-4-(4'-pyrrolidinyl styryl)-N-methyl pyridinium methyl sulfate (abbreviated as PSPS) is reported. Intense red superradiance with a peak located at 625nm can be observed from PSPS solution in benzyl alcohol when pumped by a focused picosecond laser beam operated at 1064nm. The lifetimes of one-photon absorption (OPA) and TPA fluorescence were measured to be 370 and 384ps, respectively. The pulse widths of OPA and TPA superradiance were 60 and 58 ps, respectively. The highest net upconversion efficiency from the absorbed pump laser to the upconverted superradiance is 8.3% at the pump energy of 0.6 mJ.

关键词： Two photon processes

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Thermal and Mechanical Properties of a Complex Nonlinear Optical Material:Cadmium Mercury Thiocyanate crystal

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Chinese Physics Letters 2000年第9期17卷 669-671页

作者： YUAN Duo-rong XU Dong ZHANG Guang-hui LIU Ming-guo GUO Shi-yi MENG Fan-qing LU Meng-Kai FANG Qi JIANG Min-Hua institute of crystal materials and state key laboratory of crystal materials Shandong UniversityJi'Pnan 250100

institute of crystal materials and state key laboratory of crystal materials,Shandong University,Ji'nan 250100(Received 18 March 2000)The data of the thermal expansion and specific heat of cadmium mercury thiocyanate crystal have been *** specific heat is 0.7588J/g℃at room *** thermal expansion occurs in the direction parallel to the c-axis,and the thermal contraction occurs in the direction parallel to the *** thermal expansion is the same as the thermal contraction at 353 *** relationship between thermal properties and crystal structure is discussed.

关键词： temperature expansion contraction

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Wildly Tunable, High-Efficiency MgO：PPLN Mid-IR Optical Parametric Oscillator Pumped by a Yb-Fiber Laser

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Chinese Physics Letters 2014年第2期31卷 55-58页

作者：刘善德王兆伟张百涛何京良侯佳杨克建王瑞华刘训民 state key laboratory of crystal materials Institute of Crystal Materials Shandong University Ji'nan 250100

We demonstrate a wildly tunable, high-eFficiency mid-infrared （mid-IR） output-coupled single resonant optical parametric oscillator （OC-SRO） pumped by a Yb-fiber laser. The compact mid-infrared source employs a 50- mm-long, multi-grating MgO-doped periodically poled lithium niobate （MgO-PPLN） crystal, providing as much as 1.73 W idler power at 3.012#m, and 1.27W signal power at 1645nm, corresponding to an overall conversion efficiency of 41.7% and a slope efficiency of 77.9%. In particular, the mid-infrared output power of 1.03 W and 0.67W are obtained at 3.7μm and 3.9μm, respectively, with an optical-to-optical conversion efficiency of 14.3% and 9.3%. Furthermore, the idler light is tunable from 3 μm to 3.9 μm by changing the periods from 31 to 28.5μm, with the output power 〉1 W over 78% of the tuning range. Our experimental results are pump power limited and further mid-IR power and conversion efficiency could be obtained with a suitable high-power pump source. The total OC-SRO output power rms at 2.6 W is about 0.6% during 2 h measurement.

关键词： Optical parametric oscillators

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Two Photon Pumped Upconversion and Nonlinear Optical Properties of a New Lasing Dye: DEASPI

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Chinese Physics Letters 2001年第7期18卷 915-917页

作者： WANG Dong WANG Xiao-Mei ZHOU Guang-Yong WANG Chun SHAO Zong-Shu JIANG Min-Hua state key laboratory of crystal materials Institute of Crystal MaterialsShandong UniversityJi’nan 250100

The two-ephoton pumped frequency upconversion optical properties and the two-photon absorption(TPA)induced nonlinear absorption of a new dye trans-4-[p-(N,N-diethylamino)styryl]-N-methylpyridinium iodide(abbreviated as DEASPI)have been experimentally *** new dye exhibits strong superradiation properties when the pumping power is above the ***,the superradiation upconversion efficiency and the nonlinear absorption at different wavelengths have been *** largest effective molecular TPA cross section was measured to be 3.9 × 10^(-47)cm^(4).s/photon at 930 *** 1064 nm,it was 3.85 × 10^(-48)cm^(4).s/photon,much smaller than that at 930 *** highest upconversion efficiency is 7.57%at 1020 nm,whereas 4.5%at 1064 nm.

关键词： pumped pumping absorption

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