A5067834684- Zeolite Catalysis and Synthesis
- Chemical Synthesis and Characterization
- Catalytic Processes in Materials Science
- Metal-Organic Frameworks: Synthesis and Applications
- Mesoporous Materials and Catalysis
- Catalysis and Oxidation Reactions
- Polyoxometalates: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Ionic liquids properties and applications
- Catalysis and Hydrodesulfurization Studies
- Crystallization and Solubility Studies
- Crystal Structures and Properties
- Catalysis for Biomass Conversion
- Analytical Chemistry and Sensors
- Oxidative Organic Chemistry Reactions
- Advanced NMR Techniques and Applications
- Magnesium Alloys: Properties and Applications
- Electrochemical sensors and biosensors
- Chemical Synthesis and Reactions
- Layered Double Hydroxides Synthesis and Applications
- Catalysts for Methane Reforming
- Nanofabrication and Lithography Techniques
- Advanced Chemical Sensor Technologies
- Electrospun Nanofibers in Biomedical Applications
- Porphyrin and Phthalocyanine Chemistry
Dalian Institute of Chemical Physics
2016-2025
Chinese Academy of Sciences
2016-2025
Dalian National Laboratory for Clean Energy
2016-2025
Collaborative Innovation Center of Chemistry for Energy Materials
2017-2025
Chongqing Jiaotong University
2025
Yunnan Earthquake Prevention and Disaster Reduction
2025
Shenyang Normal University
2008-2024
Xinjiang University
2024
Nanjing University of Posts and Telecommunications
2024
Affiliated Hospital of Southwest Medical University
2024
The methanol-to-olefins (MTO) reaction is an interesting and important for both fundamental research industrial application. Dalian Institute of Chemical Physics (DICP) has developed a MTO technology that led to the successful construction operation world's first coal olefin plant in 2010. This historical perspective gives brief summary on key issues process development, including studies mechanism, molecular sieve synthesis crystallization catalyst its manufacturing scale-up, reactor...
Graphene quantum dots (GQDs) have been widely studied in recent years due to its unique structure-related properties, such as optical, electrical and optoelectrical properties. GQDs are considered new kind of (QDs), they chemically physically stable because intrinsic inert carbon property. Furthermore, environmentally friendly non-toxic biologically which attracted worldwide interests from academic industry. In this review, a number preparation methods, hydrothermal method,...
Magnesium (Mg) and its alloys have been suggested as revolutionary biodegradable materials. However, fast degradation hinders clinic application. To improve the corrosion resistance biocompatibility of Mg-Nd-Zn-Zr alloy (JDBM), magnesium-aluminum-layered double hydroxide (Mg-Al LDH) was successfully introduced into Mg(OH)2 coating by hydrothermal treatment. The anions in interlayer Mg-Al LDH can be replaced chloride ions, resulting a relatively low ion concentration near surface coating....
The heptamethylbenzenium cation (heptaMB(+)) has been speculated to be one of the most important active intermediates involved in "hydrocarbon pool" mechanism methanol-to-olefin (MTO) conversion. By use DNL-6, a newly synthesized SAPO-type molecular sieve with large cavities, heptaMB(+) for first time directly observed during methanol conversion under real working conditions. (13)C-labeling experiments suggested that olefin formation mediated by mainly follows side-chain mechanism.
Hierarchical SAPO-34 catalysts with different morphologies were synthesized by using dual template [3-(trimethoxysilyl)propyl]octadecyldimethylammonium chloride and diethylamine. Because of its optimal porosity acidity, hierarchical exhibited excellent catalytic performance in the MTO reaction.
Organic reaction intermediates confined in zeolite cavities are very important for product formation during methanol-to-olefins (MTO) conversion; however, direct evidence is still required to understand the particular function of these intermediates. Herein, first time, by careful selection SAPO molecular sieves with different cavity size but identical 8MR pore openings, reactivity and role played olefin generation verified isotopic tracing method theoretical calculations based on...
The synthesis and catalytic applications of nano-hierarchical SAPO-34 for MTO conversion have received great significance.
Zeolites are usually considered to be acid catalysts, which prone deactivation due the coke deposition in hydrocarbon conversions such as methanol-to-olefins (MTO) reaction. Herein, a high-pressure MTO process with cofeeding H2 and H2O is reported, can effectively prolong catalytic lifetime of SAPO-34. The corresponding methanol handling capacity about 200 times larger than that under normal-pressure condition. Investigation reveals ultralong originates from hydrogenation ability sites on...
Silicoaluminophosphate SAPO-34 molecular sieve nanocrystals have been prepared by a post-synthesis milling and recrystallization method, which is further proven to be universally applicable other SAPO sieves. The obtained with reduced Si enrichment on the external surface shows considerably improved catalytic performance in MTO reaction.
A facile low-temperature approach has been developed to synthesize low-silica SAPO-34 nanocrystals with excellent catalytic performance in the MTO reaction.
Pyridine-modified mordenite (MOR) zeolite catalysts have attracted great attention in recent years due to their unique shape selectivity within eight-membered ring (8-MR) side pockets for dimethyl ether (DME) carbonylation methyl acetate (MA) and syngas conversion ethylene. Herein, aimed at elucidating pyridine modification–carbonylation activity relationships developing high-performance catalysts, we investigated the adsorption/desorption behaviors of on MOR zeolites with varying Si/Al...
We report an anisotropic-kinetics transformation strategy to prepare single-crystalline aluminosilicate MFI zeolites (ZSM-5) with highly open nanoarchitectures and hierarchical porosities. The methodology relies on the cooperative effect of in situ etching recrystallization evolution pure-silica zeolite (silicalite-1) nanotemplates under hydrothermal conditions. enables a controllable preparation ZSM-5 nanostructures diverse geometries by tuning relative rate difference between processes....
Abstract Background Osteoporosis is a disease threatening the health of millions individuals. Melatonin found to be potential anti-osteoporosis drug. However, whether melatonin plays role against osteoporosis at different stages menopause and underlying mechanisms are unknown. Methods Ovariectomy was utilized as model perimenopausal postmenopausal osteoporosis. A total 100 mg/kg melatonin, or solvent alone, added drinking water rats over 8 weeks. Perimenopausal immediately received...
Four Ag-based coordination polymers [Ag(Bim)] (1), [Ag2(NIPH)(HBim)] (2), [Ag6(4-NPTA)(Bim)4] (3) and [Ag2(3-NPTA)(bipy)0.5(H2O)] (4) (HBim = 1H-benzimidazole, bipy 4,4′-bipyridyl, H2NIPH 5-nitroisophthalic acid, H2NPTA 3-/4-nitrophthalic acid) have been synthesized by hydrothermal reaction of Ag(I) salts with N-/O-donor ligands. Single-crystal X-ray diffraction indicated that these constructed from mononuclear or polynuclear silver building blocks exhibit three typical structure features...
Abstract Mass transfer of guest molecules in nanoporous crystalline materials has gained attention catalysis, separation, electrochemistry, and other fields. Two mechanisms, surface barriers intracrystalline diffusion, dominate the mass transport process. Lack methods to separately quantify these two mechanisms restricts further understanding thus rational design efficient application materials. Here we derive an approximate expression uptake rate relying solely on permeability, offering...