A5010289866- Catalytic Processes in Materials Science
- Zeolite Catalysis and Synthesis
- Catalysis and Oxidation Reactions
- Mesoporous Materials and Catalysis
- Catalysis and Hydrodesulfurization Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Catalysis for Biomass Conversion
- Nanomaterials for catalytic reactions
- Ammonia Synthesis and Nitrogen Reduction
- Advanced Photocatalysis Techniques
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Chemical Synthesis and Characterization
- Polyoxometalates: Synthesis and Applications
- Asymmetric Hydrogenation and Catalysis
- Carbon dioxide utilization in catalysis
- TiO2 Photocatalysis and Solar Cells
- Catalysts for Methane Reforming
- Hydrogen Storage and Materials
- Copper-based nanomaterials and applications
- Industrial Gas Emission Control
- Electrocatalysts for Energy Conversion
- Oxidative Organic Chemistry Reactions
- Advanced Nanomaterials in Catalysis
- Gas Sensing Nanomaterials and Sensors
Nankai University
2016-2025
Guangzhou University
2025
Sun Yat-sen University
2024-2025
Chinese Academy of Sciences
1999-2025
Fujian Institute of Research on the Structure of Matter
2024-2025
Fuzhou University
2025
Quanzhou Institute of Equipment Manufacturing Haixi Institute
2025
Northwestern Polytechnical University
2025
Catalytic Materials (United States)
2024-2025
Nanjing University
2025
Titanium dioxide is a promising photocatalyst for water splitting, but it suffers from low visible light activity due to its wide band gap. Doping can narrow the gap of titanium dioxide; however, new charge-carrier recombination centres may be introduced. Here we report design sub-10 nm rutile nanoparticles, with an increased amount surface/sub-surface defects overcome negative effects bulk defects. Abundant not only shift top valence upwards band-gap narrowing also promote separation. The...
The sole effect of surface/bulk defects TiO2 samples on their photocatalytic activity was investigated. Nano-sized anatase and rutile were prepared by hydrothermal method adjusted simply calcination at different temperatures, i.e. 400–700 °C. High temperature calcinations induced the growth crystalline sizes a decrease in surface areas, while phase exposed facets kept unchanged during calcination, as indicated characterization results from XRD, Raman, nitrogen adsorption–desorption, TEM...
Substoichiometric tungsten oxide single-crystal nanosheets are successfully prepared via the exfoliation of layered tungstic acid and subsequent introduction oxygen vacancies. The combination different strategies, i.e., 2D-structure construction, surface vacancies, creation localized plasmon resonance can promote light-harvesting performance through accumulative synergistic effects.
Oxygen evolution reaction (OER) is a pivotal in many technologies for renewable energy, such as water splitting, metal-air batteries, and regenerative fuel cells. However, this known to be kinetically sluggish proceeds at rather high overpotential due the universal scaling relationship, namely, adsorption energies of intermediates are linearly correlated cannot optimized simultaneously. Several approaches have been proposed break relationship by introducing additional active sites; however,...
Nanocrystalline Sn-Beta zeolites have been successfully prepared via an improved two-step postsynthesis strategy, which consists of creating vacant T sites with associated silanol groups by dealumination parent H-Beta and subsequent dry impregnation the resulting Si-Beta organometallic dimethyltin dichloride. Characterization results from UV–vis, XPS, Raman, 119Sn solid-state MAS NMR reveal that most Sn species incorporated into framework Beta zeolite through process exist as isolated...
Zeolites that prefer alkynes Alkenes such as ethylene and propene must be separated from before they can converted in polymers. Drawbacks current methods, hydrogenation of producing unwanted alkanes, has spurred interest sorption separation methods. have generally been inefficient, given the similar sizes volatilities molecules. Chai et al. incorporated atomically dispersed divalent transition metal cations into faujasite zeolite found nickel-containing analog efficiently removed olefins...
ConspectusZeolites, accompanied by their initial discovery as natural mines and the subsequent large-scale commercial production, have played indispensable roles in various fields such petroleum refining chemical industry. Understanding characteristics of zeolites, contrast to counterparts with similar compositions origin thereof, is always a hot challenging topic. Zeolites are known intrinsic confined systems ordered channels on molecular scale, structural confinement has been proposed...
SAPO-34 materials with comparable Brønsted acid site density but different crystal sizes were applied as methanol-to-olefin (MTO) catalysts to elucidate the effect of size on their deactivation behaviors. 13C HPDEC MAS NMR, FTIR, and UV/vis spectroscopy employed monitor formation nature organic deposits, densities accessible sites active hydrocarbon-pool species studied a function time-on-stream (TOS) by 1H NMR spectroscopy. The above-mentioned spectroscopic methods gave very complex picture...
Little is known on the early stages of methanol-to-olefin (MTO) conversion over H-SAPO-34, before steady-state with highly active polymethylbenzenium cations as most important intermediates reached. In this work, formation and evolution carbenium ions during MTO a H-SAPO-34 model catalyst were clarified via 1H MAS NMR 13C NMR. Several initial species (i.e., three-ring compounds, dienes, polymethylcyclopentenyl, polymethylcyclohexenyl cations) were, for first time, directly verified...
Mesoporous Zr-Beta exhibits a remarkable catalytic activity and regio-selectivity to β-amino alcohols in epoxide aminolysis. Intra-crystalline mesopores greatly promote the reaction through enhanced mass transfer suppress deactivation.
The selective hydrogenation of alkynes to alkenes is an important type organic transformation with large-scale industrial applications. This requires efficient catalysts precise selectivity control, and palladium-based metallic are currently employed. Here we show that four-coordinated cationic nickel(II) confined in zeolite can efficiently catalyze the acetylene ethylene, a key process for trace removal prior polymerization process. Under optimized conditions, 100% conversion ethylene up...
Methane, an abundant and clean fossil energy source, can provide the highest specific compared with other hydrocarbons. Exploiting efficient way to convert methane fuel or chemicals is, therefore, of significant importance economically as well in terms sustainability. Generally, is first converted syngas industry, which further transformed liquid hydrocarbons via a Fischer–Tropsch process. Methane also directly pyrolyzed olefins aromatic coupled C 2 products at very high temperatures. Among...
Zeolite crystals offering a short diffusion pathway through the pore network are highly desired for number of catalytic and molecule separation applications. Herein, we develop simple synthetic strategy toward reducing thickness along b-axis MFI-type crystals, thus providing path straight channel. Our approach combines preliminary aging fluoride-assisted low-temperature crystallization. The synthesized MFI in micrometer-size range a- c-axis, while is few tens nanometers. synthesis parameters...
Understanding the unique behaviors of atomically dispersed catalysts and origin thereof is a challenging topic. Herein, we demonstrate facile strategy to encapsulate Ptδ+ species within Y zeolite reveal nature selective hydrogenation over Pt@Y model catalyst. The configuration Pt@Y, namely stabilized by surrounding oxygen atoms six-membered rings shared sodalite cages supercages, enables exclusive heterolytic activation dihydrogen Ptδ+···O2- units, resembling well-known classical Lewis...
Ti-Beta zeolite prepared <italic>via</italic> a reproducible and scalable two-step post-synthesis strategy is robust catalyst for the epoxidation of unsaturated ketones with hydrogen peroxide.
Silicoaluminophosphates (SAPO) with different framework structures and amounts of Brønsted acid sites, that is, SAPO-34, SAPO-41, SAPO-11, SAPO-46, were synthesized studied as catalysts for the methanol-to-olefin (MTO) conversion. Besides well-known SAPO-34 catalyst, also SAPO-41 exhibits a good MTO performance methanol conversion 100% selectivity to light olefins about 70% at reaction temperature 723 K, which maintains up time-on-stream 10 h. The sites silicoaluminophosphate employed in...