A5010244244- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Metallic Glasses and Amorphous Alloys
- Vehicle emissions and performance
- Glass properties and applications
- Optical Systems and Laser Technology
- Theoretical and Computational Physics
- Inorganic Fluorides and Related Compounds
- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Odor and Emission Control Technologies
- nanoparticles nucleation surface interactions
- Advanced Sensor and Control Systems
- Infrared Target Detection Methodologies
- Material Dynamics and Properties
- Advanced Chemical Sensor Technologies
- Indoor Air Quality and Microbial Exposure
- Luminescence Properties of Advanced Materials
- CCD and CMOS Imaging Sensors
- Iron-based superconductors research
- Photocathodes and Microchannel Plates
- Thermodynamic and Structural Properties of Metals and Alloys
- Copper-based nanomaterials and applications
Jinan University
2020-2025
Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality
2020-2025
Jiangxi Academy of Sciences
2018-2023
Guangdong Polytechnic Normal University
2022
Qilu University of Technology
2021
Southwest Jiaotong University
2021
Electronics Research Institute
2020
Nanjing University of Information Science and Technology
2020
Karlsruhe Institute of Technology
2013-2019
Nanjing University of Science and Technology
2017-2018
Secondary organic aerosol (SOA) constitutes a large fraction of worldwide, however, the formation mechanisms in polluted environments remain poorly understood. Here we observed fast daytime growth oxygenated (OOA) (with rates up to 10 μg m–3 h–1) during low relative humidity (RH, average 38 ± 19%), high RH (53 and fog periods (77 13%, occurring nighttime with reaching 100%). Evidence showed that photochemical aqueous-phase SOA (aqSOA) dominantly contributed OOA fog, while both aqSOA...
Abstract. Volatile organic compounds (VOCs) play important roles in the tropospheric atmosphere. In this study, VOCs were measured at an urban site Guangzhou, one of megacities Pearl River Delta (PRD), using a gas chromatograph–mass spectrometer/flame ionization detection (GC–MS/FID) and proton transfer reaction time-of-flight mass spectrometer (PTR-ToF-MS). Diurnal profile analyses show that stronger chemical removal by OH radicals for more reactive hydrocarbons occurs during daytime, which...
Abstract. The atmospheric processes under polluted environments involving interactions of anthropogenic pollutants and natural emissions lead to the formation various complex secondary products. Therefore, characterization oxygenated organic compounds in urban areas remains a pivotal issue our understanding evolution carbon. Here, we describe measurements an iodide chemical ionization time-of-flight mass spectrometer installed with Filter Inlet for Gases AEROsols (FIGAERO-I-CIMS) both gas...
Abstract. Ambient nitrate has been of increasing concern in PM2.5, while there are still large uncertainties quantifying the formation aerosol. The pathways aerosol at an urban site and a suburban Pearl River Delta (PRD) investigated using observation-constrained box model. Throughout campaigns, pollution episodes were constantly accompanied with increase concentrations fractions both sites. simulations demonstrate that chemical reactions daytime night contributed significantly to boundary...
Abstract To investigate the chemical compositions, sources, and aging processes of submicron particles (PM 1 ), a comprehensive field campaign was conducted in Guangzhou urban area China during autumn (October–November) 2018. The average mass concentration PM 35.6 ± 20.8 µg m −3 , which mainly contributed by organic aerosols (OA, 42%), then followed sulfate (25%) inorganic nitrate (11%). found to be main driving component (up ∼50%) account for fast increase polluted periods autumn. promotion...
Abstract. Higher alkanes are a major class of intermediate-volatility organic compounds (IVOCs), which have been proposed to be important precursors secondary aerosols (SOA) in the atmosphere. Accurate estimation SOA from higher and their oxidation processes atmosphere is limited, partially due difficulty measurement. High-time-resolution (10 s) measurements were performed using NO+ chemical ionization proton transfer reaction time-of-flight mass spectrometry (NO+ PTR-ToF-MS) at an urban...
Oxygenated volatile organic compounds (OVOCs) and secondary aerosol (SOA) formation potential of ambient air in Guangzhou, China was investigated using a field-deployed oxidation flow reactor (OFR). The OFR used to mimic hours weeks atmospheric exposure hydroxyl (OH) radicals within the 2–3 min residence time. A comprehensive investigation on variation VOCs OVOCs as function OH is shown. Substantial acids nitrogen-containing OVOC species were observed. Maximum SOA observed following 1–4...
Abstract. Volatile organic compounds (VOCs) regulate atmospheric oxidation capacity, and the reactions of VOCs are key in understanding ozone formation its mitigation strategies. When evaluating their impact, most previous studies did not fully consider role oxygenated due to limitations measurement technology. By using a proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS) combined with gas chromatograph–mass (GC–MS), large number (OVOCs) have been quantified Guangzhou...
Abstract. Vehicular emissions are an important source for volatile organic compounds (VOCs) in urban and downwind regions. In this study, we conducted a chassis dynamometer study to investigate VOC from vehicles using gasoline, diesel, liquefied petroleum gas (LPG) as fuel. Time-resolved chemically characterized by proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS) with high frequency. Our results show that emission factors of VOCs generally decrease the improvement...
Crystal growth of cubic BaTiO3 in the presence polyethylene glycol-200 (PEG-200) is investigated step by using powder X-ray diffraction, scanning electron microscopy, and transmission microscopy. Titanium precursor Ti(OC4H9)4 aggregates with PEG to form spherical colloidal particles at very beginning. Multiple nucleation takes place on surface these particles. The nanocrystallites then self-adjust their orientations likely under dipole–dipole interaction and/or intercrystallite interactions...
Nanoglasses represent a novel structural modification of amorphous materials, exhibiting properties and details that are markedly different from those observed in metallic glasses prepared by rapid quenching. In this review, the synthesis method techniques used for charactering structure nanoglasses described together with our current understanding their salient microstructural features. It is believed consists two distinct regions give rise to mechanical, thermal, magnetic significantly...
Isocyanic acid (HNCO) is a potentially toxic atmospheric pollutant, whose concentrations are hypothesized to be linked adverse health effects. An earlier model study estimated that of isocyanic in China highest around the world. However, measurements ambient air have not been available China. Two field campaigns were conducted measure using high-resolution time-of-flight chemical ionization mass spectrometer (ToF-CIMS) two different environments The ranges mixing ratios from below detection...
Abstract. Volatile chemical products (VCPs) have become an important source of reactive organic gases (ROGs) in urban areas worldwide. Industrial activities can also utilize a large number VCPs and emit many into the atmosphere. Due to multiple sampling measurement challenges, only subset ROG species is usually measured for industrial VCP sources. This study aims investigate emissions ROGs from five sources Pearl River Delta (PRD) region China, including shoemaking, plastic surface coating,...
Hydrothermal growth, structural analyses, and growth kinetics of anatase nanoparticles have been paid extensive attention. The was generally related to either Ostwald ripening (OR) or orientation attachment (OA). However, very few works about hydrothermal crystallization covered both OR OA. In this work, we present a unique three-stage in succinic acid: OA, shrinkage, OR. procedures are experimentally monitored by powder X-ray diffraction (XRD) patterns transmission electron microscopy (TEM)...
Abstract A variety of hexagonal sodium yttrium fluoride (NYF) crystals with tunable shapes have been grown, and their up‐conversion (UC) emission has greatly improved after post‐treatment in an aqueous solution NH 4 HF 2 NaF. The enhancement attributed to topotactic ion insertion cations into the channels Na 3 x Y 2– F 6 . As sodium‐ion continues occur content rises, intensity green‐to‐red ratio increase up saturation level. However, X‐ray diffraction patterns SEM images suggest that both...
Abstract Strain localization during plastic deformation drastically reduces the shear band stability in metallic glasses, ultimately leading to catastrophic failure. Therefore, improving plasticity of glasses has been a long-standing goal for several decades. In this regard, nanoglass, novel type glass, proposed exhibit differences short and medium range order at interfacial regions, which could promote formation transformation zones. present work, by introducing heterogeneities nanoscale,...
Abstract Nanostructures of FeSe x with a tetragonal PbO‐type phase have been grown through new and simple solvothermal route. By adding polyvinyl pyrrolidone (PVP) as controlling reagent, the products change from nanoflowers to regular square nanoplates. Both structure are identified by powder X‐ray diffraction electron microscopy. The nanoplates revealed be enclosed two larger (001) planes four equivalent smaller {100} side surfaces. choice solvent is also important for successful synthesis...