Article
Polymer Science
Deling Li, Shuang Liu, Liqiang Gu, Guanghui Li, Yue Ding, Liming Dong
Summary: Rare earth complexes with curcumin were prepared and characterized as PVC heat stabilizers. The complexes showed an improvement in both static and dynamic thermal stability of PVC, possibly by coordinating with Cl and double bonds on the PVC chains to form cross-linked chains.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Chemistry, Applied
Zhimin Fu, Zhanhong Yang, Lie Deng, Yao Rong, Jian Wu
Summary: THAM and its derivative have been proven to be good organic thermal stabilizers for flexible PVC, with THAM showing excellent thermal stability and DHD having a synergistic effect with traditional stabilizers. In contrast, PER has no thermal stabilizing efficiency for PVC when used alone. Additionally, a possible mechanism explaining the stabilizing efficiency of THAM has been proposed at the end of the article.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Wei Luo, Yang Yang, Yu Han, Yunxuan Weng, Caili Zhang
Summary: The development of bio-based heat stabilizers, epoxidized cardanol oleate (ECD-OA) and epoxidized cardanol myristate (ECD-MA), with different alkyl chain lengths and epoxy contents, was explored for improving the thermal stability and compatibility for polyvinyl chloride (PVC). The thermal stabilizing effects of these two heat stabilizers were compared with traditional stabilizers and bio-based epoxidized soybean oil. The results showed that ECD-MA exhibited the best thermal stability and compatibility with PVC, resulting in high ductility and tensile strength of the PVC films.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Zhi Rao, Kaitao Li, Pingli Liu, Yanjun Lin, Xiang Lyu
Summary: Poly(vinyl chloride) (PVC) requires the use of thermal stabilizers to enhance its thermal stability during processing. Layered double hydroxides (LDHs) are considered to be highly efficient and environmentally friendly PVC thermal stabilizers. The thermal stabilizing process of LDHs on PVC mainly has three stages. The interaction between LDHs and different interlayer anions has an impact on the stability of PVC, with LDHs that have a weak interaction between interlayer anions and layers enhancing the early stability of PVC significantly. LDHs with high HCl absorption capacities exhibit superior long-term stabilizing effects on PVC resin.
Article
Polymer Science
Jinsheng Duan, Zhaogang Liu, Guifang Du, Jiameng Feng, Jingang Zhao, Peijie Jia, Yanhong Hu, Jinxiu Wu
Summary: Lanthanum terephthalate (LTP) was synthesized and used as a heat stabilizer for polyvinyl chloride (PVC). The effects of LTP on thermal stability and discoloration of PVC were studied. LTP exhibited poor anti-discoloration performance but satisfactory long-term stability. When mixed with other compounds, LTP showed excellent antidiscoloration and long-term static stability, ensuring good dynamic thermal stability, processing, and mechanical properties. The thermal stability mechanism of LTP in PVC involved absorbing HCl gas to inhibit PVC degradation.
IRANIAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Shao-you Liu, Li-hui Ou, Qian Wang, You Long, Dan Ren, Zhang Yu-ping, Chen De-liang, Chen Yuan, Chen Meng-jun
Summary: In this study, glycerol zinc and glycerol bismuth micro-nanopowders were prepared by solid-phase reaction and their theoretical calculation and structural characterization were performed. The thermal stability of glycerol zinc and glycerol bismuth in PVC was discussed and it was found that they can be used as thermal stabilizers for PVC. The addition of glycerol zinc and glycerol bismuth significantly increased the thermal stability time of PVC.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Applied
Deling Li, Congcong Luo, Bing Yao, Yue Ding, Jizhen Ren
Summary: The rheological properties and dynamic thermal stability of PVC stabilized by La L-2/Ca-Zn composite stabilizers were significantly improved. An optimal synergistic effect was observed when the mass ratio of La L-2 to Ca-Zn stabilizer was 8:2.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Dan Zhao, Ming Chen, Zhipeng Pi, Fan Zhang
Summary: This study focuses on the effects of rare-earth dopants on the phase equilibria and phase stability of tetragonal zirconia in ZrO2-RETaO4 systems. The composition range of non-transformable t-ZrO2 in ZrO2-YbTaO4, ZrO2-DyTaO4, and ZrO2-GdTaO4 is measured to be about 30-41, 22-29, and 16-19 mol% RE0.5Ta0.5O2, respectively. However, non-transformable t-ZrO2 cannot be found in ZrO2NdTaO4 and ZrO2-LaTaO4. These findings are valuable for the development of appropriate thermal barrier coatings.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Yanqin Shi, Lukai Chen, Songyan Lu, Yuchen Yao, Si Chen, Huiwen He, Meng Ma, Xu Wang
Summary: A new organic zinc thermal stabilizer, zinc arginine stearate [Zn(Arg)(St)], has been designed by introducing arginine and stearate to the same zinc atoms to regulate the binding energy. Experimental results show that Zn(Arg)(St) has excellent thermal stability properties, including initial whiteness and whiteness retention time. The thermal stability mechanism can be attributed to the replacement of unstable chlorine atoms by arginine and stearate anions, as well as the inhibition of zinc burning and autocatalytic effects. Zn(Arg)(St) also exhibits remarkable lubrication effect, further enhancing the thermal stability of PVC.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Youjie Sheng, Yunchuan Peng, Shanwen Zhang, Ying Guo, Li Ma, Hanling Zhang
Summary: This study prepared mixed dispersions of SiO2 nanoparticles with different specific surface areas, nonionic surfactants, and fluorocarbon surfactants in water, and investigated their molecular interactions and the impact on foam stability. The results showed that the addition of nanoparticles can enhance the thermal stability of foam and contribute to the development of environmentally friendly firefighting foams.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Construction & Building Technology
Yingcheng Luan, Xuejun Ma, Yuan Ma, Xinyu Liu, Shuangquan Jiang, Jianming Zhang
Summary: The paper studies the effects of a liquid polymer soil stabilizer on the physical and chemical properties of clay soil. The results show that the stabilizer content and curing time have an impact on the soil strength and water stability. The study of mineralogy and chemistry reveals that the polymer stabilizer has filling and bonding effects on the soil.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Multidisciplinary Sciences
C. Y. Hu, A. Achari, P. Rowe, H. Xiao, S. Suran, Z. Li, K. Huang, C. Chi, C. T. Cherian, V. Sreepal, P. D. Bentley, A. Pratt, N. Zhang, K. S. Novoselov, A. Michaelides, R. R. Nair
Summary: Intelligent transport of molecular species is crucial for biological functions, and is achieved through biological membranes. A phase-changing MoS2 membrane with memory effects and stimuli-regulated transport of molecules has been demonstrated in response to external pH. This phenomenon, unique to the 1T' phase of MoS2, has potential applications in autonomous wound infection monitoring and pH-dependent nanofiltration.
Article
Biotechnology & Applied Microbiology
Michael Paper, Max Koch, Patrick Jung, Michael Lakatos, Tom Nilges, Thomas B. Brueck
Summary: This study investigated the potential of 12 cyanobacterial strains for biosorption of rare earth elements, and Nostoc sp. 20.02 showed the highest adsorption capacity. Synechococcus elongatus UTEX 2973, Calothrix brevissima SAG 34.79, Desmonostoc muscorum 90.03, and Komarekiella sp. 89.12 were also promising strains. The adsorption of metals by the strains had fast kinetics and pH value had a significant impact on the process.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Engineering, Chemical
Xiaohua Cao, Jichang Lu, Yutong Zhao, Rui Tian, Wenjun Zhang, Dedong He, Yongming Luo
Summary: The praseodymium (Pr)-promoted MCM-41 catalyst showed good stability and activity in the decomposition of methyl mercaptan (CH3SH), with effectiveness up to 120 hours. NH3-TPD results indicated that strong acid sites were the main active centers. The possible reaction mechanism was revealed by analyzing the product distribution results.
Article
Biochemistry & Molecular Biology
Dafei Li, Yingni Wu, Haoran Yin, Wei Feng, Xiaoshuang Ma, Huining Xiao, Wenfeng Xin, Chengcheng Li
Summary: In this study, a polysaccharide from Panax Notoginseng (SPNP) was utilized as a Pickering stabilizer to create stable Pickering emulsions. The SPNP possessed a porous network structure with nanoparticles surrounding a rough surface. Through rheological measurements, it was determined that the Pickering emulsions formed gel-like structures. The emulsions displayed excellent stability in terms of storage, pH, ionic strength, temperature, and freeze-thaw cycles, making them applicable in various industries such as food, biomedical, and cosmetics.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Chemistry, Physical
Jiashuai Wang, Xiao Zhang, Zhe Li, Yanqing Ma, Lei Ma
JOURNAL OF POWER SOURCES
(2020)
Article
Energy & Fuels
Xue Yu, Chengwei Hu, Danni Hao, Gen Liu, Rui Xu, Xiaodong Zhu, Xi Yu, Yanqing Ma, Lei Ma
Summary: Polymeric carbon nitride (PCN) is a promising metal-free photocatalyst for solar-to-fuel conversion, but suffers from low light-harvesting efficiency and short electron-hole pair lifetimes. A 3D hierarchical network of carbon nitride tubes (NCNT) with intercrossing few-layer tubes of uniform diameter was synthesized, showing enhanced photocatalytic abilities compared to bulk PCN. The NCNT structure facilitates light reflection and decreases electron-hole recombination, leading to improved efficiency of hydrogen and hydrogen peroxide production under solar light.
Article
Chemistry, Physical
Gen Liu, Danni Hao, Kai Wang, Gang Dong, Xue Yu, Rui Xu, Mei Ji, Xiaodong Zhu, Yanqing Ma, Lei Ma
Summary: In this study, cetylpyridinium chloride was used as a model molecule to investigate the ring-opening process through in situ SERS technique. The results showed that the surface plasmonic resonance of Au nanoparticles promoted the reaction, suggesting potential applications of SERS in studying high-energy cost reactions in situ.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Gen Liu, Xue Yu, Rui Xu, Xiaodong Zhu, Yanqing Ma, Lei Ma
Summary: This study reveals the role of ammonium acetate in the growth mechanism of ZnO, leading to the production of hexagonal ZnO rods with higher photocurrent density. The research sheds light on the morphology regulation mechanisms of ZnO synthesis processes and opens the door for more practical applications.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Review
Electrochemistry
Shuo Wang, Xin Qi, Danni Hao, Ramiro Moro, Yanqing Ma, Lei Ma
Summary: Biosensors for quick diagnosis and in situ monitoring are increasingly important in healthcare. Field-effect transistor (FET) based biosensors using graphene as a channel material have received significant attention due to their high sensitivity and compatibility with point-of-care applications. However, challenges such as device stability and reproducibility still remain. This review discusses recent progress in the design strategy of high-performance graphene field-effect transistor (GFET) biosensors, emphasizing on device physics, defects, Debye screening, and functionalization, and provides insights into current applications and future development prospects.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Xiao Zhang, Zhe Li, Xun Tian, Yanqing Ma, Lei Ma
Summary: The highly ordered microporous activated carbon prepared using saussurea involucrata stalk as the carbon source exhibits excellent electrochemical performance in supercapacitors, with high specific surface area and good cyclic stability. Compared with other biomass materials, the saussurea stalk has a higher ion diffusion coefficient, indicating differences in ion transmission rates in different pore structures.
Article
Chemistry, Analytical
Gen Liu, Luzhen Hao, Hao Li, Kaimin Zhang, Xue Yu, Dong Li, Xiaodong Zhu, Danni Hao, Yanqing Ma, Lei Ma
Summary: This paper presents a high-resolution scanning electrochemical cell microscopy (SECCM) scheme that allows simultaneous observation of the topography and electrochemical activity of materials at the nanoscale. The use of homemade nanoprobes with an inner diameter of about 50 nm enables reliable measurements with a resolution of several tens of nanometers (≥65 nm). The scheme successfully records the topography and hydrogen evolution reaction (HER) activity of a self-assembled monolayer of gold nanoparticles with a diameter of about 45 nm. This approach has the potential to greatly expand the field of SECCM applications by routinely mapping the topographic and chemical properties of samples at the nanometer scale.
ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Xiao Zhang, Mei Zhao, Zejian Chen, Tong Yan, Jiangli Li, Yanqing Ma, Lei Ma
Summary: Four different types of carbon materials were synthesized from saussurea involucrata, cotton stalk, and cellulose using two activation methods. The saussurea involucrata-based flexible symmetric all-solid state supercapacitor exhibited high electrochemical performance, including high specific capacitance and excellent cycle stability. Moreover, it also showed excellent bending endurance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Review
Chemistry, Multidisciplinary
Jiaying Duan, Jiapeng Wang, Liangpeng Hou, Peixuan Ji, Wusheng Zhang, Jin Liu, Xiaodong Zhu, Zhixiang Sun, Yanqing Ma, Lei Ma
Summary: This article provides a comprehensive review of the research advancements in using scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) to measure the electronic orbits and energy levels of colloidal quantum dots in various systems. It introduces the basic principles of colloidal quantum dots synthesis and STM research methodology, explores the latest progress in STM application for colloidal quantum dot studies, and concludes with a summary and prospective.
Article
Chemistry, Physical
Xiaodong Zhu, Xue Yu, Jiangli Li, Hao Li, Shuai Wang, Yuchen Xu, Yanqing Ma, Lei Ma
Summary: Converting solar energy into hydrogen through photo-electrochemical cells is a promising strategy for clean energy. However, the flattening of the Schottky barrier at the interface between the p-type photo-absorber and metal co-catalyst hinders further improvement in the performance of the photocathode system. In this study, a simple approach using chemical vapor deposition (CVD) graphene as a buffer layer on p-type Si successfully reduces the interfacial barrier, leading to improved photo-electrochemical performance for hydrogen generation. The measured photocurrent density is 3.9 times higher compared to systems without the graphene buffer. This method provides a novel route to decrease the interfacial barrier and can be applied to other photocathode systems.
Article
Nanoscience & Nanotechnology
Mengying Li, Pinggen Zou, Zhi Chen, Ruotong Zhao, Cao Tang, Shuai Wang, Yanqing Ma, Lei Ma
Summary: The direct growth of graphene on an insulator is important for various applications, but synthesizing large area, homogeneous monolayer graphene with high quality remains a challenge. In this work, a full monolayer wafer-scale graphene film was successfully realized on a silicon/silicon oxide substrate. The synthesized graphene showed high quality and exhibited excellent properties.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Kaicheng Yu, Hao Tian, Rui Li, Luzhen Hao, Kaimin Zhang, Xiaodong Zhu, Yanqing Ma, Lei Ma
Summary: Graphene has excellent properties, but the contact resistance between metal electrodes and graphene in conventional devices is a challenge due to work function difference. This high contact resistance affects carrier mobility, device performance, and can cause overheating and aging. Therefore, finding optimal electrode materials and fabrication methods is crucial.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yanmei Ren, Rongke Sun, Xue Yu, Ruoxi Wang, Wusheng Zhang, Xiaodong Zhu, Yanqing Ma, Lei Ma
Summary: The study investigates the controlling parameters and their roles in the synthesis of tellurium nanowire bundles (Te-NBs). The growth mechanism of Te-NBs is revealed to be a transformation process from amorphous Te spheres to trigonal Te NBs. By adjusting the reaction temperature and initial solution pH, Te-NBs with different sizes and crystallinity can be synthesized, and high thermoelectric performance can be achieved with large width and high crystallinity.
MATERIALS ADVANCES
(2023)
Letter
Materials Science, Multidisciplinary
Shuai Wang, Mengying Li, Zhi Chen, Lirong Zhao, Mei Zhao, Yanqing Ma, Lei Ma
Summary: This study reports a method for directly synthesizing wafer-scale graphene on silicon dioxide surface. The use of photoresist and Cu/Ni thin-film coating-assisted chemical vapor deposition method allows for high-quality graphene growth. This method can be used for large-scale production of monolayer graphene without the need for conventional transfer procedures.
MRS COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Bowen Li, Yipeng Zhang, Jiashuai Wang, Zezhao Jia, Chengqian Shi, Yanqing Ma, Lei Ma
SN APPLIED SCIENCES
(2020)
