Article
Energy & Fuels
S. Swathi, R. Yuvakkumar, P. Senthil Kumar, G. Ravi, M. Thambidurai, Cuong Dang, Dhayalan Velauthapillai
Summary: Gadolinium-doped cerium oxide (CeO2) was successfully synthesized and characterized, showing excellent HER and OER activity compared to pristine CeO2. The incorporation of rare earth metal influenced the structural and catalytic properties of CeO2, making it a promising candidate for energy conversion applications.
Article
Polymer Science
Danil D. Kolmanovich, Nikita N. Chukavin, Irina V. Savintseva, Elena A. Mysina, Nelli R. Popova, Alexander E. Baranchikov, Madina M. Sozarukova, Vladimir K. Ivanov, Anton L. Popov
Summary: Layer-by-layer self-assembled polyelectrolyte capsules have great potential in drug delivery and imaging contrast agent applications. This study presents the design of MRI-visible capsules loaded with gadolinium-doped cerium oxide nanoparticles, which showed high biocompatibility and cellular uptake efficiency in cancer cells and normal cells.
Article
Chemistry, Physical
N. Intachai, N. Wantana, S. Kaewjaeng, S. Kothan, P. Kidkhunthod, N. Chanlek, H. J. Kim, P. Kantuptim, T. Yanagida, R. Rajaramakrishna, J. Kaewkhao
Summary: This study investigated the effect of Gd2O3 on cerium oxidation state and luminescence in silicoborate glass. The addition of Gd2O3 increased density and refractive index, while decreasing molar volume. XPS spectra confirmed the glass structure and showed more BO4 and bridging oxygen. XANES analysis revealed a decrease in the Ce3+/Ce4+ ratio with increasing Gd2O3 content. Higher Gd2O3 concentration resulted in more Ce4+, leading to reduced luminescence spectra.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Materials Science, Ceramics
I. A. Anokhina, I. E. Animitsa, V. Voronin, V. B. Vykhodets, T. E. Kurennykh, N. G. Molchanova, A. Vylkov, A. E. Dedyukhin, Y. P. Zaikov
Summary: Two lithium-doped phases were prepared using the Pechini method, showing that heat treatment above 1200 degrees C leads to a significant loss of lithium. Microwave sintering at lower temperatures can result in ceramics with stoichiometric lithium content. The introduction of lithium in the Gd-sublattice decreases the unit cell parameter, while doping at the Zr-sites increases it, leading to an increase in free cell volume. The conductivity of the samples can be enhanced by Li+-doping at the Gd3+-site, with one sample showing lower conductivity potentially due to trapping of oxygen vacancies. Conductivity measurements indicated the Li-containing phase acts as a pure oxide conduction at temperatures below 800 degrees C.
CERAMICS INTERNATIONAL
(2021)
Article
Biotechnology & Applied Microbiology
Vu Nang An, Le Pham Nam Phong, Nguyen Van Nhi, Tran Thi Thanh Van, Ha Thuc Chi Nhan, Le Van Hieu
Summary: The study fabricated a polymeric material consisting of cellulose nanocrystals and imidazole, and proposed a new approach to fabricate composite materials by mixing the hybrid into a Nafion matrix. The results showed improved proton conductivity and potential for eco-friendly fuel cell operation in low humidity conditions.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Yu A. Kuznetsova, D. A. Zatsepin, A. F. Zatsepin, N. Gavrilov
Summary: Thin nanocrystalline films of gadolinium oxide (undoped and doped with copper ions) were synthesized and characterized by XPS, XRD, and various spectroscopic techniques. It was observed that the injection of copper ions led to a slight decrease in the transparency gaps of direct and indirect transitions in Gd(2)O3 films, accompanied by a decrease in refractive index and an increase in dispersion. Excited states associated with oxygen vacancies were found to contribute to the luminescence yield, which was enhanced by the presence of copper ions. The energy transfer between intrinsic defects in the Gd2O3 film enabled the conversion of hard UV radiation into soft UV and visible radiation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Hye-Won Kim, Jun Seo, Ji Haeng Yu, Kyong Sik Yun, Jong Hoon Joo, Jooho Moon, Hee Jung Park
Summary: The study found that barium zirconate with higher Ce substitution exhibits better conductivity in both grain and grain boundary, while low-Ce substituted samples are significantly affected by space charge in grain boundary transport. The highest conductivity was observed in the barium zirconate sample with the highest Ce substitution, showing its potential application as a solid electrolyte in electrochemical devices like solid oxide fuel cells.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Vu Dong Thuc, Vo Dinh Cong Tinh, Dukjoon Kim
Summary: Lab-synthesized ceria nanoparticles were surface-modified for proton conductivity, and embedded into Nafion membranes to enhance chemical stability and proton conductivity. The sandwiched structure membrane showed significantly improved durability and cell performance, with a maximum power density of 522 mW cm(-2), surpassing that of pristine and single-layer composite membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Physics, Multidisciplinary
Muhammad Ehsan Mazhar, Muhammad Bilal, Abdul Waheed, Javed Ahmad, Imran Khan, Waseem Abbas, Naeem Akhtar, Asim Javed, Muhammad Nauman Usmani, Hassan Mahmood, Arfa Riaz, Mehek Bukhari
Summary: The synthesized nanocrystalline lanthanum molybdenum oxide powders with varying Fe3+ concentrations exhibited increasing DC electrical conductivity and decreasing dielectric loss, making them potential candidates for applications in super capacitors. The study also analyzed the structure, morphology, and chemical composition of the powders using XRD, SEM, and EDS.
Article
Chemistry, Physical
Roberto D'Amato, Anna Donnadio, Chiara Battocchio, Paola Sassi, Monica Pica, Alessandra Carbone, Irene Gatto, Mario Casciola
Summary: CeO2 nanoparticles were coated with polydopamine (PDA) through dopamine polymerization in water dispersions. The resulting materials were used as fillers in proton exchange membranes to reduce chemical degradation, and showed improved conductivity and radical scavenger efficiency compared to bare CeO2. Emission rate data from composite membrane degradation correlated with changes in membrane mass and conductivity.
Article
Chemistry, Multidisciplinary
Yan Wang, Peng Sun, Zhongfang Li, Hui Guo, Hongchang Pei, Xiaoyan Yin
Summary: A series of composite membranes based on crosslinked mPBI with cerium 2,4,6-triphosphono-1,3,5-triazine (CeTPT) were successfully fabricated, showing good proton conductivity and thermal stability. The addition of new high-temperature proton conductor CeTPT, along with tetrafunctional crosslinker TGDDM, efficiently improved the mechanical properties, dimensional stability, and oxidative resistance of the membranes. These membranes exhibited high proton conductivity and good methanol resistance, making them suitable for direct methanol fuel cells.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Materials Science, Ceramics
A. S. Lesnichyova, S. A. Belyakov, A. Yu Stroeva, A. V. Kuzmin
Summary: Through a series of experiments, it was found that La0.9Sr0.1ScO3-delta exhibits the highest proton conductivity at 800 degrees Celsius, making it suitable for various electrochemical devices. The study results indicate that an increase in Sr dopant concentration will increase the partial conductivity of each charge carrier.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Hosam M. Gomaa, H. A. Saudi, I. S. Yahia, H. Y. Zahran
Summary: A new approach has been developed in this study to investigate the correlation between the optical and electrical conductivities of cerium sodium borate glasses. The amorphous nature of the samples was proven through X-ray diffraction analysis. The optical conductivity and dielectric parameters were fitted using Lorentz-Drude and Cole-Cole models, respectively. The study also analyzed the changes in different parameters with varying CeO2 content.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
J. G. R. Hernandez-Arteaga, H. Moreno-Garcia, A. G. Rodriguez
Summary: CeO2 thin films doped with Gd showed variations in lattice parameters and electron concentration with different Gd concentrations. Raman spectroscopy revealed phonon shifts related to changes in atomic bonding length and the presence of oxygen vacancies. Two p-n junctions were formed with CeO2:Gd layer, confirming the doping of CeO2 with Gd.
Article
Chemistry, Multidisciplinary
Jakub Ederer, Adam Novak, Pavel Janos, Martin Stastny, Jiri Henych, Matous Barta, Petr Rysanek, Jakub Tolasz
Summary: Nanocrystalline cerium oxide was investigated for the safe removal of phosphorus compounds, and its sorption ability and catalytic activity were found to be closely related to its physical and chemical characteristics. By controlling these characteristics within a specific temperature range, the degradation of organophosphate compounds can be achieved.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)