Article
Chemistry, Applied
R. Obeso-Estrella, B. Pawelec, N. Mota, L. Flores, J. M. Q. Melgoza, R. I. Yocupicio-Gaxiola, T. A. Zepeda
Summary: Mesoporous Al2O3-TiOx composites with different titania loadings were synthesized to evaluate the effect of non-stoichiometric TiOx phases on the hydrodesulfurization ability of CoMo/Al2O3-TiOx catalysts. The results showed that all sulfided CoMo Al2O3-TiOx catalysts were more active than CoMo/Al2O3 catalyst. The DBT HDS reaction mainly occurred through the direct desulfurization pathway.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Polymer Science
Mark J. Moran, Olena Ouskova, Katherine M. Gerosa, Anna Tabirian, Nelson Tabiryan, Nicholas P. Godman, Michael E. McConney, Jonathan Slagle, Timothy J. Bunning
Summary: The directed self-assembly of liquid crystal polymers has superior optical properties compared to conventional isotropic optical materials. However, the exploration of reflective liquid crystalline polymeric films has been limited due to production challenges. In this study, we investigate stacked polymer cholesteric liquid crystal thin films as a means to generate reflective diffractive optics for circularly polarized light. We present three different exemplar cases to demonstrate the potential of these unique thin polymer films.
Article
Chemistry, Physical
Harpreet Singh Gujral, Gurwinder Singh, Jae Hun Yang, C. I. Sathish, Jiabao Yi, Ajay Karakoti, Mohammed Fawaz, Kavitha Ramadass, Ala'a H. Al-Muhtaseb, Xiaojiang Yu, Mark B. H. Breese, Ajayan Vinu
Summary: Transition metal nitrides have attracted much attention due to their unique structure and electrical properties, and they have great potential for electrocatalytic applications. This study successfully synthesized highly crystalline and mesoporous titanium carbonitride (MTiCN) materials using a combination of reactive templating approach and doping. The optimized MTiCN material exhibited considerable electrocatalytic hydrogen evolution reaction (HER) activity, which is close to the performance of commercial platinum/carbon catalysts. This work provides a simple solution for the rational design of porous transition metal carbon nitrides with excellent electrocatalytic properties.
Review
Chemistry, Multidisciplinary
Kun Lan, Qiulong Wei, Dongyuan Zhao
Summary: This Review discusses the synthesis of novel mesoporous TiO2 materials, with a focus on the monomicelle assembly strategy for controlling the formation of mesostructured TiO2. Typical applications of mesoporous TiO2 in batteries and photocatalysis are highlighted, and the outlook for the synthesis of mesoporous TiO2 with tailored architectures through self-assembly is discussed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Tingyi Huang, Jiayu Yu, Xiaojuan Huang, Junbin Li, Binhao Wang, Yalin He, Dafu Tang, Jinyu Zhang, Dong-Liang Peng, Kun Lan, Qiulong Wei
Summary: The synthesis of 2D mesoporous TiN with high surface area and rich mesoporosities is presented. The sodium-ion storage mechanism of TiN anode is based on the existence of surficial titanium oxides. The hybrid sodium-ion capacitor consisting of 2D-meso-TiN anode and Na3V2(PO4)(3) cathode exhibits high energy density, high power density, and long cycling stability.
Article
Chemistry, Physical
Dingyi Guo, Yubin Fu, Fanxing Bu, Haichen Liang, Linlin Duan, Zaiwang Zhao, Changyao Wang, Ahmed Mohamed El-Toni, Wei Li, Dongyuan Zhao
Summary: An aqueous emulsion polymerization self-assembly approach was used to synthesize ultrahigh nitrogen-containing mesoporous polymer nanospheres for the first time. These nanospheres, with a unique triazine structure, showed excellent performance as an anode in sodium-ion batteries.
Article
Chemistry, Multidisciplinary
Haichen Liang, Liangliang Liu, Nan Wang, Wei Zhang, Chin-Te Hung, Xingmiao Zhang, Zhenghao Zhang, Linlin Duan, Dongliang Chao, Fei Wang, Yongyao Xia, Wei Li, Dongyuan Zhao
Summary: This study proposes a confined acid-base pair self-assembly strategy to synthesize Ti0.88Nb0.88O4-x@C for high-performance Sodium-ion batteries (SIBs) operating at room and low temperatures. The confined self-assembly of the acid-base pair and confined crystallization by the carbon layer enable the formation of ordered and stoichiometric mesoporous frameworks with opened ion channels, demonstrating rapid Na+ diffusion kinetics at 25 and -40 degrees C. The mesoporous Ti0.88Nb0.88O4-x@C exhibits high reversible capacity, excellent rate capability, and cycling stability, making it a promising material for low-temperature energy storage.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Roman A. Khalaniya, Valeriy Yu Verchenko, Alexey Sobolev, Igor A. Presniakov, Zheng Wei, Evgeny Dikarev, Andrei Shevelkov
Summary: Fe6Ge5 exhibits a peculiar two-step antiferromagnetic ordering, with a fraction of iron magnetic moments remaining disordered between the transitions. This behavior arises from the competition between ferromagnetic and antiferromagnetic interactions due to the weakly connected iron framework formed by a large number of both symmetrically and locally distinct iron atoms.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Zhen Chen, Yukinaga Suzuki, Ayumi Imayoshi, Xiaofan Ji, Kotagiri Venkata Rao, Yuki Omata, Daigo Miyajima, Emiko Sato, Atsuko Nihonyanagi, Takuzo Aida
Summary: The study describes the solvent-free autocatalytic supramolecular polymerization for the conversion of phthalonitrile derivatives into phthalocyanines with high yields. This unique approach takes advantage of the termination-free nucleation-elongation assembly of the product (template) under solvent-free conditions.
Article
Materials Science, Multidisciplinary
Marjoni Imamora Ali Umar, Dahyunir Dahlan, Muhammad Nurdin, Munetaka Oyama, Akrajas Ali Umar
Summary: The study demonstrated that adding PVP surfactant under alkaline conditions can modify the crystal growth preference in the c-axis direction of zinc oxide nanostructures, resulting in a two-dimensional nanostructure. The dimensions of the nanosheets depend on the concentration of NaOH, making them suitable as active materials in optoelectronic devices.
Article
Chemistry, Physical
Xuan Li, Wenjun Yan, Binbin Fan, Zhongde Wang
Summary: A nanocomposite of Co9S8-Ni9S8 nanodiscs (CNS) grown from polypyrrole hollow nanospheres (PHS) on carbon paper (CP) via unipolar pulse electrodeposition (UPED) technique was designed as a hydrogen evolution reaction (HER) catalyst. The optimized CNS/PHS/CP electrode exhibited favorable catalytic activity with low overpotential, superior stability performance, and high electrochemically active surface area. This work provides new insights for the design of low-cost bimetallic sulfide-based electrocatalysts for high-performance HER in water splitting.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Colin H. Peterson, Jay R. Werber, Hyung Kae Lee, Marc A. Hillmyer
Summary: We successfully prepared mesoporous polymer microspheres with uniform pore size using aqueous suspension polymerization. The size and pore size of the microspheres can be independently controlled, and they exhibit a nanostructured bicontinuous morphology. We also demonstrated the incorporation of functional pore walls and showed the high efficiency of the microspheres in dye removal. This method has great potential for applications in catalysis, chromatography, and water remediation.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Khushboo Kumari, Sandeep Vura, Srinivasan Raghavan, Sushobhan Avasthi
Summary: The pulsed Nd:YAG laser was used to crystallize amorphous germanium thin-films, resulting in epitaxial Ge, with film thickness and laser fluence playing a crucial role. The epitaxial Ge preparation method is fast, cost-effective, and has a low thermal budget, making it suitable for large area applications.
Article
Environmental Sciences
Suna Balci, Fatma Tomul
Summary: The catalytic performances of Silica Pillared Clay (SPC) supports synthesized with different amounts of silica were evaluated in Catalytic Wet Peroxide Oxidation (CWPO) of phenol. The type of clay mineral and the loading of iron or titanium significantly affected the catalytic performance. Fe-loaded SPCs showed better CWPO performance than Ti-loaded ones. The amount of catalyst and the temperature increase promoted the conversion of phenol. The catalysts were more effective under lower pH conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
M. S. Lomakin, O. V. Proskurina, A. A. Sergeev, I. V. Buryanenko, V. G. Semenov, S. S. Voznesenskiy, V. V. Gusarov
Summary: This study investigated the influence of hydrothermal synthesis conditions on nanocrystalline particles with a phase of variable composition. The BFWO phase structural parameters were found to be affected by the chemical composition, while the average crystallite size and aggregate size changed with different hydrothermal synthesis conditions. Furthermore, the Eg value was shown to decrease with an enrichment of BFWO composition in Bi and Fe, and a decrease in the volume fraction of crystallites in the surface layer of aggregates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Svetlana M. M. Posokhova, Vladimir A. A. Morozov, Dina V. V. Deyneko, Boris S. S. Redkin, Dmitry A. A. Spassky, Vitali Nagirnyi, Alexei A. A. Belik, Joke Hadermann, Erzhena T. T. Pavlova, Bogdan I. I. Lazoryak
Summary: The influence of preparation techniques on the structure and luminescent properties of K5Eu(MoO4)(4) (KEMO) was studied. The different synthesis techniques resulted in variations in the crystal structure of KEMO, with the CZ technique producing a (3 + 1)D incommensurately modulated structure. The crystal grown by the CZ technique also exhibited the highest luminescent intensity and a high quantum yield of 66.5%.
Article
Chemistry, Physical
Alexei A. Belik, Ran Liu, Kazunari Yamaura
Summary: Sm2MnZnMn4-xTixO12 perovskites with different Mn contents were synthesized, and it was found that Zn doping significantly modified the magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Jianping Chen, Bin Liu, Hang Cai, Shude Liu, Yusuke Yamauchi, Seong Chan Jun
Summary: This study develops a covalently interlayer-confined organic-inorganic hybrid for improving the reaction kinetics of supercapacitors. The covalent assembly facilitates cross-layer electron transfer, increases active sites, and enhances the specific capacitance and rate capability of the hybrid material.
Article
Chemistry, Physical
Lulu Jia, Fang Xian, Yoshiyuki Sugahara, Nobuyuki Sakai, Emmanuel Picheau, Hairong Xue, Yusuke Yamauchi, Takayoshi Sasaki, Renzhi Ma
Summary: Ultrathin nanosheets of Ni-, Co-, and Fe-based (oxy)hydroxides show promising catalytic activity for OER in water electrolysis under alkaline conditions. Fe may play a crucial role in the catalytic process of Ni- or Co-based catalysts, but effective methods for preparing and studying pure Fe hydroxide nanosheets are lacking.
CHEMISTRY OF MATERIALS
(2023)
Review
Chemistry, Physical
Lijin Huang, Juan Yang, Yingji Zhao, Hirokatsu Miyata, Minsu Han, Qin Shuai, Yusuke Yamauchi
Summary: To address the insolubility and poor processability of powder covalent organic frameworks (COFs), monolithic COFs with hierarchical structures have been constructed as a feasible and effective solution. This review provides a comprehensive summary of the recent advances in the synthesis of monolithic COF materials and their application in environmental remediation, as well as discussing current challenges and future perspectives.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaohong Liu, Xingtao Xu, Xiaoxu Xuan, Wei Xia, Guilin Feng, Shuaihua Zhang, Zhen-Guo Wu, Benhe Zhong, Xiaodong Guo, Keyu Xie, Yusuke Yamauchi
Summary: In this study, a yolk-shell nanoarchitecture of NASICON-structured NTP/C materials (ys-NTP@C) was developed using a metal-organic framework@ covalent organic polymer (MOF@COP) as a sacrificial template and space-confined nanoreactor. ys-NTP@C exhibited good CDI performance with high salt adsorption capacities (SACs) and good cycling stability. This study provides a new synthetic paradigm for preparing yolk-shell structured materials and highlights the potential use of yolk-shell nanoarchitectures for electrochemical desalination.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Jieyuan Song, Cong He, Thomas Scheike, Zhenchao Wen, Hiroaki Sukegawa, Tadakatsu Ohkubo, Yukio Nozaki, Seiji Mitani
Summary: In this work, fully epitaxial Ru/Cu heterostructures were fabricated with interface engineering and nanolayer insertions. The atomically controlled interface was confirmed by high-resolution scanning transmission electron microscopy, and the spin current generation and efficiency were evaluated. The results show that the insertion of Cu/Ru nanolayers improves the spin Hall efficiency, and a large effective spin Hall conductivity is achieved in the epitaxial Ru/Cu hybrid nanolayers.
Article
Materials Science, Composites
Xianyan Ren, Xinyuan Wang, Xin Yang, Ming Hu, Hai Hang Xie, Chao Wang
Summary: Zero-dimensional nitrogen-doped carbon dots (N-CDs) were used as a hard template in the polymerization system to synthesize small-sized, monodisperse, and highly conductive N-CDs/PANI nanocomposites. These nanocomposites were then added to acrylic resin, resulting in coatings with excellent corrosion resistance and antifouling performances. Compared to PANI, the N-CDs/PANI showed significantly improved anticorrosion and antifouling properties. The N-CDs/PANI-AC coating exhibited better adhesion and higher protection efficiency, with a 5 times increase in the protection efficiency of the AC resin coating.
POLYMER COMPOSITES
(2023)
Article
Engineering, Chemical
Zeqiu Chen, Xingtao Xu, Kai Wang, Dong Jiang, Fanyue Meng, Ting Lu, Yusuke Yamauchi, Likun Pan
Summary: In this study, a hybrid material of pyrazine-based pi-conjugated organic molecule, hexaazatrinaphthalene (HATN), and MXene was reported. The combination of MXene as a conductive substrate and HATN as an electroactive material resulted in a unique 3D structure with increased ion transport channels, leading to enhanced charge transfer and ion diffusion rates. The obtained HATN/MXene composite exhibited a high desalination capacity of 57.5 mg g(-1), a fast desalination rate of 13.2 mg g(-1) min(-1), and good long-term stability. This work provides valuable insights for the design and application of organic molecules in the field of capacitive deionization.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Alexei A. Belik, Ran Liu, Andreas Donni, Masahiko Tanaka, Kazunari Yamaura
Summary: In this work, perovskite solid solutions (Lu0.5Mn0.5)(Mn1-xTix)O-3 were synthesized and their crystal structure was determined by Rietveld analysis of X-ray powder diffraction data. It was found that the x=0.25 and 0.50 samples exhibit long-range ferrimagnetic order below their respective transition temperatures Tc=89K and 36K, despite the presence of non-magnetic Ti4+ ions diluting the A and B sublattices. The x=0.75 sample shows a spin-glass transition at Ts=6K. Temperature-independent dielectric constants were observed for the x=0.50 and x=0.75 samples.
Article
Chemistry, Physical
Elena V. V. Sipina, Dmitry A. A. Spassky, Nataliya R. R. Krutyak, Vladimir A. A. Morozov, Evgenia S. S. Zhukovskaya, Alexei A. A. Belik, Mikhail S. S. Manylov, Bogdan I. I. Lazoryak, Dina V. V. Deyneko
Summary: beta-Ca-3(PO4)(2)-type phosphors Ca9-xMnxEu(PO4)(7) were synthesized and characterized. The abnormal reduction of Eu3+ to Eu2+ in air was observed and confirmed by PL spectra study and XPS. The redistribution of Eu2+/Eu3+ ions among crystal sites and the abnormal quenching of Eu3+ emission were discussed in detail.
Article
Chemistry, Multidisciplinary
Lingling Xia, Yucen Li, Jiwei Cui, Ming Hu
Summary: Hollow ZIF-8 particles with improved mechanical and chemical stability were synthesized by embedding polyphenol and polyethylene glycol networks. These particles demonstrated high adsorption capacity and efficient degradation of organic dyes under irradiation.
Article
Chemistry, Multidisciplinary
Mandeep K. Chahal, Masato Sumita, Jan Labuta, Daniel T. Payne, Jonathan P. Hill, Yusuke Yamauchi, Takashi Nakanishi, Takeshi Tanaka, Hiromichi Kataura, Kenji Koga, Hiroyuki Miyamura, Yoshihiro Kon, Dachao Hong, Shinsuke Ishihara
Summary: This study reports a chemiresistive sensor array composed of modified hydroxylamine salts and single-walled carbon nanotubes that can selectively detect formaldehyde vapor. By screening different types of salts, an ideal sensor array has been identified that can clearly discriminate trace amounts of formaldehyde from acetaldehyde. This system offers portable and reliable chemical sensors for advanced environmental monitoring and healthcare applications.
Article
Chemistry, Physical
Yuan Tian, Zhiliang Gao, Mengqi Li, Ming Hu, Jingcheng Hao, Jiwei Cui
Summary: We have developed a versatile method for engineering functional polymer nanoparticles (NPs) with tunable sizes, stiffness, and responsiveness using zeolitic imidazolate framework-8 (ZIF-8) NPs as templates. This method allows for the incorporation of various components, including synthetic polymers and biomacromolecules, into ZIF-8 NPs, which are then cross-linked during template removal using different strategies. The reported method offers simple assembly, versatility in polymer components, and excellent control over physicochemical properties of the polymer NPs. The combination of versatile assembly and tunable functions makes these polymer NPs promising for therapeutic delivery.
CHEMISTRY OF MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Mohamed Barakat Zakaria Hegazy, Fathy Hassan, Ming Hu
Summary: Hofmann-type CN-CPs have the potential to produce functional nanomaterials with nanoscale structures and various functionalities through thermal decomposition and hybridization with other substances. This article reviews the recent developments in this field, including synthesis techniques, properties of nanomaterials, and their potential applications in electrical and energy fields.
