Article
Chemistry, Multidisciplinary
Jeehae Shin, Wonhee Jo, Jae Hyuk Hwang, Jiseok Han, Woohwa Lee, Sungmin Park, Yong Seok Kim, Hee-Tak Kim, Dong-Gyun Kim
Summary: This study presents regionally controlled multistimuli-responsive structural color switching surfaces using micropatterned DNA-hydrogel assembly. The approach allows for programmable swelling and deswelling of the DNA-hydrogel in response to multiple stimuli, overcoming existing limitations and providing reversible transitions.
Article
Agricultural Engineering
Lin Dai, Wenfei Jiang, Runqian Jia, Xin Zhou, Yong Xu
Summary: This study developed an acetic acid-mediated bio-oxidation strategy with Gluconobacter oxydans to produce valuable 2-ketogluconic acid from lignocellulosic biomass. Acetic acid was found to have a down-regulated effect on biooxidizing glucose to gluconic acid while significantly facilitating 2-ketogluconic acid accumulation and improving gluconate dehydrogenase activity. These findings provide a theoretical foundation for the industrial production of 2-ketogluconic acid using lignocellulosic materials.
BIORESOURCE TECHNOLOGY
(2022)
Review
Nanoscience & Nanotechnology
Danyan Wang, Zeyang Liu, Haozhu Wang, Moxin Li, L. Jay Guo, Cheng Zhang
Summary: Recent years have seen rapid development in the field of structural coloration, which is generated from the interaction of nanostructures with light. Compared to traditional color generation methods, structural coloration offers unique advantages in terms of spatial resolution, operational stability, environmental friendliness, and multiple functionality. This review discusses the recent developments in structural coloration based on layered thin films and optical metasurfaces. It covers the fundamentals of color science, physical mechanisms for structural color generation, optimization methods for efficient structure parameter searching, fabrication techniques for large-scale and low-cost manufacturing, device designs for dynamic displaying, and diverse applications in printing, sensing, and advanced photovoltaics.
Review
Chemistry, Multidisciplinary
Youfeng Yue, Jian Ping Gong
Summary: This article provides an overview of unique anisotropic hydrogels with uniaxially aligned lamellar bilayers embedded in an amorphous gel matrix, showcasing their various unique functions such as structural colors, one-dimensional swelling and diffusion, and high mechanical strength and toughness during deformation. The study demonstrates the significant potential of hydrogel materials fabricated by introducing anisotropic ordered structures.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Chemistry, Analytical
Guodong Wei, Ying Tian, Shun'ichi Kaneko, Zhengang Jiang
Summary: This paper presents a method called multiple-layered absent color indexing (ABC-ML) for template matching, which combines absent color indexing and multiple-layered structure to solve the precision problem. Experiments on real-world images and open data show that this method has produced state-of-the-art results and retained the histogram merits of robustness.
Article
Environmental Sciences
Wahyu Kamal Setiawan, Kung-Yuh Chiang
Summary: The study found that gluconic acid (GA) is more effective than citric acid (CA) in preparing biogenic silica (BSi) from rice husk, with higher BSi recovery efficiency and better environmental friendliness. GA leaching can efficiently recover BSi and effectively remove main metal alkali impurities from rice husk, showing potential significance for enhancing the sustainability of BSi.
Article
Chemistry, Physical
Lang Qiu, Yang Song, Mengke Zhang, Yihua Liu, Zhiwei Yang, Zhenguo Wu, Heng Zhang, Wei Xiang, Yuxia Liu, Gongke Wang, Yan Sun, Jun Zhang, Bin Zhang, Xiaodong Guo
Summary: This study systematically investigates the structure reconstruction induced by the migration of Li, O, and transition metal (TM) ions during high-temperature lithiation, charging, and long-term storage. By characterizing Li-free/Li-containing phases and conducting detailed analyses, the structural reconstruction induced by the interaction of Li, O, and TM ions is revealed.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yuze Zhang, Lijuan Li, Dong Shi, Fugen Song
Summary: The study reveals that using layered double hydroxides intercalated by gluconic acid anion as flame retardants can significantly improve the fire performance of epoxy resin and slightly enhance the hardness and toughness of the materials. This flame retardant has good environmental compatibility and low cost, making it promising for wide applications in various polymers.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Chemical
Zehai Xu, Yufan Zhang, Yanjun Xu, Qin Meng, Chong Shen, Lusheng Xu, Guoliang Zhang
Summary: In this study, activated graphene oxide lamellar nanofilms fixed by functionalized heterostructured MEA-C3N4 nanosheets were successfully synthesized. The nanofilms exhibited a unique circuit board-like structure and highly interconnected microporosity, which greatly enhanced stability and suppressed swelling. The nanofilms showed ultrahigh rejection towards low molecular weight organic matters and high water permeance with competitive rejection for Na2SO4.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Chemistry, Physical
Julio Viana Machado, Maria Luiza Andrade da Silva, Caio Luis Santos Silva, Maria Carolina Granja Correia, Alisson Dias da Silva Ruy, Luiz Antonio Magalhaes Pontes
Summary: This study demonstrates that gold catalysts can efficiently produce gluconic acid, while platinum catalysts effectively generate glucaric acid. The article proposes using two reactors in series to enhance yield and efficiency.
CATALYSIS COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
J. X. Wei, Y. Yin, J. L. Yan
Summary: GdxSr2-xCoO4 layered perovskites with varying gadolinium content were synthesized using solid-state reaction method, showing single phase tetragonal structure with lattice parameters and Co-O bond length decreasing as Gd3+ content increases. XPS analysis revealed mixed valence states of Co3+ and Co4+ on the surface, as well as oxygen vacancies. Investigation on thermoelectric properties showed that with increasing Gd3+ content, electrical conductivity and thermal conductivity decreased while Seebeck coefficient increased, leading to an enhancement in the figure of merit.
CERAMICS INTERNATIONAL
(2021)
Article
Food Science & Technology
Rafael Mangas, Pedro Martin, Maria Rosa Gonzalez, Jose Manuel Rodriguez-Nogales
Summary: Climate change affects the composition of grapes, resulting in unbalanced wines with high alcohol content, low acidity, and poor aromatic notes. In this study, enzymes were used to reduce glucose concentration and pH in high-sugar white must. The enzymatic treatment resulted in more balanced wines with decreased alcohol content and pH, while maintaining their chromatic characteristics.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
T. Maluangnont, W. Vittayakorn
Summary: In this work, the layered structure of lepidocrocite-type alkali titanates was modified by vibratory milling technique. Cs2Ti6O13 and Cs0.7Zn0.35Ti1.65O4 maintained single-phase while K0.8Zn0.4Ti1.6O4 showed a mixture of expanded- and original phase after milling, indicating different interlayer spacing changes in relation to the type of interlayer ions and alkali-to-titanium ratio.
INTEGRATED FERROELECTRICS
(2021)
Review
Chemistry, Physical
Esperanza Pavon, Maria D. Alba
Summary: Swelling layered clay minerals, characterized by their ability to expand or contract in the presence or absence of water, have a wide range of applications. Solid State Nuclear Magnetic Resonance (SS-NMR) plays a crucial role in the characterization of these materials, providing valuable information on their dynamics and structure that is inaccessible using other methods.
PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY
(2021)
Article
Chemistry, Applied
Motaz Khawaji, Ines Graca, Ecaterina Ware, David Chadwick
Summary: AuxPdy nanoparticles prepared by colloidal synthesis and immobilised on ceria nanorods exhibit excellent catalytic performance in the selective oxidation of glucose, with activity strongly dependent on bimetallic composition. The catalyst shows good recyclability and high selectivity, with defects on the ceria nanorods surface serving as anchoring sites for the nanoparticles.
Article
Chemistry, Applied
Kyoko Nakamura, Nobuyuki Ichikuni, Takayoshi Hara, Takashi Kojima, Shogo Shimazu
Article
Materials Science, Ceramics
Naofumi Uekawa, Kosuke Yoshida, Minoru Kobayashi, Takashi Kojima
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Takeshi Iwasaki, Shotaro Harada, Taku Okoshi, Miyu Moriya, Takashi Kojima, Keiki Kishikawa, Michinari Kohri
Article
Energy & Fuels
Kazuki Urushidate, Keisuke Hara, Mao Yoshiba, Takashi Kojima, Takaomi Itoi, Yasuo Izumi
Article
Chemistry, Multidisciplinary
Michinari Kohri, Akari Kobayashi, Taku Okoshi, Hiroki Shirasawa, Keita Hirai, Kazuya Ujiie, Takashi Kojima, Keiki Kishikawa
Summary: An inverse opal structure was created using artificial melanin particles composed of a polystyrene core and a polydopamine shell as the template. The melanin-mimicking polydopamine inside the structure effectively absorbed multiple scattered light, producing bright structural color that could be reversibly changed by solvent penetration.
Article
Chemistry, Physical
Yoshitaka Matsumura, Takashi Kojima, Yasuhiro Yamada, Satoshi Sato
Summary: Calcia-stabilized zirconia (CSZ) prepared under hydrothermal conditions with ammonia aqueous media showed high crystallinity and specific surface area, resulting in high catalytic performance in the vapor-phase dehydration of 1,4-butanediol. However, not all calcium in the solution was included in ZrO2 precipitates in the ammonia media.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Enggah Kurniawan, Takayoshi Hara, Yessi Permana, Takashi Kojima, Nobuyuki Ichikuni, Shogo Shimazu
Summary: Highly reducible CuO species were created by calcination of Cu-Al layered double hydroxide (CuAl LDH) at high temperatures, which showed excellent catalytic performance in the hydrogenation of furfural. The CuO species in the calcined CuAl LDH matrix transformed into active Cu-0 species and the spent catalyst could be reused without loss of its catalytic activity.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Yuta Fujita, Kotona Kohaku, Nao Komiyama, Kazuya Ujiie, Hyuma Masu, Takashi Kojima, Hiroki Wadati, Hirofumi Kanoh, Keiki Kishikawa, Michinari Kohri
Summary: We have successfully created a colorless metal-organic framework (MOF) particle composed of the lanthanide element holmium. This particle exhibits excellent magnetic properties and allows for selective adsorption of dyes through magnetic separation. Furthermore, similar methods can be employed to develop colorless multifunctional MOF particles using other lanthanide elements.
Article
Materials Science, Multidisciplinary
Takashi Kojima, Tomoya Yoshida, Shunsuke Kobayashi, Akiko Takeda, Ikutomo Takahashi, Kazuya Ujiie, Naofumi Uekawa
Summary: Tantalum oxide (Ta2O5) particles with defined structures and high specific surface areas were prepared by hydrolyzing tantalum alkoxide and partially dissolving the particle surfaces. Different treatments resulted in different structures, including retention of the porous structure and the growth of spines on the original spherical core.
Article
Materials Science, Ceramics
Yuma Sasamura, Takashi Kojima, Naofumi Uekawa
Summary: In this study, a stable sol of alpha-Ni(OH)2 nanoparticles was successfully prepared by adding sorbitol. The resulting sol can be used to prepare thin films with reversible electrochromic characteristics.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Rena Isowaki, Takashi Kojima, Zhiyao Zhu, Fumiyuki Shiba, Naofumi Uekawa
Summary: In this study, micron-sized porous titania particles with high specific surface area and sufficient photocatalytic activity were prepared through hydrothermal treatment. The photocatalytic activity of these particles was comparable to that of titania nanoparticles. The mesoporous structure of the particles, especially from Wet particles, could be controlled by adjusting the treatment temperature. The porous titania particles prepared from Wet particles showed better photo-degradation activity.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2023)
Article
Materials Science, Ceramics
Takashi Kojima, Tsukasa Baba, Kohei Inamoto, Rena Isowaki, Chieko Yukita, Kazuya Ujiie, Akiko Takeda, Fumiyuki Shiba, Naofumi Uekawa
Summary: Uniform-sized amorphous hydrous titania particles (HTPs) were treated with hot water or hydrothermal treatment to induce crystallisation and create porous titania particles with high surface area. The porous HTPs were crystallised under milder conditions compared to the nonporous spherical HTPs, and this difference was attributed to the polycondensation states of hydrous titania. The resulting porous titania particles had a specific surface area of 216 m^2/g, despite their micron-scale size. This simple method offers a general-purpose approach for synthesising functional porous particles.
ADVANCES IN APPLIED CERAMICS
(2023)
Article
Chemistry, Multidisciplinary
Naofumi Uekawa, Minoru Kobayashi, Takashi Kojima
Summary: Stable CeO2 nanoparticle sol could be obtained using ethylene glycol as the dispersion solvent, which showed photochromic characteristics under visible light irradiation. The change in optical absorption spectra was attributed to charge transfer absorption between Ce3+ and Ce4+ ions in the nanoparticles.
RESULTS IN CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Yuki Kimura, Takashi Kojima, Mizuki Murofushi, Mana Kato, Kazuya Ujiie, Naofumi Uekawa
Summary: Micron-sized flower-like particles with plate-like titania petals were prepared through acid and posthydrothermal treatment. The obtained particles showed similar photodegradation ability to commercial TiO2 P25 under ultraviolet irradiation.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Materials Science, Ceramics
Kazuya Ujiie, Takashi Kojima, Kosuke Ota, Shuhei Hosoya, Naofumi Uekawa
Summary: By minimizing the crystallization temperature, this study successfully synthesized SrTiO3 particles with a high specific surface area, demonstrating the potential application of this method in fabricating efficient catalysts.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2021)
