JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Lidan Deng,Jiawei Wang,Zaikun Wu,Chenhong Liu,Ling Qing,Xiaowei Liu,Jie Xu,Zijian Zhou,Minghou Xu
Supported Pt-based bimetallic catalysts are representative types of dehydrogenation catalysts used for alkanes to olefins conversion. The platinum in these catalysts exhibits unique structural features accompanied with changes in electronic states due to the addition of the second metal. To investigate the impact of each effect on the activity for propane dehydrogenation , a series of Pt-M/SiO 2 (M= Fe, Cu, Ga, In and Sn) catalysts were prepared and used for propane dehydrogenation. Utilizing various characterization techniques, the geometric and electronic properties of these catalysts were studied. The relationships between the specific activity of bimetallic platinum catalysts in propane dehydrogenation and atomic sizes of alloys (i) and the total density of unoccupied d bands in platinum (ii) were considered. Via alloy formation, it was found that dilution of the active metal Pt occurred in these SiO 2 supported bimetallic catalysts, and the lattice parameter of Pt-M alloys decreased on Pt-Fe, Pt-Cu and Pt-Ga alloys, but increased on Pt-In and Pt-Sn alloys when compared with that of Pt foil. Catalytic activity was evidently shown to not be a function of the lattice parameters of Pt-M alloys, but appears closely related with the d -holes of Pt in Pt-M bimetallic catalysts. More d holes show favorably high activity. Among the studied Pt-M/SiO 2 (M= Fe, Cu, Ga, In and Sn) catalysts, the prominent and primary role of the electronic effect was demonstrated.
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CRYSTENGCOMM
·
2021
·Vol. 23
·期 30
·5200-5207
·
IF 3.545
Qi-Ming Qiu,Guo-Yu Yang
Three new metal borates, namely K0.5[B6O10]·H2O·1.5H3O (1), [GaB5O10]·H2en (2) and NaCs[Ga{B5O9(OH)}{BO(OH)2}] (3), have been synthesized under solvothermal conditions. Compound 1 features an intricate 3D framework composed of [B6O13]8− clusters, resulting in a 6-connected achiral pcu net. After introducing the organic gallium, one of the BO4 groups of the [B6O13]8− cluster is substituted by a GaO4 polyhedron to form the acentric [GaB5O13]8− cluster in 2. It also displays a high second-harmonic generation (SHG) response about approximately 2.6 times that of KH2PO4 (KDP), which is higher than those of alumino-borates (ABOs) containing the acentric [AlB5O13]8− cluster (0.3–2.1 times that of KDP). Dipole moment calculations have been carried out to confirm these results. In the process of trying to synthesize a new compound with a denser structure than 2, we have unexpectedly obtained 3 crystallized in the centrosymmetric (CS) space group, which shows a 1D structure constructed from the [Ga{B5O9(OH)}{BO(OH)2}]2− cluster. This kind of low-dimensional structure is rare in gallo-borates (GBOs) as well as ABOs.
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CHEMISTRY OF MATERIALS
·
2012
·
IF 7.286
Gang Wang,Shuyang Wang,Yong Cui,Daocheng Pan
A novel and versatile metal–organic molecular precursor-based solution approach and the fabrication of high efficiency Cu(In,Ga)(S,Se)2 solar cells are presented. Many types of metal oxides, hydroxides, and acetylacetonates (acac), such as Cu2O, ZnO, SnO, Sb2O3, MnO, PbO, In(OH)3, Cd(OH)2, Ga(acac)3, and so forth, can be easily dissolved in butyldithiocarbamic acid, forming thermally degradable metal–organic molecular precursor solutions. By developing a simple and green ethanol solution-processed route and tuning the chemical composition of the Cu(In,Ga)(S,Se)2 thin film, as-fabricated solar cells exhibit an average power conversion efficiency up to 8.8%.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xueting Liu,Yajing Zhu,Yutong Jing,Yuheng Zhu,Lichuan Wu,Wenqian Nong
Bacteria deep in the wound can cause prolonged inflammation and dysfunctional angiogenesis, impeding healing and potentially leading to chronic conditions, disability, or even death. To address this, we developed a double-layer metal-organic framework (MOF) microneedle (MN) patch system (GCM-MN-CSH), designed to accelerate the healing of infected wounds through programmed therapy. The GCM-MN-CSH system consists of a hydrocaffeic acid-modified chitosan (CSH) hydrogel patch and a metformin (Met)-loaded Ga-Car-MOF (GCM)-based γ-polyglutamic acid matrix MN array (GCM-MN). The GCM nanoparticles were incorporated in the MN tips. The deep, localized penetration of GCM-MN, combined with the multifunctional activity of GCM, enables effective delivery of GCM nanoparticles into the dermis. These nanoparticles acid-response release Ga 3+ ions and benzylpenicillin carboxylate, which possess antimicrobial activity, as well as Met, which promotes tissue regeneration. The adhesive CSH patch not only helps create a controlled, moist environment at the wound site but also provides antimicrobial properties on the surface. Together, the components of the GCM-MN-CSH system work synergistically to control infection, reduce inflammation, stimulate tissue proliferation, support tissue remodeling, and ultimately enable programmed wound healing. This advanced system offers a promising therapeutic platform for the management of infected wounds.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Fang-Jun Cao,Xiang Hou,Li Ma,Tie-Zhi Jin,Wei-Ping Yang,Hui Feng
Diabetic ulcer is a common chronic wound, and also one of the typical complications of diabetes. The pathological environment of diabetic ulcer caused by high glucose levels is extremely complex, so the treatment for diabetic ulcers remains a challenge. As a proof of concept, we herein propose to use an ultra-small self-assembled gallic acid (Ga)‑iron (Fe)‑copper-(Cu) metal–phenolic nanoparticles (Ga-Fe-Cu NPs) based sprayable hydrogel for diabetic wound treatment. The Ga-Fe-Cu NPs is synthesized and then incorporated into sprayable hydrogel dressing with sodium alginate/chitosan quaternary ammonium salts to improve therapeutic compliance, culminating in the formulation of Ga-Fe-Cu NPs based sprayable hydrogel. The Ga-Fe-Cu NPs effectively scavenges reactive oxygen species (ROS), reduces oxidative stress, shortening the transition between inflammation and proliferative phase and maintaining redox balance. The Ga-Fe-Cu NPs-based sprayable hydrogel exhibits excellent mechanical properties. The sprayable hydrogel aided in alleviating the hypoxic conditions in bacteria-infected diabetic wound healing, killing bacteria, decreasing inflammation, promoting vascularization, alleviate hypoxia to achieve scarless repair of diabetic infected wound. Ultimately, the Ga-Fe-Cu NPs-based sprayable hydrogel demonstrates superior therapeutic efficacy, achieving 96.6% closure of infected wounds.
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Journal of Materials Chemistry A
·
2026
·
IF 9.5
Ziyao Wang,Sijia Huo,Meichen Pan,Yihan Qiu,Ying Tian,Ying Zhou,Wei Yan,Wen Wang,Yu Zhou,Xiaoming Duan
Lithium metal is considered an ideal anode material owing to its high specific capacity, low density, and low redox potential, but its practical use in liquid systems is hindered by dendrite growth and interfacial instability. Solid-state electrolytes (SSEs) offer high thermal stability and mechanical strength, with Li 7 La 3 Zr 2 O 12 (LLZO) particularly attractive for its high ionic conductivity and wide electrochemical window. Semi-solid-state electrolytes (SSSEs), integrating the advantages of SSEs and liquid electrolytes (LEs), can be further enhanced by introducing porous solid frameworks. Such structures improve wettability and transport while providing mechanical support that suppresses dendrites, thereby achieving both high conductivity and structural safety. In this work, a two-dimensional porous solid-state skeleton model was established to investigate the influence of porosity on lithium-ion transport. The percolation threshold was determined to be 47.91% porosity, indicating the minimum connectivity required for efficient ion migration. Based on these insights, a graphite-template sacrificial method was employed to fabricate a highly interconnected porous Li 6.25 Ga 0.25 La 3 Zr 2 O 12 (LGLZO) framework (P G LF). The ionic conductivity of the P G LF-LiPF 6 SSSE reached 3.02×10 -3 S cm -1 at room temperature. The constructed Li/Li cell can be stably cycled for more than 1600 h at 0.5 mA cm -2 , and the capacity retention rate of the LFP/Li cell was 91.62% after 2000 cycles at 2 C. In addition, similar properties can be achieved by replacing the formwork material (charcoal powder). This work established a correlation between porosity and ion transport performance, providing a promising preparation method for high-performance lithium metal batteries (LMBs).
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 12
·5641-5648
·
IF 1.754
Smolenski Valeri,Novoselova Alena,Yan Yongde,Xue Yun,Ma Fuqiu
The equilibrium potentials of Me(III)/Me (Me = Dy, U) couples and the double Me–Ga, Me–Cd alloys vs. Cl − /Cl 2 reference electrode were measured at the temperature range 673–973 K in molten LiCl–KCl–CsCl eutectic by open-circuit potentiometry. The apparent standard potential and the base thermodynamic properties of alloys were determined. Separation factor for Dy/U couple was calculated on gallium and cadmium electrodes. In addition, it was found that the application of gallium electrodes has a significant advantage over cadmium electrodes in the process of electrochemical separation of uranium and dysprosium.
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ACS Omega
·
2022
·
IF 4.132
Wenjing Fu,Cundi Wei,Jing Zuo,Jiupeng Zhang,Jinyi Zhang,Shaonan Xu
The Al sheets alloyed by Ga-In-Sn are generally utilized to react with water for H2 production, while the valuable byproducts, i.e., alumina hydrates, have not been fully studied. In this work, through controlling the reaction temperature, three types of alumina hydrates, bayerite (40 °C), pseudo-boehmite (PB) (70–120 °C), and boehmite (130–160 °C), were successfully prepared based on a series of interface reactions and structural transformations. These alumina hydrates and their calcined products (alumina) possess high purity with a total impurity element content of <450 ppm, especially an extremely low sodium content (<21 ppm) and iron content (<52 ppm). Significantly, the obtained pseudo-boehmite displays excellent surface properties (specific surface area: 332.7 m2 g–1, pore volume: 0.3 cm3 g–1, and pore diameter: 3.6 nm), competitive to the current commercial SB powder by Sasol. This work not only deepens the understanding of the byproducts in a Ga-In-Sn-alloyed Al–water reaction but also establishes a facile “green” method oriented to industrial applications, which is promising for the linkage benefits of the hydrogen production industry.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiaxing Song,Jun Wang,Xudong Du,Yuhan Pan,Jingyuan Sima,Youqi Zhu,Qunxing Huang
Non-thermal plasma (NTP)-assisted catalytic pyrolysis is a promising technology for producing benzene, toluene, ethylbenzene, and xylene (BTEX) from mixed waste plastics. A primary challenge in this approach is the need to achieve a high selectivity for the target products. To address this challenge, this study focused on the preparation of Ga-modified zeolites. The results showed that Ga loading was effective in increasing BTEX yields for the zeolites of USY, β, and HZSM-5 by 7.49%, 4.72%, and 8.63%, respectively. Among these zeolites, HZSM-5-Ga-N 2 was the most suitable for catalyzing the NTP-assisted pyrolysis reaction to produce BTEX hydrocarbons, with a maximum selectivity of 63.19% and a maximum yield of 31.84%. This was because the pore of HZSM-5 matched the ring size of BTEX, and NTP improved the distribution of Ga 2 O 3 active sites, allowing more acidic active sites to participate in the catalytic reaction. This work provides an applicable solution to increase the selectivity and yield of BTEX from NTP-assisted pyrolysis of mixed waste plastics with Ga-loading catalysts.
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Nanoscale
·
2020
·Vol. 12
·期 26
·14180-14187
·
IF 6.895
Luyan Wu,Jie Hu,Qilin Zou,Yaling Lin,Decai Huang,Dejian Chen,Hongyu Lu,Haomiao Zhu
Persistent luminescence nanophosphors (PLNPs) emitting in the second near-infrared window (1000–1700 nm, NIR-II) are emerging as one promising class of in vivo bio-imaging agents due to their unique advantages including non-autofluorescence and low optical scattering in tissues. Currently, it remains a great challenge to synthesize nanosized lanthanide-doped inorganic NIR-II phosphors with a good persistent luminescence performance. Herein, we present a salt microemulsion method for synthesizing Ce3+, Cr3+, Nd3+ codoped Y3(Al/Ga)5O12 nanocrystals, which generate multi-wavelength persistent luminescence in the visible (∼508 nm, 5d1 → 4f of Ce3+), the first near-infrared window (∼890 nm, 4F3/2 → 4I9/2 of Nd3+) and NIR-II (∼1063 nm, 4F3/2 → 4I11/2 of Nd3+) regions. Under illumination of a 410 nm diode (3 W) for 10 min, the observed duration time of NIR-II persistent luminescence is as long as 60 min at room temperature. Moreover, the persistent luminescence can be excited efficiently by multiple excitation sources including a blue diode, white LEDs and an X-ray generator, which is crucial for deep tissue imaging applications. By comparing the penetration depth between NIR-I and NIR-II persistent luminescence through chicken breast, we prove that NIR-II photons exhibit a deeper optical penetration length (3.9 mm) than that of the NIR-I ones (2.5 mm). In addition, the NIR signals can still be detected 3 min after ceasing the excitation source by a small animal imaging system (InGaAs detector) when the thickness of the covering chicken breast is 20 mm. These results show great promise for Y3(Al/Ga)5O12:Ce3+,Cr3+,Nd3+ nanocrystals as a PLNP for bio-imaging applications with deep penetration depth and a high signal-to-noise ratio.
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DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 43
·15538-15544
·
IF 4.099
Ruijiao Chen,Xiaowen Wu,Zhi Su
A series of quaternary chalcogenides, Na3ZnMIIIQ4 (MIII = In, Ga; Q = S, Se), were successfully synthesized for the first time through a high temperature solid-state reaction method. All of them exhibit similar structures and crystallize in the I41/acd space group of the tetragonal system. In their structures, typical super-tetrahedron (T2-type) clusters composed of four vertex-sharing (Zn/MIII)S4 tetrahedra are discovered and these T2-clusters further link together to form interesting wavelike chains. Adjacent T2 clusters present a torsion angle of 24.6° with each other when viewed along the c-axis, which has rarely been found among all the reported T2-containing chalcogenides. Moreover, we have systematically investigated the connection modes of NaSn (n = 4–6) in all the known Na-contained quaternary sulfides, and the result shows that the connection modes (corner-, edge-, and face-sharing) of NaS6 ligands in the title sulfides are also rarely (only 3%) found. Besides, the optical properties including diffuse-reflection and Raman spectra are systematically characterized. Theoretical calculations based on the first principles theory were also used to analyze their structure–performance relationships.
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LUMINESCENCE
·
2024
·Vol. 39
·期 11
·1-8
·
IF 3.2
Zhigang Wang,Jiayu Wang,Dangli Gao,Wenqian Xu,Wenna Gao,Xiangyu Zhang,Sining Yun,Xiaojun Wang
Double wavelength emitting phosphors with hypersensitive thermal response are important for optical/thermal sensors and multiplexing optical data storage technology. However, it is a daunting challenge to develop multicolor electron-trapping materials with superheat sensitivity and anomalous quenching luminescence characteristics for information storage. Here, based on the selection of host lattice and the control of doping ion types, we have designed Mn 2+ - and/or Cr 3+ -activated persistent materials with excellent fluorescence properties. Among these phosphors, Mn,Cr co-activated biphasic mixture exhibits not only sensitive anomalous thermosensitive fluorescence properties but also multicolor and multimode fluorescence emission characteristics derived from Mn and Cr simultaneously. The corresponding multimode fluorescence mechanism is proposed based on afterglow energy transfer and deepening trap effect. Especially, based on the excellent fluorescence performances, these phosphors as information storage medium demonstrate multilevel information storage by a combination of the trap multiplexing and wavelength multiplexing technologies. The study here provides not only the ideas for designing and synthesizing new electronic materials but also a material foundation for the fourth generation of optical information storage and encryption.
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