NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 29
·13993-14001
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IF 3.3
Wenhui Wu,Conger Deng,Qian Lei,Honglin Chen
ZSM-5 could be a good candidate for the catalysis of formaldehyde to trioxane (TOX) because of its appropriate and adjustable acid properties. However, the space-time yield (STYTOX) and selectivity of the TOX catalyzed by ZSM-5 zeolites are relatively low at present. [Ga, Al]-MFI zeolites containing different Ga/Al atomic ratios were used as catalysts for reaction of synthetic TOX. The structural information of the materials was illustrated by characterization through XRD, ICP-OES, XPS, SEM, BET analysis, and MAS NMR spectroscopy. And the acid properties of the materials were tested by NH3-TPD and Py-IR. The catalytic performance test showed that the STYTOX of [Ga, Al]-MFI-50 is about twice that of ZSM-50 or [Ga]-MFI-50. And the selectivity of TOX is also significantly improved compared to that with [Al]-MFI-50 and Ga-MFI-50. This is because the introduction of Ga atoms into ZSM-5 causes the Brønsted acid content to rise, resulting in STYTOX. It is worth noting that adjusting the Ga/Al atom ratio in the framework affects the B/L value of the zeolite, which leads to the optimization of the selectivity.
研究领域:
化学工程
·
催化科学
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产品关联
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Jiangtao Guo,Liangfei Duan,Wen Yang,Qin Wang,Yunbo Zhang,Yong Zhang,Zhong Lin Wang,Peizhi Yang
Highly efficient and flexible power sources have always been the focus and goal in the field of wearable electronics. However, the existing wearable power sources are limited by their large size, high weight, electrolyte leakage, and poor mechanical compliance, which seriously hinders their practical applications. Herein, we propose a novel strategy to achieve and demonstrate a fabric-based high-performance wearable triboelectric nanogenerator (TENG) structure. The metals of gallium (Ga), bismuth (Bi), indium (In), and tin (Sn) are mixed according to specific mass ratios, and then they are transformed in liquid phase to form room-temperature multiphase soft metals of GaBiInSn. The material exhibits both metallic and fluidic properties, and possesses a characteristic of multiphase structure. The GaBiInSn material is directly deposited between polytetrafluoroethylene (PTFE) layers and nonwoven fabrics to establish multi-level conductive and frictional interfaces, creating charge transfer and solid-liquid hybrid dielectric layers. Therefore, the thin film-type triboelectric nanogenerators with a structure of PTFE/GaBiInSn/nonwoven fabric (LM-P-TENGs) is manufactured. The LM-P-TENGs can be integrated onto fabrics without compromising their breathability, comfortableness, and flexibility. Particularly, LM-P-TENGs efficiently convert the mechanical energy of human limb movements into sustainable electrical energy output. Under the human limb mechanical triggering conditions, LM-P-TENG achieves a champion specific open-circuit voltage up to 900 V, peak short-circuit current density of 43.3 mA/m 2 , and high power density of 12.56 W/m 2 . This work demonstrates the application potential of room-temperature multiphase soft materials in flexible wearable power sources, while introducing a novel power supply mode for wearable electronics. Additionally, the LM-P-TENGs also present applications in self-powered wearables, medical biosensing systems, human-machine interaction systems, near-eye display systems, etc. for the flexible electronics.
研究领域:
材料科学
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能源技术
·
柔性电子学
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产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2020
·Vol. 78
·期 10
·5977-5995
·
IF 2.014
Chen Ziyang,Yang Tuantuan,Chen Yang,Liang Mei,Zou Huawei
Gallium has important applications in new energy, semiconductor, and many other fields. Although a lot of work has been done in the field of preparing amidoxime resin to obtain gallium, there are still problems such as low adsorption capacity and relatively slow adsorption rate. In this paper, we report several high-performance porous amidoxime membranes (HPAOM). (Theoretical maximum adsorption capacity of gallium is 88.339 mg/g at 25 ºC, and the fastest adsorption equilibrium time is only 16.9 min which prepared by non-solvent-induced phase separation.) We studied the effect of pore structure on the adsorption properties of porous amidoxime membranes. The comparative analysis of the adsorption kinetics of the porous amidoxime membrane prepared by adding different contents of pore-forming agent PMMA and spray method shows that the surface through-hole structure is very important for the improvement in the adsorption rate. The amidoxime film prepared by spraying also showed good selective adsorption. It is also found that it has good adsorption performance in a wide temperature range via the analysis of adsorption isotherm curve of amidoxime porous membrane. It provides a new method for the preparation of gallium adsorption materials with large adsorption capacity, fast adsorption speed, good selective adsorption of Ga and V, and wide adsorption temperature range.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Hui Yang,Ming-Mei Zhao,Lan Li,Le-Xi Zhang
Because of their structural flexibility, earth abundance, and environmental friendliness, ZnO nanomaterials have been widely utilized for gas sensors. ZnO-based sensors showed a high gas response performance, which can be essentially attributed to the effect of oxygen vacancies. However, rare research has focused on the type of oxygen deficiency for regulating gas sensing properties. In this work, we first synthesized ZnO nanorods with a low BET surface area of 6.8 m2/g, presenting superior normalized gas sensitivity toward 200 ppm xylene. This was attributed to very high amounts of doubly positively charged oxygen vacancies forming in these nanorods by creating a highly anoxic environment for oxygen-deficient ZnO growth. In contrast, Ga doping can serve as active sites that are beneficial for adsorbing more oxygen into the lattices of ZnO, resulting in a reduced number of doubly positively charged oxygen vacancies, lower oxygen vacancy-related photoluminescence intensity, and worse xylene sensing performance. Therefore, the doubly positively charged oxygen vacancies play an important role in the gas sensing performance of metal-oxide semiconductors. The results obtained can provide a strategy and facilitate research on the design of other metal-oxide semiconductors with gas sensing properties.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qi You,Jun Zhu,Luomeng Chao,Hai Zhang,Sihua Ha
Controlling the crystallization of gallium oxide (Ga 2 O 3 ) crystal as well as intrinsic defects (oxygen vacancies) are crucial steps in obtaining high-quality material and elucidating how defects affect semiconductor properties . Gallium oxide hydroxide (GaOOH) was firstly synthesized via the reaction of gallium nitrate (Ga(NO 3 ) 3 ) with different alkalis (Urea, NH 3 ·H 2 O, Na 2 CO 3 and NaOH) using the precipitation technique. Then, Ga 2 O 3 powder was obtained by adding carbon powder as reducing agent at the calcination stage. The β-Ga 2 O 3 powder prepared by NH 3 ·H 2 O were found to have the best crystallization as analyzed by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). Meanwhile, the photoluminescence (PL) and X-ray photoelectron spectroscopy (XPS) results combined with the first-principles calculation indicate that the Ga 2 O 3 powder made by NH 3 ·H 2 O also has the least intrinsic oxygen vacancies .
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Bo Meng,Shenyong Ren,Zhi Li,Weiyu Song,Qiaoxia Guo,Baojian Shen
Decreasing steam treating temperature of zeolite Y to prepare USY has great attraction for industrial production of FCC catalysts, which is often operated at high temperature thus leading to huge energy consumption. Heteroatoms in the framework of zeolite Y are easier to be removed under steam condition, but the introduction of heteroatoms often leads to the decrease of relative crystallinity of zeolite. When Ga 3+ is introduced into the framework of zeolite Y, high crystallinity is well maintained in this work. Interestingly [Al, Ga]-NaY can be treated at low steam temperature to form [Al, Ga]-USY with very good mesoporosity and high framework SiO 2 /Al 2 O 3 ratio. The sample [Al, Ga]-NaY-8 has a distinctive micropore size distribution at 0.92 nm which is much bigger than conventional microporous NaY. DFT study disclosed the reason of low temperature steam treatment. The catalytic cracking of 1,3,5-TIPB and n -octane showed that the catalyst [Al, Ga]-USY obtained at lower steam treating temperature presented good performance.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 11
·2331
·
IF 4.6
Ajeesh Kumar Somakumar,Ivo Romet,Agnieszka Grabias,Marcin Kruk,Shusaku Hayama,Damian Wlodarczyk,Justyna Barzowska,Yadhu Krishnan Edathumkandy,Eduard Feldbach,Puxian Xiong,Yaroslav Zhydachevskyy,Monika Trzaskowska,Hanka Przybylinska,Andrzej Suchocki
An extensive experimental study of trivalent iron (Fe3+) ions in orthorhombic lithium gallate nanocrystals was undertaken. Various spectroscopic methods, such as Raman spectroscopy, extended X-ray absorption fine structure, the Mössbauer effect, electron paramagnetic resonance, photoluminescence, thermoluminescence, and cathodoluminescence were used to investigate the synthesized phosphor. This study revealed the existence of multiple Fe3+sites, out of which the tetrahedral sites are preferentially occupied. Extensive optical studies showed that the Fe3+doped lithium gallate phosphor is a promising candidate for various luminescence and thermoluminescence-related applications in the near-infrared regime.
研究领域:
材料科学
·
光学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 10
·751
·
IF 4.3
Jian Li,Laizhi Sun,Derun Hua,Xinning Lu,Dandan Yang,Zhiying Wu
Gallium-modified Zeolite Socony Mobil-5 (ZSM-5) zeolites were synthesized using wetness impregnation and hydrothermal synthesis methods. The structural and acidic properties of the zeolites were characterized through an analytical instrument, which demonstrated that Gallium-modified HZSM-5 zeolites retain the Mobil five instructure (MFI) framework structure, but exhibit a reduction in Brønsted acid sites and a decrease in micropore size. The catalytic performance of these zeolites in the pyrolysis of cellulose biomass and polyethylene was tested. Compared with HZSM-5, Ga-modified HZSM-5 zeolites considerably increased monoaromatic yields while reducing alkanes production. In particular, gallium-impregnated HZSM-5 increased the monoaromatic yield from 37.6% for ZSM-5 to 43.2%, while hydrothermal synthesized Ga-HMFI reduced polyaromatic and alkane yields from 6.6% and 24.6% for HZSM-5 to 2.9% and 11.4%, respectively. These results indicated that Ga-modified HZSM-5 zeolites can improve the synergy between cellulose-derived oxygenates and polyethylene-derived olefins, enhancing the yield of petrochemical hydrocarbons compared to that predicted by theoretical calculations.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Mei Yan,Wen-Dong Yao,Wenfeng Zhou,Wenlong Liu,Ru-Ling Tang
Inorganic gallates are attractive owing to their abundant structures and wide applications for nonlinear optics, magnetism , molecular sieve and catalysis. Herein, a new cesium cadmium gallate, CsCdGa 3 O 6 , has been synthesized by a solid-state reaction, which is the first I-II-III-O (I = alkali metals, II = divalent metals, III = Al, Ga, In) type oxide. It crystallizes in the centrosymmetric space group P 2 1 / c , and the three-dimensional Ga–O polyanionic framework is constructed by [Ga 4 O 14 ] 16− helical belts linked [Ga 6 O 6 ] 6+ and [Ga 8 O 8 ] 8+ cages. Thermal analysis indicates that it possesses high thermal stability. Various characterizations and results analysis including XRD , TG-DSC, IR, Raman spectrum , as well as electronic structure calculations were performed.
研究领域:
无机化学
·
材料科学
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2021
·
IF 3.059
Hongliang Shen,Jia He,Xiaoqiang Shao,Qin Su,Donglin Zhao,Shaojie Feng
The modified ZnGa 2 O 4 microspheres were prepared by the conventional hydrothermal method and used to catalyze methane combustion reaction. Because Co 2+ and Zn 2+ have similar ion radii, so it seems that the Zn 2+ at the tetrahedral (T d ) position of ZnGa 2 O 4 was partially replaced by Co 2+ to adjust the oxygen distribution, and finally the Zn 1-x Co x Ga 2 O 4 (x = 0.1, 0.3) microspheres catalysts was obtained. X-ray photoelectron spectroscopy (XPS) analysis exhibited that Co 3+ were present in the Zn 1-x Co x Ga 2 O 4 (0.1, 0.3) samples, and interstitial oxygen were formed to maintain electrical neutrality. Oxygen temperature programmed desorption (O 2 -TPD) profiles showed that there was only one oxygen species desorption from ZnGa 2 O 4 sample, while the Zn 1-x Co x Ga 2 O 4 (0.1, 0.3) samples had two oxygen desorption peaks, that is the first one is surface adsorbed oxygen, the second is lattice oxygen. The catalytic methane combustion performance of the samples indicated that the partial substitution of Co 2+ for Zn 2+ in ZnGa 2 O 4 can effectively improve its activity.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shiying Fan,Yao Liu,Zetao Zhang,Mengnan Huang,Yuejiao Wang,Jing Gao,Ying Xiong
Three-dimensional mesoporous silica is a distinctive nanomaterial celebrated for its unique structure, substantial specific surface area, enhanced utilization of active surfaces, and improved adsorption and catalytic reaction capabilities. Nevertheless, its limited surface functional groups often impede its effective ion adsorption capacity. Here, inspired by the mussel-adhesive phenomenon, in this study, we introduced a straightforward layer-by-layer assembly approach to fabricate a new series of KIT-6@x-catechol/polyethyleneimine composites, the catechol/polyethyleneimine is the shell and KIT-6 is the core. Importantly, catechol(CA) and polyethyleneimine(PEI) polymers as selective layers with dense structures and abundant cation exchange groups, resulting in outstanding adsorption performance for our material. At a pH of 3.0, Ga(III) exhibited a maximum adsorption capacity of 88.65 mg g −1 on the adsorbent. Furthermore, the adsorbent demonstrated selective adsorption capabilities for Ga(III) over Ge(IV), Al(III), Cu(II), Zn(II), and Co(II). The primary adsorption mechanism of KIT-6@x-CA/PEI is chelation that occurs through coordination between the O atom on the phenolic hydroxyl group of CA and Ga 3+ , Ga(OH) 2+ , Ga(OH) 2 + under pH 3.0 conditions. In summary, the synthesized KIT-6@x-CA/PEI exhibits significant potential for water treatment containing Ga(III) through adsorption processes.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Hanrui Xi,Xihao Jiang,Shilang Xiong,Yinuo Zhang,Jingyu Zhou,Min Liu,Zhigang Zhou,Chengyu Zhang,Shiwei Liu,Zhisheng Long,Jianguo Zhou,Guowen Qian,Long Xiong
Exacerbation of osteolysis in osteoporotic bone defects presents a significant challenge for implant-based treatments. This underscores the urgent need to develop implants that actively mitigate osteolysis while simultaneously promoting bone regeneration. In this study, the osteogenic potential of mesoporous bioactive glass (MBG) and β-tricalcium phosphate (β-TCP) was combined with the anti-bone resorption property of Ga doping. Ga-MBG was synthesized using a self-transformation method and subsequently incorporated into β-TCP at concentrations of 5 wt%, 10 wt% and 15 wt%. Scaffolds were prepared using extrusion-based 3D printing. The cytocompatibility of the composite scaffolds and their regulatory effects on the differentiation of osteoblasts and osteoclasts were systematically examined. In addition, the molecular mechanisms underlying bone regeneration and osteolysis regulation in osteoblasts were explored. Subsequently, cranial defects were repaired in a rat model of osteoporosis to assess the therapeutic efficacy and biological safety of the optimal concentration of the Ga-MBG/TCP composite scaffold. These findings indicated that the 10 wt% Ga-MBG/TCP composite scaffold exhibited excellent biocompatibility, enhanced new bone formation, and effectively mitigated osteolysis. These results provide a foundation for further investigation into the optimal concentration of Ga-MBG implants and highlight their potential application in future therapies for osteoporotic bone defects.
研究领域:
生物材料学
·
骨科医学
·
再生医学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）