RSC Advances
·
2020
·Vol. 10
·期 26
·15091-15097
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IF 3.119
Lei Ge,Meng Zhang,Ran Wang,Na Li,Lexin Zhang,Shufeng Liu,Tifeng Jiao
In this study, natural polymer material chitosan (CS) and graphene oxide (GO) with large specific surface area were used to prepare a new CS/RGO-based composite hydrogel by using glutaraldehyde (GA) as cross-linking agent. In addition, a CS/GA/RGO/Pd composite hydrogel was prepared by loading palladium nanoparticles (Pd NPs). The morphologies and microstructures of the prepared hydrogels were characterized by SEM, TEM, XRD, TG, and BET. The catalytic performance of the CS/GA/RGO/Pd composite hydrogel was analyzed, and the experimental results showed that the CS/GA/RGO/Pd composite hydrogel had good catalytic performance for degradation of p-nitrophenol (4-NP) and o-nitroaniline (2-NA). Therefore, this study has potential application prospect in wastewater treatment and provides new information for composite hydrogel design.
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ChemCatChem
·
2020
·Vol. 12
·期 15
·3880-3889
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IF 4.853
Xingling Zhao,Jun Xu,Yueying Chu,Guodong Qi,Qiang Wang,Wei Gao,Shenhui Li,Ningdong Feng,Feng Deng
Graphical Methane activation : Different types of Ga-CH 3 species were observed in methane activation on Ga-modified ZSM-5 zeolite, evidencing different pathways for heterolytic cleavage of C−H bond of methane. Two-dimensional solid-state NMR experiments provided detailed information on the location and local environment of the Ga-CH 3 species. Methane activation on Ga-modified ZSM-5 zeolites (Ga/ZSM-5) was studied by solid-state NMR spectroscopy. Two types of Ga species, namely highly dispersed oxides and cationic Ga species, were determined by 71 Ga QCPMG NMR. The activation of methane on Ga/ZSM-5 was explored by using 13 C and 1 H MAS NMR. Four types of Ga-CH 3 species along with Ga-OH groups were observed on Ga/ZSM-5, evidencing different pathways for heterolytic cleavage of C−H bond of methane. Two-dimensional (2D) 1 H- 1 H correlation NMR experiments provide detailed information on the location and local environment of the Ga-CH 3 species by correlating the protons in Ga-CH 3 with those in Ga-OH and other hydroxyls on zeolite. The structures of different Ga-CH 3 species were further determined by 2D 1 H- 13 C heteronuclear correlation NMR experiments, which were supported by theoretical calculations. The activation routes of C−H bond in methane were proposed on Ga/ZSM-5 zeolite.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2019
·Vol. 143
·期 1
·609-618
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IF 2.471
Cao Chengyang,Zhang Dan,Lu Song,Liu Changcheng
Guanidinium-5-aminotetrazole (GA) was synthesized by mixing 5-aminotetrazole (5-AT) and guanidine carbonate in heated deionized water. The composite propellants containing GA and differential oxidizers (Sr(NO 3 ) 2 , KNO 3 , NaNO 3 ) were prepared, and its structural characteristics, thermal decomposition behavior, kinetics, thermal safety and burning characteristics were investigated. The thermal analysis results showed that the decomposition of GA based propellants could be separated into five stages, consisting of one phase change reaction, one exothermic reaction and three endothermic reactions. The reaction mechanisms of each decomposition stage were also researched and considered it was following reaction order models. The thermal safety evaluations were conducted using the obtained related parameters of the exothermic reaction. Combined with the burning characteristics measurement results, GA coupled with Sr(NO 3 ) 2 represented a higher thermal safety and more stale combustion process than other two propellant samples, which is also act as a promising formulation to substitute 5-AT based propellant in fire-fighting area.
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CRYSTAL GROWTH & DESIGN
·
2017
·
IF 4.055
Tong-Ying Chang,Bing-Ping Yang,Chun-Li Hu,Dong Yan,Jiang-Gao Mao
The first series of metal phosphate iodates, namely, M(IO3)(HPO4)(H2O) (M = Sc 1, Fe 2, Ga 3, In 4), have been obtained through hydrothermal syntheses. The title compounds are isomorphic and crystallize in the monoclinic space group C2/c (No. 15). Their structures feature a three-dimensional (3D) network composed of 1D [M(HPO4)(H2O)]+ chains that are further bridged by IO3 groups, forming 1D tunnels based on eight-membered rings along the b-axis. Magnetic measurements revealed antiferromagnetic coupling interactions between magnetic centers in compound 2. The UV absorption spectra measurements revealed that compound 2 exhibits a broad absorption peak at about 427 nm. The TGA studies and IR spectra for compounds 1–4 were also performed.
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Journal of Energy Storage
·
2024
·
IF 8.9
Pengfei Pang,Yiran Bai,Hu Wang,Jiangchao Chen,Furong Zhang,Zhuoyan Yi,Yunyun Zhao,Kunpeng Jiang,Guisheng Zhu,Huarui Xu
The all-solid-state lithium batteries (ASSLBs) are widely acknowledged as the most promising candidate for energy storage devices due to their excellent safety features and high energy density. However, ASSLBs face significant challenges in terms of low ionic conductivity and the formation of lithium dendrites. Excitingly, composite solid-state electrolytes offer promising solutions to critical challenges. Here, we report a PEO-LiTFSI/LGLZTO organic-inorganic composite solid-state electrolytes (O-ICSEs). A high-performance Li 6.4 Ga 0.10 La 3 Zr 11.7 Ta 0.30 O 12 particles, co-doped with Ga and Ta, was incorporated into matrices of poly (ethylene oxide) (PEO) and lithium bis(trifluoro-methylsulfonyl)imide (LiTFSI) to establish a continuous pathway for the transportation of Li + . Additionally, the synergistic effect of Ga and Ta enhances the Li + transport capability within the LGLZTO particles. PEO-LiTFSI/LGLZTO O-ICSEs, which have fast ion transport channels, exhibit exceptional ionic conductivity (4.35 × 10 −4 S cm −1 at 60 °C) and possess a wide and stable electro- chemical window (5.5 V). The Li||PL(Ga 0.10 Ta 0.30 ) 25 ||Li cell demonstrates an outstanding cycle life exceeding 1000 h at a current density of 0.2 mAh cm −2 . The prominent electrochemical performance of PL(Ga 0.10 Ta 0.30 ) 25 O-ICSEs can primarily be attributed to their excellent electrode/electrolyte interfacial compatibility and effective suppression of Li dendrite growth. The proposed PL(Ga 0.10 Ta 0.30 ) 25 O-ICSEs offer a promising solution for designing highly efficient ASSLBs.
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INTERNATIONAL JOURNAL OF THERMAL SCIENCES
·
2024
·
IF 4.9
Xilong Ding,Yunpeng Jiang
In this study, glass bubbles (GBs) and gallium-based liquid metal (LM) were combined at varying volume fraction ratios to prepare the composites (GB-LMs), with the objective of optimising their state of matter and overall properties. Furthermore, the incorporation of high thermal conductive particles, including copper and silver, was pursued in augmenting the thermal conductive efficiency of the resulting composites. The thermal conductivity (TC), electrical conductivity (EC) and density were measured in order to construct a comprehensive structure - property relationship, while the underlying microphysical mechanisms were elucidated through the numerical simulations based on the distinctive architectures observed. As the loading of LM droplets increases, the GB-LMs undergo a transition from a scattered state to a thick pasty state and then to a dilute gel state. The composite sample with a loading of 32 % LM droplets exhibited a moderate pasty state, with a TC of 4.7 W/(m·K), an EC of 380 S/m, and a density of 2.4 g/cm 3 . The introduction of copper or silver powders into the GB-LMs resulted in a TC of 8.0 W/(m·K), an EC of 1.59 × 10 4 S/m and a low density of 3.2 g/cm 3 . The incorporation of high TC particles into GB-LMs has the potential to markedly improve the TC-to-density ratio of the composite system. These findings facilitate the implementation of LM-based composites in the advanced thermal management.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shuyang Shi,Chen Yang,Baozhong Ma,Hui Yang,Zhihe Cao,Yubo Liu,Yongqiang Chen,Chengyan Wang
Ga exhibits enrichment in coal-based solid waste, establishing it as a promising alternative source for Ga recovery. The HNO 3 pressure leaching process effectively achieves simultaneous leaching of Al and Ga while retaining most of the Fe in the residue. However, separating Ga from acidic solutions containing Fe and Al remains a persistent challenge in hydrometallurgy due to their similar physicochemical properties. Herein, a simplified and effective two-stage sequential solvent extraction process using acid phosphorus extractants (P507 and P204) for selective Ga recovery was proposed. Under optimized conditions, P507 removed 97.2 % of Fe from coal gangue HNO 3 leach liquor with limited co-extraction of Ga (10.1 %) and Al (5.7 %). Subsequent P204 extraction recovered 99.2 % Ga with only 9.1 % Al co-extraction from the Fe raffinate. Stripping with 2 mol·L –1 H 2 SO 4 yielded 88.0 % Ga recovery, with the extractants showing excellent regeneration and cycling performance. Mechanistic studies including FT-IR, UV-Vis, ESI-MS, and stoichiometric analysis confirmed coordination through both P = O and P–O–H groups, forming Fe(HA)A 3 and Ga(HL)L 3 complexes (A = P507; L = P204 ligands), respectively. This study presents a highly efficient approach for the separation of Fe/Ga/Al and Ga recovery from HNO 3 leach liquor, featuring exceptionally low acid depletion.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Zhang Shipeng,Li Zhen,Li Menggang,Gu Yu,Han Ying,Zeng Ruijin,Tao Lu,Liu Youxing,Ye Na,Han Xiaocang,Luo Mingchuan,Zhao Xiaoxu,Yu Yan,Guo Shaojun,Zhang Jin
Dual-atom catalysts are a class of important catalytic systems for accelerating the kinetics of solid-phase conversion of K 2 S 2 to K 2 S in potassium-sulfur battery cathodes, yet their uncontrolled metal-metal interactions greatly limit their catalytic capability, leading to low conversion efficiency of potassium-sulfur batteries. Herein, we report the precise synthesis of Ga-Cd dual-atom catalysts with strong orbital electron coupling of p -block Ga and d -block Cd, anchored on hollow mesoporous carbon spheres (Ga-Cd DAs-HMCS) for boosting the performance of potassium-sulfur batteries. Ga shows strong adsorption capacity for potassium polysulfides, but lacks sufficient valence electrons to promote their conversion. We demonstrate that the introduction of Cd with a more filled valence electron configuration enables the transfer of electrons into the empty orbitals of Ga via strong orbital electron coupling, which enhances the catalytic ability of the Ga site to activate the S-S bond in potassium-sulfur chemistry, and thus accelerates the conversion kinetics from K 2 S 2 to K 2 S. This enables a S/Ga-Cd DAs-HMCS cathode material with an improved rate performance up to 589 mAh g −1 at 5 A g −1 .
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Jiabing Geng,Yafang Luo,Jiale Song,Hongjie Yu,You Xu,Hongjing Wang,Kai Deng,Ziqiang Wang,Liang Wang
Electrocatalytic reforming of polyethylene terephthalate (PET)-derived ethylene glycol (EG) into high-value glycolic acid (GA) is a potential strategy for PET plastic upcycling, and the efficiency mainly depends on the identification of high-performance electrocatalysts. In this study, we synthesize Ga-incorporated PdCu metallene (GaO x -PdCuene) with an oxygen-bridge structure (GaO x -PdCuene) for the electrolysis of PET hydrolysate towards GA production. GaO x -PdCuene demonstrates an impressive Faradaic efficiency of 98.72 % for GA production at a potential of 0.9 V, along with stable operation for over 100 h. The experimental and theoretical analyses show that the Ga-induced oxygen-bridge structure, accompanying with p-d orbital hybridization, efficiently regulates electronic structure of Pd, which effectively facilitates *OH species generation and optimizes adsorption energies of intermediates on Pd active sites, leading to high activity and selectivity for GA generation. The work highlights the design of oxygen-bridge structure in Pd-based electrocatalysts for efficient conversion of PET wastes to high-value GA product.
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Nanoscale
·
2025
·
IF 5.1
Chuangxin Zhou,Zhiheng Zhang,Yuan Gao,Weize Diao,Siyi Zou,Jun Zhu,Jiangtao Xu,Guozhen Liu
Surface modification of Eutectic Gallium Indium (EGaIn) to inhibit oxidation has been a long-lasting challenge in material science, with limited research reporting the formation of a covalent bond between Ga and modifiers for stability purposes. Taking advantage of strong reductive property of EGaIn, this study developed a simple method for spontaneous reduction of aryldiazonium salts on EGaIn nanoparticle surface to form stable covalent Ga-C sigma bonds, effectively suppressing surface oxidation.Comprehensive characterization confirmed the formation of the covalent Ga-C bond rather than Ga-N=N-C bonds on the EGaIn nanoparticle surface. Approximately 20% of Ga(0) in EGaIn forms Ga-C bonds. Notably, the short chain aryl modified EGaIn nanoparticles exhibited high stability and negligible surface oxidation. This straightforward strategy for preparing stable aryl modified EGaIn nanoparticles allows the introduction of a range of ligands on the EGaIn nanoparticle surfaces, offering promising opportunities for diverse applications across multiple fields.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Rui Geng,Xianjun Niu,Yajie Liu
HZSM-5 zeolite is extensively used in methanol-to-aromatics (MTA) reactions; however, its low aromatics selectivity limits its performance due to weak intrinsic aromatization ability. In this study, a series of bifunctional x -Ga 2 O 3 /HZSM-5 were synthesized by mechanically mixing different Ga 2 O 3 isomers with HZSM-5 to systematically investigate the influence of the crystal structure on methanol aromatization. Among them, β-Ga 2 O 3 /HZSM-5 catalyst exhibited the highest aromatic selectivity, reaching 40 mol%. Structural characterization by XRD, N 2 adsorption, XPS, H 2 -TPR, XANES, and EXAFS analyses revealed that the dispersion and reducibility of extra-framework Ga 3+ species varied with the Ga 2 O 3 structure. In particular, the monoclinic β-Ga 2 O 3 exhibited a pronounced interaction with Brønsted acid sites of HZSM-5, promoting the formation of highly active and stable four-coordinated [Ga 2 O 2 ] 2+ dimers. These species functioned as efficient dehydrogenation and cyclization centers, thereby markedly promoting aromatics production.
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JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 12
·6975-6985
·
IF 2.047
Ma Chaofan,Shen Jun,Tan Liming,Deng Jinzhao,Zeng Chengzong
Ga-based liquid metal (LM) with high thermal conductivity is considered to be a promising thermal interface material (TIM) for electronic thermal devices; however, its pump-out and easy oxidation hinder its popularization. Herein, fluororubber (FKM) was selected as the sealing material to prevent the pump-out of eutectic Ga-In-Sn (EGaInSn) and reduce its oxidation during long-term extreme service conditions. After being placed in an oil bath at 125°C for 4 weeks, the FKM soaked in EGaInSn could still hinder the penetration of EGaInSn and maintain good elasticity and plasticity. When EGaInSn was applied to a radiator cap as TIM, the maximum radiator temperature at full load was 47% lower than that without TIM, and 14% lower than that with commercial thermal grease. Moreover, after experiments including 1000 h of high-temperature aging, 1000 h of constant temperature and humidity, and 1000 thermal shocks, there was no pump-out or apparent oxidation in the sealing structure with FKM.
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