Journal of Physical Chemistry C
·
2024
·
IF 3.3
Yujie Zong,Yizhou Wang,Jinze Zhai,Wenbin Su,Chang Tan,Zhihao Li,Yuqing Sun,Hongxiang Wang,Chunlei Wang,Hongchao Wang
By virtue of temperature differences, which are in hundreds of kelvin, the optimized carrier concentration may vary within an order of magnitude. Ga has shown potential in providing temperature-dependent carrier concentration due to its deep level of impurity states, which can ionize and release electrons at higher temperature. However, because of the low solubility, the decreasing of lattice thermal conductivity in the Ga-doped PbTe system is constrained. In this study, monovalent I is introduced, which leads to the solubility of Ga in PbTe reaching 5% and tunes the carrier concentration in PbTe simultaneously. An enhanced maximum PF of 21 μW K–2 cm–1 and ultralow lattice thermal conductivity of 0.61 W m–1 K–1 are attained because of the incorporation of Ga, which together enable an enhanced peak zT of 1.2, an average value of zT to 0.61, and a thermoelectric conversion efficiency η of 9.3% for the Pb0.95Ga0.05Te0.995I0.005 sample.
研究领域:
材料科学
·
热电学
·
半导体物理
·
能量转换材料
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2023
·
IF 3.8
Jie Zheng,Yu Tang,Yujie Xiang,Yonggui Tao,Kaiyuan Shen,Lanxian Shen,Wen Ge,Peizhi Yang,Shukang Deng
β-Zn4Sb3 is a promising thermoelectric (TE) material, as it contains low-cost and environment-friendly elements. However, its application has long been limited due to the lower figure of merit (ZT), poor mechanical properties, and inferior thermodynamic stability. In this research, we successfully synthesized Na/Ga codoped β-Zn4Sb3 with high thermoelectric performance and stability. The power factor (PF) value of the Ga-doped sample is significantly improved by optimizing carrier concentration, the maximum value of 2.28 × 10–3 W m–1 K–2 is obtained at 690 K, and the maximum ZT reaches 1.73 at 690 K for the Zn4.1Sb3(NaCl)7Ga0.12 sample. Moreover, the TG-DSC and oxidation resistance tests show that Na and Ga codoped β-Zn4Sb3 possess good stability. This work provides an attractive method for improving the thermoelectric properties and stability of β-Zn4Sb3 through diatomic doping.
研究领域:
材料科学
·
热电学
·
固态化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Binyu Lu,Liuyi Hu,Wenkui Zhang,Jun Zhang,Yang Xia,Yongping Gan,Xinping He,Xinhui Xia,Ruyi Fang,Hui Huang
Construction of quasi-solid-state lithium metal batteries (LMBs) by in situ polymerization is considered a key strategy for the next generation of energy storage systems with high specific energy and safety. Poly(1,3-dioxolane) (PDOL)-based electrolytes have attracted wide attention among researchers, benefiting from the low cost and high ionic conductivity. However, interfacial deterioration and uncontrollable growth of lithium dendrites easily appeared in LMBs due to the high reactivity of lithium metal, resulting in the failure of LMBs. In this work, a strategy is developed of using Ga(OTF)3 as the initiator to obtain a PDOL-based gel electrolyte (GaPD). In addition, a hybrid stable solid electrolyte interphase (SEI) of lithium fluoride/Li2O/Li–Ga alloys is observed on the surface of lithium metal. Combined with density functional theory calculations, the hybrid SEI shows high affinity toward Li+, indicating that a uniform deposition of Li+ could be achieved. Therefore, the Li/GaPD/Li cell operates stably for 1600 h at room temperature. In addition, the LiFePO4/GaPD/Li cell retains a capacity retention rate of 90.2% over 200 cycles at 1 C. This work provides a reference for the practical application of in situ polymerization technology in high-performance and safe LMBs.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
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DOI
高影响因子
FUEL
·
2026
·
IF 7.8
Kaixuan Bian,Lili Feng,Yongyan Yan,Jiawei Geng,Yue Zhang,Mengyang Sun
This study systematically investigated the enrichment behavior, occurrence modes, and speciation evolution of critical metals—indium (In), lithium (Li), gallium (Ga), and rare earth elements with yttrium (REY)—during the combustion of Ningxia coal. Simulated combustion experiments were conducted over a temperature range of 500–900 °C, coupled with sequential chemical extraction procedure (SCEP), X-ray diffraction (XRD), and thermodynamic modeling (FactSage). Results indicate that these metals are significantly enriched in the ash, with In exhibiting the highest enrichment ratio (up to 23.64). Mineral phase transformations—especially the formation of hematite, anhydrite, quartz, and amorphous glass—govern the redistribution of the metals. For In, the primary host shifts from metal oxides at lower temperatures to sulfate and quartz phases at higher temperatures, while Li and Ga remain predominantly associated with aluminosilicate glass and sulfate phases. REY migrate from metal oxide carriers toward sulfate and quartz phases as temperature increases. Thermodynamic predictions further confirm the predominance of solid phases such as In 2 O 3 , LiAlSi 4 O 10 , and Ga 2 O 3 under the investigated combustion conditions. These findings provide critical insights into optimizing the recovery of critical metals from coal fly ash, supporting its high-value utilization and sustainable resource strategies.
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Xiaoxia Ye,Feiyang Wang,Juan Liu,Yifan Liu,Yuancai Lv,Chunxiang Lin,Liang Song,Minghua Liu,Ying Zhang,Jie Chen
Radioactive 137 Cs poses a severe threat in nuclear wastewater. Conventional powdered adsorbents suffer from poor recoverability and are ill-suited for large-scale continuous-flow operations. To address these limitations, a novel three-dimensional bulk ammonium phosphomolybdate-gelatin composite adsorbent (AMP@GA) was fabricated. Through this strategy, highly selective AMP particles were uniformly immobilized within a porous (92%) gelatin network. Rapid adsorption kinetics (reaching equilibrium within 30 min), a Langmuir-fitted theoretical maximum Cs + adsorption capacity of 142.17 mg·g −1 at 45 °C, and acceptable chemical stability across a broad pH range (2.0-11.0) were exhibited by the resulting AMP@GA. Most significantly, the material demonstrated outstanding selectivity over competing ions ( K d = 7.48 × 10 4 mL·g −1 ). Its practical viability was confirmed by achieving over 88% removal efficiency in authentic seawater. Furthermore, in fixed-bed column tests, the material sustained continuous operation for 163.5 h. The mechanism is dominated by NH 4 + -Cs + ion exchange, assisted by electrostatic interactions. This work presents a scalable, easily recoverable bulk adsorbent that effectively helps address the engineering bottlenecks of traditional powdered materials.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Wei Wang,Jian Bao,Changhao Wang,Guoqiang He,Xin Wang,Diming Xu,Biaobing Jin,Zhongqi Shi,Moustafa Adel Darwish,Yawei Chen,Qixin Liang,Meirong Zhang,Di Zhou
The advancement of millimeter-wave communication desires the ceramic substrate with low permittivity ( ԑ r ) to meet the requirements of high transmission rates, low latency and wide bandwidth. However, the thermal conductivity of most low- ԑ r ceramics is too low to deal with heat dissipation in millimeter-wave applications. In this paper, we reported novel dielectric ceramics Li M SiO 4 ( M = Ga, Sc and Y) with excellent performances of low ԑ r (< 10) and high thermal conductivity (> 6 W mK −1 ). Their dielectric properties in both microwave and THz were investigated, where the LiGaSiO 4 ceramic achieved the lowest ԑ r of ∼5.2, the LiScSiO 4 ceramic presented extremely low loss ( Q × f ∼ 96,700 GHz, Q = 1/dielectric loss, f is resonant frequency), and the LiYSiO 4 ceramic showed a positive temperature coefficient of f (TCF ∼ +32 ppm °C −1 ). The distinct dielectric behavior was subsequently studied by structure-performance relationship in terms of M -site cations and bond parameters using bond valence theory, Phillips–Van Vechten–Levine chemical bond theory and so on. Moreover, a 36 GHz microstrip array antenna was designed and simulated using the LiGaSiO 4 ceramic substrate, obtaining high realized gain, high radiation efficiency and low sidelobe. The result demonstrated the great potential of LiMSiO 4 -type dielectric ceramics in millimeter-wave communications.
研究领域:
材料科学
·
电子工程
·
通信技术
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DOI
高影响因子
Catalysis Science & Technology
·
2019
·Vol. 9
·期 11
·2812-2827
·
IF 5.726
Suyao Liu,Yurong He,Huaike Zhang,Zhiqiang Chen,Enjing Lv,Jie Ren,Yifeng Yun,Xiaodong Wen,Yong-Wang Li
Ga-Doped ZSM-22 zeolites were synthesized successfully via a hydrothermal method by directly incorporating Ga species into the zeolite framework. It appeared that the as-prepared Ga-substituted zeolites possessed high crystallinity, uniform morphology and open pore structure. The XRD, FTIR, XPS as well as 71Ga and 29Si MAS NMR results confirmed the presence of Ga species in the framework of zeolites and the formation of the Ga–OH–Si group, thus leading to a significant decrease of Brønsted acidity because of the lower acidity of the Ga–OH–Si bridge hydroxyl compared to that of the Si–OH–Al group. These characteristics ensured that the Pt-loading [Al, Ga]-ZSM-22 catalyst exhibited lower cracking activity and higher selectivity (about 78.2% at 90.5% of conversion) in the n-dodecane isomerization than the parent Pt/ZSM-22 catalyst, due to the more balanced bifunctionality between acid sites and metal sites. DFT calculations revealed that Al and Ga incorporation was mostly prevalent at the T2, T3 and T4 sites, while Fe heteroatom substitution occurred equivalently in four sites. Bader charge analysis suggested that the acidity decreased in the order of Al-ZSM-22 > Ga-ZSM-22 > Fe-ZSM-22, and the cracking activity exhibited the order of Al-ZSM-22 ≫ Ga-ZSM-22 > Fe-ZSM-22. Therefore, it could be concluded that the isomerization was facilitated by the combination of the heteroatom location and the acidity strength. Remarkably, no significant decline of crystallinity and special surface area of Ga-doped zeolites was observed after the high temperature calcination, revealing higher stability of Ga than Fe in the zeolite framework.
研究领域:
催化化学
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材料科学
·
理论化学
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2018
·Vol. 86
·期 3
·699-710
·
IF 1.745
Guo Jiuli,Han Qiuwan,Zhong Siyuan,Zhu Baolin,Huang Weiping,Zhang Shoumin
The M-modified TiO 2 nanotubes (NTs) (M = Ce, Ga, Co, Y, 2.0 wt%) were synthesized by combining sol-gel method with hydrothermal treatment, based on which gold was loaded by the deposition–precipitation approach. These catalysts were loaded with 1.5 wt% gold and calcined at 300 °C, and their catalytic performance was compared with Au/TiO 2 NTs in CO oxidation. TEM results manifested Au/M-TiO 2 NTs (M = Ce, Ga, Co, Y) had smaller gold nanoparticles than Au/TiO 2 NTs. Patterns of XPS revealed the presence of the strong interaction between gold and support in Au/M-TiO 2 NTs (M = Ce, Ga, Co, Y). Ce 4+ , Ga 3+ , Co 2+ , and Y 3+ ions were present as CeO 2 , Ga 2 O 3 , CoO, and Y 2 O 3 in Au/M-TiO 2 NTs (M = Ce, Ga, Co, Y), respectively. Based on O 2 -TPD studies, Au/M-TiO 2 NTs (M = Ce, Ga, Co, Y) provided new O 2 adsorption sites for the adsorption and activation of oxygen in CO oxidation. M (M = Ce, Ga, Co, Y) modifying performed the positive effect on CO oxidation activity and Au/Y-TiO 2 NTs showed the highest activity among these catalysts. Additionally, Au/Y-TiO 2 NTs also performed excellent high-temperature stability. It was likely that the strong interaction between gold and support created the small size of gold nanoparticles, large O 2 adsorption and plenty of defects, thereby enhancing the catalytic activity of Au/M-TiO 2 NTs (M = Ce, Ga, Co, Y).
研究领域:
材料科学
·
催化化学
·
环境科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Peng Wang,Baoluo He,Xiaozhi Zhang,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
In this study, size-regulated MOFs (MZ) with high MBT loading were successfully synthesized by combining mercaptobenzothiazole (MBT), zinc salt, and 2-methylimidazole (2-MI). Subsequently, the MZ structure was utilized to encapsulate tannic acid-modified gallium-based liquid metal (GLM-TA), thereby acquiring a novel heterogeneous nanocomposite (GLM-TA@MZ). The results revealed that the as-prepared GLM-TA@MZ shows good antiwear and friction-reducing performance as an oil-based lubricant additive, the average friction coefficient was decreased to 0.091, and a wear volume was reduced to 0.95 × 104 μm3, which corresponds to a decrease of 52.3 and 97.2% as compared to base oil PAO. The excellent tribological properties of GLM-TA@MZ can be attributed to physical adsorption on the friction pair, followed by tribochemical reactions. As a result, a thick friction protection film (thickness of about 100 nm) containing Ga, Zn, and S elements was formed, which effectively reduced the contact area between the friction pairs, resulting in improved tribological performance. This study provides insights into the design of MOF-based nanocomposites for lubricating applications.
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Tingzhan Wang,Jingkun Chen,Jiaxuan Chen,Xuan Yao,Gang Chen,Zheng Jiao,Jing-Tai Zhao,Shuai Cheng,Xue-Chun Yang,Qianli Li
N-butanol gas is a common volatile organic compound (VOC) that can pose a threat to human health and pollute the atmospheric environment. However, the n-butanol gas sensors suffer from low response and selectivity. Herein, we synthesized the Ga-doped ZnO (ZOG) sensors by one-step hydrothermal treatment and subsequent calcination. The oxygen vacancies content of 1-ZOG has increased by 46 % compared to pure ZnO. Rich oxygen vacancies can increase the response signal of 1-ZOG to 174.78 in darkness for 100 ppm n-butanol, which is 2.4 times that of ZnO. Furthermore, the gas sensing performance of 1-ZOG is improved by light excitation. Under UV irradiation, the response of 1-ZOG sensor to 100 ppm n-butanol is 3.6 times that of pure ZnO, up to 636.81. Meanwhile, the response signal of 1-ZOG to n-butanol is at least 6.32 times that of other gases under UV light, showing ultra-high selectivity. This study proved that both Ga doped and photo-excited are effective strategies for improving the sensitivity and selectivity of ZnO based gas sensors.
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产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Siqi Wu,Rong Guo,Jianshan Chen,Runping Ye,Yeyan Qin,Hanying Wu,Shanshan Zong,Yang Liu,Yuangen Yao
Lack of high performance and stability catalysts remains a technical bottleneck for the industrialization of methyl nitrite (MN) carbonylation to dimethyl carbonate (DMC). Lewis acidity is crucial for catalytic performance in MN carbonylation reaction, but the regulation of Lewis acid sites and the effects of Lewis acid strength on catalytic performance have not been clarified. Thus, rational design of NaY zeolites with controllable acidity is an effective strategy to promote their catalytic performance. Herein, we substituted Ga for partial framework Al to produce a series of NaGaY-x (x = 0 ∼ 2) zeolites with different Ga content via direct hydrothermal method and applied in this reaction. The results showed that the Lewis acid strength increased upon an appropriate amount of Ga incorporation, thereby the electron density of Pd 2+ could be regulated. The optimal electron density of Pd 2+ promotes the carbon monoxide (CO) adsorption and activation, which contribute to the formation of the critical intermediate species *COOCH 3 . Eventually, the Ga-modified PdCu/NaY catalyst exhibited remarkable catalytic activity for MN carbonylation to DMC with the weight-time yields (WTY DMC ) of 1251 g·kg cat −1 ·h −1 , and the CO conversion to DMC (C CO ) of 69.2 % as well as the DMC selectivity based on CO (S DMC/CO ) up to 100 %. Our work paves the way to further understand the synergistic effect between Pd 2+ and Lewis acid, assists in the development of high-performance MN carbonylation catalysts.
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Cheng Huang,Kun Li,Hong Zhang,Wenwen Zhang,Yanlin Sun,Shujie Xing,Ying Shao,Jing Zhu,Yalan Chen,Long Chen
In this study, a solid adsorbent based on Chinese gallotannin and chitosan was generated and applied to adsorb rare and scattered metals, including Ge (Ⅳ), Ga (Ⅲ), and In (Ⅲ), from simulated zinc plant leachates. Fourier-transform infrared spectroscopy (FTIR) and solid state nuclear magnetic resonance (SSNMR) were performed to characterize the grafting way of Chinese gallotannin on the chitosan matrix. It was clearly showed that Chinese gallotannin was immobilized on the chitosan by Schiff-base condensation and phenol-formaldehyde reaction at the molar ratio of glutaraldehyde to tannin of 2:1. And the amount of chitosan amino groups was ten times that of tannin, with an initial pH of 4. The adsorption experiments showed that an appropriate increase in pH was more beneficial to enhance the adsorption capacity of immobilized Chinese gallotannin (ICGT). At a temperature exceeding 30 °C, the immobilized tannin became less sensitive to temperature. Adsorption kinetics studies showed that the adsorption of the three scattered metals by ICGT followed a quasi-second-order kinetic equation , with chemisorption as the mechanism. The adsorption isotherm was well fitted by the Langmuir model, indicating uniform adsorption sites on the surface of ICGT. The adsorption capacities of Ge (Ⅳ), Ga (Ⅲ), and In (Ⅲ) in solution by the adsorption model of monolayer were 61.39 mg/g, 63.82 mg/g, and 59.92 mg/g, respectively. Mechanical property and stability tests showed that ICGT had good resistance to harsh adsorption conditions of scattered metal ions .
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DOI
高影响因子
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