Nano Research
·
2024
·
IF 9.5
Song Kai-Zheng,He Xiao-Hang,Chen Zhe-Yong,Tang Ge,Huang Jin-Zhao,Jiang Feng-Lei
Environment-friendly indium phosphide (InP)-based quantum dots (QDs) with efficient red-emitting properties are sufficiently needed to satisfy the requirement of burgeoning display and lighting technology. Currently, the syntheses of InP QDs using tris(trimethylsilyl)phosphine as the precursor are highly toxic and expensive. Herein, we successfully introduced gallium (Ga) ions into tris(dimethylamino)phosphine-based red InP cores through thermally-promoted cation exchange, and the obtained Ga-doped InP cores exhibited significantly increased photoluminescence quantum yields (PLQY) of up to 26%. The existence of Ga was directly confirmed by energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy, and the functions of Ga were systematically studied. After subsequent coating of Ga-doped InP cores with ZnSeS and ZnS shells, the resulting Ga-InP/ZnSeS/ZnS QDs achieved a high PLQY of 62% with an emission maximum at 640 nm. In contrast, without Ga-doping, the PLQY only attained 36% using the same synthetic approach. This indicated an approximate 1.7-fold increase in PLQY. The enhancement of photoluminescence was related to the Ga 3+ , as it not only passivated surface defects of InP cores but also reduced core-shell interface stress. The Ga-InP/ZnSeS/ZnS QDs exhibited good stability towards heat treatment and ultraviolet (UV) irradiation. Moreover, the red light-emitting diode (LED) based on Ga-InP/ZnSeS/ZnS QDs performed well in a wide injected current range of 2 to 200 mA, with a maximum power efficiency of 0.68 lm/W. This work showcases Ga-doping through cation exchange as a promising strategy for enhancing the efficiency of InP-based red emitters.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Li Ding,Xuepeng Wang,Shanxin Yang,Wenda Xu,Yongde Yan,Yun Xue,Fuqiu Ma
In order to reveal the extraction mechanism of Nd on Ga-Al alloy electrode, the electrode reactions and alloy formation between Nd(III), Ga(III) and Al(III) ions in different molten salt systems were studied by multiple electrochemical methods. The cyclic voltammetry curves measured in melts with different concentrations confirmed that only three intermetallic compounds were formed in both Ga-Nd and Al-Nd systems. The preferential interaction of Nd with Ga in Ga-Al-Nd ternary system was further verified by cyclic voltammetry curves with varying potential window. In particular, the co-reduction process of three ions was gradually determined by the comparison of electrochemical behaviour in different melts. In addition, the interfacial reaction of Nd(III) ion on liquid Ga-Al alloy cathode was investigated, and the corresponding exchange current densities were measured through galvanostatic pulse (0.0049, 0.0047, 0.0056 and 0.0055 A cm −2 ) and Tafel method (0.0029 A cm −2 ).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Yihua Yue,Jian Tian,Jiechao Ma,Shui Yang,Wen Li,Jiale Huang,Qingbiao Li,Guowu Zhan
Herein, Ga-ZnZrO x &ZSM-5 bifunctional catalysts were designed for CO 2 thermal hydrogenation to aromatics, particularly, aiming to enhance the selectivity of high-value BTX ( i.e. , benzene, toluene, and xylene). It was evident that the exterior surface properties and acidity of ZSM-5 can be effectively tailored by in-situ silicon deposition originating from the rice husk template. Catalytic performance assessments demonstrate an optimized catalyst achieving 88.1 % aromatics selectivity (exclusive CO) in a single pass, with a notable 45.2 % BTX selectivity within total aromatics and a low CO selectivity of 23.6 %. This superior performance is attributed to the in-situ silicon deposition on ZSM-5 during one-pot synthesis and the optimized spacing between Ga-ZnZrO x and ZSM-5 facilitated by the rice husk platform. Furthermore, in-situ DRIFTS analysis identifies key reaction intermediates. This study offers an effective strategy for tuning zeolite acidity using rice husks, while modulating metal oxide-zeolite proximity on the bio-SiO 2 platform, thus boosting CO 2 conversion to aromatics.
研究领域:
催化
·
化学工程
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2018
·
IF 4.432
Meiyao Yang,Yingying Li,Wei Wang,Zhi Yuan,Yu Li
We report herein the development of a novel cellular cross-linker further employed in the construction of hepatocellular spheroids based on multivalent strategy. The linker structure consists of a glycyrrhetinic acid derivative (GA-N(CH3)2) modified alginate (ALG). GA-N(CH3)2 is selected as the recognition ligand due to its high affinity toward hepatocyte, whereas ALG represents the linear backbone accounting for its good biocompatibility and flexible structure. These features endow the cellular cross-linker with the ability to flexibly interact with the cell through multiple binding sites, providing superior binding force between the cell and cross-linker, and subsequently rapidly combining multiple cells into cellular spheroids.
研究领域:
生物材料
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组织工程
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细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Plant Science
·
2022
·
IF 6.627
Zhao Lu,Song Zhongbang,Wang Bingwu,Gao Yulong,Shi Junli,Sui Xueyi,Chen Xuejun,Zhang Yihan,Li Yongping
Proanthocyanidins (PAs) are important phenolic compounds and PA biosynthesis is regulated by a ternary MBW complex consisting of a R2R3-MYB regulator, a bHLH factor and a WDR protein. In this study, a tobacco R2R3-MYB factor NtMYB330 was characterized as the PA-specific regulator in which the PA biosynthesis was promoted in the flowers of NtMYB330-overexpressing lines while decreased in the flowers of ntmyb330 mutants. NtMYB330 can interact with flavonoid-related bHLH partner NtAn1b and WDR protein NtAn11-1, and the NtMYB330-NtAn1b complex is required to achieve strong transcriptional activation of the PA-related structural genes NtDFR1, NtANS1, NtLAR1 and NtANR1. Our data reveal that NtMYB330 regulates PA biosynthesis in seeds and affects seed germination, in which NtMYB330-overexpressing lines showed higher PA accumulations in seed coats and inhibited germination, while ntmyb330 mutants had reduced seed coat PAs and improved germination. NtMYB330 affects seed germination possibly through two mechanisms: modulating seed coat PAs to affect coat-imposed dormancy. In addition, NtMYB330 regulates the expressions of abscisic acid (ABA) and gibberellin acid (GA) signaling-related genes, affecting ABA-GA crosstalk and seed germination. This study reveals that NtMYB330 specifically regulates PA biosynthesis via formation of the MBW complex in tobacco flowers and affects germination through adjustment of PA concentrations and ABA/GA signaling in tobacco seeds.
研究领域:
植物分子生物学
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转录调控
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种子生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 58
·121908-121914
·
IF 5.8
Zhang Dong-Chi,Ullah Abid,Tian Peng,Yu Xiao-Zhang
Root architecture is the temporal and spatial configuration of root system in the heterogeneous matrix of soil that is prone to chemical stresses. Gallium (Ga) is among the emerging chemical pollutants that are mostly associated with high-tech industries, specifically associated with semiconductors. In view of its potential risk and increasing distribution in the environment, this study was designed to evaluate the inhibition rate, Ga distribution in different tissues, and root architecture of rice seedlings under different concentrations of Ga. We observed that 2.59, 46.7, and 168.2 mg Ga/L were minimum (EC 20 ), medium (EC 50 ), and maximum (EC 75 ) effective concentrations for rice plants that corresponded to the 20, 50, and 75% inhibition on the relative growth rate, respectively. Distribution of Ga in rice tissues showed that accumulation of Ga was much higher in roots than shoots of rice seedlings, and it increased with an increase in Ga doses. Evan blue staining technique reveals that the number of damaged/dead cell was dose-dependent on Ga. Moreover, several traits associated with root system architecture demonstrating that rice root system architecture altered in response to Ga stress. Collectively, the results reveal that Ga exposure inhibited the growth and development of rice plants. This study will enhance our understanding that how different concentrations of Ga in the environment can affect plants; however, more comprehensive studies are essential to further determine plant response against Ga stress.
研究领域:
植物生理学
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环境毒理学
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土壤生物学
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重金属污染
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作物科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Lei Wang,Xudong Liu,Mu Zhang,Xiaoguo Bi,Zhixin Ma,Jinsheng Li,Jialin Chen,Xudong Sun
(Nb 0.5 Ga 0.5 ) x Ti 1−x O 2 (x = 0.05%,0.2%,0.5%,1%,5%) single crystals were prepared by Verneuil method. Even if the doping amount is 0.05%, the dielectric permittivity (ε′) is obviously higher than that of pure rutile TiO 2 (260), reaching more than 10 4 . As the doping amount x increase, the ε′ increases, and reaches the maximum value when x = 5%, but the dielectric loss increases correspondingly. The best dielectric performance (ε′=1.0 ×10 5 , tanδ=0.034 under 1 kHz) is obtained when the doping amount is 0.5%. Even at 10 6 Hz, the dielectric loss is only 0.019, much lower than the reported ceramic samples. This may be due to the fact crystalline materials can effectively reduce defects such as grain boundary, second phase, porosity and segregation. The dielectric spectra, impedance analysis, XPS and DC bias results show that the colossal permittivity (CP) properties could be attributed to EPDD polarization. With the increase of doping concentration (>1%), the hopping polarization occurs, resulting in a slight increase in dielectric loss. These results indicate that TiO 2 crystal materials with lower dielectric loss are good candidates for dielectric materials. Taking TiO 2 crystal as the research object, we can have a clearer understanding of the origin of TiO 2 dielectric properties and the influence of doping ion content, which is of great significance to the development of TiO 2 -based dielectric materials.
研究领域:
材料科学
·
介电材料
·
晶体生长
·
固体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL SCIENCES
·
2026
·Vol. 138
·期 4
·118
·
IF 1.8
Xu Guohao
A Ga-substituted ZSM-5 zeolite was successfully synthesized via a hydrothermal synthesis method, and its catalytic performance and physicochemical properties in propane aromatization were systematically investigated. Comprehensive characterizations including XRD, SEM, ICP-AES, IR, NH 3 -TPD, XPS, N 2 adsorption-desorption and TG analyses revealed that Ga species exhibited the lower tendency to incorporate into the ZSM-5 zeolite framework compared to Al species. The gallium-doped aluminosilicate (GaAlZ5), possessing the largest specific surface area and highest acid content, demonstrated a superior aromatic selectivity of 85.6% and propane conversion of 66.1%, which exceeded those of gallosilicate (GaSiZ5) by 22.5% and 5.6%, respectively. Moreover, the intergranular mesopores in GaAlZ5 enhanced the mass-transfer rate of aromatics, effectively suppressed the formation of coke precursors, and endowed the catalyst with excellent long-term stability as well as regeneration stability. This work provides a facile synthesis strategy and systematic theoretical support for the design of high-stability and high-selectivity Ga-based zeolite catalysts for propane aromatization. Graphical abstract This graphical abstract illustrates the bifunctional tandem pathway of propane aromatization, where propane is activated to propylene via dehydrogenation over Ga-based Lewis acid sites, followed by aromatization under the synergy of Brønsted and Lewis acid sites. This work reports a Ga-modified ZSM-5 zeolite (GaAlZ5) with optimized acid properties and pore structure, which delivers 66.1% propane conversion and 85.6% aromatics selectivity with excellent recyclability, providing a facile approach for light alkane valorization.
✓ 已验证
DOI
高影响因子
ANNALS OF BOTANY
·
2024
·
IF 3.6
Guo Huanhuan,Li Shiqin,Liu Yong,Yang Qinsong
Background and AimsChinese pistachio (Pistacia chinensis Bunge), an important horticultural plant species, holds great ornamental value with beautiful leaves and fruits. Seedling propagation of this tree species is restricted by its erratic seed germination, however, the germination mechanism is ambiguous yet. The aim of this study was to figure out the germination mechanism from the novel perspective based on the multi-omics data.MethodsThe multi-omics technique combined with hormone content measurement was first applied in seed germination of Chinese pistachio.Key ResultsDue to the great accumulation during seed germination, catechin stood out from the identified metabolites by broadly targeted metabolomic analysis. Exogenous catechin of 10 mg/L significantly improved the germination of Chinese pistachio seeds. An interesting result of hormone analysis showed that the improving effect of catechin could be attributed to increase of the gibberellic acid 3 (GA3) content rather than decrease of the abscisic acid (ABA) content before germination. The paclobutrazol (PAC, a GA biosynthesis inhibitor) and PAC + catechin treatments also showed that the promoting effect of catechin on seed germination depends on GA biosynthesis. Transcriptome analysis and qRT‒PCR further revealed that catechin induced the expression of PcGA20ox5 to activate GA biosynthesis. Several transcription factors were induced by catechin and GA treatments, such as TCP, bZIP and C3H, which may play an important regulatory role in GA biosynthesis in a catechin-mediated way.ConclusionsCatechin promotes seed germination via GA biosynthesis in Chinese pistachios. This study proposes a novel mechanism by which catechin promotes seed germination via the GA pathway, which provides new insight into a comprehensive understanding of seed dormancy and germination.
研究领域:
植物学
·
植物生理学
·
分子生物学
·
园艺学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2020
·
IF 5.578
Bing Xu,Minghui Tan,Xuemei Wu,Hailun Geng,Faen Song,Qingxiang Ma,Chunhui Luan,Guohui Yang,Yisheng Tan
Dehydroaromatization of propane to high value-added aromatics, especially benzene, toluene and xylene (BTX), has attracted widespread attention. Many works have been done to improve the catalytic performance of gallium loaded HZSM-5 catalysts. However, there were few reports focused on reducing the cracked by-products, such as methane and ethylene, derived from propane cracking reaction on external Brønsted acidic sites of zeolite. Herein, chemical liquid deposition (CLD) method was adopted to passivate the external strong Brønsted acid of Ga/HZSM-5, aiming to increase the most value-added BTX production by suppressing the undesired propane cracking reaction. The content of deposited SiO 2 on the external surface of zeolite was tunable by varying the amount of liquid deposition reagent and duration time of CLD process. The results showed that an appropriate content of SiO 2 on external surface of catalyst was beneficial to disable the external strong Brønsted acid sites. Due to depressing the undesired propane cracking reaction, BTX selectivity of 55% with propane conversion of 49% was achieved on Ga/Z5-4Si catalyst, higher than those of Ga/HZSM-5. Otherwise, prolonging the duration time of CLD process narrowed the micropore mouth size of zeolite, which could enhance the shape selective effect of Ga/ZSM-5 to increase the proportion of para-xylene in total xylene products.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Dan Sun,Xiaonian Tang,Shuo Li,Li Liu
Pure and Ga-doped 3D ordered porous SnO2 (3DOPS) nanomaterials were synthesized by a simple template method, and SnO2 nanoparticles (NPs) were prepared by an annealing process. The presence of Ga in 3DOPS and the structure of 3DOPS were determined by X-ray powder diffraction (XRD), energy-dispersive spectroscopy (EDS), X-ray photoelectric spectroscopy (XPS), and scanning electron microscopy (SEM). The surface areas of the porous structure were measured by the BET method using a middle-high pressure physical gas adsorption instrument. Due to the porous structure and dopant effects on the SnO2 nanomaterials, 3 at % Ga-doped 3DOPS has the largest specific surface area (61.58 m2/g) compared with pure particle tin dioxide (38.60 m2/g). The 3 at % Ga-doped 3DOPS-based sensor exhibits a lower detection limit (2/0.1 ppm) and improved sensitivity (55/50 ppm) to formaldehyde (HCHO) at a low temperature (210 °C), and the response is 6.5 times higher than that of the pure SnO2 NP-based sensor (8.5/50 ppm). However, the response of pure 3DOPS (18/50 ppm) is only twice as high as that of the pure SnO2 NP-based sensor. In addition, the 3.0 at % Ga-doped level of the SnO2 sensor showed a fast response time (2 s) and excellent selectivity. The high sensitivity of SnO2 can be explained by the increase in the specific surface area and porosity brought by the 3D ordered porous structure, and the modified suface structure by precious metals.
研究领域:
材料科学
·
纳米技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ying Zhang,Zhen Xin Hui,Hong Yu Zhou,Shi Feng Zai,Zi Wen,Jian Chen Li,Chun Cheng Yang,Qing Jiang
Design and fabrication of high-efficiency electrocatalysts for hydrogen evolution reaction (HER) in alkaline conditions are crucial to reduce energy losses in water-alkali and chlorine-alkali industry yet challenging. Herein, density functional theory simulations indicate that the Ga dopant could systematically enhance the HER activity of CoP by improving the H 2 O adsorption, weakening OH adsorption, and optimizing the H adsorption/desorption. Aided by these findings, we successfully prepared ultrathin Ga-doped CoP nanosheets (Ga-CoP NSs) self-supported electrode via electrodeposition followed by the phosphorization treatment for the first time. Ga-CoP NSs delivers superior HER electrocatalytic activities with a very low overpotential of 44 mV to drive a current density of 10 mA cm −2 , outperforming almost all non-noble metal based HER electrocatalysts in alkaline media.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）