BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Bi-Yun Fang,Cheng Li,Yuan-Yang Song,Fang Tan,Yuan-Cheng Cao,Yuan-Di Zhao
Graphene quantum dot (GQD) has been attractive in analytical science field due to its low toxicity, stable photoluminescence . Herein, nitrogen-doped GQD (N-GQD) was prepared by a facile solvothermal treatment of GO using dimethylformamide, and exhibited a green emission with 23.1% quantum yield . The N-GQD probe showed a selective and sensitive fluorescence enhancement response to Al 3+ , the mechanism might be the formation of a complex between Al 3+ and N-GQD constrained the photo-induced electron transfer (PET) process of N-GQD itself. With Benesi-Hildebrand equation, the binding constant and molar ratio between N-GQD and Al 3+ was calculated to be 4.6 × 10 4 L mol −1 and 1:1 respectively. The p K a value of N-GQD was also determined to be 4.4 by capillary electrophoresis . In pH 4.0 PBS solution, there was a good linear relation between the fluorescence intensity and the logarithm of concentration of Al 3+ in the range of 2.5–75 μmol L −1 , the limit of detection (3σ) was 1.3 μmol L −1 . This “Off - On” fluorescence method had been applied to accurate quantification of aluminum in hydrotalcite tablets. What's more, the fluorescence switch property of N-GQD was explored by alternate addition of Al 3+ and EDTA. The probe was also utilized for detection Al 3+ in living cells due to its excellent biocompatibility.
研究领域:
分析化学
·
生物医学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2013
·
IF 2.297
Qing Song,Qiu-Yue Kang,Sa-Ying Li,Qiu-Yan Yu,Zhi-Hong Liu
Three isotypic polyborate cluster compounds for Na 5 [AlB 24 O 34 (OH) 12 ]·5.5H 2 O, Na 5 [CrB 24 O 34 (OH) 12 ]·5H 2 O and Na 5 [GaB 24 O 34 (OH) 12 ]·3H 2 O have been synthesized and characterized by EDS, XRD, FT-IR, TG techniques and chemical analysis. The molar enthalpies of solution of Na 5 [AlB 24 O 34 (OH) 12 ]·5.5H 2 O (s) and Na 5 [CrB 24 O 34 (OH) 12 ]·5H 2 O (s) in 1 mol · dm −3 HCl (aq) were measured to be (58.27 ± 0.15) kJ · mol −1 and (130.99 ± 0.33) kJ · mol −1 , respectively. The molar enthalpies of solution of AlCl 3 ·6H 2 O (s) and CrCl 3 ·6H 2 O (s) in (HCl + H 3 BO 3 + NaCl) (aq) were also measured, respectively. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol · dm −3 HCl (aq), together with the standard molar enthalpies of formation for AlCl 3 ·6H 2 O (s)/CrCl 3 ·6H 2 O (s), NaCl(s), H 3 BO 3 (s), HCl (aq) and H 2 O (l), the standard molar enthalpies of formation of −(21316.0 ± 19.3) kJ · mol −1 for Na 5 [CrB 24 O 34 (OH) 12 ]·5H 2 O (s) and −(21669.7 ± 19.3) kJ · mol −1 for Na 5 [AlB 24 O 34 (OH) 12 ]·5.5H 2 O (s) at T = 298.15 K were obtained on the basis of the appropriate thermochemical cycles. The molar enthalpy of formation of Na 5 [GaB 24 O 34 (OH) 12 )]·3H 2 O was estimated as −20662.9 kJ · mol −1 by using a group contribution method on the basis of these measured results.
研究领域:
无机化学
·
物理化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jun Yang,Yihua Xu,Bingqing Fu,Hongyan Li,Fangtao Xiong,Huifang Zhao,Lizheng Sha,Yinchao Xu,Daliang Guo,Jing Li
In order to address the urgent demand for sustainable thermal insulation materials, a biomass-based sodium alginate (SA) aerogel was developed through in situ dual crosslinking with polyvinyl alcohol (PVA) and Zn 2+ /Al 3+ in this work. The SAP-Al 0.15 aerogel demonstrated exceptional multifunctionality with ultra-low density (2.37 ×10 −2 g·cm −3 ), excellent mechanical strength (366.2 kPa longitudinal, 846.7 kPa transverse), and superior flame retardancy (LOI=30.4 % and UL-94 V-0 rating). Hierarchical pore architecture enabled remarkable thermal insulation (ΔT = 55 ℃ at 80 ℃ heating) and weight-bearing capacity (over 3300 times of self-weight). Systematic characterization revealed that Al³ ⁺ crosslinking preferentially enhanced network densification through strong carboxyl coordination, achieving 35.4 % char residue with protective Al 2 O 3 layers. Compared to SAP-Zn 0.15 , Al 3+ crosslinking increased compressive modulus by 377 % while maintaining 97.6 % porosity. This EDTA-mediated in situ dual crosslinking strategy successfully resolved the mechanical-thermal-flame retardancy comprehen-sive improvement in biomass aerogels, positioning SAP-Al 0.15 as an eco-friendly alternative to conventional insulation foams for architectural heat insulation. This work provided fundamental insights into the structure-property relationships of biopolymer-based aerogels, offering a sustainable materials platform for energy-efficient building applications.
研究领域:
材料科学
·
高分子科学
·
热能工程
·
消防安全工程
·
可持续技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Yushan Yang,Xiaofen Wang,Shunzhong Luo,Xiaoyong Yang,Jiang Ma
[Cs x Ba y ][(Al 3+ ,Ti 3+ ) 2 y + x Ti 4+ 8-2 y - x ]O 16 (0.4 ≤ x , y ≤ 0.8) ceramics were synthesized to investigate the substitution effects of Ba 2+ for Cs + on the stability of hollandite-ceramic waste forms. It was found that the substitution of Ba 2+ for Cs + in the (Cs,Ba)-hollandite system does not cause substantial variation in the crystallographic phase and microstructure. The normalized release rates of Cs and Ba at 90 °C in deionized water were < 0.005 g m −2 d −1 after 28 days. These results indicate that hollandite ceramics are an ideal host for permanent radioactive caesium disposal.
研究领域:
材料科学
·
核废料管理
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2024
·
IF 4.8
Xue Zhou,Yueying Chu,Chao Wang,Qiang Wang,Min Hu,Jun Xu,Feng Deng
γ-Al2O3 is a crucial catalyst widely used in industrial alcohol dehydration processes. However, the specific nature of its active sites has remained unclear. In this study, we utilize two-dimensional heteronuclear correlation solid-state nuclear magnetic resonance and density functional theory calculations to uncover the active Al sites on the surface of γ-Al2O3 that facilitate ethanol dehydration. We show the formation of stable pentacoordinated AlV–ethanol complexes upon the adsorption of ethanol on the tetracoordinated AlIV sites. This interaction significantly enhances synergy with adjacent AlV–OH sites, resulting in a marked reduction of the activation energy barrier for ethene production. Furthermore, we reveal an interchange between AlIV and AlV–OH species, allowing hexacoordinated AlVI–OH sites to participate in the dehydration pathway through the migration of ethanol between these coordination sites.
研究领域:
催化化学
·
物理化学
·
固态核磁共振光谱
·
密度泛函理论
·
表面化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jiangbo Guo,Yajuan Li,Yajun Zhang,Jujie Ren,Xudong Yu,Xinhua Cao
Coordination-driven self-assembly with controllable properties has attracted increasing interest because of its potential in biological events and material science. Herein, we report on the remote, instant, and switchable control of competitive coordination interactions via ultrasound and heat stimuli in a hydrogel network. Configurational coordination changes result in the transformation of blue-emissive and opaque Al3+–amide aggregations to yellow–green-emissive and transparent Al3+–terpyridine aggregations. Interestingly, circularly polarized luminescence “off–on” switches of the metallo-supramolecular assembly are also created by these configuration changes. Additionally, the impact of the stoichiometric ratio of Al3+ and LysTPY on the assembly is also studied in detail. With a higher content of Al3+, the hydrogel with branched and abundant junctions exhibited robust, self-healing, and self-supporting properties. This in-depth understanding of the coordination interaction adjustment will afford new insights into the preparation of stimuli-responsive metallogels.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Binbin He,Yuanzhi Zhu,Delong Xie,Yunxiang Nie,Yi Mei
With the decrease in the phosphate rock grade, the minor element ratios (MER) [(Fe2O3 wt% + Al2O3 wt% + MgO wt%)/P2O5 wt%] of wet-process phosphoric acid (WPA) exhibits a linear upward trend. This can lead to a huge challenge for the high-quality production of feed calcium phosphate salt (FCPS). In the present study, we proposed a novel and economical strategy to precipitate Al3+ and Mg2+ via the formation of aluminofluoride complexes (NaMgAlF6·H2O) with the anhydrous sodium sulfate (Na2SO4) and hydrofluoric acid (HF) as precipitation agents. Because of the low solubility of the complexes in WPA, the removal efficiencies of Al3+ and Mg2+ ions could reach 99.5% and 64.8%, respectively. The maximum mass loss of P2O5 was less than 0.5%. The precipitates could be separated and converted into the HF and Na2SO4 for reuse, thus further decreasing the cost of WPA purification.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Tianqi Liu,Xuejuan Wan,Yunsheng Dong,Weibin Li,Lisi Wu,Hang Pei,Youwei Yao
In this study, a facile water-soluble fluorescence sensor 2-((2-hydroxybenzylidene)-amino)-2-(hydroxymethyl)propane-1,3-diol (ST) was synthesized via one-step reaction, and its fluorescence sensing performance for Al 3 + both in aqueous solution and on paper substrate was evaluated. The results showed that ST exhibited an specific fluorescence “turn-on” response to Al 3 + over other cations in aqueous solution as well as on the test paper. The limit of detection was found to be 3.2 × 10 − 7 M, which revealed that the obtained Schiff-base based fluorescence chemosensor ST possessed a great potential for the rapid, quantitative and qualitative detection of Al 3 + .
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2021
·Vol. 38
·期 11
·2100201
·
IF 3.31
Jinxia Xu,Yueyan Zang,Fanyong Yan,Jingru Sun,Yuyang Zhang,Chunhui Yi
Carbon dots (CDs) are emerging photoluminescent materials with excellent optical properties. However, the lack of active sites in primitive CDs has limited their development applications. Herein, functionalized carbon dots (Z-CDs) are successfully prepared by surface modification of CDs with mono (6-amino-6-deoxy) cyclodextrin (β-CD). The introduction of β-CD increases the spatial potential resistance between CDs, which effectively reduces the self-quenching effect. Moreover, the conjugated domains of Z-CDs are expanded, which improves the optical properties with a quantum yield of 48.74%. Z-CDs are able to be used in the sequential detection of morin and Al 3+ , and the fluorescence mechanisms are confirmed to be internal filtration effect and fluorescence resonance energy transfer, respectively. The limits of detection are 0.817 and 0.231 × 10 −6 m . This study not only provides an idea to solve the problem of self-quenching of CDs but also enriches the detection means of flavonoids and ions, which is expected to be applied to biosensing and environmental monitoring.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2021
·Vol. 11
·期 39
·2101514
·
IF 29.368
Wending Pan,Yan Zhao,Jianjun Mao,Yifei Wang,Xiaolong Zhao,Kee Wah Leong,Shijing Luo,Xinhua Liu,Huizhi Wang,Jin Xuan,Shichun Yang,Yue Chen,Dennis Y. C. Leung
The aqueous Al-ion battery has achieved great progress in recent years. It now shows comparable performance to that of even non-aqueous Al-ion batteries. However, it also shows relatively low energy output and there is limited general understanding of the mechanism behind this restriction to its practical application. Thus, the development of a high-performance cathode material is in great demand. Herein, a high-capacity single-walled carbon nanotube (SWCNT) is developed as a cathode for the water-in-salt electrolyte-based aqueous Al-ion battery, which provides an ultra-high specific capacity of 790 mAh g –1 ( based on the mass of SWCNT ) at a high current density of 5 A g –1 even after 1000 cycles. Moreover, the SWCNT/Al battery shows a complicated multi-ion intercalation mechanism, where AlCl 4 – , Cl – , Al 3+ , and H + can function at the same time, improving the battery output. Beyond recently revealed H + and metal ion co-intercalation, the Cl-assisted intercalation of Al 3+ ions mechanism is also studied by experimental characterization and modeling for the first time, which significantly boosts the Al 3+ storage capacity. This multi-ion intercalation mechanism combines the high-voltage anion deintercalation and the high-capacity cation intercalation, and thus, benefits the development and application of high-energy Al-ion batteries in the future.
研究领域:
能量存储与转换
·
电化学
·
材料科学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Kaidi Gao,Qiao Hu,Yu Xia,Guangming Han,Jianfeng Yao
NASICON-type Na 3 V 2 (PO 4 ) 3 (NVP) has been identified as an ideal cathode for sodium-ion batteries (SIBs) because of its ultra-fast Na + diffusion and very stable structure. However, it still suffers from significant problems such as a low operating voltage plateau (3.4 V, vs. Na + /Na), inferior electronic conductivity and unsatisfactory energy density (370 Wh kg −1 ), thereby hampering the commercialization of NVP. Herein, a series of Al 3+ /Ga 3+ co-doping Na 3 V 2 (PO 4 ) 3 cathodes were successfully prepared through a facile solid-state reaction process. The substitution of Al 3+ /Ga 3+ for V 3+ in Na 3 V 2–2x Al x Ga x (PO 4 ) 3 ( x = 0, 0.1 and 0.2) effectively activates the electrons outside of V and achieves an extra redox couple V 4+ /V 5+ for high-voltage (3.9 V, vs. Na + /Na) reactions. Moreover, the presence of Ga in this series of electrode materials increases the proportion of sp 2 -type carbon. The optimized Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 material possesses high ionic/electronic conductivity and superior electrochemical performance: the energy density is enhanced by approximately 13.1 % at 0.1 C (from 345.4 Wh kg −1 for NVP to 390.7 Wh kg −1 for Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 ), and the power density is increased by approximately 135 % at 30 C (from 2574 W kg −1 for NVP to 6039 W kg −1 for Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 ). Furthermore, Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 exhibits excellent cycling stability with 93.4 % capacity retention after 350 cycles at 1 C. Ex-situ XPS and electrochemistry investigations imply the high reversibility of the V 3+ /V 4+ /V 5+ redox reaction in Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 . This work proposes a novel strategy to modulate the electronic structure of NVP by co-doping with Al 3+ and Ga 3+ to achieve reversible multi-redox activity (V 3+ /V 4+ /V 5+ ) in NASICON-type NVP, thus providing a viable approach for advancing ultrafast high-energy sodium storage.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RESEARCH
·
2025
·
IF 3.4
Liu Jinlong
Traditional lignin-silver nanoparticle hydrogels are often limited by slow gelation (> 3 h), weak mechanical properties, and limited antibacterial efficacy. In this study, we introduce a novel approach by incorporating metal ions (Fe 3+ and Al 3+ ) into lignin-silver nanoparticle (AgNP) composites embedded in an acrylic acid (AA) matrix. This modification significantly enhances the hydrogel's multifunctionality. The presence of metal ions accelerates gelation, enabling rapid formation of highly crosslinked structures within seconds, a notable improvement over conventional lignin-based hydrogels, which typically exhibit slower gelation. Detailed characterization using SEM, FTIR, and XPS analyses reveals that metal ions interact with lignin moieties, inducing redox reactions and coordinating with functional groups, such as phenolic hydroxyl and carboxyl groups. The Fe 3+ -based hydrogel demonstrates potent antibacterial activity, driven by reactive oxygen species (ROS) generation (MIC = 1 mg/mL and MBC = 2 mg/mL against Escherichia coli and Staphylococcus aureus , respectively), while the Al 3+ -based hydrogel shows enhanced mechanical resilience, maintaining 95% recovery after compression. Compared to conventional lignin@AgNPs-AA hydrogels, both hydrogels exhibit remarkable multifunctional properties, including 2.5 × higher compressive strength, 90% DPPH radical scavenging activity, and improved stability. Mechanistic studies highlight distinct antibacterial pathways: Fe 3+ promotes oxidative stress through Fenton reactions, while Al 3 ⁺ disrupts bacterial membranes. This work establishes a rapid, metal-ion-catalyzed approach for the development of lignin-based hydrogels, addressing previous limitations and offering promising applications in wound healing, sensors, and environmental remediation. Graphical abstract
研究领域:
材料科学
·
生物医学工程
·
环境科学
✓ 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）