CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hongmin Dai,Xuan He,Xing Du,Weixin Li,Daheng Wang,Hui Chen,Wei Fang,Lei Zhao
Applying piezoelectric effect on modulating charge transport behavior was considered as one efficient strategy to make feasible charge separation in photocatalysts towards boosting hydrogen evolution performance. Here, with employing corona-poling treatment, SrTiO 3 is converted to be a piezoelectric component in the constructed type II NH 2 -MIL-125(Ti)/SrTiO 3 heterojunction . Since the piezoelectric field could tilt the band bending to a degree to be convenient for the charge transfer from SrTiO 3 to NH 2 -MIL-125(Ti), it is also favorable to offer additional active sites on SrTiO 3 to form dual reduction sites for the following piezo-photocatalytic reaction. Both the ameliorated surficial polarization and charge transfer trajectory in NH 2 -MIL-125(Ti)/SrTiO 3 type II heterojunction are devoted to the boosted hydrogen production rate for NH 2 -MIL-125(Ti)/SrTiO 3 -0.1 (NM/STO-0.1), that is up to 1562.3 μmol h −1 g −1 , 1.79 times higher than that of unpolarized NM/STO-0.1 (871.6 μmol h −1 g −1 ) and 2.35 times higher than that of NH 2 -MIL-125(Ti) (663.8 μmol h −1 g −1 ), respectively. This research reported initially the assistant of SrTiO 3 with piezoelectric feature for enhanced performance photocatalytic hydrogen evolution, which could be one prominent strategy to achieve the reasonable design of efficient photocatalytic system.
研究领域:
材料科学
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纳米技术
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催化
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能源材料
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产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Dandan Guo,Diya Zheng,Ding Zhou,Changlun Tong,Shaohua Huang
Lysine (Lys) is an essential nutrient that plays a crucial role in the growth and development of living organisms. Chiral analysis of Lys holds significant importance for ensuring the safety of food, pharmaceuticals, and health products. In this work, an achiral Zr-based metal organic frameworks (MOFs), UiO-66-NH 2 , was proposed as a fluorescent probe to achieve rapid response to l -lysine (L-Lys) in solution. Additionally, Zr 4+ in the skeleton of UiO-66-NH 2 framework exhibited different binding capacities towards Lys enantiomers, leading to distinct fluorescence responses for L-Lys and d -lysine (D-Lys). Leveraging these properties, the UiO-66-NH 2 probe enabled accurate determination of L-Lys concentrations in solution, as well as the enantiomeric excess (ee) values of Lys solutions. Notably, in the detection of Lys enantiomers, the achiral UiO-66-NH 2 acted as both a chiral selector and a fluorescent indicator, greatly improving the efficiency and stability of the detection system. The probable mechanism was further elucidated by pH titration experiments and density functional theory calculations. Additionally, the general applicability of this mechanism was validated by similar amino MOFs. The application of the UiO-66-NH 2 fluorescent probe in analysis of infant formula milk powders and liquid milk samples confirmed the reliability of the method. Moreover, the construction of fluorescence test paper by immobilizing UiO-66-NH 2 onto filler papers enabled the rapid identification of Lys enantiomers. Compared to previous fluorescent analyses of chiral amino acids assisted by additional metal ions, this study presented a novel approach and methodology that offers high efficiency, stability, reproducibility and reusability for the identification and detection of Lys enantiomers, highlighting the potential of the UiO-66-NH 2 fluorescent probe in advancing analytical techniques.
研究领域:
分析化学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 13
·e202303633
·
IF 1.9
Mingyan Chen,Wentao Wang,Xinkai Feng,Dehua Zhang,Yao Zhang,Yucheng Liu
Graphical This work describes the application of a highly efficient catalyst (NH 2 -UiO-66-Mo) to the catalytic oxidation desulfurization process. NH 2 -UiO-66-Mo can greatly improve the efficiency of oxidative desulfurization The optimum operating conditions of NH 2 -UiO-66-Mo are investigated through experiments, which prove the excellent performance of the catalyst, and the reaction mechanism is further studied through a series of characterizations. A highly efficient oxidative desulfurization composite catalyst NH 2 -Uio-66-Mo has been prepared and applied in the catalytic oxidative desulfurization. It was elucidated that Mo 6+ could increase the oxygen vacancies and active sites on the catalyst and increase the pore size of UiO-66. Meanwhile, the removal rate of dibenzothiophene (DBT) reached 99.2 % after 60 min under optimal conditions and remained above 90 % after 5 cycles, showing the composite catalyst's remarkable catalytic performance and satisfactory reusability NH 2 -UiO-66-Mo. In addition, kinetic studies revealed that the desulfurization process can present a pseudo-first-order kinetic process. The apparent activation energy was 10.6 kJ/mol. Finally, in combination with oxides, possible oxidation pathways were identified.
研究领域:
化学工程
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材料科学
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催化反应
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
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IF 4
Mengjiao Yu,Xiong-Fei Zhang,Siting Yang,Yunhua Bai,Zhongguo Wang,Jianfeng Yao
Developing functional catalysts with both Lewis and Brønsted acid sites is an essential task for achieving the direct conversion of glucose to 5-hydroxymethylfurfural (5-HMF), a process that is crucial for the sustainable production of renewable fuels and chemicals. In this work, a mixed-linker strategy is proposed to prepare defective MIL-53(Al)-NH 2 by introducing trifluoroacetic acid into the MIL-53(Al)-NH 2 synthesis process. The creation of defects facilitates the exposure and accessibility of Al 3+ centers, as well as changes the coordination environment within the MIL-53(Al)-NH 2 skeleton. Both the number of Lewis and Brønsted acid sites are boosted, which is beneficial for glucose activation and 5-HMF generation. Through optimizing the reaction conditions, a glucose conversion of 98.3 % with a 5-HMF yield of 59.3 % was achieved by using defective 6d-MIL-53(Al)-NH 2 in a biphasic tetrahydrofuran/H 2 O NaCl system. Moreover, the 6d-MIL-53(Al)-NH 2 catalyst showed excellent recyclability and reusability, with its catalytic efficiency maintained almost unchanged for consecutive 10 cycles. The catalytic mechanism was elucidated and the acidity of the Lewis and Brønsted acid was modulated by defect engineering to achieve exceptional performance.
研究领域:
化学工程
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催化科学
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可再生资源
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-9
·
IF 5.3
Li Rui,Que Wenzhong,Han Haiyan,Shi Honghui,Wang Rongfeng,Qiu Bin
IL-17 (interleukin-17) is a common proinflammatory cytokine and can be adopted as an important biomarker for several diseases; it is thus very necessary to design an effective method for monitoring IL-17. Herein, by preparing silver nanoparticles/graphdiyne (Ag/GDY) with simple electroless deposition as the sensing platform and methylene blue/UiO-66-NH 2 MOFs (MB/MOFs) as the signaling-amplifier, a highly efficient sandwich-like electrochemical immunosensing (SLEI) platform was designed for IL-17 detection. The superior electrical property, easy preparation, large surface area, and high stability of Ag/GDY make it a desirable substrate to immobilize primary antibody of IL-17. Meanwhile, the unique structure of UiO-66-NH 2 is beneficial to immobilize MB probe and secondary antibody. By optimizing experimental conditions, the MB current obtained at the as-designed SLEI platform increases along with IL-17 increase, and the related linearity is 1.0 pg mL −1 –1.0 ng mL −1 coupled with a low detection limit of 0.3 pg mL −1 . It is expected that the SLEI platform based on Ag/GDY and MB/MOFs shows some potential application for IL-17 detection. Graphical abstract
研究领域:
生物医学工程
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免疫学
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Yanghe Fu,Long Sun,Huan Yang,Lai Xu,Fumin Zhang,Weidong Zhu
The Ni-doped NH 2 -MIL-125(Ti) catalyst was developed for the photocatalytic aerobic oxidation of aromatic alcohols upon visible light irradiation. The results show that different aromatic alcohols can be effectively transformed to their corresponding aldehydes with almost absolute selectivity using O 2 as the oxidant over Ni-doped NH 2 -MIL-125(Ti) upon visible light irradiation. Compared with the parent catalyst NH 2 -MIL-125(Ti), Ni-doped NH 2 -MIL-125(Ti) exhibits a significantly enhanced photocatalytic activity for the selective oxidation of aromatic alcohols. Preliminary studies indicate that the doping of Ni nanoparticles into NH 2 -MIL-125(Ti) could improve the visible-light harvesting, charge-separation, and electron-transport of the resultant catalyst, leading to the enhanced photocatalytic activity. The current work provides some guidance in the development of MOF-based photocatalysts for organic syntheses.
研究领域:
材料化学
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有机合成
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光催化
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产品关联
DOI
高影响因子
JOURNAL OF CLUSTER SCIENCE
·
2022
·Vol. 34
·期 1
·373-383
·
IF 3.447
Zhang Yaping,Yang Hua,Cao Peiyu,He Yufeng,Zhao Yuxuan,Song Pengfei,Wang Rongmin
The hydrophilic Ti 3 C 2 , typical MXenes containing surface functional groups, possess excellent conductivity, was mainly applied in supercapacitors. However, it had not obvious photocatalytic and antibacterial activity because of high electron hole-pair recombination rate and concentration dependence. In this work, a novel MXenes-based Schottky junction (UiO-NH 2 @TiC) was fabricated by a simple solvothermal method using Ti 3 C 2 as the conductive carrier and UiO66-NH 2 as positively charged nano-MOFs (metal organic frameworks). After verifying the synthesis of UiO-NH 2 @TiC by SEM (scanning electron microscopy), EDS (energy dispersive spectrometer), XRD (powder X-ray diffraction), and FT-IR (Fourier transform infrared spectroscopy), its photochemical properties were also measured. Then, the photocatalytic antibacterial activity and the photodegradation behavior were investigated. The results indicated that UiO-NH 2 @TiC Schottky junction could not only remove the remaining antibiotics in wastewater (91%), but also effectively inhibited the growth of bacteria, and the inhibition rate of E. coli ( Escherichia coli ) and S. aureus ( Staphylococcus aureus ) more than 95% under visible light irradiation. In summary, it is an effective strategy for constructing functional Schottky junction. What’s more, the obtained Schottky junction has great potential in practical application.
研究领域:
材料科学
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环境科学
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微生物学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Shuna Jia,Zhijiang Dong,Zhiqiang Wang,Boxiong Shen,Honghong Lyu
Efficient catalytic reduction of the main greenhouse gas CO 2 into high value-added chemicals is an important measure to alleviate the greenhouse effect and energy depletion. Metal nitrogen (M-N 4 ) macrocyclic complexes have attracted increasing attention in the field of electrocatalytic CO 2 reduction (CO 2 RR) due to the precise adjustment of the catalytic active site according to the requirements and the flexible modification of the external ligand structure. Nevertheless, the poor activity and low selectivity of reduction products restrict their widespread application in electrocatalytic CO 2 RR. Herein, a combination of nanoscale and molecular level method has been developed to construct easily obtainable 4NH 2 -NiPc/NH 2 -CNT hybrid material, in which amino groups are connected to provide electrons toward the central Ni-N 4 site to promote the electrocatalytic CO 2 RR catalytic activity. As a result, the catalyst 4NH 2 -NiPc/NH 2 -CNT mainly produces CO in the electrocatalytic CO 2 RR, which exhibits a Faradaic efficiency of CO (FE CO ) higher than 92 % within a wide overpotential range of −0.70 to −0.95 V vs. RHE, and provides excellent stability with a current density of 12 mA cm −2 at −0.80 V vs. RHE. In addition, 4NH 2 -NiPc/NH 2 -CNT reaches its maximum FE CO value of 96 % at −0.8 V vs. RHE, which is approximately 3.1 times that of the original unmodified NiPc/CNT, demonstrating excellent promotion of electrochemical performance. Similarly, compared to NiPc/CNT without amino modification, the current density of 4NH 2 -NiPc/NH 2 -CNT exceeds it by more than twice. The research results indicate that promoting role of electron substituted amino groups in catalysis dispersion and electronic environment coordination. This study proposes a promising strategy of introducing amino groups into molecular catalysts and hybridizing with carbon nanotube to enhance the electrocatalytic conversion of CO 2 to deep reduction products.
研究领域:
催化化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2020
·Vol. 12
·期 41
·4967-4976
·
IF 2.596
Xin Yao,Jinhui Shen,Qingyan Liu,Huanbao Fa,Mei Yang,Changjun Hou
In this work, we designed and synthesized a nanocomposite comprising an amine-functionalized metal organic framework (UiO-66-NH2), a multiwalled carbon nanotube@reduced graphene oxide nanoribbon (MWCNT@rGONR) and a covalent organic framework (COF) synthesized using melamine and cyanuric acidmonomers via polycondensation (represented by MCA). The UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite was used as a sensitive platform for an electrochemical aptasensor to detect kanamycin (kana). Owing to the rich chemical functionality, amino-rich structure and excellent electrochemical activity, the cDNA strands with terminal amino groups can not only anchor over the UiO-66-NH2/MCA/MWCNT@rGONR surface but also penetrate into the interior of porous UiO-66-NH2/MCA/MWCNT@rGONR networks. The characterization of the UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite was performed by scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD). Furthermore, cyclic voltammetry (CV) and square wave voltammetry (SWV) were employed for the electrochemical performance study of this biosensor. The results indicated that the UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite exhibited high bioaffinity toward the aptamer and the lowest limit of detection at 13 nM (S/N = 3) within a linearity of the kana concentration of 25–900 nM. In addition, it possessed great repeatability, stability and selectivity and obtained satisfactory recovery results in the real analysis of fish meat and milk, indicating the great potential for analytical measurements in food safety.
研究领域:
分析化学
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食品科学
·
生物传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yu Ding,Yuyang Hu,Yangyang Zhao,Yaru Li,Ziteng Huang,Soufian Chakir,Yongfei Xu,Daosheng Sun,Songqin Liu,Huanting Wang,Xianbiao Wang
Indium, copper, and mercury are important raw materials in the electronics industry and often coexist in factory wastewater. Therefore, the development of a highly sensitive and selective method for the simultaneous detection of these heavy metal ions is of great significance for water quality monitoring and environmental protection. Herein, we report a NH2-MIL-53 fluorescent probe for the simultaneous detection of trace In3+, Cu2+, and Hg2+ in water. After a low-temperature NH3 plasma tailoring treatment for grafting electron-donor amine groups, the obtained NH2-MIL-53-M exhibited enhanced fluorescence emission intensity (∼6 times) coupled with selective adsorption of In3+, Cu2+, and Hg2+. This quenched the NH2-MIL-53-M fluorescence and allowed to significantly increase the selectivity and sensitivity for detection of In3+, Cu2+, and Hg2+. The fluorescence quenching constant (Ksv) values were 2.23 × 105, 1.00 × 105, and 2.74 × 104 M–1, while the limit of detection (LODs) values were 0.06, 0.14, and 0.53 μM, for In3+, Cu2+, and Hg2+, respectively. The concentrations of In3+, Cu2+, and Hg2+ in real environmental samples could be determined by addition of appropriate masking agents, and the recoveries were within the range of 94–110%. This study not only supplied a strategy for constructing a highly sensitive and selective fluorescent probe but also established a platform for simultaneous detection of multiple heavy metal ions in water.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
DOI
PubMed
高影响因子
MACROMOLECULAR RESEARCH
·
2022
·Vol. 30
·期 10
·719-730
·
IF 2.127
Zhang Xing,He Juan,Wang Huige,Xu Pengfei,Wang Mingyu,Li Yuanyuan,Chen Jing,He Lijun
In this study, surface molecularly imprinted polymers were synthesized with the metal-organic framework NH 2 -MIL-53 as carrier and naringenin as alternative template of Ochratoxin A (OTA). The amino groups on the surface of NH 2 -MIL-53 reacted with the epoxy groups in glycidyl methacrylate (GMA). Subsequently, the double bonds of the GMA grafting on the surface of the material were used for polymerization to prepare the surface molecularly imprinted polymers. The obtained polymers were characterized by scanning electron microscope, transmission electron microscope, energy spectrometer, Fourier infrared spectrometer, X-ray diffraction, and laser particle size analyzer. Synthetic polymer was combined with solid phase extraction for separation and enrichment of trace OTA in grains. The spiked recoveries were found to be 78.95–106.45%, with relative standard deviations ranging from 5.16% to 6.31%. The detection limit and the quantification limit of the method were 0.04 µg·kg −1 and 0.12 µg·kg −1 , respectively. Comparing the pretreatment effects of the self-made cartridge and the immunoaffinity column on the OTA in the sample, it showed that the self-made column had excellent performance and provided a new pretreatment method for the treatment of OTA in grains.
研究领域:
食品科学
·
分析化学
✓ 已验证
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Huazheng Yu,Yanhong Li,Aisheng Huang
Sialic acid (SA) is a crucial component of glycoproteins and glycolipids on the cellular membrane, which is essential for maintaining the function of cell membranes, such as cell recognition and communication. Simultaneously, sialic acid plays a significant role in many physiological and pathological processes. Hence, it is urgent to develop a simple and sensitive strategy for determining sialic acid. In this work, a new metal-organic framework called UiO-66-NH 2 @B(OH) 2 has been designed and synthesized for the recognition and detection of sialic acid. The boronic acid functional group in UiO-66-NH 2 @B(OH) 2 can bind to a diol moiety of the glycerol side chain of sialic acid, which will attenuate or even quench the fluorescence of UiO-66-NH 2 @B(OH) 2 , thus opening a new road to detect sialic acid. Based on the measurement results, sialic acid can be quantitatively measured in a linear range of 0.05–2.5 mmoL/L with the UiO-66-NH 2 @B(OH) 2 probe. The detection limit of sialic acid is as low as 0.025 mmol/L. Furthermore, the boronic-acid functionalized probe UiO-66-NH 2 @B(OH) 2 displays high sensitivity and high selectivity to recognize the sialic acid in mouse serum samples. Therefore, the developed UiO-66-NH 2 @B(OH) 2 can be used as a promising probe to identify and detect sialic acid in the practical application.
研究领域:
分析化学
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生物化学
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材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）