COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Xinyue Yang,Yong Li,Deyun Yue,Rui Li,Haojie Song
The construction of ternary heterojunction photocatalysts can achieve multi-gradient transfer of charges and accurate control the position of photogenerated electrons which has received increasing attention. In this paper, NH 2 -MIL-53(Al)@BiOBr@CQDs-10 % (ABCQDs-10 %) was prepared via a facile hydrothermal and chemical synthesis processes. Three-dimensional serration of NH 2 -MIL-53(Al) as a platform for irregular BiOBr nanosheets, CQDs promote interfacial contact and act as electron transport channels between BiOBr and NH 2 -MIL-53(Al) and constitute Z-type heterojunctions with high redox properties. ABCQDs-10 % shows the best photocatalytic removal efficiency (94.24 %) of CIP, the reaction rate constants (0.045 min −1 ) were 1.2 and 64 times higher than BiOBr and NH 2 -MIL-53(Al), respectively. The excellent degradation performance is attributed to the construction of Z-type heterojunction of NH 2 -MIL-53(Al)@BiOBr@CQDs which improve electron-hole separation and transfer efficiency. The main active species was •O 2 - . The photocatalytic activity of ABCQDs-10 % had not obvious loss after cycle experiments and the crystal structure had no significant changes, means high stable photocatalytic activity.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 4
·2397-2404
·
IF 3.361
Jing Chen,Yali Xu,Shuying Li,Fanghong Xu,Qian Zhang
Tetracycline detection has been a great concern because of its overuse and difficulty in degrading. Here, a detection method with ratio fluorescence was developed by synthesizing Eu3+ doped nanocomposites with NH2-MIL-53(Al) nanosheets. After adding tetracycline, the fluorescence intensity at 616 nm characteristic emission peak of Eu3+ was sensitized by the antenna effect generated from coordinating Eu3+ with tetracycline, but the fluorescence of NH2-MIL-53(Al) at 433 nm was quenched by the fluorescence resonance energy transfer between the Eu3+-tetracycline composition and NH2-MIL-53(Al). Therefore, the efficient detection of tetracycline was achieved based on this change of ratio fluorescence signal. The experimental results show that Eu3+/NH2-MIL-53(Al) has excellent selectivity, a wider linear range and a lower detection limit for detecting tetracycline. This method can afford favorable ideas for developing advanced chemical and biological sensors.
研究领域:
分析化学
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环境科学
·
生物传感技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Cheng Liu,Mengning Chen,Yueling Chen,Qi Chen,Jionghua Wu,Sen Lin,Ling Wu,Jimmy C. Yu
This work develops a series of bimetallic MIL-68(InFe) MOF nanorods (NM(In 1-x Fe x )) mimicking the nitrogenase for biomimetic photocatalytic N 2 fixation. The partial substitution of In 3+ with Fe 3+ leads to the electron redistribution from In 3+ to Fe 3+ , generating electron-poor In 3+ (In (3+δ)+ ) sites and electron-rich Fe 3+ (Fe (3–δ)+ ) sites as an electron acceptor–donor combination to promote the N 2 activation by a π back-donation mechanism. The smaller size of the nanorods further provides more accessible active sites than the bulk counterpart. In cooperation with the H + released from the H 2 O, the activated N 2 molecules were reduced by photogenerated electrons to give NH 3 . The optimal sample NM(In 0.90 Fe 0.10 ) exhibited the highest NH 4 + production rate of 30.8 µmol·h −1 ·g −1 without any sacrificial agent, attributed to the presence of abundant In/Fe bimetallic sites for N 2 activation and enhanced charge mobility. This work provides new insights into rational design for artificial N 2 fixation systems by mimicking natural nitrogenase.
研究领域:
材料科学
·
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yongpan Shan,Yajie Ma,Changcai Wu,Xiangliang Ren,Xianpeng Song,Dan Wang,Hongyan Hu,Xiaoyan Ma,Yan Ma
Control release of pesticides based on target plant characteristics is highly desirable for improving the effective utilization rate and reducing non-target organism risks. Here, the controlled release formulations (Cu-CS@IN@MIL-100 (Fe)) were successfully prepared by employing MIL-100 (Fe) as the carrier material, indoxacarb (IN) as the model pesticide, and chitosan (CS) as a coating to chelate copper ions by chemical crosslinking. The prepared Cu-CS@IN@MIL-100 (Fe) had an acceptable loading content (36.25 %). The introduction of CS and copper ions endowed it with sustained release properties under weak acidity conditions like cotton leaves. The laboratory bioassay experiments showed that Cu-CS@IN@MIL-100 (Fe) had practical good insecticidal activity (LC 50 = 4.936 mg/L) in controlling Helicoverpa armigera larvae. For long-term control efficacy experiments, after 14 days of application, the Cu-CS@IN@MIL-100 (Fe) treatment (73 %) mortality of Helicoverpa armigera larvae was significantly higher than the 15 % indoxacarb suspension concentrates (SC) treatment (27 %). Moreover, Cu-CS@IN@MIL-100 (Fe) had no adverse effect on cottonseed germination and the acute toxicity to Chrysopa pallens larvae was significantly lower than IN SC. Therefore, MIL-100 (Fe) could be used as an ecological safety carrier for pesticide delivery to improve IN effective utilization and reduce non-target organism risks.
研究领域:
农业科学
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农药科学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 17
·5487-5492
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IF 3.842
Feng Zhang,Xiaoqin Zou,Fuxing Sun,Hao Ren,Yuan Jiang,Guangshan Zhu
A thin film of MIL-53(Al) on the activated Al slice has been prepared successfully. The crystals in the films exhibit high phase purity and a preferential orientation with straight channel network (or (h0l) planes) of the crystals parallel to the support surface, which are studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The loading of organic (2-(2-hydroxyphenyl)-pyridine) (PP) fluorescent molecules in the film has been accomplished. The behaviours of the fluorescent molecules assembled in the pores of the oriented crystals are probed by Fourier transform infrared (FT-IR) and fluorescence spectroscopies.
研究领域:
材料科学
·
纳米技术
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生物医学工程
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药物递送
·
表面科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2013
·Vol. 3
·期 8
·2044-2049
·
IF 3.753
Yindi Zang,Jing Shi,Fumin Zhang,Yijun Zhong,Weidong Zhu
The sulfoxy or sulfonic acid-functionalized MIL-101 catalyst was prepared by either post-functionalization or pre-modification of the organic linkers with the functionalized ligands, respectively, the latter is the so-called one-pot synthesis method. These catalysts were systemically characterized by XRD, N2 adsorption, acid–base titration, and FT-IR techniques and applied in the liquid-phase esterification of monocarboxylic acids with monohydric alcohols. The results show that the sulfonic acid-functionalized MIL-101 (S-MIL-101) prepared by the one-pot synthesis method possesses a higher catalytic activity in the esterification than its counterpart the sulfoxy acid-functionalized MIL-101 (S/MIL-101) prepared by the post-functionalized method, due to the fact that S-MIL101 has a higher acid loading and a high utilization efficiency of the functionalized acid sites. Moreover, S-MIL-101 is stable to leaching, behaves as a true heterogeneous catalyst, can be easily recovered by filtration, and can be reused five times in succession without any loss of its catalytic activity.
研究领域:
材料化学
·
催化化学
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产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2021
·Vol. 22
·期 2
·345-353
·
IF 2.153
Liu Jun,Sun Meng,Chang Meng-Jie,Fan Si-Meng,Hui Qian,Ni Fu-Rong,Yuan Bin
Novel CoFe 2 O 4 /MIL-100(Fe) (CFO/MIL-100(Fe)) core/shell nanofibers were prepared by successive ionic layer adsorption and reaction (SILAR) assembly of MIL-100(Fe) on electrospun CoFe 2 O 4 nanofibers. The MIL-100(Fe) shells were constructed on the dispersed CoFe 2 O 4 fiber surface with high uniformity, homogeneous thickness and high stability. Due to the inherent porosity of MIL-100(Fe), a higher specific surface area of 225.77 m 2 /g is achieved for the CFO/MIL-100(Fe)-10 sample. The formed CFO/MIL-100(Fe) catalysts exhibit high catalytic activity towards degradation of rhodamine B (RhB) under visible light irradiation. The photocatalytic activity remains above 77 % within 60 min illumination after four cycles. Due to the simple synthetic method, highly uniform structure, strong magnetic recoverable, as well as good photocatalytic performance, the obtained CFO/MIL-100(Fe) core/shell nanofibers could be promising photocatalysts for practical application.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yanshu Luo,Bingqiong Tan,Xianghui Liang,Shuangfeng Wang,Xuenong Gao,Zhengguo Zhang,Yutang Fang
MIL-100(Fe) has been proven to have good hydrothermal stability and high vapor uptake and is considered as a promising dehumidification material. However, reduction of the production cost and assembly of the adsorbent and glass fiber paper substrate into the MIL-100(Fe) monolith are challenging. This work presented a dry gel conversion strategy for the rapid synthesis of the MIL-100(Fe) monolith at low temperatures. The porosity and crystalline phase of the products obtained under different crystallization temperatures and times were carefully studied. XRD and SEM characterization indicated that the MIL-100(Fe) crystal could be conveniently synthesized on the substrate at a low temperature of 50–70 °C and in a short time of 2–6 h. The spherical particles assembled from crystals dispersed evenly and tightly on the glass fiber paper. The synthesized MIL-100(Fe) monolith had a thickness of about 270 μm and a MIL-100(Fe) loading of 77.7%. Dynamic and static water vapor adsorption tests revealed that the monolithic adsorbent obtained at 50 °C for 6 h had the largest vapor saturation adsorption capacity (0.581 g/g) and the fastest adsorption rate. Moreover, the monolith owned a low regeneration temperature (below 80 °C) and a satisfactory cycle stability. Convenient equipment, mild synthetic conditions, low renewable energy consumption, and good performance will promote its application in the rotary dehumidification system.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Meidan Que,Peihong Ma,Yabo Wang,Yanbo Sun,Xiangwei Bai,Lili Gao,Jin Chen,Jian Wei,Hui Li
NH 2 -MIL-125 with abundant porosity and specific interactions with CO 2 molecules, has been demonstrate great potential in the field of photocatalytic CO 2 reduction. However, conventional NH 2 -MIL-125 and their composites much lower CO 2 photoreduction efficiency in aerobic environments because of the O 2 competition. To circumvent the issue, this study modifies NH 2 -MIL-125 through crystal facet engineering to enhance its selective CO 2 adsorption and photocatalytic efficiency in the environment of impurity CO 2 . The results indicate that NH 2 -MIL-125 featuring (101) crystal planes can sustain elevated catalytic activity in low-concentration CO 2 environments. In a pure CO 2 atmosphere, NM-5 achieves a CO production rate of 159.66 μmol·g −1 after 4 h, 1.85 times greater than the unmodified NH 2 -MIL-125. Under conditions simulating flue gas (5 % CO 2 ) and ultra-low CO 2 concentrations (0.15 % CO 2 ), NM-5 maintains CO production rates of 3.18 μmol·g −1 and 0.95 μmol·g −1 , respectively, representing 1.63 and 1.73 times the production rates of NM. Furthermore, theoretical calculations indicate that CO 2 exhibits a higher adsorption energy (−1.34 eV) compared to N 2 and O 2 (−0.67 eV and −0.15 eV) on the (101) crystal plane, which reveals the preferential adsorption of CO 2 on the (101) crystal planes. This study involves a novel strategy for optimizing MOFs crystal planes and provides significant insights into achieving efficient photocatalytic CO 2 reduction under aerobic conditions.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANICA CHIMICA ACTA
·
2018
·
IF 2.264
Yebin Guan,Ming Xia,Xiaohong Wang,Weicheng Cao,Alessandro Marchetti
Nano-sized NH 2 -MIL-53(Al) particles were conveniently synthesized in aqueous solution at ambient temperature with a widely applicable mixing method, and the morphology and character were examined with a series of techniques. XRD patterns and TEM images showed that the obtained NH 2 -MIL-53(Al) material possessed rod-like shape, which is different from those obtained from N, N-dimethyl formamide (DMF). This nano-sized NH 2 -MIL-53(Al) matrix displayed enhanced efficiency for adsorptive elimination of methyl blue molecules in aqueous solution.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 67
·54757-54761
·
IF 3.84
Songjie Fan,Shan Wu,Jianhua Liu,Dan Liu
The synthesis conditions of MIL-120 membranes supported by a-Al2O3 hollow ceramic fibers (HCFs) were studied systemically. The continuous and compact MIL-120 membranes were successfully synthesised by secondary growth with in situ seeding step. The MIL-120 membrane shows the separation factors of H2–CO2, H2–CH4 and H2–N2 are 9.4, 7.9, and 7.3 respectively at 293 K and 1 bar with H2 permeance of 3.5 × 10−7 mol m−2 s−1 Pa−1 as well as high thermal stability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yan Fan,Bo Hou,Fang Lu,Dao Liu,Xiang Cui
A novel “turn-on” fluorescent sensor of CeO 2 @MIL-88B was constructed successfully via the facile in-situ strategy. The as-obtained CeO 2 @MIL-88B could be used for effectively detecting the analyte of thiabendazole (TBZ) by luminescence enhancement, which limit of detection (LOD) was as low as 0.294 μM (nearly 10.4 times smaller than that of MIL-88B). The detection behavior for TBZ exhibited the excellent selectivity and anti-interference ability. Systematic explorations were performed to shed light on the underlying mechanism of “turn-on” effect on fluorescence after adding TBZ. Moreover, the CeO 2 @MIL-88B was also employed for the determination of TBZ in the real samples of orange and cucumber.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）