RSC Advances
·
2018
·Vol. 8
·期 22
·12459-12470
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IF 2.936
Minghua Wang,Longyu Yang,Jinyun Yuan,Linghao He,Yingpan Song,Hongzhong Zhang,Zhihong Zhang,Shaoming Fang
A series of bismuth sulfide (Bi2S3) nanorods and amine-functionalized Ti-based metal–organic framework heterojunctions [denoted by Bi2S3@NH2-MIL-125(Ti)] were constructed and explored as bifunctional photocatalysts for Cr(VI) reduction and rhodamine B (RhB) degradation under visible light illumination. Compared with the individual NH2-MIL-125(Ti) and Bi2S3, the as-synthesized Bi2S3@NH2-MIL-125(Ti) photocatalyst exhibited an enhanced photocatalytic activity toward Cr(VI) and RhB owning to the synergetic effect between Bi2S3 and NH2-MIL-125(Ti). Moreover, the Bi2S3@NH2-MIL-125(Ti) heterojunctions showed increased Cr(VI) removal efficiency by adding RhB in the system. The photocatalytic mechanism was proposed based on the analysis of different scavenger for active species and electron spin resonance spectrometry. The introduction of Bi2S3 into NH2-MIL-125(Ti) can extend the light adsorption and improve the transfer and separation of photogenerated charge carriers through the Bi2S3@NH2-MIL-125(Ti) heterojunction with unique band gap structure. The synthesized Bi2S3@NH2-MIL-125(Ti) photocatalyst also exhibited good reusability and stability.
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EUROPEAN JOURNAL OF PHARMACOLOGY
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2021
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IF 4.432
Jun Yan,Qizhen Zhuang,Zhenzhen Li,Yujuan Xiong,Min He,Cunmin Kang,Qiaoxuan Zhang,Liqiao Han,Enyu Liang,Hongcan Liu,Peifeng Ke,Xianzhang Huang
Natural products are a large source of clinically effective antitumor drugs . Millepachine, a natural product derived from leguminous plants, was reported to display antitumor activity . In this study, the novel compound, (1H-indol-5-yl) (5-methoxy-2,2-dimethyl-2H-chromen-8-yl)methanone (MIL-1), was designed and synthesized by fusing millepachine and indole rings. MIL-1 exerted much better antitumor activity than millepachine, manifesting as a 24- to 201-fold increase in vitro cytotoxicity and a 2.4-fold increase in in vivo antitumor activity in hepatocellular cell lines-derived models. The immunofluorescence and HPLC detection revealed that MIL-1 was a potent microtubule targeting agent by interfering with the equilibrium of tubulin-microtubule dynamics and irreversibly binding to tubulin. MIL-1 displayed remarkable antitumor activity with an IC 50 of 31–207 nM towards various human cancer cell lines derived from various organs and tissues, and it exerted no evidence of toxicity against normal cells. Mechanistic studies showed that MIL-1 arrested the cell cycle at G2/M phase and induced apoptosis by activating caspase-3 activity and reactive oxygen species (ROS) accumulation. Moreover, the superior antitumor effect of MIL-1 is worthy of further detailed study for the treatment of hepatocellular carcinoma (HCC).
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IONICS
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2026
·
IF 3.4
Luo Zhangyang,Yuan Mao,Zhao Peng,Yang Xulin,Zhang Qian
Electrochemical water electrolysis has become a prominent strategy to produce H2 and O2 from renewable sources. Herein, the unique CeO2/Fe3O4-0.2 composite with spindle morphology was synthesized through a hydrothermal and high-temperature calcination method. The CeO2 exhibit a variable chemical valence of Ce4+/Ce3+ and generate much oxygen vacancies through redox reactions. The synergy effect between Fe3O4 and CeO2 leads to increase the number of active sites, accelerate the charge transfer process, and enhance the interface between the electrode and electrolyte. The CeO2/Fe3O4-0.2 displays a low overpotential of 305 mV for oxygen evolution reaction (OER) and 73 mV for the hydrogen evolution reaction (HER) at 10 mA cm-2 in 1 M KOH. Additionally, this composite catalyst exhibits outstanding durability and only a slight potential change observed over 100 h for OER. The cell voltage of electrolysis electrolyzer using CeO2/Fe3O4-0.2 as both anode and cathode is 1.56 V to drive 10 mA cm-2. This research effort delivers a complete advantage for the development of cost-effective and highly active bifunctional catalysts for overall water splitting.
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CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yijun Xue,Wei Sun,Qian Wang,Limei Cao,Ji Yang
MOFs (metal-organic frameworks) are stable materials with both organic and inorganic pores, and possess high surface area fascinating structures. Owing to the unique octahedral of aluminum center and strong Al–O bonds, Al-based MOFs show excellent thermal stability. In this paper, MIL-96(Al) is proved to be effective at dispersing Pt particles evenly and sparsely as it is employed as catalyst support. MIL-96(Al) is synthesized via a water based route and different contents of Pt particles are directly deposited on the surface of MIL-96 in one step by hydrothermal method to prepare Pt X MIL-96 (x represents Pt content) catalysts. The catalyst are sprayed evenly on carbon paper, with Pt content of 0.03%, 0.11%, 0.27% and 0.41%, respectively, and are applied in a gas diffusion reactor with snakelike flow field for low temperature H 2 -SCR. For Pt 5 MIL-96/CP, the NO removal efficiency can reach up to 100% at 60 °C. Electron transfer between Pt and MIL-96 is observed via X-ray photoelectron spectron (XPS). It reveals that the deposited Pt is in metallic state. Meanwhile, the electronic structure of MIL-96 is kept intact in the process of Pt depositing. The excellent performance of Pt 5 MIL-96/CP catalyst strongly suggests its potential application.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Rui Cheng,Yiqun Wan,Xuejin Mao,Hao Wan,Fan Liu,Lan Guo,Bingzhen Zhang
This work presents an efficient sorbent for plant growth regulators (PGRs) by regulating the defects of a metal–organic framework MIL-101(Cr). Using the regulated MIL-101(Cr), we developed a simple and effective method for the simultaneous determination of eleven PGRs in fresh fruit juice. The extraction conditions were optimized by an orthogonal array design. Under optimal conditions, the method showed a satisfactory limit of detection (0.1–1.2 ng/g), recovery rates (83.4–110.2 %), and precision (2.9–18.0 % for intra-day and 2.7–10.8 % for inter-day), as well as a greatly suppressed matrix effect. Notably, regulating the defects significantly enhanced the desorption of PGRs on MIL-101(Cr). The sorbent didn’t need to be destroyed to release the adsorbed PGRs and could be reused at least 6 times. Furthermore, the defects of MIL-101(Cr) and interactions between the sorbent and PGRs were studied by TGA, ATR-IR, XPS, NH 3 -TPD and UV–Vis DRS.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiepeng Zhao,Yifei Ma,Zijian Li,Zhaomin Tong,Mei Wang,Liantuan Xiao,Suotang Jia,Xuyuan Chen
This study presents the design of a composite photocatalyst that harnesses the combined effects of internal and external heterojunctions for enhanced performance. The internal heterojunction is achieved by annealing NH 2 -MIL-125(Ti) (NM) under an argon atmosphere, forming an N-doped C-coated anatase/rutile heterostructure (A-NM). By controlling the annealing temperature, the A-NM prepared at 650 °C (A 650 -NM) demonstrates superior photocatalytic CO 2 reduction capability, with an outstanding CO production rate of 0.25 μmol h −1 g −1 under a light intensity of 0.1 W cm −2 . An external heterojunction is then created by combining NM and A 650 -NM in an optimized ratio. At an optimal composite ratio of 9:1 (NM: A 650 -NM), the CO production rate reached 6.3 μmol h −1 g −1 , which is 3.5 times higher than NM and 25 times higher than A 650 -NM. Characterization and DFT analyses reveal that the improved performance stems from the internal heterojunction within A 650 -NM's TiO 2 crystal phases and the external heterojunction between NM and A 650 -NM, which enhanced charge separation and carrier mobility. The N-doped carbon layer further boosts charge carrier transfer efficiency. This work introduces a novel Metal–Organic Framework (MOF)-based photocatalyst for CO 2 reduction, offering valuable theoretical insights and practical strategies for optimizing its performance.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Ai-Hui Cao,Xin-Tai Su,Min Zhang,Qi-Long Zhu
Photocatalytic water decomposition is a cost-effective way to convert sustainable solar energy into chemical energy. While semiconductor photocatalysis has generated considerable interest in photocatalytic hydrogen evolution, it is hampered by fast electron–hole complexation and suboptimal efficiency. Herein, an NH2-MIL-101(Cr)/doped-C3N4 heterojunction possessing a static internal electric field (IEF) is successfully prepared, characterized, and assessed for photocatalytic hydrogen production. The optimized photocatalytic H2 evolution rate of the resultant NH2-MIL-101(Cr)/O–C3N4 is 460 μmol g–1 h–1 under visible light, with an AQY of 2.5% at 450 nm. Spectral evidence indicates that the static IEF facilitates rapid electron transfer from NH2-MIL-101(Cr) to O–C3N4, achieving efficient photogenerated charge separation and a consequent significant enhancement in catalytic activity. This work not only presents a case of construction of an IEF through assembling NH2-MIL-101(Cr) with O–C3N4 but also deepens the insight of the rudimentary mechanisms of the static IEF in heterojunctions for photocatalytic hydrogen evolution.
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SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Siqi Wei,Renjie Li,Ling Li,Dan Huang,Li Wu,Xiandeng Hou
The development of a rapid and accurate assay for the detection of biothiols is critical for early diagnosis and prevention of diseases. Herein, we report that the preparation of photoinduced defective MIL-100-NH 2 (PID-MIL-100-NH 2 ) with oxygen vacancy defects as a surface-enhanced Raman scattering (SERS) substrate by high-energy light irradiation. The substrate exhibited excellent SERS activity to Cys, Hcy and GSH with limits of detection (LODs) as low as 30, 23 and 18 nM, respectively, notably lowering the detectable concentration by at least 10 5 times compared to the Au NP substrate. Such superior SERS activity is attributed to the energy level matching of the PID-MIL-100-NH 2 substrate and the biothiol molecules, which results in efficient multiple charge-transfer resonances, such as photoinduced charge-transfer (PICT), ground-state charge-transfer (GSCT), and exciton resonances. Making good use of the rich fingerprint information, selective identification and simultaneous quantitation of biothiols in complex biological environment can be achieved. Trace biothiols in human serum samples have been successfully determined using this method. This work provides a feasible strategy to construct efficient charge-transfer resonances, enabling high-performance direct SERS sensing of biological small molecules.
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Materials Today Communications
·
2024
·
IF 3.7
Peihang Shen,Zelong Liu,Yibo Zhang,Zelin Meng,Mingyang Song,Heming Zhao,Jianglei Hu,Fengwei Shi
Vinyl-functionalized SBA-15 was synthesised using a one-pot co-condensation method followed by carboxylation via nitric acid, with the intermediate product named SBA-15C. MIL-68 was then synthesised in-situ by adsorption of Al 3 + ions via carboxylate groups on SBA-15C to give the composite xMIL-68(Al)@SBA-15C. A series of characterizations were conducted by Fourier transform infrared spectroscopy, Brunner-Emmet-Teller measurements, X-ray diffraction, X-ray photoelectron spectroscopy, Scanning electron microscope, and Transmission Electron Microscope. xMIL-68(Al)@SBA-15C maintained robust catalytic performance in the NaBH 4 -mediated reduction of 4-nitrophenol to 4-aminophenol, with no significant decrease in activity after five cycles of reuse.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuhui Xue,Changyan Guo,Jingjing Wang,Xueli Yang,Meng Wang,Jide Wang
The overuse of antibiotics poses a serious threat to the ecosystem. In particular, antibiotic residues in the aquatic environment are particularly serious. Therefore, preparation of efficient adsorbents for removing trace antibiotic residues from the environment becomes essential. In this work, a series of magnetic porous carbon material (Fe-MPC-gly) derived from MIL-101, which was regulated by glycine, were prepared by high temperature calcination for the adsorption of trace sulfonamide antibiotics (SAs) in water. The morphology of MIL-101 was found to gradually change from a regular ortho-octahedron to an acicular spindle with the increase as the glycine content increased. The results of adsorption experiments showed that Fe-MPC-gly-2 had the best adsorption effect on SAs. In particular, the adsorption of Fe-MPC-gly-2 on SAs could reach the adsorption equilibrium in 5 min, and the maximum adsorption amounts were 50.0 mg·g −1 and 38.2 mg·g −1 for sulfameter and sulfachloropyridazine, respectively. The adsorption kinetic model was best fitted to the quasi-first-order kinetic model. The possible adsorption mechanisms were pore filling, hydrogen bonding and π-π interactions. Meanwhile, the synthetic strategy of this study provides an idea for the preparation of efficient adsorbents for antibiotics.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2026
·
IF 4.8
Jie Hu,Hui Chen,Ruibin He,Pran Gopal Karmaker,Xiupei Yang,Fenglin Tang
Rapid and sensitive detection of picric acid (PA), a highly toxic and water-mobile nitroaromatic pollutant, is essential for environmental safety and public health protection. Herein, we fabricate a dual-emission ratiometric fluorescent probe by immobilizing high-load red-emitting carbon dots (R-CDs) onto NH₂-functionalized MIL-53(Al), forming an R-CDs/NH 2 -MIL-53(Al) composite for selective aqueous-phase PA sensing. R-CDs were hydrothermally synthesized with citric acid and neutral red as co-precursors. The loading efficiency was maximized by systematically optimizing precursor molar ratios and dilution conditions. The composite exhibits distinct selective fluorescence quenching in the presence of PA. Mechanistic characterizations, including fluorescence lifetime decay measurements and spectral overlap analysis, verify that the fluorescence quenching originates from two synergistic quenching pathways, namely competitive light absorption and fluorescence resonance energy transfer (FRET), rather than nonspecific physical interactions. This ratiometric sensing platform achieves a wide linear detection range of 0.1–70 μM and an ultralow limit of detection (LOD) of 32.9 nM. Spike-and-recovery assays using real environmental water samples (tap water, commercial bottled mineral water, and Jialing River surface water) produced recoveries of 99.7%–105.1%, with relative standard deviations (RSD) below 5.86% ( n = 3). Furthermore, a smartphone-enabled visual quantitative method based on RGB color channel analysis was constructed, enabling portable on-site detection without large-scale laboratory instrumentation.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yi Wen,Chenguang Qian,Xiaohan Li,Ruizhe Sang,Fang Yuan,Chunquan Li,Zhiming Sun
The development of heterojunction photocatalysts is pivotal in enhancing charge transfer and inhibiting the recombination of photoexcited electron-hole pairs, which is an effective strategy to improve CO 2 conversion. In this study, we have been assembled the TiO 2 @NH 2 -MIL-125 S-scheme heterojunction on the surface of diatomite. Comprehensive characterization confirms the S-scheme charge transfer pathway, which not only promotes preferential accumulation of photogenerated charges at catalytically active sites but also enables rapid, low-resistance charge separation and migration. Meanwhile, the introduction of diatomite improves the dispersion of the active components and accelerates the separation of photogenerated carriers driven by the built-in electric field. Consequently, the TiO 2 @NH 2 -MIL-125/diatomite composite exhibits selective photocatalytic CO 2 to CO conversion without requiring sacrificial reagents. The composite achieves a CO evolution rate of 13.53 μmol g −1 h −1 , which is 2.20 times and 1.33 times higher than pure TiO 2 and the binary TiO 2 @NH 2 -MIL-125 composite, respectively. Furthermore, the composite maintains a stable CO production rate after three reaction cycles. This study presents an approach to designing mineral-supported S-scheme heterojunction photocatalysts for solar energy conversion applications.
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