Small
·
2023
·
IF 13.3
Jing Cuan,Hui Zhou,Xuefang Huang,Xinhang Cong,You Zhou
Developing smart materials capable of solid-state multicolor photoluminescence (PL) switching in response to multistimuli is highly desirable for advanced anticounterfeiting. Here, a ternary MOF hybrid showing hydro-photo-thermo-responsive multicolor PL switching in the solid state is presented. This hybrid is constructed by co-immobilizing Eu 3+ and methyl viologen (MV) cations within an anionic MOF via the cation-exchange approach. The confined guest cations are well arranged in the framework channels, facilitating the synergistic realization of stimuli-responsive multiple PL color-switching through intermolecular coupling. The hybrid undergoes a rapid and reversible PL color-switching from red to blue upon water simulation, which is achieved by activating the blue emission of the framework linker while simultaneously quenching the Eu 3+ emission. Furthermore, the hybrid displays photo-thermo-responsive PL switching from red to dark. UV-light irradiation or heating triggers the chromic conversion of MV to its colored radical form, which exhibits perfect spectral overlap with Eu 3+ , thus activating Förster resonance energy transfer (FRET) from Eu 3+ to MV radicals and quenching the Eu 3+ emission. Inspired by these results, PL morse patterns are designed and fabricated using a novel triple-level encryption strategy, showcasing the exciting potential of this hybrid in advanced anticounterfeiting applications.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Jun Yu,Bin Hu,Pengfei Nie,Xiaohong Shang,Boshuang Zhang,Zhaoyu Tang,Jianmao Yang,Jianyun Liu
Norfloxacin (NX), as one of the most widely used antibiotics, is becoming a potential pollutant in water. Here, the cobalt-decorated nitrogen-rich carbon material containing abundant carbon nanotubes (Co@C-NCNTs) was synthesized by pyrolysis of the Co,Zn bimetal organic frameworks (Co,Zn-MOF). The introduction of Zn led to the formation of abundant CNTs with high aspect ratio and high N-doping in the carbon metrix. The obtained Co@C-NCNTs catalyst was applied to boost non-radical catalysis of peroxymonosulfate for NX degradation with high efficiency. The release of cobalt was greatly inhibited by Co-N interaction and carbon layer protection. The CNTs amount in Co@C-NCNTs and its catalytic activity were tunable with the Zn/Co ratio. At the optimal Zn/Co ratio, the derived Co@C-NCNTs delivered 92% removal of NX in 30 min, significantly higher than the single Co-MOF based catalyst. Free radical quenching experiments and electron paramagnetic resonance demonstrated the singlet 1 O 2 -dominated degradation process of NX accompanied by the •OH and S O 4 − effect. The electrochemical characterization verified that the electron transfer in the PMS system is greatly enhanced due to the presence of Co@C-NCNTs.
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FUEL
·
2023
·
IF 7.4
Wenting Lin,Jianxian Li,Ziyu Zengcai,Baofang Zhang,Xiaoping Wu,Yunhong Pi,Tiejun Wang
Photothermal-driven reforming of methanol solution to hydrogen (PTRM) is an attractive way for sustainable in-situ hydrogen (H 2 ) supply by solar energy. But the effective activation of MeOH and H 2 O to improve H 2 production kinetics at low temperatures faces really challenge. As the cleavage energy barrier of C H bond in methanol is much higher than that of O H bond dissociation, here, we propose the use of CuInS 2 with high interfacial hydroxyl activation capacity to integrate with MIL-101(Cr) matrix via in-situ encapsulation strategy. The pore confinement and site isolation of Cr-MOF matrix (MIL-101(Cr)) keep the high dispersion of CuInS 2 (4.20 nm) and prohibit its agglomeration in PTRM. With synergistically photothermal effect, the insertion of CuInS 2 not only provides a high-speed channel for photoexcited charge migration through the interface between CuInS 2 and MIL-101(Cr) but also enhances the dehydrogenation activity of MeOH and H 2 O effectively as an electron-enriched tank. Moreover, the excellent ability of CuInS 2 to dissociate H 2 O molecules at low temperature promoted the formation of abundant interfacial OH, which reinforces the C H bond cleavage of MeOH to decline the apparent activation energy (26%) and boost the H 2 evolution kinetics (36233.0 μmolg cat -1 h −1 ). Encouragingly, CuInS 2 @MIL-101(Cr) with an exceptional total turnover number (TON) climbing up to 16,775 in 65 h of run without catalyst deactivation. This work provides an important insight for the rational design of ultra-stable photo-thermal catalysts toward solar-driven reforming of methanol solution to hydrogen and conducive to the high activity performance in hydrogen-powered polymer electrolyte membrane (PEMFC) fuel cell.
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Polymers
·
2024
·Vol. 16
·期 12
·1747
·
IF 4.7
Qi Cheng,Xiaoyu Du,Zuyao Fu,Zhaoyang Ding,Jing Xie
Increasing concern over the safety of consumable products, particularly aquatic products, due to freshness issues, has become a pressing issue. Therefore, ensuring the quality and safety of aquatic products is paramount. To address this, a dual-mode colorimetric–fluorescence sensor utilizing Ce-MOF as a mimic peroxidase to detect H2S was developed. Ce-MOF was prepared by a conventional solvothermal synthesis method. Ce-MOF catalyzed the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) by hydrogen peroxide (H2O2) to produce blue oxidized TMB (oxTMB). When dissolved, hydrogen sulfide (H2S) was present in the solution, and it inhibited the catalytic effect of Ce-MOF and caused the color of the solution to fade from blue to colorless. This change provided an intuitive indication for the detection of H2S. Through steady-state dynamic analysis, the working mechanism of this sensor was elucidated. The sensor exhibited pronounced color changes from blue to colorless, accompanied by a shift in fluorescence from none to light blue. Additionally, UV–vis absorption demonstrated a linear correlation with the H2S concentration, ranging from 200 to 2300 µM, with high sensitivity (limit of detection, LOD = 0.262 μM). Fluorescence intensity also showed a linear correlation, ranging from 16 to 320 µM, with high selectivity and sensitivity (LOD = 0.156 μM). These results underscore the sensor’s effectiveness in detecting H2S. Furthermore, the sensor enhanced the accuracy of H2S detection and fulfilled the requirements for assessing food freshness and safety.
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高影响因子
Nature Communications
·
2026
·
IF 18.1
Chen Weicheng,Luo Mingyun,Tan Yuxuan,Yan Lintao,Liao TingTing,Liu Weiqi,Liu Fengwen,Chen Zhixuan,Yao Jinze,Liang Xianghui,Fang Yutang,Wang Shuangfeng,Ke Yujie,Suwardi Ady,Yuen Anthony Chun Yin,Tan Swee Ching,Ravi Sai Kishore
Atmospheric water harvesting (AWH) is limited by the high energy demand for sorbent regeneration, while battery thermal management dissipates substantial low-grade heat unused. Here, we propose a thermally symbiotic architecture integrating these systems. Battery discharge waste heat regenerates a MOF-303 sorbent layer via desorption, while the sorption process passively stabilizes battery temperature. The sorbent’s regeneration enthalpy aligns with the battery’s thermal output, triggering desorption under −12 to −20 A discharge. Within 46 min, the MOF exceeds 50 °C, releasing vapor for condensation in a sealed setup. Concurrently, sorption extracts heat from the battery, reducing peak temperatures by ~10 °C. Notably, this integrated system achieves a water production rate of 1.39 g g −1 day −1 , a 117% increase over solar-driven counterparts. Finite-element simulations validate the heat transfer dynamics and identify key thermal efficiency parameters. This work establishes a closed-loop thermal cycle that repurposes energy-storage waste heat to power AWH, enabling sorbent regeneration without solar heating. The strategy offers a pathway to enhance thermal efficiency across various energy and environmental systems through internal heat recovery.
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高影响因子
ACS Sensors
·
2023
·
IF 8.9
Fan Zhao,Wei Cao,Pu-Hong Wang,Jingfeng Wang,Lingmin Yu,Zhihong Qiao,Zhi-Jun Ding
In2O3 is an optimal material for sensitive detection of carbon monoxide (CO) gas due to its low resistivity and high catalytic activity. Yet, the gas response dynamics between the CO gas molecules and the surface of In2O3 is limited by its solid structure, resulting in a weak gas response value and sluggish electron transport. Herein, we report a strategy to synthesize porous In2O3/Fe2O3 core–shell nanotubes derived from In/Fe bimetallic organic frameworks. The fabricated porous In2O3/Fe2O3-4 core–shell nanotubes present outstanding gas sensitivities, including a response value 3.8 times (33.7 to 200 ppm CO at 260 °C) higher than that of monometallic-derived In2O3 (8.7), ultrashort response and recovery times (23/76 s) to 200 ppm CO, low detection limit (1 ppm), promising selectivity, and long-term stability. The enhanced sensing mechanisms are clarified by the combination of experiment and first-principles calculations, showing that the synergetic strategy of higher adsorption energy, increased electrical conductivity, higher electron transfer numbers, and larger specific surface area of porous core–shell structures promotes the surface activity and charge transfer efficiency. The present work paves a way to tune gas-sensing materials with special morphologies for the development of high-performance CO sensors.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 11
·1-12
·
IF 2.5
Li Fangyuan,Yao Niu,Yuan Huiyu,Cui Junyan,Jia Quanli
The redox properties of electrode materials play a vital role in electrochemical performance. Fabrication of electrode materials with multiple oxidation species is highly desired for ultrasensitive glucose sensing. Herein, multivalent Cu/Cu 2 O/CuO/C (Cu/C) nanocomposites were successfully prepared for non-enzymatic glucose sensing by in situ pyrolysis of Cu metal-organic framework (Cu 3 (BTC) 2 ·3H 2 O, Cu-BTC) at a critical temperature. Structure characterizations showed that the nanocomposites maintained the original morphology of Cu-BTC crystals and exhibited mesoporous structures. Meanwhile, multiple Cu species containing Cu, Cu 2 O and CuO were generated simultaneously, which were tightly pinned on the ligand-derived carbon layers. Thus, under the synergistic effect of multivalent Cu species, mesoporous structure and intense interface contact, the sensing platforms based on Cu/C nanocomposites exhibited good glucose detection performance with a wide linear range of 0.005-2.0 mM, ultrasensitivity of 147.65 μA mM -1 cm -2 , low detection limit of 6.31 μM (S/N = 3), and favorable anti-interference properties and stability. Especially, the Cu/C sensing platform showed excellent recoveries of glucose when used to monitor glucose in real sample of honey. The good electrochemical activities of Cu/C nanocomposites render them promising candidates for sensors and other applications. Graphical abstract
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jie Hu,Xueqing Xiong,Wangwang Guan,Yong Chen,Haizhu Long
In this study, a hierarchical Fe 2 O 3 -Co 3 O 4 heterojunction with abundant oxygen vacancies was fabricated by a MOF-assisted strategy combing with a thermal treatment process. The morphology, nanostructure and other properties of the synthesized samples were comprehensively investigated by related characterizations. The results display that the Co 3 O 4 modified with Fe 2 O 3 nanorod exhibits an admirable mesoporous structure and abundant oxygen vacancies. In addition, the gas sensing devices were constructed by as-prepared samples and demonstrated that the gas sensor based on Fe 2 O 3 -Co 3 O 4 composites shows excellent gas sensitivity of 91.5 towards 100 ppm acetone at a working temperature of 200 °C, with a short response-recovery time of 20/21 s. Meanwhile, the sensor possesses good reproducibility and long-term stability (over 30 days), and outstanding selectivity towards acetone gas. Exploration into a convincing gas sensing mechanism confirms that fabricating of p-n heterojunction architecture, regulating of oxygen vacancies and designing of mesoporous structure synergistically induced the excellent gas sensing performance. Therefore, this work can offer a promising strategy to enhance acetone sensing response of Fe 2 O 3 -Co 3 O 4 in practical applications.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xiaomi Meng,Zhongde Dai,Charles Q Jia,Lin Yang,Wenju Jiang,Lu Yao,Qiying Zhou,Bo Xu
In this study, FAULSP(n)/MOF-199 composites with hierarchical porous structures have been synthesized by zeolite-induced in situ growth of MOF-199 and applied for efficient adsorption of toluene and acetone. The results revealed that the presence of FAULSP triggered morphology evolution and developed new structural defects of MOF-199 due to the coordination of FAULSP and the linker, resulting in a hierarchical porous structure of FAULSP(n)/MOF-199. The SBET of FAULSP(n)/MOF-199 ranged from 1013 to 1344 cm2 g–1, comparable to or even superior to that of MOF-199 (1035 cm2 g–1). FAULSP(n)/MOF-199 had more developed mesoporous structures (Vmes), increased from 0.027 cm3 g–1 of MOF-199 to 0.354 cm3 g–1 of FAULSP(15)/MOF-199. The integrated surface chemistry coupled with the derived hierarchical porous structure provided FAULSP(n)/MOF-199 a good adsorption property of both weakly polar toluene and strongly polar acetone. The FAULSP(4)/MOF-199 showed the best adsorption performance with saturated adsorption capacities of 430.2 and 311.1 mg g–1 of toluene and acetone at 25 °C and 1000 mg m–3. The FAULSP(n)/MOF-199 also exhibited excellent adsorption–desorption stability, with only 4.55 and 8.05% capacity loss of toluene and acetone after five adsorption–desorption cycles. According to the characterization before and after adsorption, the kinetic and thermodynamic studies knew that the adsorption of toluene and acetone on FAULSP(n)/MOF-199 was mostly a physical-adsorption process, in which both monolayer and multilayer adsorption coexisted.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2023
·
IF 3.4
Xiaodong Jin,Xinyi Wu,Qinyong Liu,Shibing Sun,Suping Cui,Sheng Zhang,Chen Chen
In this work, a metal organic framework (Fe-MOF) with the effect of absorbing toxic gases and good compatibility was synthesized by chelating a novel organic ligand contained carbonization groups (reacted by tris(hydroxymethyl) aminomethane and 1,4-piperazine dialdehyde) with iron salt. Then, it was used as the synergist to improve the efficiency of intumescent flame retardant (IFR) within polystyrene (PS) substrate. With the addition of 20% IFR and 2% Fe-MOF, the obtained PS composites exhibited a limiting oxygen index (LOI) value of 28.3% and a UL rating of V-0. Moreover, the peak heat release rate (pHRR), total heat release (THR), and total smoke production (TSP) of PS composites were decreased by 77.6%, 35.2%, and 33.7%, respectively. According to the mechanism analysis, it was found that Fe-MOF mainly acted in the condensed phase, contributing to the existence of dense char residues with the presence of IFR system. In addition, the good compatibility of organic ligand in Fe-MOF with PS substrate could partially alleviate the deterioration of mechanical properties due to the addition of IFR. For PS-20%IFR/2%Fe-MOF, the impact strength was improved from 1.7 kJ/m 2 (PS-22%IFR) to 2.2 kJ/m 2 , the tensile strength was also increased from 21.3 MPa (PS-22%IFR) to 22.4 MPa.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Yunfei Liu,Liying Wang,Guohua Chen,Xin Miao,Gaoqi Wu,Zhenzhu Cao,Yongfeng Zhang
Spherical, controlled-morphology porous nitrogen-containing bimetal oxides (CoO–ZnO@NC-450) were produced. Firstly, the spherical CoZn-BTC@NC precursor with nanoparticles on the surface was prepared by hydrothermal method with 1,3,5-benzenetricarboxylic acid as ligand, Co 2+ and Zn 2+ as metal sources, and polyvinyl pyrrolidone and urea solution with a concentration of 0.1 mol/L added. Then, various nitrogen-containing bimetallic oxide composites were created by calcining the metal–organic framework precursor at 350, 450, and 550 °C in an argon environment. When used as anode material, CoO–ZnO@NC-450 exhibited high cycle stability; at a current density of 0.2 A g −1 , its initial discharge specific capacity was 975.2 mAh g −1 , and remained at 796.2 mAh g −1 and after 100 cycles.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xueting Zhao,Yuanyuan Jiang,Tingyuan Wang,Qianying Lu,Kai Zhao,Jiefeng Pan
Solar-driven interfacial evaporation technology is a promising sustainable approach to mitigate the global energy crisis and clean water scarcity. The advanced interfacial evaporation materials make a non-negligible contribution to the solar thermal utilization for water purification. In this work, a Cu-catecholate metal–organic framework-based photothermal membrane (Cu-CATM) is developed to generate freshwater from seawater and recover clean water from wastewater. Thanks to the unique photothermal effect and the three-dimensional nanosheet array structure of Cu-catecholate metal–organic framework (Cu-CAT MOF), the Cu-CATM enabled a promising evaporation rate of 2.43 kg m −2 h −1 and a high solar-vapor conversion efficiency of 92% under solar irradiance of 1 sun. Further, the Cu-CATM could be applied to solar seawater desalination with durable evaporation rate and no salt accumulation. Also, the Cu-CATM enabled solar utilization for synchronous photothermal desalination and photocatalytic degradation, which highlighted the broader environmental application for water remediation or wastewater treatment via photothermal-photocatalytic route. This work presents a viable and effective route for the development of photothermal membranes toward future sustainable clean water production from non-conventional water resources.
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危险品化学品经营许可证（带存储）