JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Zehui Li,Yi Yuan,Hao Wu,Xinghui Li,Menglei Yuan,Huaizhang Wang,Xiaoxue Wu,Shuai Liu,Xianming Zheng,Mingjun Kim,Haoyun Zheng,Sadia Rehman,Guangya Jiang,Wangyang Fu,Jingkun Jiang
Carbon frameworks (CFs) derived from metal-organic frameworks (MOFs) have been produced as adsorbents of toluene. To further obtain optimum hierarchical porous carbon structure of CFs, different treatment temperatures were applied to a typical kind of MOFs (ZIF-8). The adsorption capacity of the toluene of hierarchical porous CFs obtained from ZIF-8 under 1100 °C (CF-1100, adsorption capacity of 208.5 mg/g) was higher than that of other carbonization temperature and MOFs. Impressively, the adsorbent CF-1100 also exhibited strong hydrophobicity , low desorption temperature, and good selectivity to toluene. The adsorption capacity decreased by only 10.4% under wet condition compared with the dry condition, standing on the top of the recently reported adsorbents. The impressive adsorption performance of CF-1100 is attributed to the larger specific surface area (1024 m 2 /g) and pore volume (0.497 cm 3 /g), newly generated micropores (pore width is 0.6–0.8 nm) and mesopores (pore width above 10 nm), and carbonaceous structure with higher degree of graphitization . Based on the adequate adsorption performance, CF-1100 coated quartz crystal microbalances as sensor also showed a high sensitivity of 0.4004 Hz/ppm and small relative standard deviations of 1.0745% for toluene sensing. This contribution provides a foundation for optimizing potential adsorbents and sensing materials for air pollution abatement.
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高影响因子
ANALYTICAL CHEMISTRY
·
2020
·
IF 6.785
Dexin Du,Jiangnan Shu,Mingquan Guo,Mohammad A. Haghighatbin,Di Yang,Zhiping Bian,Hua Cui
Recently, nanoluminophores with the potential-resolved multicolor electrochemiluminescence (PRMCECL) property have emerged and shown promising applications in sensitive, selective, and accurate bioassays, bioimaging, and multicolor emitting devices. However, only limited PRMCECL nanoluminophores and their applications in ratiometric biosensors eliminating proportional errors have been reported. Herein, a novel PRMCECL nanoluminophore was synthesized by encapsulating CdS quantum dots (CdSQDs) into MOF-5 (CdSQDs@MOF-5). Using K2S2O8 as a coreactant, two electrochemiluminescence (ECL) peaks, ECL-1 centered at 685 nm and ECL-2 centered at 475 nm, were observed at −1.4 and −1.8 V, respectively. Related ECL mechanisms have been proposed. Based on the potential-resolved ECL signals, a label-free differential ECL immunosensor for the determination of cardiac troponin I (cTnI) was established by assembly of poly(diallyldimethylammonium chloride), CdSQDs@MOF-5, and cTnI antibody-functionalized silver nanoparticles on the surface of the fluorine-doped tin oxide electrode subsequently. In the presence of cTnI, cTnI was captured by the sensing interface, leading to an increase in ECL-1 and ECL-2 intensity. cTnI could be determined in the range of 0.01–1000 pg/mL with a detection limit of 5.01 fg/mL using the intensity difference between ECL-1 and ECL-2. This work provides a new family member of PRMCECL nanoluminophores. The proposed label-free differential ECL immunosensor provides a new strategy based on potential-resolved ECL signals, which could effectively eliminate the additive error and show better sensitivity, selectivity, and accuracy for the detection of cTnI than the single-signal strategy and ratiometric strategy.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 40
·17413-17421
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IF 3.288
Haifu Zhang,Jie He,Xinhuan Lu,Lu Yang,Chenlong Wang,Fanfan Yue,Dan Zhou,Qinghua Xia
In the past decades, many methods have been developed for synthesizing MOFs, including solvothermal synthesis, mechanical synthesis, electrochemical synthesis, and microwave synthesis. Based on the existing research, a method is proposed for synthesizing Co-MOF by rapidly rotating hydrothermal crystallization, which largely shortens the crystallization time of Co-MOF. When the rotation speed was 150 rpm, only 2 h of crystallization time was needed to synthesize Co-MOF-150-2 with high crystallinity and stability. The optimal Co-MOF-150-2 manifested remarkable activity and selectivity for the epoxidation of α-pinene under mild conditions. The catalytic conversion of α-pinene reached the highest over the Co-MOF-150-2 catalyst, in which the conversion of α-pinene was 99.5% and the yield of 2,3-epoxypinane was 95.7%. The Co-MOF materials synthesized by the rotary method also had excellent stability and highly catalytic activity in recycling experiments.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Yafeng Jin,Guangri Xu,Xiaobo Li,Jingjing Ma,Li Yang,Yuanchao Li,Huan Zhang,Zhen Zhang,Donghao Yao,Donghao Li
To circumvent the binder’s adverse effect on the performance of electrochemical sensor and improve the analysis efficiency, a binder-free cobalt-doped Ni-MOF (Co/Ni-MOF) film, with honeycomb-like structure, is fast electrodeposited on glassy carbon electrode (GCE) by cathodic reduction. No conductive agent added, the Co/Ni-MOF/GCE can be directly used as a sensor for levofloxacin (LEV) determination. Under the optimal condition, a wider linear range of 0.1 μM–500 μM LEV is obtained with the limit of detection (LOD, 3S/N) being 22 nM and the sensitivity of 2.85 μA μM −1 cm −2 . Further, when being used to analysis of LEV in eye drop and spiked milk, satisfactory recoveries of 94.0%–108.2% are achieved. Particularly, benefiting of the synergistic effect of Co 2+ and Ni 2+ , as well as and the binder-free film, the sensor exhibits an excellent sensitivity and a robust long-term stability. This work develops a facile and efficient strategy to synthesis of Co and Ni based MOF film, and provides them a new way in electrochemistry application.
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ANALYST
·
2020
·Vol. 146
·期 2
·605-611
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IF 3.978
Jie Lv,Cong Zhang,Shuangling Wang,Meng Li,Wei Guo
Sensitive detection of copper ions (Cu2+) in biological samples is extremely important since an abnormal level of Cu2+ is linked with many diseases. Herein, we demonstrated a novel turn-on colorimetric sensor for selective detection of Cu2+ both in buffered solution and serum samples based on porous bimetallic transition metal oxide nanocages (ZnO-Co3O4 NCs) as peroxidase mimics. The ZnO-Co3O4 NCs were prepared by using ZnCo-zeolitic-imidazolate-framework (ZnCo-ZIF) as precursors via direct calcination. With the high peroxidase-like activity, the obtained ZnO-Co3O4 NCs can catalyze the oxidation of tetramethylbenzidine (TMB) in the presence of H2O2 to form a blue colored product. The inhibition effect of cysteine (Cys) on the catalytic activity of ZnO-Co3O4 NCs and its strong binding ability toward Cu2+ enabled the ZnO-Co3O4 NCs/Cys system to be utilized for sensitive detection of Cu2+, in which the catalytic activity of ZnO-Co3O4 NCs/Cys can be recovered by the introduction of Cu2+ with an obvious color change of the solution. The linear range for Cu2+ determination was 2 to 100 nM with a detection limit of 1.08 nM. More importantly, this colorimetric sensor has been successfully applied to detect Cu2+ in serum without pretreatment. Our findings are expected to expand the scope of application of nanozyme and shed light on early disease diagnosis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Siyu Fan,Yifan Qu,Lixian Yao,Jianhao Ren,Rafael Luque,Zhili He,Cuihua Bai
The presence of large amounts of antibiotic residues can potentially threaten environmental sustainability and human health. Thus, it is imperative to develop convenient and effective technologies for eliminating antibiotics from aquatic environments, which are major contaminant reservoirs. Herein, based on Zn/Fe-MIL-88B, we designed and synthesized a magnetic nanocomposite (MC) that contains hierarchical pores and as an effective and regenerative adsorbent for the removal of chlortetracycline (CTC) from water. The characteristics of the MC and its CTC adsorption performance were investigated systematically. The synthesized MC sample pyrolyzed at 800 °C (MC-800) consisted of metallic iron and N/O-doped graphitic carbon along with cluster-like particles with a mesoporous structure. Further, the adsorption of CTC on MC-800 (maximum adsorption amount of 1158.0 mg/g) could be described using the Freundlich isotherm model and a pseudo-second-order model, indicating that the surface of MC-800 was heterogeneous. The adsorption is likely driven by weak chemical forces, including hydrogen bond formation, cation-π electron donor–acceptor (EDA), and π-π EDA interactions. Finally, MC-800 could be recovered readily through facile magnetic separation and regenerated such that its adsorption rate remained higher than 85% even after five cycles.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Dandan Jia,Ruoyan Tong,Liangmin Ning,Zewen Yang,Yuting Zhang,Wen Gu,Xin Liu
Graphite anode (specific capacity is only 372 mA h g −1 ) for lithium-ion batteries (LIBs) is not enough for high energy and high power density demands. In this work, MOF-5 was used as a precursor to prepare a porous carbon material embedded with BN (Boron Nitride), while B and N elements will enhance the electron transport speed thus improving the conductivity simultaneously. A large specific surface area of 1790.19 m 2 g −1 was provided with this material because of embedding of lamellar BN, therefore it caused excellent cycling stability and high capacity characteristics in LIBs. The capacity retention is 1290 mA h g −1 at 200 mA g −1 and 683 mA h g −1 at 2000 mA g −1 . This material provides a solution for improving the performance of LIBs, and it can also be a reference for the development in other fields.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 43
·22728-22735
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IF 11.301
Xu Ma,Zheng Deng,Zhuoyi Li,Danke Chen,Xinyi Wan,Xiaobin Wang,Xinsheng Peng
Solar-driven interfacial water evaporation (SDIWE) is a promising way to reduce the fresh water scarcity. However, it is still challenging to generate clean water from volatile organic compound (VOC) contaminated water via SDIWE. In this work, a free-standing MOF-based membrane (Zr–Fc MOF/SWCNT/gelatin, ZSG) with excellent photothermal properties and high Fenton catalytic activity is rationally designed for producing clean water from VOC contaminated water. Thanks to the hierarchical pore structure, excellent photothermal properties and good hydrophilicity of the ZSG membrane, an impressive water evaporation rate of 1.53 kg m−2 h−1 is achieved under 1 sun irradiation. Meanwhile, the Zr–Fc MOF has been demonstrated to be an efficient Fenton catalyst to promote the generation of ˙OH for degradation of methylene blue and phenol. As a result, the VOCs are degraded in situ to prevent their accumulation in the collected water, and the COD value of the regenerated water is lower than the drinking water hygiene standards. Besides, its salinity also meets the drinking water standards of the World Health Organization (1‰).
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
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IF 3.232
Shasha Feng,Fubin Pei,Yi Wu,Jingjing Lv,Qingli Hao,Tinghai Yang,Zhaoyang Tong,Wu Lei
A novel ratiometric fluorescent sensor based on Förster resonance energy transfer (FRET) platform was designed for riboflavin (RF) detection. The graphitic carbon nitrides quantum dots - Zn-MOF composite (g-CNQDs@Zn-MOF) was used as the fluorescent probe . In the FRET system, g-CNQDs@Zn-MOF and RF acted as donor and acceptor, respectively. The probe exhibited high sensitivity and good selectivity to RF, and had been successfully used for the detection of RF in milk and vitamin B 2 tablets. The detection limit of the sensor was 15 nM. The strategy expanded the application of MOF in sensing filed and provided a new method for the detection of RF.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Jiali Tang,Jiling Zhao,Shixing Wang,Libo Zhang,Minghu Zhao,Zhen Huang,Yuting Hu
In this study, a novel metal organic framework (MOF) was prepared by pre-modification strategy and used as adsorbents to recover palladium ions in wastewater. The characterization indicates that the adsorbents have been successfully synthesized. The effects of various factors on the adsorption behavior of the adsorbents for Pd(II) was studied. Experimental research shows that the optimal pH of the adsorption process is 4.0. The adsorption kinetics and isotherms of Pd(II) on the adsorbents show that it conforms to pseudo-second-order and Langmuir models, respectively. Therefore, the adsorption reaction is a single layer adsorption on the uniform surface of the adsorbent, and chemical adsorption is the main rate-limiting step. According to thermodynamic analysis, the adsorption process is entropiezunahme, spontaneous and endothermic. The adsorption mechanism of Pd(II) on the adsorbents is mainly through the electrostatic action and chelation of Pd(II) with N and O atoms, and the reduction of Pd(II) to Pd(0) by N and O functional groups. The adsorbents can selectively uptake palladium ions from multi-ion wastewater, and after five adsorption–desorption cycles, the adsorption efficiency is still high. This new adsorbent has a wide application prospect in the field of palladium ion separation.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Fang Wang,Ting Feng,Xiujuan Jin,Yulin Zhou,Yanjie Xu,Yahui Gao,Haisheng Li,Jianfei Lei
Herein, a robust MOFs-derived super-carbon embedding with single atom Co/Ni anode materials for LIBs is developed by one-step annealing of the core–shell precursor ZIF-8@ZIF-67 with the introduction of dimethylglyoxime nickel as Ni source. The characterization results clearly indicate that atomic Co/Ni active sites accompanied with suitable CoNi nanoparticles are evenly embedded in the MOF-derived hollow rich-nitrogen carbon matrix. Simultaneously, moderate short carbon nanotubes root in polyhedral surface under the catalytic effect from the CoNi nanoparticles and construct an advanced conductive network. As a result, it delivers a high reversible lithium-ion storage capacity of 462.1 mAh g −1 at a current density of 0.5 A g −1 over 500 cycles, excellent rate performance of 223.28 mAh g −1 even at a high current density of 2 A g −1 , which is much higher than most of reported carbon-based electrode materials. The enhanced lithium storage performance mainly derives from the moderate affinity of the Li by the atomic Co/Ni active sites incorporated with their powerful catalytic effect assisting MOF-derived rich-N doped carbon base. Moreover, the superior nano-structure of the hollow rich-nitrogen carbon skeleton with in-situ grown short carbon nanotubes improves the conductivity of electrode materials, relieves the volume expansion and accelerates the migration rate of lithium ions and electrons. The theoretical calculation further confirms the superior affinity of the Li on atomic Co/Ni active sties.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
·
IF 3.99
Jing Pan,Shaobin Li,Fengbo Li,Tingting Yu,Yupeng Liu,Li Zhang,Lin Ma,Ming Sun,Xuefeng Tian
Metal-organic frameworks (MOFs)-based derivatives provide a flexible platform for constructing high performance supercapacitors as electrode materials. Herein, a novel NiFe 2 O 4 /NiCo 2 O 4 /GO composites has been successfully prepared by dual-MOF as precursor. The NiFe 2 O 4 /NiCo 2 O 4 /GO composite formed a special structural morphology providing a large surface area. The composite electrode material exhibited an excellent specific capacity of 661.6 C/g (1470 F/g) at 1 A/g, excellent rate capability (from 1 to 20 A/g the specific capacity decreases about 38 %) and outstanding long cyclic life (89.9 % capacity retention after 3000 cycles). Moreover, an asymmetric supercapacitor was composed of NiFe 2 O 4 /NiCo 2 O 4 /GO and activated carbon as positive electrode and negative electrode, respectively. Meanwhile, ASC exhibited a specific capacity of 373.3 C/g at 1A/g in a potential range from 0 to 1.45 V, it showed the maximum energy density of ASC equal to 109 Wh kg −1 at a power density of 1051.17 W kg −1 . In addition, the NiFe 2 O 4 /NiCo 2 O 4 /GO//AC has an outstanding cycling stability (90.7 % capacitance retention after 1000 cycles), which makes it a potential application for in the field of energy storage-conversion application.
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