CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Wenjing Chen,Huan Tang,Han Li,Yu Zhao,Xiaozhi Wang,Jiachao Chen,Zhihui Chen,Yaxian Zhu,Wenlan Yang
Fluoride contamination is a serious problem of global concern, and water decontamination from fluoride remains an imperative but also a challenging task. Recently, Ce-Fe bimetal oxyhydroxides (CFBOs) nanoparticles of sufficient hydroxyl group and high reactivity have exhibited unique advantages for specific fluoride elimination. Unfortunately, they are difficult to apply directly in scale-up water treatment due to their ultrafine nature. Herein, we fabricated a novel polymer-based Ce-Fe bimetal oxyhydroxides nanocomposite, i.e., CFBOs@201, by co-precipitation of Ce/Fe oxides nanoparticles inside a porous polystyrene anion exchanger D201. The material characterization results confirmed that CFBOs were successfully immobilized inside the pores of D201 with nanoscale and micro crystalline nature, and the shielding effect of the host D201 significantly improved the chemical stability of CFBOs against pH variation (3–12). As compared with cerium and ferric (hydr)oxides nanocomposites (HCO@201 and HFO@201) and its host D201, CFBOs@201 exhibited superior capacity and better selectivity for fluoride adsorption. Thanks to the inner-sphere complexation between immobilized CFBOs and fluoride, the concomitant competing anions exerted negligible effect on the defluoridation efficiency of CFBOs@201. Fluoride uptake onto CFBOs@201 agreed well with the pseudo-second-order kinetic model and the Langmuir isotherm model, and the calculated maximum adsorption capacity was 65.99 mg/g. The exhausted CFBOs@201 could be efficiently regenerated by a simple alkaline treatment for cyclic utilization with constant defluorination performance. Fixed-bed assays demonstrated that the encapsulating of CFBOs nanoparticles enhanced the effective treatment capacity of CFBOs@201 by 10–12 times over the host D201 irrespective of whether synthetic wastewater or mine drainage was the feeding solution. The above results verified that CFBOs@201 is a new kind of efficient defluoridation adsorbent with practical application prospect.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2024
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IF 15.7
Rushuo Li,Linmeng Wang,Peiyun Zhou,Jing Lin,Zhiyuan Liu,Juan Chen,Danfeng Zhao,Xiubing Huang,Zhiping Tao,Ge Wang
Developing catalysts for dicyclopentadiene (DCPD) hydrogenation to tetrahydrodicyclopentadiene (THDCPD) at low temperature is crucial and challenging for the green and energy-saving production of high energy density aviation fuel. Herein, hierarchically porous UiO-66(Ce) encapsulate Ru nanoclusters (NCs) was successfully customized by soft template method and in-situ reduction. The mesoporous UiO-66(Ce) promoted the high dispersion of Ru NCs, and the transfer of substrate molecules. By controlling the synthesis conditions, the electronic state, abundance, and microenvironment of Ru NCs were precisely regulated. Theory calculation and experimental results revealed that metallic Ru as the main active sites greatly promoted the adsorption and activation of substrate molecules. Therefore, mesoporous UiO-66(Ce) encapsulated Ru NCs showed remarkable catalytic DCPD hydrogenation performance with DCPD conversion of 100% and THDCPD selectivity of ~100% (60 °C, only 35 min). This study has brought new inspiration and guidance to the rational design of function materials for various catalytic applications.
研究领域:
催化材料
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能源化学
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纳米科技
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2025
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IF 6
Qianqian Wang,Baoshan He,Yao Liu,Ligen Wu,Wenhong Zhao,Dongdong Xie,Wenjie Ren,Yiwei Xu
Antibiotic residues in food and the environment pose significant risks to public health and safety, necessitating the development of rapid, portable, and efficient detection methods. Ofloxacin (OFL), a widely used antibiotic, is of particular concern due to its potential for contamination in milk and surface water. Current detection methods often require expensive instrumentation and complex procedures, limiting their applicability for on-site testing. This work addresses the critical need for a cost-effective, portable approach to reliably detect OFL residues. We developed a novel personal glucose meter (PGM)-based aptasensor utilizing a porous spherical cerium-based metal-organic framework (Ce-MOF) as a loading platform for glucose oxidase (GOx) and oligonucleotide sequences (Ce-MOF-GOx-cDNA). The hybrid probe, formed by conjugating Ce-MOF-GOx-cDNA with aptamer-modified magnetic beads, enabled specific recognition of OFL through nucleobase pairing. The sensor exhibited a detection range of 50 pg/mL to 500 ng/mL with a detection limit of 40 pg/mL under optimal conditions. The process showed excellent selectivity, stability, and reproducibility. Real-sample testing in spiked milk and surface water demonstrated recovery rates of 99.5% – 108%, with relative standard deviations of less than 4.7%. This study presents a portable and efficient strategy for detecting OFL residues using a PGM-based aptasensor. The method combines simplicity, rapid detection, and high sensitivity, offering significant potential for on-site applications in food and environmental safety monitoring.
研究领域:
食品安全
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环境监测
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生物传感技术
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2024
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IF 8.1
Guanwei Peng,Yanyu Xie,Hui Chen,Jin Zou,Li Li,Chuanfa Luo,Limin Lu,Guojiang Mao
Photo-Fenton-like technology based on H 2 O 2 is considered as an ideal strategy to generate reactive oxygen species (ROS) for antibiotic degradation, but O 2 overflow in the process severely limits the utilization efficiency of H 2 O 2 . Herein, we fabricate Bi 2 MoO 6 (BMO) photocatalyst modified with Frustrated Lewis pairs (FLPs) as a Fenton catalyst model for enhancing reuse of spilled O 2 . The FLPs created by the introduction of cerium and oxygen vacancy were found to contribute to regulate the electronic structure of BMO and further improve the acidic and basic properties of photocatalyst surface. More importantly, the frustrated acid and base sites can enhance the H 2 O 2 and O 2 interfacial adsorption process and provide an Ce 4+ -O v -O 2− active site on the surface of Ce-BMO nanosheets, which can promote O 2 /•O 2 − / 1 O 2 /H 2 O 2 redox cycles to achieve high H 2 O 2 utilization efficiency. Specifically, in the experiment using tetracycline as a photocatalytic degradation object, the degradation activity of Ce-BMO was 2.15 times higher than that of BMO pure phase. Quenching experiments and EPR assays also confirmed that 1 O 2 and •O 2 − were the dominant oxidative species. This study systematically reveals the design of Fenton photocatalytic active sites at the atomic scale and provides new insights into constructing FLPs photocatalysts with high H 2 O 2 utilization efficiency.
研究领域:
环境科学
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材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
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2021
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IF 6.186
Wenbin Li,Jida Wang,Zhen Wang,Jie Chen,Xiaoan Nie,Zhangshuai Ding,Dechao Wang,Zhifeng Zheng,Yunwu Zheng,Jianchun Jiang
Pt–Sn–Ce/γ-Al 2 O 3 catalysts were synthesized by the impregnation method and used to produce aromatic hydrocarbons (AHs)-rich bio-oil via catalytic fast pyrolysis of cellulose . The upgraded products were on-line analyzed by pyrolysis-comprehensive two-dimensional gas chromatography/mass spectrometry (Py-GC × GC/MS). It was found that Pt–Sn–Ce/γ-Al 2 O 3 catalysts were effective for improving the relative content of AHs in bio-oil. Especially, Pt–Sn–Ce/γ-Al 2 O 3 contributed the highest AHs content (85.82%), which was 3 times than that of γ-Al 2 O 3 , and increased 85.44% compared with non-catalytic. In addition, Pt–Sn–Ce/γ-Al 2 O 3 and Pt–Sn/γ-Al 2 O 3 can generate the highest monocyclic aromatic hydrocarbons (MAHs) with the relative content of 60.24% and 51.92%, respectively. Pt–Sn–Ce/γ-Al 2 O 3 catalyst can be reused five times with stable catalytic activity to produce AHs-rich bio-oil.
研究领域:
能源化学
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催化材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Lan Ding,Fenghua Bai,Burenbayaer Borjigin,Yuning Li,Huiqin Li,Xiaojing Wang
Solar-energy-driven CO 2 conversion into valuable chemical fuels holds great renewable potential. However, most photocatalysts' weak CO 2 adsorption limits more artificial photosynthesis for further utilization. Herein, we present an in situ assembling approach to produce stable Cs 2 AgBiBr 6 /Ce-UiO-66-H composite, in which a tight contact interface between the two participated components was constructed. Benefiting from the photocatalytic properties and high adsorption capacity for CO 2 , the optimized 20Cs 2 AgBiBr 6 /Ce-UiO-66-H adsorption-photocatalyst exhibits outstanding performance for reductive CO 2 deoxygenation with considerable CO generation rate (309.01 μmol g −1 h −1 ) under simulated solar light irradiation with 300 W Xe lamp, which is about 2.1 and 2.7 times than that of pure Cs 2 AgBiBr 6 and Ce-UiO-66-H, respectively. The excellent catalytic conversion of CO 2 is ascribed to the effective solar harvest and quickly photo-excited carriers’ separation in such assembled architecture. Importantly, due to the in-situ synthesis, Cs 2 AgBiBr 6 QDs are intercalated in the Ce-UiO-66-H frameworks and it could lead to improved stability and induce abundant oxygen vacancies in Cs 2 AgBiBr 6 /Ce-UiO-66-H, which can maintain unchangeable CO 2 conversion rate under wet air with consecutive ten hours of the recycling test. In this work, the combining metal–organic frameworks and lead-free halide perovskite provide great potential for artificial photocatalytic CO 2 -to-CO conversion under a mild gas–solid reaction condition via utilizing solar energy.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Xuemei Wang,Yuan Ma,Zheng Zhou,Zhen Zhang,Jie Zhang,Lin Fan,Xinzhen Du,Xiaoquan Lu
Simple and rapid analytical methods for pharmaceuticals and personal care products (PPCPs) are in high demand for environment monitoring. Herein, an in-situ doping strategy was used to ultrarapid synthesize carbon black (CB)-doped Ce (III, IV)-MOF composite with dumbbell-shaped structure at room temperature, which had been used as an electrochemical sensor for the effective and simultaneous detection of typical PPCPs such as dopamine (DA) and acetaminophen (AC) in complex matrices samples using different pulse voltammetry (DPV). Scanning electron microscope (SEM), Nitrogen adsorption-desorption, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and X-ray powder diffractometer (XRD) were used to characterize the morphological and electrochemical properties of synthesized a series material. The mixed-valent CB/Ce (III, IV)-MOF with excellent pore structure properties provided more exposed active sites, which were more conducive to adsorption and thus improved sensing performance. The result showed that the proposed method had a wide linear range (for DA: 0.3–252.0 µM, for AC: 0.3–252.0 µM) and low detection limits (for DA: 0.0955 µM, for AC: 0.1170 µM). Based on the synergistic effect of both CB and Ce (III, IV)-MOF, the composites modified electrodes had excellent electroanalytical capability for DA and AC, which could be used for efficient and rapid monitoring of ECs and the construction of new electrochemical sensor based on MOFs.
研究领域:
材料科学
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分析化学
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环境监测
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Jiaqi Dang,Min Zhen,Jinning Gu,Yuting Niu,Yunfei Zheng
The detection of biomolecules using MOF-based nanozymes is a widely adopted strategy due to their abundant active sites and inherent enzymatic properties. In this study, we have synthesized three types of cerium metal-organic frameworks (Ce-MOFs) with oxidase (OXD)-like activity using a facile one-pot solvothermal method, simply by adjusting the concentrations of the raw ingredients, for the monitoring of biomolecules. The synthesized Ce-MOFs exhibit strong stability, a higher specific surface area, and more active sites, attributed to their MOF structure. These Ce-MOFs, with their excellent OXD-like activity, demonstrate satisfactory analytical performance in the quantitative determination of glutathione (GSH), showing a linear relationship within the range of 4.7 to 32.5 μM and detection limits as low as 42.76 nM. Furthermore, this colorimetric biosensor was successfully applied to monitor the content of GSH in the gingival crevicular fluid of patients with periodontitis. This paper extends the application of Ce-MOFs in bioassays and provides new insights into the application of OXD-like nanozymes in bioassays.
研究领域:
纳米酶
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金属有机框架
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生物传感器
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酶活性
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生物分析
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牙周疾病
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 7
·775
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IF 4.501
Yang Liu,Gongda Chen,Jianjun Chen,Hejingying Niu
Metal organic framework (MOF) is a type of porous organic material. In this work, three catalysts loaded with noble metal Pt were prepared by NaBH4reduction method with three different morphologies of Ce–MOF as carriers. Their physicochemical properties were characterized by XRD, Raman, FTIR, N2adsorption, SEM, XPS, and TGA. The catalytic performances of different catalysts were evaluated via toluene oxidation and CO2selectivity. Rod–shaped Pt/MOF–BTC exhibited best catalytic performance compared to Pt/MOF–808 and Pt/UiO–66, its T50and T90were 140 °C and 149 °C, respectively. After deducting the effect of specific surface, Pt/MOF–BTC still had the lowest apparent activation energy (62.8 kJ·mol−1), which is due to the abundant atomic Pt and oxygen vacancy content on its surface. After the reaction, the structure of Pt/MOF–BTC may become amorphous according to XRD results. Furthermore, the presence of amorphous structure had no effect on the catalytic activity of the catalyst. In the stability test of Pt/MOF–BTC to toluene oxidation, both toluene conversion and CO2selectivity remained at 100%, and remained stable for 11 h. Moreover, Pt/MOF–BTC also had better resistance to high weight hourly space velocity (WHSV) or water resistance. The catalyst maintained high catalytic activity for 3 times reusability. This study provides valuable experience for the future work of MOF in the field of VOC catalytic oxidation.Keywords:Ce–MOF;noble metal;oxygen vacancy;catalytic oxidation
研究领域:
催化
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材料科学
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环境化学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Zehui Liu,Dianjin Ding,Jinzhao Huang,Jun Tang,Sixuan Zhang,Xiaolong Deng
It's still a challenge to design reasonably efficient catalyst using non-noble metal for the oxygen evolution reaction (OER). In this paper, we use a simple one-step electrodeposition method to load Ce and S co-doped NiFe amorphous alloys onto Cu(OH) 2 nanorod arrays. The excellent oxygen electrocatalytic performance of the catalyst NiFeCeS/Cu(OH) 2 /CuF is attributed to the electronic environments of the active sites of Ni and Fe regulated by heteroatomic sulfur and cerium , which promote the transfer of the oxygen precipitation intermediates to the higher valence states. Meanwhile, the highly conductive substrate accelerates the electron transfer efficiency of the catalyst material, and the loose nanostructure increases the specific surface area , exposing more active sites. NiFeCeS/Cu(OH) 2 /CuF shows outsanding electrocatalytic activity for oxygen evolution with a low overpotential of 227 mV at a current density of 10 mA cm −2 in alkaline medium. Moreover, the nanocomposite catalyst also exhibits rapid reaction kinetics and long-term stability and durability. In this work, an efficient oxygen precipitation catalyst is reported, which indicates that non-precious metal-based electrocatalysts have great potential for application in water electrolysis and provides a basis for the rational design and synthesis of nanorod array catalysts with unique structures.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 37
·25681-25690
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IF 3.9
Jie Liang,Ting Fan,Jian-tao Lü,Tianjie Guan,Ting-ting Deng,Bangyun Xiong
NaGdF4:Ce,Eu,Tb nanocrystals were successfully prepared by a one-step hydrothermal method with Ce3+ ions as sensitizers, Eu3+ and Tb3+ ions as activators, and polyethylenimine (PEI) as surfactants. Color-adjustable fluorescence emission was achieved by the energy transfer effect between rare earth ions. Blue fluorescent carbon quantum dots (CDs) with a double UV response under 254 nm and 365 nm excitation were synthesized by a one-step hydrothermal method. A hydrophilic NaGdF4:Ce,Eu,Tb/CD composite ink was prepared by an easy physical mixing method. Because of the electrostatic self-assembly effect, the color adjustable luminescence was achieved in a few seconds, and the white light emission with color coordinates of (0.32, 0.32) was obtained. A dual-mode luminescence anti-counterfeiting pattern was designed and achieved by excitation with ultraviolet light at 254 nm and 365 nm.
研究领域:
材料科学
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光学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
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IF 7.968
Beilei Li,Xiaoxiang Wang,Yaqing Wang,Weijia Wang,Shuguang Zhou,Shihan Zhang,Wei Li,Sujing Li
Elimination of NO x from the non-electric industrial boilers has become priority under the effective implementation of ultra-low emissions. A series of Ce-promoted FeVO 4 catalysts with improved acidity and reducibility have been synthesized in this work. Thereinto, 10Ce/FeVO 4 exhibited an optimum low-temperature performance with 90% of NO x conversion and 95% of N 2 selectivity at 200–300 °C which was kept nearly unchanged with different concentrations of SO 2 ranging from 50 ppm to 200 ppm, showing a superior sulfur tolerance. An array of well-designed experiments has demonstrated that Ce mainly existed as CeVO 4 under a low doping content (1 wt%) on FeVO 4 , which could efficiently increase the amount of acid sites. With more cerium (5–12 wt%) loading on FeVO 4 , the appearance of CeO 2 further resulted in a strong interaction between cerium species and ion species, thus significantly improving the low-temperature catalytic activity . Therefore, the optimum coexistence of CeVO 4 and CeO 2 over 10Ce/FeVO 4 modulated its Brønsted acid and enhanced its redox circulation of Fe 3+ species. Moreover, the NH 3 -SCR reaction pathways of 10Ce/FeVO 4 were broadened from only Eley-Rideal to both Eley-Rideal and Langmiur-Hinshelwood mechanisms after Ce loading on FeVO 4 catalyst. With the presence of SO 2 , the S O/S-O deriving from the generated Ce 2 (SO 4 ) 3 and NH 4 HSO 4 increased the Brønsted acid sites, inducing a satisfying SO 2 tolerance of 10Ce/FeVO 4 catalyst, although the Langmiur-Hinshelwood pathway of 10Ce/FeVO 4 was immediately cut off due to the competitive adsorption of gaseous SO 2 and NO x . This work exemplifies a promising strategy for developing an ideal low-temperature NH 3 -SCR catalyst with good SO 2 resistance.
研究领域:
催化
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环境科学
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化学工程
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DOI
高影响因子
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