NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 17
·8224-8231
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IF 3.925
Haoyun Hu,Guihua Ruan,Xiangqiong Jiang,Hong Pan,Zhuqiang Wu,Yipeng Huang
The improvement of the adsorption performance of adsorbents to the target substance plays a crucial role in the actual sample pretreatment. Here, a convenient, sustainable and efficient strategy was developed for the fabrication of the monodispersed porous carbon material. It was derived from the direct carbonization of zeolitic imidazolate framework-8 (ZIF-8) with controllable pore size and uniform morphology without any additional carbon source. The Brunauer–Emmett–Teller (BET) surface area of carbonized ZIF-8 (C/ZIF-8) was as high as 1463.20 m2 g−1 and pore volume was 0.5608 cm3 g−1, and the adsorption capacity of the C/ZIF-8-based solid phase extraction (SPE) column greatly enhanced to 640.88 μg g−1 compared with the adsorption capacity (93.36 μg g−1) of original ZIF-8 towards ethopabate (ETP), achieving an improvement of about 7 times. Highly efficient ETP extraction was achieved with C/ZIF-8 under pH 3.0–7.0 for 16 min, and nearly 100% desorption efficiency was obtained when eluted with methanol for 12 min. The ETP enrichment on C/ZIF-8 and coupled with the high performance liquid chromatography (HPLC) detection provided a feasible method for the analysis of ETP in chicken samples. The recovery and the relative standard deviation of the method were 89.66–99.58% and 0.31–1.77%, respectively.
研究领域:
材料科学
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环境化学
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分析化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Qianqian Chen,Xiaobing Yang,Xingping Fu,Junjie Pan,Junmei Zhou,Gengwu Zhou,Kejun Cheng
Currently, antibiotics are extensively utilized in the pharmaceutical industry to assist humans and animals in combating various infectious diseases. The extensive use of various antibiotics enhances the quality of life. However, it can also have negative effects on the environment and human health, including water pollution and the rise of antibiotic-resistant microorganisms. To date, antibiotics have been detected in rivers, groundwater, and even drinking water. There is an urgent need to design and develop advanced materials for the remediation of antibiotics present in our environment. In this paper, we successfully synthesized a novel Ag 2 S-ZnS/ZIF-8 hollow heterojunction via facile sulphuration and solvothermal methods. This heterojunction was employed as a catalyst for the degradation of tetracycline (TC) in water under UV and visible light irradiation. The physicochemical properties of the as-synthesized catalysts were thoroughly analyzed using XRD, EDS, SEM, BET, XPS, TEM, ESR, UV–vis techniques. The results demonstrate that Ag 2 S-ZnS/ZIF-8 displays enhanced photocatalytic activity for TC degradation no matter under visible or UV light irradiation. After 10 min of UV light irradiation, its photocatalytic degradation efficiency was achieved 92.74 %. Additionally, Ag 2 S-ZnS/ZIF-8 was able to degrade 92.14 % of TC (visible light, with 35 min). The corresponding kinetic rate constant of Ag 2 S-ZnS/ZIF-8 is 0.145 min −1 (UV light) and 0.043 min −1 (visible light), respectively. Furthermore, Ag 2 S-ZnS/ZIF-8 also shown excellent stability for the degradation of TC in the presence of visible light. This is a result of its high specific surface area, superior photocurrent and efficient separation of photo-generated electrons-hole pairs. Apart from this, the photocatalytic degradation mechanism of TC over Ag 2 S-ZnS/ZIF-8 is discussed in detail.
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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纳米技术
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Aijuan Xie,Jiawen Du,Feng Tao,Yuwei Tao,Zhichen Xiong,Shiping Luo,Xiazhang Li,Chao Yao
A novel three-dimensional graphene surface-mounted nickel-based metal organic framework (3D Gr/Ni-MOF) electrocatalyst was fabricated via freeze-drying technique and ultrasonic assisted method. The morphology, elemental composition , crystal structure, functional group structure, specific surface area and pore size of the composite were analyzed by SEM, EDS, XRD, FTIR, and BET. A series of conditional experiments from the aspects of organic ligand screening, ultrasonic time, molar ratio of metal salt to ligand, and porous graphene loading were carried out to optimize 3D Gr/Ni-MOF composite. Oxygen Evolution Reaction (OER) catalytic performance, OER process kinetics, stability and the deeper causes of enhanced OER performances of 3D Gr/Ni-MOF were also investigated via a group of electrochemical methods. The experiment results showed that 3D Gr/Ni-MOF composite prepared with 2,5-pyridinedicarboxylic acid as ligand, 1:1 M ratio of nickel acetate to ligand, 10 mg of 3D Gr loading and 8 h of ultrasonic process exhibited the most excellent OER activity. Its overpotential of 370 mV was much smaller than rGO/Ni-MOF, Ni-MOF and 3D Gr prepared under the same conditions, and as non-precious metal catalyst , it has the traits of low cost, easy preparation, high activity and durable stability.
研究领域:
材料科学
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电化学
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纳米技术
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2014
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IF 6.007
Moa Z. Granlund,Kjell Jansson,Marita Nilsson,Jazaer Dawody,Lars J. Pettersson
The objective of this paper was to study the influence three promoters (Co, La, Mn) had on the catalytic activity of Rh-based catalysts for autothermal reforming of diesel. The catalysts were supported on CeO 2 -ZrO 2 and the loading was 1 wt.% Rh and 6 wt.% promoter. The catalytic activity was evaluated in a monolith bench scale reactor with Swedish Environmental diesel, MK1. The process parameters employed at the ATR experiments were; O 2 /C ∼ 0.45, H 2 O/C ∼ 2.5 and GHSV ∼ 50,000 h −1 , meanwhile the reactor temperature was ramped from 700 °C to 950 °C. The catalysts were compared based on their fuel conversion, H 2 yield and the selectivity of different short-chain hydrocarbons. The results showed that all three catalysts had both high fuel conversion and H 2 yield in the optimal ATR operation temperatures. The H 2 yield and fuel conversion were increasing in the order Rh/Mn, Rh/La, Rh/Co. To get further insight in the difference between the materials the fresh and aged catalytic materials were characterized. The characterization methods used were H 2 -temperature programmed reduction (H 2 -TPR), powder X-ray diffraction (XRD), and BET surface measurements. The BET surface measurements showed that promotion with La gave improved thermal stability of the material. The XRD showed a high dispersion of all metals except Co, which was present as crystals in the size range of the particles of the support.
研究领域:
催化
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化学工程
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环境科学
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DOI
高影响因子
Science of Advanced Materials
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2015
·Vol. 7
·期 12
·2508-2514
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IF 2.598
Zhong Suni,Chen Yanzhong,Song Fenyun,Tian Yong,Wang Xiufang
The synthesis of magnetic mesoporous carbon spheres (FeMCs) with sucrose, silica, and hydrated iron nitrite Fe(NO3)3 · 9H2O under neutral conditions was achieved by the ultrasonication method. Indomethacin (INC) was selected as the model drug.
FeMCs before and after INC-loading FeMCs were characterized by scanning electron microscopy (SEM), wide-angle X-ray diffraction (WXRD), nitrogen sorption isotherms, and differential scanning calorimetry (DSC). Release tests were conducted to confirm improvements in drug release kinetics. The
experimental results showed that the mesoporous carbon spheres exhibited BET surface areas of 615–876 m2/g and pore volumes of 1.36–2.25 cm3/g. INC showed an amorphous state after it was incorporated into the mesoporous channels of the FeMCs. Release kinetics
revealed that the release rate of INC from FeMCs was significantly higher than that of pure INC. This finding may be attributed to the reduced crystallinity of INC in the composites. FeMCs could be exploited as an alternative delivery system for poorly water-soluble indomethacin. The crystallinity
of the loaded drug and the drug release kinetics could be well controlled by FeMCs developed in this method.
研究领域:
材料科学
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药学
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纳米技术
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DOI
高影响因子
Journal of CO2 Utilization
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2020
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IF 5.993
Guangyong Shi,Wei Xu,Jichao Wang,Ye Yuan,Somboon Chaemchuen,Francis Verpoort
The coordination of pyridylcarboxylate (isonicotinic acid, IN) with copper (II) fabricates a Cu(IN)-MOF. The characteristic properties of the Cu(IN)-MOF are obtained via different analysis techniques such as XRD, SEM, BET, ICP, TG, etc. The advantage of copper(II) coordinated with a bi-functional organic linker (IN), containing a pyridyl and carboxylate group, is demonstrated by the chemical properties of which the Cu(II)-based MOF exhibits excellent catalytic performance for the CO 2 carboxylation of terminal alkynes. No noble-metal, co-catalyst, or additives are required to execute the reaction. The effectiveness of the Cu(IN)-MOF was demonstrated with a variety of substrates (>11). Moreover, the Cu(IN)-MOF, as a heterogeneous catalyst, can be recycled at least 5 times retaining its excellent catalytic performance. Herein, we report the first copper (II) metal-organic framework (Cu(IN)-MOF) applied for the carboxylation of alkynes with CO 2 demonstrating several advantages such as stable catalyst, avoiding the use of an expensive noble-metal, straightforward synthesis.
研究领域:
材料科学
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催化
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化学工程
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无机化学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2021
·
IF 9.381
Yuyang Wu,Xincheng Jiang,Jiangya Ma,Jingbo Wen,Shuang Liu,Hongxia Liu,Huaili Zheng
A kind of starch-based flocculant (starch- graft -poly[(2-methacryloyloxyethyl) trimethyl ammonium chloride], denoted St-g-PDMC-LPUV) has been synthesized by low-pressure ultraviolet initiation and was employed to remove humic acid (HA) for water purification . The physicochemical characteristics of starch and St-g-PDMC-LPUV were characterized by FT-IR, 1 H NMR, XRD, TGA , SEM and BET to confirmed the successful grafting DMC onto starch. Effects of flocculant dosage, pH, the adding amount of Fe 3 O 4 , initial HA concentration and stirring speed were investigated systematically. The prepared St-g-PDMC-LPUV flocculant with non-toxic, biodegradability and environmental friendliness exhibited effective performance for removing HA from water in a wide pH range (5–10). The flocculation mechanism was attributed to the effective collision between function groups of the St-g-PDMC-LPUV flocculant and HA by charge neutralization, adsorption, bridging and patching.
研究领域:
环境科学
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化学工程
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材料科学
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水处理
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Qionghao Wang,Yaqi Peng,Min Chen,Mengxia Xu,Jiamin Ding,Qi Yao,Shengyong Lu
The process of urbanization has resulted in a continuous growth of the production of municipal solid waste , consequently leading to the increase of municipal solid waste incineration fly ash (MSWI FA) over time. This has prompted the need for effective disposal and value-added utilization strategies for MSWI FA. In this study, a hydrothermal method was employed to synthesize Ca Al layered double hydroxides (LDHs) using MSWI FA as the raw material. The main objective was to investigate how different synthesis parameters affect the crystallinity of the layered bimetallic hydroxides. Subsequently, the synthesized LDHs were characterized using various techniques such as BET, SEM , XRD, FT-IR, and XPS. The results revealed the presence of calcium and aluminum cations in the interlayer region of the synthesized material, with chloride ions, sulfate ions, and acetate ions being the predominant anions. Moreover, the formation of LDHs presents an effective approach for the self-purification of leachates derived from MSWI FA. The LDHs exhibited excellent adsorption capacity for Cd 2+ and Cu 2+ in wastewater, with maximum values of 730 mg·g −1 and 446 mg·g −1 , respectively. The adsorption mechanisms involved isomorphous substitution, complexation, as well as the precipitation of hydroxides or interlayer anions. This method presents a novel approach for effectively utilizing MSWI FA to produce environmentally friendly value-added adsorbents.
研究领域:
环境科学
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废物管理
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材料科学
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化学工程
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Mengshuo Du,Youyu Cao,Xueli Luo,Weixia Yang,Wanmei Lin,Yingying Wang,Wenzhi Tang,Zhonghong Li
Threats caused by heavy metal ions have prompted people to develop porous and functionalized materials to remove them. Metal–organic frameworks (MOFs) show potential for heavy metal ions removal due to the high specific surface area, tunable pore size, flexible designability and favorable stability. However, the intrinsic microporous structure and powder form limit their applications. Herein, we designed a shapeable aerogel bead incorporated with L-cysteine-modified defective UiO-67 for Pb(II), Cd(II) and Cu(II) adsorption. The pristine UiO-67 powders were firstly modified by introducing the modulator (octanoic acid) and an extra ligand (2,2′-bipyridine-5,5′-dicarboxylic acid) to construct defects, both of them competed with the original ligand to coordinate to Zr clusters, resulting in an increased BET surface area (from 337.66 to 1,037.14 m 2 /g) and mesoporous ratio (from 34 % to 74 %) of the pristine UiO-67. Then, the graft of L-cysteine containing –COOH and –SH introduced more active adsorption sites. Moreover, the powder material was incorporated into sodium alginate aerogel beads which enhanced the recyclability and further improved the adsorption capacity for Pb(II), Cd(II) and Cu(II). These appealing advantages endow the adsorbent with quicker adsorption equilibrium (240 min), and outstanding removal capacities for Pb(II) of 661.2 mg/g, Cd(II) of 296.2 mg/g and Cu(II) of 326.4 mg/g. The chelation and ions exchange between the numerous functional groups including –COOH, –OH and –SH and the heavy metal ions are the main mechanisms for effective adsorption. This work provided a novel approach for the application of MOFs in environmental remediation.
研究领域:
环境科学
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材料科学
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化学工程
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水处理
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产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Yuchun Ji,Zhengde Li,Laiping Zhang,Jilin Wang,Wenbiao Li,Wenzhuo Chen,Guoyuan Zheng,Fei Long,Zhengguang Zou
In this paper, a novel boron nitride hollow microtube (BNHM) structure by annealing assisted high-pressure etching method. The products were characterized by XRD , FTIR, Raman, XPS , SEM, TEM, TGA , BET, UV–vis, and PL. The result shows that the sample displayed a one-dimensional hollow tube structure directionally covered with nanosheets . The average inner diameter of the hollow tube is 1 µm with a length of 2–4.5 µm. And the wall thickness of the hollow tube structure is about 100 nm. In addition, the band gap value of the sample is 5.51 eV presenting the strongest absorption peak at 225 nm. The specific surface area of the sample is 272.6 m 2 ·g −1 , showing good adsorption efficiency on Congo red (absorbed 75% in 5 min). Meanwhile, the possible growth mechanism of BNHM is also discussed.
研究领域:
材料科学
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纳米技术
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化学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Jianwen Lai,Peiyue Wang,Hongbo Qi,Yunfeng Ma,Zhongkang Han,Fiedler Heidelore,Xiaodong Li,Xiaoqing Lin
Calcium oxide (CaO), utilized in semi-dry/dry desulfurization systems at municipal solid waste incineration (MSWI) plants, demonstrates some capability to remove polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). This study assessed the gas-phase PCDD/F removal performance of CaO, activated carbon (AC) and CaO-AC mixtures. Alone, CaO achieved removal efficiencies of only 31.9% for mass and 50.8% for I-TEQ concentration. However, CaO-AC mixtures exhibited significantly higher efficiencies, reaching 96.0% and 92.5% for mass and I-TEQ concentrations, respectively, surpassing those of AC alone, which were 74.7% and 58.5%. BET analysis indicated that CaO’s limited surface area and pore structure are major constraints on its adsorption performance. Density functional theory (DFT) calculations revealed that the π-π electron donor-acceptor (EDA) interaction enhances the adsorption between AC and PCDD/F, with adsorption energies ranging from -1.02 to -1.24 eV. Additionally, the induced dipole interactions between CaO and PCDD/F contribute to adsorption energies ranging from -1.13 to -1.43 eV. Moreover, with increasing chlorination levels, PCDD/F molecules are more predisposed to accept electron transfers from the surfaces of AC or CaO, thereby facilitating adsorption. The calculation for mixed AC and CaO showed that CaO modifies AC’s properties, enhancing its ability to adsorb gas phase PCDD/Fs, with the higher adsorption energy and more electrons transfer, aligning with gas phase PCDD/Fs adsorption experiments. This study provides a comprehensive understanding of how CaO influences the PCDD/F adsorption performance of AC.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Wei Liu,Junzhang Wang,Jintian Wang,Xingzhong Guo,Hui Yang
Three-dimensional (3D) Nitrogen-doped carbon coated hierarchically porous silicon (hp-Si@NC) composite with cocontinuous skeletons and abundant interconnected macropores was prepared by a sol-gel route, followed by a magnesiothermic reduction and a polydopamine pyrolyzation. The BET specific surface area and pore volume of the obtained hp-Si@NC composite are calculated to be around 220.4 m 2 ·g ─1 and 0.247 cm 3 ·g ─1 , respectively. Both hierarchically porous Si monolith and hp-Si@NC composite possess great electrochemical performances. The hierarchically porous Si monolith exhibits an initial discharge and charge capacity of about 1943 and 1621 mAh·g ─1 , and maintains a reversible capacity of about 125 mAh·g ─1 in the 100th cycle. The hp-Si@NC composite reveals a discharge capacity of about 1077 mAh·g ─1 and a charge capacity of 723 mAh·g ─1 in the first cycle, and a reversible capacity of around 700 mAh·g ─1 remains after 100 cycles. The coulombic efficiency increases from 67.1% in the first cycle to 97% in the second cycle and to 99% in the 100th cycle, with a great rate performance. All these favorable electrochemical characterizations benefit from unique pore structure and N-doped carbon layer. The hp-Si@NC composite obtained by integrating with sol-gel process, magnesiothermic reduction and polydopamine pyrolyzation can be promisingly applied as an anode in Li-ion batteries with a bright prospect.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）