SYNTHETIC METALS
·
2021
·
IF 3.266
Ruixue Wu,Caifeng Bi,Lulu Wang,Jinmiao Wang,Chuanbin Fan,Nana Li,Mei Wang,Feng Shao,Guobo Chen,Yuhua Fan
In this work, five novel Cd/Zn-based MOFs with different topological framework, namely {[Cd(bimb)(Hbipa)]·H 2 O} n (1), {[Cd 3 (dimb) 3 (bipa) 2 (H 2 O) 2 ]·2H 2 O} n (2) , [Cd(bimd)(Hbipa)(H 2 O)] n (3) , {[Zn(bipd)(Hbipa)]·H 2 O} n (4) and [Zn(bimb)(Hbipa)] n (5) had been synthesized and characterized. Worth noting, Complex 1 and 2 had effective separation behaviors towards MO and MBE dyes respectively, which could reach the adsorption equilibrium within a quite short time even if there existed another kind of dye in the system. Meanwhile, Complex 3 – 5 showed great performance in CR adsorption. Additionally, Complex 3 – 5 also showed excellent photocatalytic degradation capabilities toward MB and MV dyes under UV irradiation. According to the study, these five metal-organic frameworks can be used as a kind of functional materials in the adsorption and photocatalytic degradation of organic dyes in wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Jianfang Jiang,Kuaqian Deng,Fanglin Dao,Panyang Li,Jiali Huang
Trichlorfon (TCF) is an important chemical for pest and parasite control, but it poses risks to public and environmental health. Thus, the detection of TCF is of great value. In this study, we report a strategy to prepare an AChE-nanoprobe for detecting TCF. Benefiting from the unique and excellent structure of CHO-β-CD, this AChE-nanoprobe can wrap nano-Fe 3 O 4 and covalently bind AChE. As a proof of concept, we prepared an AChE-nanoprobe with a hydrated particle size of 717 nm and a saturation magnetic strength of 64.11 emu/g Fe. The properties were studied in detail. Its catalytic activity was 90 % of that of free AChE, and it had broadened pH, thermal, organic solvents and storage in addition to good reusability, with a residual catalytic activity of 42 % after the 10th cycle and a cumulative catalytic activity 6.9 times higher than that of the free enzyme. The AChE-nanoprobe exhibited good performance in TCF detection; the linear range of TCF was 40–4000 ng/L, and the limit of detection for TCF was 2.8 ng/L. Furthermore, our results suggest that the AChE-nanoprobe has several attractive features, such as easy preparation, outstanding stability and reusability, providing a novel and promising tool for the analysis of TCF.
研究领域:
环境科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Huanhuan Xing,Sipeng Tian,Zihan Zhou,Zihang Zhang,Chunmei Zhang,Shan Zhang,Jian Lin,Chunxian Guo,Erkang Wang,Jing Li
The design and synthesis of high-efficiency electrochemiluminescence (ECL) emitters hold great promise for a wide range of analytical applications. In this study, we developed a rapid and straightforward strategy to fabricate a self-luminous Cd-based metal–organic framework (Cd-MOF) using individual aggregation-induced emission ligands, specifically 1,1,2,2-tetrakis(4-(pyridin-4-yl)phenyl)ethane (TPPE), within a few seconds. The rigid and directionally enriched metal node of Cd, along with the organic ligands, is formed within the Cd-MOF via coordination, effectively constraining the intramolecular free motions of TPPE and suppressing nonradiative relaxation. Additionally, the unique porous structure combined with the catalytic activity resulting from the incorporation of Cd2+, endow the Cd-MOF with 90-fold ECL enhancement compared to individual TPPE as more chromophores are electro-excited and more coreactants are catalyzed to produce luminescence. The as-made Cd-MOF amplifies the ECL performance by integrating ECL emitters and coreactant accelerators into a single entity, simplifying the sensing process. Leveraging the excellent ECL performance, we constructed a sensitive ECL sensor for hydroquinone based on competitive reactions, with a wide linear range from 200 nM to 1 mM and a satisfying detection limit as low as 80 nM.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Luhong Zhang,Hongfang Guan,Na Zhang,Bin Jiang,Yongli Sun,Na Yang
In this study, a high flux loose nanofiltration (NF) membrane was fabricated for the desalination of dye wastewater through a facile method which combined doping and surface grafting. First, PES ultrafiltration substrate was prepared via non-solvent induced phase separation by introducing multi-hydroxyl β-cyclodextrin (β-CD) into the casting solution as hydrophilic additive. Then, titanium dioxide (TiO 2 ) nanoparticles were grafted uniformly on membrane surface with the assistance of 1, 6-hexamethylene diisocyanate (HMDI), resulting in the enhancement of surface hydrophilicity and separation performance of the resultant membranes. Remarkably, the membrane prepared at optimized conditions achieved a high pure water flux (52.0 L·m −2 ·h −1 at 0.2 MPa) and high permeate flux for dyes (e.g. 30.5 L·m −2 ·h −1 for Congo Red at 0.2 MPa). It also exhibited high rejection for dyes (e.g. 97.4% for Congo Red) and high transmittance of salts (e.g. 94.0% for Na 2 SO 4 ). Moreover, the membrane possessed good antifouling performance with a high flux recovery ratio of 93.7% after fouled by humic acid (HA). The results indicated that the novel loose NF membrane had an impressive potential application for dye wastewater treatment.
研究领域:
膜科学
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环境工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Yuan Dang,Xiaojiao Wang,Rongrong Cui,Shuangli Chen,Yuanzhen Zhou
A sensitive and selective electrochemical sensor based on poly-(nicotinic acid) (PNA) film and Cd-doped ZnWO 4 (Cd-ZnWO 4 ) nanoneedles organic-inorganic nanocomposite modified carbon paste electrodes (PNA(ii)/Cd(0.02)-ZnWO 4 /CPE) is successfully constructed and applied to study the catalytic oxidation of hydroquinone (HQ) and catechol (CC). X-ray diffraction (XRD), scanning electron microscope (SEM) and electrochemical techniques are used to characterize the composition , morphology and electrochemical properties of the modified electrode . The sensor exhibits strong electrocatalytical activity towards the oxidation of HQ and CC for the higher specific surface area of Cd-ZnWO 4 nanoneedles, fluent electron transfer capacity and the synergistic effect of inorganic Cd-ZnWO 4 and organic PNA. Wide linear ranges are obtained as 1–56 μM for HQ and 2–35 μM for CC, with the detection limits of 0.17 μM and 0.03 μM, in the differential pulse voltammetry (DPV) determination of HQ and CC, respectively. Satisfactory repeatability, stability and anti-interference performance are also achieved on PNA (ii)/Cd(0.02)-ZnWO 4 /CPE. Meanwhile, the proposed sensor realizes the detection of CC and HQ spiked in local tap water samples successfully.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xianping Deng,Peiwen Wu,Xiaodong Du,Guining Lu,Yanyan Gong,Zhi Dang,Dongye Zhao
Combined heavy metals and chlorinated organic compounds have been widely reported in industrial wastewater. Yet, simultaneous removal of these contaminants remains challenging. In this study, a bi-functional composite (TNTs@AC) was prepared based on commercial titanium dioxide (TiO 2 ) and activated carbon (AC) and tested for simultaneous removal of Cd(II) and 2-chlorophenol (2-CP). Under the action of high temperature and pressure, TiO 2 was transformed into titanate nanotubes (TNTs) and bound to AC, and in the meanwhile, nanoscale AC particles were patched on the TNTs. In the mixed TNTs and AC phases, TNTs was responsible for taking up Cd(II), whereas AC for 2-CP. As such, the relative adsorption capacities of the composite for Cd(II) and 2-CP varied with the mass ratio of TiO 2 :AC, with decent uptakes for both chemicals in the mass ratio rage of 1:3 ∼1:1. TNTs@AC (prepared at TiO 2 :AC = 1:1) demonstrated fast sorption kinetics and high sorption capacities for both Cd(II) and 2-CP, with a maximum Langmuir adsorption capacity of 109 and 52 mg/g, respectively, in the single solute systems. In the binary systems, the adsorption capacity of Cd(II) was not affected by the presence of 2-CP, whereas the presence of Cd(II) slightly increased the uptake of 2-CP in the low Cd concentration domain (final Cd < 7 mg/L) but mildly inhibited the uptake at Cd > 7 mg/L. The dominant adsorption mechanism of Cd(II) was ion exchange between Cd(II) and Na + /H + of the -ONa/H group of TNTs; while AC served as the primary sink for 2-CP via hydrophobic interaction along with some other possible mechanisms such as surface complexation and hole filling. TNTs@AC also performed well under common environmental conditions (pH, common co-ions, and dissolved organic matter). The formation of mixed TNTs and AC microphases appears promising for simultaneous removal of heavy metals and organic compounds from contaminated water.
研究领域:
环境科学
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水处理
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Food Bioscience
·
2022
·
IF 5.318
Chen Shen,Wenqing Chen,Changzhu Li,Yong Ye,Haiying Cui,Lin Lin
As a nutritious cold chain food , cheese is susceptible to Listeria monocytogenes contamination. In order to prevent and control Listeria monocytogenes in cheese safely and efficiently, maintain the sensory quality during sale, this paper developed a novel nanofiber membrane with good mechanical strength, hydrophobicity , thermal stability , release performance and bacteriostatic performance as food active packaging. In this study, zein was introduced and electrospun to form a reliable carrier to embed and deliver citral in the cavity of HP-β-CD (Hydroxypropyl-β-cyclodextrin). We found that the zein-based nanofiber membranes showed preferable tensile properties and hydrophobicity with 4% (w:v) addition of citral/HP-β-CD inclusion complex. Meanwhile, the thermal stability and release property of citral were significantly improved by embedding in HP-β-CD and loading into zein-base nanofiber membranes. Moreover, after packaged by Zein nanofiber membrane encapsulated with citral/HP-β-CD inclusion complex under the storage conditions of 4 °C and 12 °C, the growth of Listeria monocytogenes in four kinds of cheeses was inhibited to a certain degree. The texture and sensory quality of the four cheeses at the two temperatures and the color quality under the low temperature condition of 4 °C did not change significantly. In summary, Zein nanofiber membranes encapsulated with citral/HP-β-CD inclusion complex has potential application prospects in the field of food active packaging.
研究领域:
食品科学
·
包装工程
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 12
·2102423
·
IF 6.389
Guihao Zhong,Dingxin Liu
Photocatalytic splitting of water into hydrogen has attracted growing concerns as a promising strategy for the development of clean and renewable energy sources. Fabricating novel photocatalysts with high H 2 evolution rate and good cyclic stability is extremely vital for practical applications. Herein, a novel CdS/Cd 2 SO 4 (OH) 2 composite derived from cadmium nitrate doped Cd-MOF is deposited on the surface of butterfly wings with reticular hierarchical structure for efficient hydrogen evolution reaction. The combination of unique hierarchical structure and MOF-derived CdS nanoparticles endows them with strong light absorbability, small band gap, and superior photogenerated charges separation efficiency, leading to excellent photocatalytic efficiency. Furthermore, in-depth measurements reveal the reduction of Cd 2 SO 4 (OH) 2 to Cd on the surface of CdS particle during the photocatalytic process. The obtained Cd metal can act as the electron trap to improve the charge separation efficiency and further promote the hydrogen production performance. As a result, the MOF-derived CdS/Cd 2 SO 4 (OH) 2 and final CdS/Cd systems with reticular hierarchical structure exhibit significantly enhanced hydrogen production performance compared with CdS/Cd 2 SO 4 (OH) 2 powder and MOF-derived CdS nanoparticles under visible light irradiation. It is expected that this synthetic approach can be used to fabricate other composite photocatalyst materials with reticular hierarchical structure for efficient water splitting to hydrogen.
研究领域:
材料科学
·
能源转换与存储
·
纳米技术
·
光化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jianrong Guo,Juan Wu,Junhui He,Yan Xue
As cadmium ions (Cd 2+ ) pose a serious threat to environment and human health, it is significant to develop portable, fast-response and sensitive Cd 2+ sensors for both real-time and on-site collection of such critical information. In this study, nearly monodisperse ZnS nanoparticles (NPs) were prepared and used to recognize, enrich and detect Cd 2+ ions. ZnS NPs demonstrated fast adsorption kinetics towards Cd 2+ ions (removing 99.3 % of Cd 2+ in 12 min), surpassing previously reported multiple Cd 2+ adsorption materials. Upon adsorbing Cu 2+ and Cd 2+ ions via substitution reaction, ZnS NPs gain strong peroxidase activity, and demonstrate the ability to selectively detect Cu 2+ and Cd 2+ ions among common metal ions . By further conjugating with our previous HSnS NFs (Hollow SnS nanoflower) nanosensor to eliminate the interference of Cu 2+ , the ZnS NPs nanosensor could selectively detect Cd 2+ ions with recoveries above 80 %. The ZnS NPs nanosensor can cover a wide range of Cd 2+ concentration from 0.5 to 100 μg L −1 with an extremely low detection limit of 0.38 μg L −1 . When coupling to a portable RGB sensor, as low as 0.5 μg L −1 Cd 2+ ions could be reached on-site for river water, giving an outstanding recovery of 99.4 %. The current results provide a new avenue to the on-site detection of Cd 2+ ions, and would doubtlessly contribute to the future construction of portable and intelligent sensor arrays towards complex environmental samples.
研究领域:
环境科学
·
分析化学
·
纳米技术
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Bo Wang,Sha He,Wenhui Feng,Lulu Zhang,Xueyan Huang,Kaiqiang Wang,Shiying Zhang,Ping Liu
Non-noble metal Cd nanoparticles, as an efficient cocatalyst, are successfully constructed onto the surface of hexagonal CdS nanorods (CdS NRs) for the photocatalytic hydrogen evolution reaction by a facile in situ chemical reduction approach based on a thermal treatment process. The in situ introduction of Cd can significantly improve the photocatalytic H 2 production performance of CdS NRs in sodium sulfide and sodium sulfite aqueous solutions under visible light irradiation. The superior electrical conductivity of metallic Cd and the intimate interfacial contact between Cd and CdS NRs are suggested to account for the enhanced light absorption intensity, more efficient charge separation, and faster interfacial charge migration, resulting in the dramatically promoted photocatalytic H 2 production activity. This work provides a new route for the in situ deposition of Cd nanoparticles onto CdS and other Cd-containing semiconductor photocatalysts with desired morphologies.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 2
·期 8
·2599-2608
·
IF 0
Xingqi Wang,Wenxia Liu,Jian Tian,Zhenhuan Zhao,Pin Hao,Xueliang Kang,Yuanhua Sang,Hong Liu
Uniform well-defined nanostructured BiOBr microspheres have been fabricated via a simple hydrothermal method in the presence of cetyltrimethylammonium bromide (CTAB) and ethylene glycol (EG). The heavy metal ion adsorption on the as-synthesized nanostructured BiOBr microspheres was systematically assessed by measuring the residual concentration during the adsorption process using a colorimetric method for Cr(VI) concentration, and an extraction-colorimetric method for Cd(II) and Pb(II) concentrations. The nanostructured BiOBr microspheres showed good removal capacity for heavy metal ions (Cr, Cd, Pb), and excellent adsorption properties for low concentration heavy metal ions, indicating potential applications in water purification. Based on the quick and efficient heavy metal ion removal ability of nanostructured BiOBr microspheres, a continuous filtering-type water purification device was designed and constructed. In using this continuous filtering type water purification device, 1 g of adsorbent can purify about 4900 g of Pb(II) contaminated water, 5900 g of Cd(II) contaminated water, or 21 500 g of Cr(VI) contaminated water having initial concentrations of 200 μg L−1 to successfully attain the World Health Organization standard for drinking water. The good removal capacity can be attributed to the hierarchical nanostructure, which displays a large specific surface area and strong adsorption of heavy metal ions.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2021
·Vol. 68
·期 9
·1654-1662
·
IF 1.967
Mei-Ling Chen,Wang Wang,Ling Xu,Jin-Feng Zhu
Reactions of polycarboxylate ligand (2,2′-H 2 bpdc or H 3 OABDC), N-donor auxiliary ligand (4-bpmh) with Cd(II) salts under solvothermal conditions resulted in two coordination polymers formulated as [Cd(2,2′-bpdc)(4-bpmh)(H 2 O)] n ·n(H 2 O) ( 1 ) and [Cd 3 (OABDC) 2 (4-bpmh) 2 (H 2 O) 4 ] n ·2n(H 2 O) ( 2 ) (2,2′-H 2 bpdc = diphenic acid, H 3 OABDC = 5-oxyacetate isophthalic acid, and 4-bpmh is N,N-bis-pyridin-4-ylmethylene-hydrazine). Meanwhile, the investigations of luminescent performances and thermal stabilities suggest that the two compounds are candidate materials for the fluorescent emitting material. The assessment of their application values on the infantile bronchial pneumonia was carried out and their specific mechanism was investigated in the meantime.
研究领域:
配位化学
·
医学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）