JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Zhenkai Wang,Yifan Li,Yanfang Su,Sheng-Peng Sun,Xiaoning Wang,Zhangxiong Wu,Winston Duo Wu,Xiao Dong Chen
Catalytic membrane integrating membrane filtration and advanced oxidation in one single-step is promising in addressing emerging micropollutants issue in water, the challenges in catalytic activity and stability still limit their practical application. This study successfully anchored highly stable Fe–Mn bimetallic catalyst (FMBC) in Al 2 O 3 -based microfiltration and ultrafiltration ceramic membranes channel (named as FMBC@Al 2 O 3 -MF or UF) via a novel in situ fabrication strategy. Characterization results revealed that FMBC was anchored on the membrane channel wall of Al 2 O 3 -MF/UF, which enabled boosting Oxone activation to generate sulfate radical and hydroxyl radical at circumneutral pH (e.g., 7.0–9.0) and with great stability. Notably, FMBC@Al 2 O 3 -UF exhibited a remarkable activity and anti-interference capability in actual water matrices, which resulted in efficient degradation of emerging micropollutants such as carbamazepine, crotamiton, diethyltoluamide, gemfibrozil and ibuprofen in lake water and municipal wastewater treatment plant secondary effluent at environmentally relevant concentrations. Moreover, FMBC@Al 2 O 3 -MF/UF also displayed high cleaning efficiency toward natural organic matter (NOM) and effluent organic matter (EfOM) fouling via Oxone activation. Besides, the intermediates of carbamazepine degradation were identified, and most of them had decreased aquatic toxicity based on Ecological Structure Activity Relationship (ECOSAR) prediction. The high activity, stability and environmentally friendly property of the as-prepared FMBC@Al 2 O 3 -MF/UF make them promising application for advanced treatment of emerging micropollutants in water.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Jiahui Zhang,Hongyi Zhang,Zhen Chen,Zhenghua Zhang
Pervasive exposure to different micropollutants (e.g. endocrine disrupting chemicals and pharmaceuticals) present in water environments, presents a notable risk to public health. Herein, three Co-based bimetallic layered double hydroxides (LDHs) were fabricated, then assembled into LDH-based nanoconfined catalytic membranes (CoM m , M: Fe, Mn, and Cu) with similar structural and physicochemical properties. The micropollutant removal performance of CoM m in the presence of peroxymonosulfate (PMS) was ranked in the order: CoMn m > CoFe m > CoCu m . The CoMn m achieved a 100% removal efficiency for pharmaceuticals and endocrine disrupting chemicals, achieving a first-order rate constant (1.64 ms −1 for ranitidine) that was 10 2 –10 6 higher than traditional LDH catalysts. Density functional theory (DFT) results revealed that CoMn m possessed the highest adsorption energy with PMS and d-band centre, exhibiting superior chemisorption activity and faster charge transfer than the other prepared membranes. Furthermore, the nanoconfinement effect within membrane nanochannels contributed to the outstanding performance of CoMn m . This study provides an atomic-scale understanding of the catalytic mechanisms of CoM m , guiding the design and optimization of catalytic membranes for water purification.
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 28
·21504-21510
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IF 3.84
Xiaojuan Zhao,Fengxia Li,Qingyan Zhang,Zengbo Li,Yehong Zhou,Jun Yang,Chuan Dong,Junping Wang,Shaomin Shuang
Mn-doped ZnS quantum dots capped with 3-mercaptopropionic acid (MPA) were synthesized by a facile method in aqueous solution as a ratiometric fluorescent (I590 nm/I458 nm) probe for curcumin. Curcumin caused defect-related fluorescence quenching of the probe at 458 nm, whereas the orange transition emission of the probe at 590 nm changed only negligibly with variations in curcumin concentration. The MPA-assembled Mn-doped ZnS quantum dots were used for the simple, sensitive and non-toxic determination of curcumin. Under the optimized conditions, the response to curcumin was linear in the range 0.16–16.9 μM with a detection limit of 37 nM. The method was successfully applied to the determination of trace amounts of curcumin in urine samples with recoveries of 97.73–109.73%.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2024
·
IF 3.7
Dandan Zhou,Shilong Li,Luyi Chai,Jian Lu,Tianxiang Yu,Yuqing Sun,Wenheng Jing
ABSTRACT Two-dimensional (2D) catalytic ozonation membranes are promising for the treatment of micropollutants in wastewater due to simultaneous ozone-catalyzed degradation and membrane filtration processes. However, it remains challenging for 2D catalytic ozonation membranes to efficiently degrade micropollutants due to low mass-transfer efficiency and poor catalytic activity. Herein, Fe/Mn bimetallic metal–organic framework (MOF) intercalated lamellar MnO 2 membranes with fast and robust ozone-catalyzed mass-transfer channels were developed on the surface of the hollow fiber ceramic membrane (HFCM) to obtain 2D Fe/Mn-MOF@MnO 2 -HFCM for efficiently degrading micropollutants in wastewater. The intercalation of Fe/Mn-MOF expanded the interlayer spacing of the MnO 2 membrane, thereby providing abundant transport channels for rapid passage of water. More notably, the Fe/Mn-MOF provided enriched reactive sites as well as high electron transfer efficiency based on the redox cycling between Mn 3+ /Mn 4+ and Fe 2+ /Fe 3+ , ensuring the effective catalytic oxidative degradation of micropollutants including tetracycline hydrochloride (TCH), methylene blue, and methyl blue. Moreover, the carboxyl groups on the MOF formed covalent bonds (–COO–) with the hydroxyl groups in MnO 2 between layers, which increased the interaction between MnO 2 nanosheets to form stable interlayer channels. Specifically, the optimal composite membrane achieved a high removal rate of TCH micropollutant (93.4%), high water treatment capacity (282 L·m –2 ·h –1 ·MPa –1 ), and excellent long-term stability (1200 min). This study provides a simple and easily scalable strategy to construct fast, efficient, and stable 2D catalytic mass-transfer channels for the efficient treatment of micropollutants in wastewater.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Xinyue Gu,Minghua Li,Ya Yan,Julian Miao
The convenience and high efficiency of recently developed I–III–VI group AgInS 2 (AIS) fluorescence sensors have garnered considerable attention. In this study, glutathione (GSH) was employed as a stabilizer to synthesize Mn doped AgInS 2 quantum dots (Mn-AIS QDs) via a one-step hydrothermal method at a lower temperature. The resultant samples displayed favorable photoluminescent characteristics and excellent water dispersibility. The photoluminescence of Mn-AIS QDs is quenched by Fe (III) via a photo-induced electron transfer mechanism (PET), and this quenching can be reversed by ascorbic acid (AA) as a result of the redox reaction between the Mn-AIS-Fe (III) complex and AA. Utilizing the on–off–on fluorescence principle, a fluorescence switch sensor based on Mn-AIS QDs was developed for the detection of Fe (III) and AA. The linear range for the detection of Fe (III) using the Mn-AIS QDs sensor was established to be 0.03–120 µM, with a detection limit (LOD) of 0.16 nM. For the detection of AA within the Mn-AIS-Fe (III) system, the linear range spanned from 0.05 to 180 µM, with a LOD of 0.031 µM. Both Mn-AIS and Mn-AIS-Fe (III) demonstrated robust anti-interference properties, facilitating the accurate detection of Fe (III) in tap water and AA in vitamin C tablets. This approach is notable for its simplicity, cost-effectiveness, and considerable potential for application in the creation of innovative biological and environmental sensors.
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PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2016
·
IF 9.407
Chunwei Dong,Dong Yao,Jianyou Feng,Tingting Huang,Xiyu Hu,Zhennan Wu,Yi Liu,Bai Yang,Hao Zhang
Hollow nanostructures have shown charming properties beyond their solid counterparts, but the synthesis of multinary chalcogenide semiconductors with hollow nanostructures remains challenging, because of their complex components. In this work, we demonstrate a facile one-pot method to synthesize Cu2GeS3 hollow nanoparticles (NPs) based on Kirkendall effect by using dissolved GeO2 as the Ge source. A theory model according to the diffusion kinetic and reaction kinetic is established to investigate the growth mechanism of Cu2GeS3 hollow NPs. By using Cu2GeS3 hollow NPs as the template, quaternary Cu2MGeS4 (M = Zn, Ni, Co, Fe and Mn) hollow NPs are further produced, which are more difficult to prepare, because of their excessive ion species. Furthermore, Cu2GeS3 hollow NP-based gas sensors are prepared, which exhibit outstanding sensitivity for the detection of ethanol gas, because of their large surface-to-volume ratio and small grain size.
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高影响因子
RSC Advances
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2016
·Vol. 6
·期 56
·50985-50992
·
IF 3.289
Ruo-Mei Wang,Qian Liu,Yu Zhang,Zhangyong Hong,He-Fang Wang
Smart drug carriers with intrinsic photoluminescence (PL) tracking of controllably released drugs are of great significance to indicate in real-time where, when and how the drug was released. Herein, we present a novel multifunctional poly(N-isopropylacrylamide)–Mn–ZnS (PMZS) nanocomposite for thermo- and pH-controlled release of doxorubicin (Dox) and real-time tracking of the released Dox in a PL-enhanced manner. The simple coupling of Mn–ZnS quantum dots and poly(N-isopropylacrylamide) resulted in the unique thermo- and pH-responsive PL of PMZS. There was a much higher PL intensity at 37 °C than 25 °C and a much higher PL intensity at weakly acidic pH than at neutral pH, which is promising for PL imaging in tumor microenvironments. The PL of the PMZS composite was greatly quenched upon loading of Dox (the loading content and encapsulation efficiency of PMZS composites toward Dox were 15.2% and 84.1%, respectively), but was gradually restored with the controllable release of Dox, and the restored PL intensity was proportional to the cumulative amount of Dox released. The versatility of the PMZS composite as an effective Dox carrier and real-time PL-enhanced tracking of the controllably released Dox were further proved by cell viability assays and in vitro cell imaging experiments. The simple PMZS nanocomposite was easily-synthesized, biocompatible, and promising for PL tracking of when, where and how Dox was released.
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高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
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2016
·Vol. 71
·期 8
·869-874
·
IF 0.686
Gao-Feng Wang,Xiao Zhang,Shu-Wen Sun,Hong Sun,Xia Yang,Hui Li,Chen-Zhong Yao,Shu-Gang Sun,Yu-Peng Tang,Li-Xin Meng
Two Mn(II) complexes, {[Mn(BIPMO) 2 Cl 2 ] · 2(H 2 O)} n ( 1 ) and {[Mn(BIPMO) 2 (SCN) 2 ] · 2(CH 3 OH)} n ( 2 ) (BIPMO = bis(4-(1 H -imidazol-1-yl)phenyl)methanone) with V-shaped BIPMO ligands, were synthesized and characterized by IR spectroscopy and elemental analyses along with their single-crystal X-ray diffraction analyses. The Mn(II) ions in 1 and 2 are both six-coordinated to four nitrogen atoms of four BIPMO ligands and two anions (Cl − for 1 , and SCN − for 2 ) to form a distorted octahedral geometry.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 22
·13425-13434
·
IF 3.269
Tingting Gan,Nanjing Zhao,Gaofang Yin,Mengdi Tu,Jianguo Liu,Wenqing Liu
In this study, highly water-soluble Mn-doped ZnS quantum dots (QDs) capped by 3-mercaptopropionic acid (MPA) were successfully synthesized by three different synthetic methods. By comparison, QDs prepared by hydrothermal synthesis method at 100 °C heating for 2 h had the best phosphorescence emission properties. Room-temperature phosphorescence (RTP) could be remarkably and selectively quenched by Pb2+ in a pH 3.8 NaAc–HAc buffer solution. Based on the abovementioned finding, a simple, sensitive, and selective phosphorescence method for rapid detection of Pb2+ was successfully developed using MPA-capped Mn-doped ZnS QDs as a probe. Under the optimized conditions, the RTP intensity ratio of P0/P had a good linear relationship with Pb2+ concentration in the concentration ranges of 4 × 10−8–90 × 10−8 mol L−1 and 90 × 10−8–600 × 10−8 mol L−1 with the correlation coefficients of 0.9967 and 0.9970, which well followed the Stern–Volmer quenching equation, and the Stern–Volmer quenching constants were 8.41 × 105 L mol−1 and 3.452 × 106 L mol−1, respectively. The detection limit was 3.69 × 10−8 mol L−1, and the relative standard deviation for 11 repeated detections of 60 × 10−8 mol L−1 Pb2+ was 2.8%. According to the analysis of the Stern–Volmer quenching equation, UV-Vis absorption spectra, decay curves of phosphorescence emission, and phosphorescence lifetime, the quenching mechanism may imply that energy transfer and charge transfer in the interaction of MPA-capped Mn-doped ZnS QDs at the excited state with Pb2+ made QDs lose excitation energy. This resulted in phosphorescence of QDs causing dynamic quenching. The proposed method was successfully applied to detect Pb2+ in real water samples with satisfactory results, and the recoveries ranged from 93% to 109.3%. The developed method was simple, rapid, and specific and could effectively avoid fluorescence interference of the system, which opened up a promising prospect for the sensitive, convenient, and fast sensing and monitoring of small molecule pollutants in water based on phosphorescence sensors.
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Analytical Methods
·
2013
·Vol. 5
·期 21
·5929-5937
·
IF 1.855
Rui Ban,Jingjing Li,Juntao Cao,Penghui Zhang,Jianrong Zhang,Jun-jie Zhu
High-quality glutathione (GSH) capped ZnS : Mn/ZnS core/shell doped quantum dots (d-dots) with pure dopant emission band and excellent stability have been synthesized directly in aqueous media. The influences of experimental variables on the luminescent properties of the ZnS : Mn/ZnS nanocrystals have been investigated. The quantum yield of the dopant Mn photoluminescence in the as-prepared ZnS : Mn/ZnS core/shell d-dots can be up to 27.4%. The value is the highest reported to date for ZnS : Mn d-dots via the direct aqueous synthetic method. Their optical features and structure have been characterized by UV-Visible spectroscopy, photoluminescence (PL) spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD) in detail. Additionally, the stability study against UV irradiation indicated that the obtained d-dots possess excellent photostability. Furthermore, the MTT assay demonstrated that the ZnS : Mn QDs do not exhibit any cytotoxicity toward HeLa cells up to a concentration of 600 μg mL−1. Using the Con A-mannose recognition system as a model, Con A functionalized ZnS : Mn/ZnS nanocrystals were prepared and successfully used for targeted mannosyl groups expression on the HeLa cells surface. Our investigation clearly shows that the GSH capped ZnS : Mn QDs are promising candidates as biological fluorescent labels.
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高影响因子
TALANTA
·
2013
·
IF 3.498
Wei Bian,Jing Ma,Wenrong Guo,Dongtao Lu,Meng Fan,Yanli Wei,Yingfu Li,Shaomin Shuang,Martin M.F. Choi
N -Acetyl-L-cysteine (NAC) and L-cysteine (Cys) capped Mn doped ZnS quantum dots (NAC-Mn/ZnS QDs and Cys-Mn/ZnS QDs) are firstly prepared by hydrothermal methods . These QDs display strong phosphorescence emission peaks at 583 and 580 nm upon excitation at 315 and 306 nm, respectively. Since their room-temperature phosphorescence is efficiently quenched by L-ascorbic acid (AA), they have been employed as phosphorescence probes for detecting AA. The linear working ranges are 2.5–37.5 and 2.5–47.5 µM and the limits of detection are 0.72 and 1.38 µM for NAC-Mn/ZnS QDs and Cys-Mn/ZnS QDs, respectively. The possible quenching mechanisms have been discussed in detail. The QDs probes are highly selective to AA over other common ions, amino acids , glucose and bovine serum album. Finally, they have been applied successfully for detection of AA in human urine samples with satisfactory results. The recoveries are 98–104%. Our work provides a simple and convenient phosphorescence method to determine AA in real samples.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Qing Jin,Yan Li,Jianzhong Huo,Xiaojun Zhao
The phosphorescent 3-mercaptopropionic acid (MPA) capped Mn-doped ZnS quantum dots (MPA-Mn:ZnS QDs)-KMnO 4 hybrid system was developed to be an “off–on” phosphorescent switch based on chemical redox mechanism for detection of glutathione (GSH) in food, wine, and biological samples. By employing KMnO 4 as the quencher to the phosphorescence of MPA-Mn:ZnS QDs, GSH recovered the emission for its determination by the use of its reducibility. The possible mechanism for the restored phosphorescence was elucidated that SO 4 2− oxidized by KMnO 4 on the surface of the Mn:ZnS QDs was reduced to S 2− with the addition of GSH. The phosphorescent hybrid system allowed highly sensitive detection of GSH in aqueous solution with a detection limit of 97 nM and a wide linear range of 0.3–280 μM. The precision for 11 replicate detection of 200 μM GSH was 3.5% (relative standard deviation, RSD). The developed method was applied for the detection of GSH in food, wine, and biological samples with the quantitative spike recoveries from 95% to 104%.
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