CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shiwei Tian,Yaqi Zhang,Qiankun Sha,Xingxiang Zhang,Tian Yang,Xuhuan Yan,Na Han
Polyphenylene sulfide (PPS) microporous membranes have garnered extensive research enthusiasm concerning their outstanding permeation performance and separation accuracy in treating oily wastewater. Nevertheless, the inherent hydrophobic chemical structure, along with the noticeable concentration polarization effect, predisposes them to severe membrane contamination during the separation process. Accordingly, it is desirable to design a PPS self-cleaning membrane with superior anti-fouling capability, fast transport, and remarkable flux recovery. This study marks the first combination of PPS membrane materials with the photo-Fenton process. In detail, the polyphenol (tannic acid, TA)-polycation (polyethyleneimine, PEI)-metal ion (Fe 3+ ) double cross-linking coatings were first assembled on the PPS substrate surface. Subsequently, β-FeOOH photocatalysts were synthesized through in-situ mineralization to further strengthen the hydrophilicity of the membranes. The obtained PPS/TA-PEI/β-FeOOH composite membrane achieved exceptional separation of diverse oil-in-water (O/W) emulsions. The PPS/TA-PEI/β-FeOOH membranes exhibited in-air superhydrophilic and under-water superoleophobicity, exhibiting under-water oil contact angles greater than 151° for diverse oil agents. The fabricated composite membranes displayed high permeability (a flux of the petroleum ether-in-water (P/W) emulsion reached 3400.5 L m −2 h −1 bar −1 driven by a pressure of 0.05 MPa) along with ideal oil rejection (98.6 %). Significantly, the PPS/TA-PEI/β-FeOOH membrane possessed powerful photo-Fenton self-cleaning capability, and its flux recoveries of the contaminated membrane exceeded 90.3 % for varied O/W emulsions after being cleaned by visible light for 10 min. We believe that our research presents a novel approach for the exploitation of PPS-based photo-Fenton self-cleaning membranes, which also exhibit great applicative potential in oily wastewater treatment.
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
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Shuxin Chen,Liting Wang,Wenxiang Ni,Hui Qiu
The self-assembly behavior of the MPNs-based adsorbent is substantially influenced by changes in solution pH. In this study, a highly negatively charged tannic acid‑zirconium (TA-Zr) macromolecular network has been successfully synthesized. As pH increases from 3 to 11, the coordination structure of TA with Zr(IV) changes from mono- to tri-complexation state, resulting in enhanced electronegativity and increased structural stability of tri-complex TA-Zr(9) due to its higher charge density. The TA dissolution experiments and zeta potential measurements confirm this conclusion. The tri-complex TA-Zr(11) underwent structural changes in its macromolecular network due to partial zirconium hydroxide formation under strongly alkaline conditions, as confirmed by X-ray photoelectron spectroscopy analysis, which in turn impacted its stability. Meanwhile, the adsorption capacity of TA-Zr materials for Pb(II) ion increases with the pH of the synthesis solution. XPS analysis suggested that the underlying adsorption mechanism involved ligand exchange between Pb(II) ion and phenolic hydroxyl groups on TA-Zr(9). After batch adsorption-regeneration cycles, TA-Zr(9) could be regenerated with an acidic solution while maintaining consistent Pb(II) ion removal efficiency. Furthermore, TA-Zr(9) effectively treated 12,150 bed volumes (BV) of synthetic water at pH 5.6, which is 18 times more than commercial D001. These results confirm that TA-Zr(9) shows great potential as an effective adsorbentfor Pb(II) removal in practical wastewater treatment, making it a promising candidate for water remediation.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhaohuang Zhong,Xindong Li,Lijinhong Huang,Siwei Yu,Jianghui Jia,Jiaju Huang,Meng Cai,Qinyan Zhu,Luo Bao,Wanfu Huang
Retrieval of rare earth ions from dilute wastewater produced from in-situ leach mining is a crucial approach to effectively mitigate the shortage of rare earth resources, and the employment of the membrane technology for recuperation of ionic rare earths is an energy-efficient and eco-friendly solution. In this study to optimize the use of the membrane technology for ionic rare earths recovery, TA@MOF-808 was fabricated by combining tannic acid (TA) with MOF-808 and then incorporated as nanoparticles into a polyetherimide (PEI) base membrane. On this basis, PA/PEI-TA@MOF-808 thin-film composite membranes were prepared via interfacial polymerization. TA@MOF-808 with its hydroxyl and carboxyl functional groups generated hydrogen and covalent bonds with the secondary amine groups of piperazine (PIP), which stored PIP and regulated its diffusion rate into the organic phase. Thereby, the membrane surface charge was modulated under acidic conditions, and a separation layer was reconstituted, improving the structural and operational stability of the membranes. The PA/PEI-TA@MOF-808 membrane exhibited a water flux of 42.1 L·m −2 ·h −1 , and La 3+ , Y 3+ , and Gd 3+ retention rates of 97.7 %, 96.7 % and 97.4 %, respectively. Separation tests, acid resistance tests, long-term operational stability tests and actual rare earth wastewater treatment tests revealed the PA/PEI-TA@MOF-808 membrane possessed outstanding ionic rare earth separation capability, consistent membrane flux, notable acid resistance, and operational stability, suggesting a bright future in the application for ionic rare earth recovery.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
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IF 9.229
Pi Ding,Zhili Wang,Zeen Wu,Mingchao Hu,Weipei Zhu,Na Sun,Renjun Pei
The majority of current methods of isolating circulating tumor cells (CTCs) rely on a biomarker. However, the isolation efficiency may be compromised due to the heterogeneity of CTCs. In this work, a simple and broad-spectrum method is established to efficiently isolate the heterogeneous CTCs from patient blood samples using tannic acid (TA)-functionalized magnetic nanoparticles (MNPs). The TA-functionalized MNPs (MNPs-TA) inhibit the nonspecific adhesion of peripheral blood mononuclear cell (PBMC) and enhance cancer cell capture, resulting from the unique interaction between TA and glycocalyx on cancer cells. The MNPs-TA was demonstrated to effectively capture seven kinds of cancer cells (HeLa, PC-3, T24, MAD-MB-231, MCF-7, HT1080, A549) from artificial samples (62.3–93.7%). Moreover, this epithelial cell adhesion molecule (EpCAM)-independent CTC isolation method was also tested using clinical blood samples from patients with different cancers (21 patients), which may provide a universal tool to detect CTCs in the clinic.
研究领域:
纳米技术
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肿瘤学
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生物医学工程
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临床研究
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 34
·1-10
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IF 2.8
Huang Chu,Meng Yingzhi,Li Chenlin,Wang Dawei,Chen Xue,Sun Lixian,Peng Biaolin,Lei Xiuyun,Shen Yufang,Liu Laijun
High-performance colossal permittivity ( ε′ > 10 4 ) plays an indispensable role in the development of electronic field. In this work, ultra-high dielectric permittivity ( ε′ > 237, 294 @1 kHz) and low dielectric loss (0.012 @1 kHz) were simultaneously achieved in Ta-doped BaTi 0.995 Ta 0.005 O 3 ceramics. Importantly, the dielectric permittivity changes less than 15% between − 55 and 200 °C, and the dielectric loss is less than 0.04. The excellent giant dielectric performance is related to the defect dipoles of electronic pins associated with electrons/oxygen vacancies/Ti 3+ , which are generated by B-site donor. And the thermal-activated short-range hopping of electrons is conformed to be the origin of low dielectric losses and excellent thermal stability. This work provides a strategy for achieving ultra-high dielectric permittivity, low dielectric loss, and excellent temperature stability of Ta-doped BaTiO 3 simultaneously through B-site defect engineering.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Yi Cao,Piao Ruan,YuFeng Xue,Yue Cao,Huang He,Wenfeng Qiu
Nowadays, materials that possess high activity and natural oxygen vacancy have garnered significant attention as potential electrode materials for supercapacitors . In this study, we successfully prepared the Hf 6 Ta 2 O 17 (HTO) nanofibres (NFs) with an orthorhombic superlattice structure using the electrospinning technique and sintering process. The characterization results indicate that the HTO NFs synthesized at 750 °C show good micro nanostructures and outstanding electrochemical properties . To enhance its energy storage performance, additional oxygen vacancies (OVs) were introduced through a carbothermal treatment under an Ar atmosphere. Although longer reduction reaction times can produce more OVs, the integration of grain boundaries and the growth of grain size caused by large annealing times may limit its electrochemical performance. Therefore, the HTO NFs treated for 1 h (HTO/C-1) exhibited the maximum C s of 925 F·g −1 at 1 A·g −1 with a larger voltage window of 2.1 V. Furthermore, a symmetric supercapacitor fabricated by two reduced HTO NFs electrodes and 1 M Na 2 SO 4 solution, recorded as r-HTO NFs//r-HTO NFs. The device demonstrated excellent energy density of 73.3 Wh·kg −1 (at power density of 1050 W·kg −1 ) and a long cycling life (81.8% retained after 5000 cycles). These results suggest that the optimized reduction process can provide appropriate oxygen vacancies in HTO NFs, thereby effectively enhancing its performance.
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CERAMICS INTERNATIONAL
·
2019
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IF 3.45
Tianhang Zhang,Timothy Daniel Christopher,Saifang Huang,Yan’gai Liu,Wei Gao,Tilo Sӧhnel,Peng Cao
In this work, pressureless sintering (PLS) method was used to prepare Li 7 La 3 Zr 2 O 12 based Al-free garnet electrolytes with the substitution of tantalum (Ta). A series of Ta-doped lithium garnets Li 7- x La 3 Zr 2- x Ta x O 12 (LLZTO, x = 0, 0.25, 0.5, 0.75 and 1.0) were prepared, and the effect of Ta on the structure, densification and ionic conductivity was investigated. Both relative density and ionic conductivity of the LLZTO pellets are dependent on the content of Ta substitution, with the maximum values being reached at x = 0.5. We also studied the stability and degradation mechanism of lithium garnets (Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 ) in humid air with relative humidity of above 70%. It is revealed that after exposure in the humid air for 4 weeks, a layer of LiOH∙H 2 O was observed on the grain boundaries, which lowered its ionic conductivity considerably. In comparison, the pellet stored in a desiccator had clear surface with negligible change in the ionic conductivity.
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高影响因子
Advanced Science
·
2023
·Vol. 10
·期 10
·2206877
·
IF 15.1
Lu Chen,Youbing Li,Biao Zhao,Shanshan Liu,Huibin Zhang,Ke Chen,Mian Li,Shiyu Du,Faxian Xiu,Renchao Che,Zhifang Chai,Qing Huang
Electromagnetic (EM) wave pollution is harmful to human health and environment, thus it is absolutely important to develop new electromagnetic wave absorbing materials. MAX phases have been attracted more attention as a potential candidate for electromagnetic wave absorbing materials due to their high conductivity and nanolaminated structure. Herein, two new magnetic MAX phases with multiprincipal elements ((Ti 1/3 Nb 1/3 Ta 1/3 ) 2 FeC and (Ti 0.2 V 0.2 Nb 0.2 Ta 0.2 Zr 0.2 ) 2 FeC) in which Fe atoms replace Al atoms in the A sites are successfully synthesized by an isomorphous replacement reaction of multiprincipal (Ti 1/3 Nb 1/3 Ta 1/3 ) 2 AlC and (Ti 0.2 V 0.2 Nb 0.2 Ta 0.2 Zr 0.2 ) 2 AlC MAX phases with Lewis acid salt (FeCl 2 ). (Ti 1/3 Nb 1/3 Ta 1/3 ) 2 FeC and (Ti 0.2 V 0.2 Nb 0.2 Ta 0.2 Zr 0.2 ) 2 FeC exhibit ferromagnetic behavior, and the Curie temperature ( T c ) are 302 and 235 K, respectively. The dual electromagnetic absorption mechanisms that include dielectric and magnetic loss, which is realized in these multiprincipal MAX phases. The minimum reflection loss (RL) of (Ti 1/3 Nb 1/3 Ta 1/3 ) 2 FeC is −44.4 dB at 6.56 GHz with 3 mm thickness, and the effective bandwidth is 2.48 GHz. Additionally, the electromagnetic wave absorption properties of the magnetic MAX phases indicate that magnetic loss also plays an important role besides dielectric loss. This work shows a promising composition-design strategy to develop MAX phases with good EM wave absorption performance via simultaneously regulating dielectric and magnetic loss together.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yingfa Liu,Zhongxiang Bai,Guo Lin,Lingling Wang,Xiaoqian Xu,Liang He,Xiaobo Liu
The excellent water transport and molecular sieving properties of graphene oxide (GO)-based membranes have shown application prospects in solving the freshwater crisis. However, it is challenging to further increase water permeability while ensuring separation efficiency, and the destruction of the membrane structure caused by the electrostatic repulsion between the graphene oxide nanosheets also hinders its practical application. In this study, a simple vacuum-assisted method is proposed to prepare a chemical cross-linking mediated composite graphene oxide nanofiltration membrane (GO-TA-APTES-x) by adding tannic acid (TA)-aminopropyltriethoxysilane (APTES) nanoparticles (TA-APTES NPs). Thanks to the expansion of GO membrane interlayer spacing by TA-APTES NPs, the permeability of the GO-TA-APTES-10 membrane is 15 times higher than that of the original GO membrane, and the rejection rate of Congo red remains at 99.9%. In addition, TA-APTES NPs improves the application stability of composite membrane in water environment by means of chemical crosslinking agent, which is expected to promote the transformation of GO nanofiltration membrane from the laboratory environment to industrial application.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Qianyu Wei,Qiuhu Lin,Zezhen Zhang,Lili Wu,Chaocan Zhang
Polyvinylidene fluoride (PVDF)/polyhexamethylene guanidine (PHMG)/tannic acid (TA) coatings have some degree of hydrophilicity but lack stability. To improve the hydrophilicity and stability of antimicrobial PVDF/PHMG/TA membranes, Fe(III) is introduced into the composite system. As a weakly acidic hydrophilic nanoion, Fe(III) can enhance the hydrophilicity and resistance to contamination of the membranes. Furthermore, the stability can be enhanced because a three-dimensional cross-linked coating structure is formed by the complexation of Fe(III), TA and PHMG. This work investigates the effects of different tannic acid concentrations and pH conditions on the hydrophilicity, anti-pollution and stability of the modified coatings. The surface morphology of the membranes was analyzed by field-emission scanning electron microscopy. Additionally, the hydrophilicity and the antipollution performance were evaluated based on the water contact angle, submerged oil contact angle, emulsion flux and flux recovery rate. The stability was evaluated by the changes in flux recovery rate and water contact angle before and after emulsion scouring and ultrasonic treatment. The results show that the modified membranes have favorable hydrophilicity and stability after the addition of Fe(III). The water contact angle can be reduced to 19°, the pure water flux can reach 13,850 L·m −2 ·h −1 , and the emulsion flux can reach 2650 L·m −2 ·h −1 . Moreover, 99.68% flux recovery was achieved after 7 days of deionized water flushing, and the water contact angle remained almost unchanged.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Fang He,Lan Luo,Zhenxing Wang,Shaoqin Peng,Yuexiang Li
Design of highly condensed g-C 3 N 4 is a prospective way to optimize the photoreactivity of g-C 3 N 4 as it possesses condensed structure with decreased interlayer spacing, which benefits both charge transfer and light harvesting. Herein, we report that novel condensed carbonized-tannic acid (C-TA)/g-C 3 N 4 composites have been acquired via a supramolecular self-assembly of TA and melamine into TA/melamine precursors followed by thermal condensation. The acquired condensed C-TA/g-C 3 N 4 composites present superior visible-light photocatalytic activity for H 2 evolution. The 1 wt% C-TA/g-C 3 N 4 composite shows 4.2 times enhancement of photocatalytic activity for H 2 evolution compared to pristine g-C 3 N 4 . The TA with distinct adhesion properties and functional groups of OH, which is firmly linked with melamine, can confine the melamine inside to promote the condensation to gain more condensed g-C 3 N 4 . The condensed C-TA/g-C 3 N 4 composites with decreased interlayer distance effectively promote charge transfer and photocatalytic H 2 evolution.
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DOI
高影响因子
ENERGY
·
2021
·
IF 7.147
Yifeng Zheng,Shun Wang,Zehua Pan,Bo Yin
Electrochemical CO 2 reduction to CO by using solid-oxide electrolysis cells (SOECs) is a promising option to produce useable fuels using renewable energy. However, traditional cobalt-based air electrodes exhibit high thermal-expansion coefficients and a tendency of Co segregation, compromising long-term stability. Here, Co-free Bi 0.5 Sr 0.5 FeO 3-δ perovskite was explored with Ta doping into the B-site as the air electrode (BSFTx). Doping Ta enabled a decrease in polarization resistance by 45% from 0.31 Ω cm 2 to 0.17 Ω cm 2 at 700 °C. The distribution function of relaxation times analysis suggested that the observed improvements can be ascribed to the enhanced mass-transfer processes, which include oxygen diffusion, association, and desorption. The performance of a cathode-supported Ni-YSZ (ytttria-stabilized zirconia)|YSZ|Gd-doped ceria|BSFTx cell was characterized by an electrolysis current of −0.81 A cm −2 under 1.5 V at 800 °C, which corresponds to a CO-production rate of 4.2 × 10 3 nmol s −1 cm −2 and an electrical efficiency of 98%. Excellent stability of the cell was also demonstrated by steady current density during the 32-h test executed under 1.2 V at 800 °C. The nearly 100% electrical efficiency and the satisfactory performance and stability of SOEC with Ta-doped BSF air electrode indicated its potential use in CO 2 reduction technique.
研究领域:
材料科学
·
能源化学
·
电化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）