CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Guanhua Liu,Leijie Guo,Lingfeng Zhao,Liya Zhou,Suoqing Zhang,Yunting Liu,Xiaobing Zheng,Yanjun Jiang,Jing Gao,Lihui Wang
Biocatalytic membranes are a green and effective option for the removal of micropollutants (MPs) from water. The effective immobilization of enzyme together with facial fabrication of membrane is constantly required. Herein, a biocatalytic membrane was prepared by one-step pressure-assisted self-assembly of graphene oxide (GO), polyethyleneimine (PEI) and laccase (Lac) on the surface of hydrolyzed polyacrylonitrile (HPAN) membrane. The physical and chemical property of membranes, and the immobilization of laccase were characterized. Under optimal conditions, the biocatalytic membrane has a bisphenol A (BPA) removal rate of 95.3%, and the rejection for dyes can be higher than 97% with salts rejection of less than 23% and pure water permeance of 207.4 LMH/bar. Meanwhile, GO-PEI-Lac membrane retained stable removal rate under a wide pH range and feed BPA concentrations. The membrane can also remove various phenolic MPs. In addition, the GO-PEI-Lac membrane retained more than 80% removal rate after 6 cycles. Overall, this study opens up a convenient avenue for the facial fabrication of high-efficient biocatalytic membranes for MPs removal.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 7
·2980
·
IF 4.6
Kangkang Wang,You Li,Honggang Wang,Ziyue Qian,Xiaokai Zhu,Sabir Hussain,Liming Xie
Surface-enhanced Raman scattering (SERS) technique is widely used for the highly sensitive detection of trace residues due to its unparalleled signal amplification ability and plays an important role in food safety, environmental monitoring, etc. Herein, CdSSe nano-flowers (CdSSe NFs) are synthesized via the chemical vapor deposition (CVD) method. CdSSe NFs thin film is used as a SERS substrate with an ultralow limit of detection (LOD, 10−14M), high apparent enhancement factor (EF, 3.62 × 109), and excellent SERS stability (relative standard deviation, RSD = 3.05%) for probe molecules of Rh6G. Further, CdSSe NFs substrate is successfully applied in the sensitive, quantitative, and label-free analysis of ciprofloxacin (CIP) and enrofloxacin (ENR) antibiotics, which exhibit LODs of below 0.5 ppb. This excellent SERS platform may be widely utilized for sensitive life science and environmental sensing.Keywords:nano-flower;surface-enhanced Raman scattering;enrichment;antibiotics
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PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 19
·2206917
·
IF 13.3
Zhong-Yi Wang,Ying-Jie Zhu,Yu-Qiao Chen,Han-Ping Yu,Zhi-Chao Xiong
Solar energy-driven water evaporation is a promising sustainable strategy to purify seawater and contaminated water. However, developing solar evaporators with high water evaporation rates and excellent salt resistance still faces a great challenge. Herein, inspired by the long-range ordered structure and water transportation capability of lotus stem, a biomimetic aerogel with vertically ordered channels and low water evaporation enthalpy for high-efficiency solar energy-driven salt-resistant seawater desalination and wastewater purification is developed. The biomimetic aerogel consists of ultralong hydroxyapatite nanowires as heat-insulating skeletons, polydopamine-modified MXene as a photothermal material with broadband sunlight absorption and high photothermal conversion efficiency, polyacrylamide, and polyvinyl alcohol as reagents to lower the water evaporation enthalpy and as glues to enhance the mechanical performance. The honeycomb porous structure, unidirectionally aligned microchannels, and nanowire/nanosheet/polymer pore wall endow the biomimetic aerogel with excellent mechanical properties, rapid water transportation, and excellent solar water evaporation performance. The biomimetic aerogel exhibits a high water evaporation rate (2.62 kg m −2 h −1 ) and energy efficiency (93.6%) under one sun irradiation. The superior salt-rejecting ability of the designed water evaporator enables stable and continuous seawater desalination, which is promising for application in water purification to mitigate the global water crisis.
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PubMed
高影响因子
Materials Chemistry Frontiers
·
2023
·Vol. 7
·期 8
·1624-1632
·
IF 7
Kangkang Wang,Zhexue Chen,Yueqi Li,Yong Zhang
Semiconductor quantum dots (QDs) are of great interest for a wide range of applications. Herein, we report the top-down production of CdSe QDs with a super small size (about 3 nm) and high yield (14%). The as-produced QDs exhibit different optical properties from those of colloidal QDs. This is probably due to the generation of numerous bare edges during the process of silica-assisted ball-milling. The CdSe QD-based substrate could serve as a surface-enhanced Raman scattering (SERS) substrate for the ultrasensitive recognition of probe molecules at trace levels, which are mainly attributed to the special edge–edge interactions and charge transfer (CT) enhancement mechanism. The substrate exhibits good reproducibility, uniformity, and high enhancement factor (5.05 × 106) with an expansion of the ultra-low limit of detection (LOD) to 10−10 M. It has also been successfully used in the reliable, quantitative, and label-free detection of uric acid (UA) at a low concentration (1 μM), which facilitates the early prevention of gout disease. This QD-based platform not only confirms the feasibility of SERS analysis but also provides ideas for the early detection of residues.
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Qingguo Chen,Tongchang Wang,Lei Tang,Zhixiang Zeng,Baikang Zhu
The oil dewetting self-cleaning performance is the most effective method to solve viscous oil pollution. The surface composition has a positive correlation with the property, and oil droplets tend to desorb on highly hydrophilic surfaces. But the influence of surface microstructure is more complex. Herein, we prepared a variety of surface structures with different morphologies and parameters, and performed the same surface modification to ensure compositional homogeneity. By testing the oil dewetting performance, we found that the surface microstructure has two modes of action: promotion and inhibition, and the final effect depends on the relative strength. The former comes from the amplifying effect of the structure on the wettability , and the latter refers to the hindering effect of the structure on the movement of oil droplets. The UOWCA reached 0° for the nanowire and honeycomb structures , and the oil droplets could quickly detach from the surface of the honeycomb structure in about 5 s. When the deposition of nanoparticles on the surface reaches 4 layers, the oil droplets can desorption from the surface within 2 min. The nanoparticle-deposition and the honeycomb structure also exhibit excellent crude oil pollution cleaning and crude oil-water separation ability. This study can not only provide two kinds of structures for crude oil treatment in practice, but also help us deeply understand the structure-activity relationship between surface morphology and oil dewetting performance in theory.
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高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 10
·期 5
·2202065
·
IF 6.389
Wen-Ying Yang,Di Zhou,Jia-Lu Shen,Zhi-Kang Xu,Ling-Shu Wan
Co-deposition of phenols and amines inspired by mussel-inspired chemistry has attracted much attention in the field of surface and interface science and technology. However, most deposition systems are still limited to phenols with at least one catechol group. In this work, a novel enzyme-triggered co-deposition system based on a natural phenol (gentisic acid, GA) and a kind of biomacromolecule (chitosan, CS) is reported. With the catalysis of laccase, GA can be oxidized and further react with CS to form effective surface coatings on various substrates such as polypropylene microfiltration membrane (PPMM). The co-deposition process takes only 40 min at room temperature and endows the membrane with superhydrophilicity and underwater superoleophobicity. The modified membranes show excellent separation performance, reusability, and long-term stability for the separation of oil-in-water emulsions. The modified membranes are highly charged (pI ≈7.2) and capable of efficient dye adsorption. In addition, the modified membranes possess better protein resistance properties compared with the nascent membranes. This work demonstrates a green, mild, and highly efficient surface modification process based on laccase catalysis. The co-deposition system comes from natural sources and expands the phenol family for constructing multi-functional surface coatings.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Linzhi Zuo,Yang Li,Long Cheng,Tao Yu,Yiting Che,Shitan Yan,Kiushkin Vladimir Yurievich,Ting Bian,Daifen Chen
Interfacial solar steam generation (ISSG) technology is considered to be one of the most promising approaches to alleviating the global shortage of clean water due to its high solar thermal conversion efficiency. However, achieving stable evaporation in high salinity solutions and preventing the occurrence of salt deposition phenomena remains a challenge. Here, an efficient and stable photothermal membrane-based evaporator has been developed, which consists of polydopamine (PDA) modified leaf-like zeolitic imidazolate framework (ZIF-L) implanted in sodium alginate (SA) membrane supported on a melamine sponge (S-ZIF-L/PDA sponge), providing more advantages for boosting the photothermal conversion performance and preventing salt deposition. This S-ZIF-L/PDA sponge displays an excellent light absorption (>95 %), and remarkable evaporation rate of 1.66 kg·m −2 ·h −1 with a solar-thermal efficiency of 91.06 % under 1.0 sun (1 kW·m −2 ) illumination. Benefiting from the super hydrophilic feature of the melamine sponge and the rejection properties of the SA membrane structure, the obtained sponge effectively prevents salt and contaminants from depositing on the surface. Particularly, the S-ZIF-L/PDA sponge achieves an evaporation efficiency of 86.17 % in 20 wt% NaCl solution, along with excellent resistance to salt deposition and marvelous stability in cycling tests. The salt ion concentration of the obtained fresh water is much lower than the World Health Organization (WHO) drinking water standard, and the organic removal rate exceeds 99 %. This work provides a competitive solution for high-salinity desalination and wastewater treatment.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yanhua Wang,Jingmin Yan,Zhengchen Li,Xiang Liu,Xiaomeng Zhang,Lianqi Wei,Shufeng Ye
Owing to the changeable components of oil–water system and the inflexible limitation of available materials during oil–water separation, the treatment of oily wastewater with wide pH, large discharge and high COD value remains a great challenge. In this study, a simple strategy was used to construct Gemini composite based on TiO 2 pillared montmorillonite . The resultant montmorillonite-based Gemini composite (QATMt-x) exhibited high surface area (116.54 m 2 g −1 ), surface potential (18.8 mV at pH2), good acid and alkali resistance, amphiphilic-multifunctional surface, and defective layered structure and, as a result, delivered high capability (E D ≥ 96 %) and long cyclic life for oil–water separation. More significantly, detailed mechanism studies reveal that the crucial reasons of oil–water separation on microemulsion and aqueous containing organic contaminant are demulsification through electron capture of the grafted chitosan, and adsorption by lipophilic saturated alkanes, titanium hydrates, (metal) hydroxyl and amine group, respectively. Hence, QATMt-x is particularly suitable for efficient demulsification in acidic media (pH 2) and for the adsorption of ecotoxic organic substances (e.g., perfluorooctanoic acid, methyl blue). In short, construction of Gemini surfactants based on low-cost inorganic carriers would offer new strategies in exploring amphipathic dual-functional layered structures for simultaneously efficient separation of multisystem oil–water scenarios.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yi-Fang Mi,Yi-Han Huang,Shu-Heng He,Zhi-Hai Cao,Bao-Qing Shentu
Polydopamine (PDA) coating offers an environmentally friendly and facile method to modulate membrane surface properties. However, the oxidation of dopamine process by air normally needs a long time and forms uneven PDA coatings, which limit the applications of PDA. Herein, we proposed a strategy to promote the fast deposition of PDA triggered by carbon quantum dots (CQDs) under visible light irradiation. The reactive oxygen species generated by CQDs enhance the covalent polymerization and deposition rate of dopamine, thus, forming a uniform and smooth nanofiltration membrane surface. Under the optimized conditions, the PDA coating triggered by CQDs endows the membrane with superior dye rejection of methyl blue (99.7%) and water flux of 24.4 L m -2 h -1 at 0.6 MPa. Moreover, the membrane exhibits great potential in selective separation between dye and salt, the separation factor of methyl blue /NaCl can be 199.8. This work provides an efficient strategy to construct smooth PDA coatings with a fast deposition rate, which is beneficial to tailor loose nanofiltration membrane surfaces for wide applications.
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高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2023
·
IF 5.2
Shuai Yuan,Mingyong Zhou,Xijiang Liu,Bingyan Jiang
The coupling of pressure-driven flow (PDF) and electroosmotic flow (EOF) has been widely applied in the field of microfluidics. However, the adverse effects of pressure induced by PDF on EOF in a confined space cannot be ignored. Herein, the interactions of these two streams when the Reynolds number ( Re ) varies from 0.1 to 10 are systematically explored through numerical simulations to gain an in-depth understanding of the mechanism of the pressure effect on mass species transport and to generate optimal separation of samples. The simulation results show that the length of the sample increases linearly and the molecular diffusion is accelerated due to the pressure effect caused by the EOF channel structure and PDF extrusion, which reduces the separation quality and even leads to the failure of electrophoresis . However, the deformation of the sample cannot be effectively resisted by increasing the applied voltage . A better separation effect can be obtained only when Re =0.1. To surmount the above disadvantages, a novel porous polymer plug with pores smaller than 5 μm that provides a region that has high flow resistance but allows the electromigration of charged analytes is established in the EOF channel. The experimental results show that this plug can effectively neutralize the EOF outlet pressure when Re ≤5. The shape of the sample is not distorted and the maximum gray values decreased by 26%, 30% and 49% respectively in 7 s when Re =0.1, 1 and 5, which are much better than the results without the plug.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Guoxu He,Menghui Wan,Zhihua Wang,Yanbao Zhao,Lei Sun
Due to its minute droplet size and stability, separation of the emulsion is a non-negligible challenge. In this paper, polyvinylidene fluoride (PVDF) nanofibrous membranes were prepared via the electrospinning method. The nanofibrous membranes were subsequently surface-modified by ZnO nanoparticles , tannic acid (TA), and n-dodecyl mercaptan (DT), in order to reduce the nanofiber membranes' surface energy while increasing their surface roughness . Thus, superhydrophobic and antibacterial nanofibrous membranes have been fabricated for oil-water emulsion separation. The as-fabricated nanofibrous membranes have a water contact angle of 156.5°. The product has a porosity of up to 73.3% due to the high porosity of the electrospinning nanofibrous membranes. In addition, the tensile strength of the PVDF@ZnO@TA@DT nanofibrous membrane is up to 69.25 MPa. Due to these properties, oil droplets can pass through the membrane during the oil-water separation, while the water phase is blocked by the membrane. This results in a good selective permeability of the membrane. As a result, the separation efficiency of the PVDF@ZnO@TA@DT nanofibrous membranes reaches more than 99%, and the flow flux is 1008.88 L·m −2 ·h −1 . At the same time, antimicrobial testing demonstrates that the nanofibrous membranes have a bacteriostatic rate of over 98%. Combined with these properties, PVDF@ZnO@TA@DT electrospun nanofibrous membranes have great potential for efficient emulsion separation and deep purification of wastewater.
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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 6
·2804-2813
·
IF 11.9
Peng Zhang,Yizhi Chen,Hanqin Weng,Yusa Muroya,Shinichi Yamashita,Yinhua Zhao,Mingzhang Lin
Reduced graphene oxide (rGO) composite aerogels were synthesized by the radiation reduction of graphene oxide (GO) with the assistance of Eu3+, which demonstrated excellent adsorption performance for diverse organic pollutants. Eu3+ promoted the formation of the gel by inducing the pre-assembly of GO so that the required pH range for synthesizing the rGO aerogel by radiation reduction was broadened and the minimum absorbed dose was also reduced. At pH 2, the Eu3+-induced pre-assembly fabricated more mesopores and enlarged the specific surface area of the obtained hierarchically porous rGO-Eu composite aerogel, which enabled the high-capacity (81–395 g g−1) and ultrafast removal of organic solvents. The different effects of organic solvents on the unique fluorescence emission of Eu(III) also allowed the in situ detection of certain organic solvents such as pyridine. At pH 6, Eu3+ enhanced the reduction of GO by capturing more hydrated electrons, the most reductive species produced by water radiolysis, and synergistically reduced GO. The obtained rGO-Eu composite aerogel with a high reduction degree, demonstrated outstanding adsorption capacities for various anionic organic dyes (40.5–1572.5 mg g−1) owing to the strong π–π interaction and electrostatic attraction. Benefitting from high reduction, it demonstrated adsorption capacity for cationic dyes (97.3–1367.6 mg g−1) comparable to other reported graphene-based aerogels. The rGO-Eu aerogel prepared by radiation reduction might be suitable as a broad-spectrum adsorbent for organic pollutants.
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高影响因子
危险品化学品经营许可证（带存储）