JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Zhefei Zhao,Li Yu,Lingxia Zheng,Tianyang Guo,Zhuoqing Lv,Shuang Song,Huajun Zheng
The development of catalysts with high atom utilization and activity is the biggest challenge for electrocatalytic hydrodechlorination (EHDC) technology . Herein, a design strategy of TiO 2 @PDA inorganic-organic core-shell skeleton for loading lower dosage of noble palladium (Pd) with robust activity is reported. The self-supported TiO 2 @PDA nanorod arrays provides exposed surface area for anchoring Pd and PDA as interlayer controls the Pd nucleation to form nanodots with high dispersion, realizing high atom utilization. Moreover, the strong interaction between PDA and Pd realizes the coexistence of electron-rich and deficient Pd species with suitable proportion, which facilitate the H* formation and the C-Cl bond activation, respectively, resulting in the promoted activity. The optimal TiO 2 @PDA/Pd electrode exhibits a low dosage of Pd (0.093 mg cm −2 ) and excellent activity for 4-chlorophenol reduction with a mass activity (MA) of 23.96 min −1 g −1 , which is 3.31 times as high as that of TiO 2 /Pd. The design scheme with inorganic-organic core-shell skeleton as support is benefit for developing highly efficient and lower price elctrocatalysts for EHDC.
研究领域:
材料科学
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环境科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Yilin Wu,Wendong Xing,Minjia Meng,Jian Lu,Faguang Ma,Jia Gao,Xinyu Lin,Chao Yu
Development of membrane-associated molecularly imprinted materials with fast and high permselectivity has been significant needed in separation engineering field. Herein, for the first time, a subversive synthesis strategy with hierarchical structure was proposed for the preparation of nanocomposite blended molecularly imprinted membranes (NBMIMs). Artemisinin, the high-efficiency antimalarial drug, was chosen as the template molecule. Instead of the direct modification of nanocomposite on membrane surfaces , the double-bonded TiO 2 @PDA was initially prepared, the blended membrane synthesis procedure was then conducted through a phase conversion process by using the as-prepared TiO 2 @PDA and PVDF powder as host materials. Importantly, the double-bonded TiO 2 @PDA-based nanocomposite in blended membranes was first proposed and applied as imprinting-initiated factor during the next artemisinin-imprinted process, leading the formation of imitated core-shell structure on membrane surfaces. It was no surprise that more excellent rebinding capacity (66.9 mg g −1 ), fast adsorption kinetics and high permselectivity coefficients (more than 17) were successfully achieved. Furthermore, an important conclusion was also obtained that TiO 2 @PDA-based nanocomposite from NBMIMs would cause significant enhancement of the rebinding capacity, that is to say, more and more artemisinin-imprinted sites would be synthesized by increasing the dosage of TiO 2 @PDA until 0.5 g. Therefore, a novel direction for the design and manipulation of MIMs materials had been successfully designed and guided for selective separation of artemisinin.
研究领域:
分离工程
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材料科学
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药物化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wei Ji,Yewen Xiao,Feng Xiao,Linlin Li,Minmin Chen,Hualin Wang
Membrane separation technology is a promising alternative for oily wastewater purification. However, developing membrane for the purification of biochemical oily wastewater is still challengeable. To this aim, a novel multifunctional photocatalytic membrane of PTPB-8 is fabricated by sequentially loading of TiO 2 , polydopamine (PDA), and BiOBr onto polyacrylonitrile (PAN) nanofibers in situ . PTPB-8 is of water contact angle (WCA) ∼ 0° and underwater oil contact angle (UOCA) 154.7 ± 2.5°, allowing it with outstanding separation and anti-fouling capability, and good reusability for emulsion separation under gravity (i.e., separation efficiency >90 %, permeation flux >300 L m -2 h −1 , and flux recovery rate >82 % for n-hexane-in-water emulsion after 15 cycles). Under simulated solar light, the ternary heterojunction TiO 2 @PDA@BiOBr is catalytically active with generating active species and the charge transfer pathway follows the mechanism of Z-type heterojunction. Consequently, PTPB-8 can kill E. coli and S. aureus by ∼ 100 % and degrade tetracycline by >90 %. The application trial results have demonstrated the great potential of PTPB-8 in the purification of biochemical oily wastewater containing bacteria and antibiotics. This study will also give a new idea for enhancing the photocatalytic activity of heterojunctions by PDA decoration.
研究领域:
环境工程
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水处理
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光催化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 23
·7903
·
IF 4.6
Chang-Hua Zhao,Yu-Ping Zhang,Li Wan,Xin-Xin Chen,Pei Yuan,Ling-Bo Qu
Although membrane separation technology has been widely used in the treatment of oily wastewater, the complexity and high cost of the membrane preparation, as well as its poor stability, limit its further development. In this study, via the vacuum-assisted suction filtration method, polydopamine (PDA)-coated TiO2nanoparticles were tightly attached and embedded on both sides of laboratory filter paper (FP). The resultant FP possessed the typical wettability of high hydrophilicity in the air with the water contact angle (WCA) of 28°, superoleophilicity with the oil contact angle (OCA) close to 0°, underwater superoleophobicity with the underwater OCA greater than 150°, and superhydrophobicity under the water with the underoil WCA over 150° for five kinds of organic solvents (carbon tetrachloride, toluene, n-hexane, n-octane, and iso-octane). The separation efficiency of immiscible oil/water, oil-in-water, and water-in-oil emulsions using the modified FP is higher than 99%. After 17 cycles of emulsion separation, a high separation efficiency of 99% was still maintained for the FP, along with good chemical and mechanical stability. In addition, successful separation and purification were also realized for the oil-in-water emulsion that contained the methylene blue (MB) dye, along with the complete degradation of MB in an aqueous solution under UV irradiation.Keywords:TiO2@PDA;filter paper;oil/water separation;emulsion separation;purification
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产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 13
·e06882
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IF 2.3
Yu-Ping Zhang,Chang-Hua Zhao,Hong-Li Dou,Pei Yuan
Ultrasonic- and microwave-assisted methods are progressive techniques used in synthesizing nanocomposites on different inorganic, organic, or hybrid supports. In this study, one-step synthesis of Fe 3 O 4 @TiO 2 (FT) core-shell nanoparticles was conducted by combining ultrasound- and microwave-assisted solvothermal methods. The composites were fabricated using a central magnetic Fe 3 O 4 core, with in situ formation of the outer TiO 2 coating. The surface of FT was further modified via polydopamine(PDA), and the as-prepared Fe 3 O 4 @TiO 2 @PDA composites (FTP) were successfully used as photocatalysts to effectively remove methylene blue (MB) in an aqueous solution. The pH, photocatalyst dosage, initial MB concentration, and temperature influences were investigated under 254 nm UV light. Additionally, the changes in the physicochemical properties of the nanocomposites were analyzed using transmission and scanning electron microscopy, Fourier transform infrared spectroscopy, x-ray powder diffraction, and vibrating sample magnetometry. The as-prepared FTP composites exhibited excellent efficiencies (99.9%) in the adsorption and photocatalytic degradation of 20 ppm MB in neutral or basic conditions over 30 min. Compared with previous reports about Fe 3 O 4 @TiO 2 composites, the modified PDA layer enriched MB molecules via hydrogen bonds and strong electrostatic interactions, and simultaneously trapped photogenerated electrons of TiO 2 to inhibit carrier recombination with an apparent reaction rate constant of 0.0816 min − 1 . Therefore, the use of ultrasonic and microwave co-irradiation in rapidly preparing magnetic composites is simple and viable.
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2017
·
IF 6.035
Huiqing Wu,Yuejun Liu,Long Mao,Chunhai Jiang,Jiaming Ang,Xuehong Lu
To prepare an ultrafiltration membrane with simultaneous self-cleaning and self-protection abilities, TiO 2 -polydopamine (PDA) nanohybrid are facilely prepared and used to functionalize polysulfone (PSf) membrane matrix. In the TiO 2 -PDA nanohybrid , PDA spheres acts as an adhesive substrate to hold densely covered photocatalytic TiO 2 nanoparticles , and also serves as a free-radical scavenger to protect PSf membrane against the damage by free radicals produced by TiO 2 during UV exposure treatment. The spherical-shaped TiO 2 -PDA can be easily doped into PSf membrane via phase inversion method, which allows the hydrophilic TiO 2 -PDA spheres migrating to the hydrophobic PSf surface and benefiting the antifouling ability. As a result, the TiO 2 -PDA/PSf hybrid membrane exhibits excellent overall performances in separation efficiency, remarkable self-cleaning property and performance stability under UV irradiation, in comparison with PSf and TiO 2 /PSf membrane. The influence of TiO 2 -PDA content on the membrane properties is also investigated, and it is found the hybrid membrane with 0.8 wt% TiO 2 -PDA possesses the optimal performance.
研究领域:
材料科学
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环境工程
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膜技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qicheng Bi,Quanling Zhao,Zhiyong Qin,Wei Gao,Zequan Li,Shuduan Deng,Liuting Mo
Leaks during oil extraction, wastewater containing organic solvents from industrial production and oily wastewater from daily life pose a great threat to the ecosystem and human life, which makes the research and development of oil–water separation materials imminent. Nanocellulose aerogels possess lightweight properties, high porosities, and excellent adsorption capabilities, making them efficient adsorbents for the removal of oil spills and organic pollutants. A novel method is presented utilizing the self-polymerization characteristics of polydopamine (PDA) to encapsulate titanium dioxide (TiO 2 ) nanoparticles, thereby forming core–shell nanoparticles. The unique adhesive properties of PDA play a critical role in the binding of these nanoparticles to a cellulose nanofiber (CNF) scaffold, resulting in a robust composite material. To further enhance the performance of the aerogel, octadecyltrimethoxysilane (OTMS) was incorporated, imparting hydrophobicity to the overall structure, resulting in the OTMS/TiO 2 @PDA/CNF aerogel. This aerogel exhibited outstanding adsorption capabilities and absorbed various light and heavy oils, as well as organic solvents, with an adsorption capacity of up to 59.9 g/g. Under gravity, the separation efficiency of the aerogel reached 96.15 %. An innovative oil collection device was designed for the sustainable separation of pollutants from water to ensure efficient cleanup operations. Furthermore, the aerogel exhibited excellent antibacterial properties with a bactericidal rate of up to 99.14 % and significantly enhanced environmental adaptability. This simple, economical, and environment-friendly method is expected to promote the development of efficient oil/water separation adsorbents and contribute to the control of environmental pollution.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Zhiwei He,Hanqing Wu,Zhen Shi,Xianming Gao,Yuping Sun,Xianguo Liu
Oceanic oil spill and the discharge of industrial oily wastewaters can cause significant threats to the ecological environment and human health. Herein, we design a durable TiO2/PDA-based superhydrophobic paper for efficient oil/water separation. Bioinspired from mussel adhesive proteins, the mechanical durability of the as-prepared superhydrophobic paper is enhanced by the deposition of polydopamine (PDA) onto cellulosic fibers via self-polymerization of dopamine. The TiO2/PDA-based superhydrophobic paper shows a high water contact angle of 168.2° and an oil contact angle of ∼0°, exhibiting excellent superhydrophobicity and superoleophilicity. Furthermore, the as-prepared superhydrophobic paper possesses excellent chemical stability, thermal stability, and mechanical durability in terms of being immersed in corrosive solutions and solvents and boiling water and being subjected to the sandpaper abrasion test, respectively. More importantly, the separation efficiency of the TiO2/PDA-based superhydrophobic paper for an oil/water mixture is 97.2%, and it maintains a separation efficiency above 94.3% even after 15 cyclic separation processes. Furthermore, the separation efficiency for water-in-oil emulsions is higher than 93.7% after 15 cyclic separation tests, showing its excellent recyclable stability for water-in-oil emulsions. Therefore, the rationally designed TiO2/PDA-based superhydrophobic paper shows great potential in the practical applications of self-cleaning, antifouling, and oil/water separation.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yilin Wu,Wendong Xing,Faguang Ma,Jia Gao,Xinyu Lin,Jian Lu,Chao Yu,Ming Yan
Three-dimensional (3D) basswood materials were successfully applied to construct molecularly imprinted nanocomposite membranes for the first time. Importantly in this work, the TiO 2 @PDA-based modification layers were initially achieved on basswood surfaces. And 3D mesoporous wood-based molecularly imprinted membranes (3DW-MIMs) with sandwich-like TC-imprinted layers were finally synthesize through a re-modified surface-initiated sol-gel technique. Interestingly, based on the TiO 2 -PDA@basswood surfaces, great increasement of TC-imprinted sites could be prepared during the sol-gel imprinting process. So it was no surprise that excellent rebinding capacity (150.5 mg g −1 ), fast adsorption kinetics and high permselectivity coefficients (more than 9.0) of 3DW-MIMs could be successfully achieved. Furthermore, an important phenomenon had also been found, i.e. the PDA-modified layers caused significant promotions to the rebinding capacities of the as-prepared 3DW-MIMs, that is to say, more and more TC-imprinted sites could be synthesized because of the PDA-modified surfaces. In addition, the as-prepared 3DW-MIMs were synthesized without complicated procedures and polluting the environment. Finally, the experimental results mentioned above, together with the green synthesis processes, strongly demonstrated that our synthesis methodology of 3DW-MIMs had great potential for applications in various fields of selective separation, chemical industry, environment, biological medicine and so on.
研究领域:
材料科学
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环境科学
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化学工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Huasong Xu,Congzhen Xie,Bin Gou,Rui Wang,Jiangang Zhou,Licheng Li
Field-grading polymer nanocomposites have drawn significant attention in high voltage electrical industries due to their excellent nonlinear conductive or dielectric properties . But composites with both nonlinear properties are rarely reported, and desirable nonlinear performance associated with excess fillers in the composite is at the expense of electric breakdown strength . In this work, BaTiO 3 nanoparticles were decorated successively using double-shell layers of TiO 2 and polydopamine, which are developed as novel nanofillers (BT@TiO 2 @PDA) for field-grading applications. Subsequently, BNNSs were prepared by liquid phase exfoliation, serving as the inhibitor of breakdown phase growth in the composites. Finally, novel epoxy nanocomposites (EP/BT@TiO 2 @PDA-OB) with BT@TiO 2 @PDA and oriented BNNSs were fabricated by a simple hot-pressing method. Results show that the hierarchically designed nanoparticles can make the composites possess not only nonlinear dielectric properties due to high ε r of BT and improved interfacial polarization , but also nonlinear conductive properties resulted from the organic semiconductor PDA shell. Nonlinear effective medium theory (EMT) was utilized to explain the nonlinear dielectric properties, and the hopping transport model considering Pool-Frenkel effect was applied to explain the nonlinear conductive properties. In addition, electric breakdown tests reveal that EP/BT@TiO 2 @PDA-OB has significantly enhanced breakdown strength (45.7 kV/mm) as compared to that of pristine epoxy resin (29.4 kV/mm) and EP/BT@TiO 2 @PDA-RB (randomly dispersed BNNSs, 36.2 kV/mm). It is expected that these results can open new avenues for the design of novel composites with both nonlinear conductive properties and dielectric properties as well as high breakdown strength.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Wei Zhang,Boyang Hu,Zhi Wang,Baoan Li
In recent years, omniphobic membranes have drawn much attention due to the strong repellence to various liquids. In this study, a PVDF composite membrane with omniphobic characteristics was prepared by constructing dual-scale hierarchical structure and introducing long chemical chains with the low surface energy. The special architecture was derived from the immobilization of TiO 2 @PDA@Cu composite nanoparticles on the surface via chemical bonding, and the fluorosilanization treatment with 1H,1H,2H,2H-perfluorodecyltriethoxysilane for membrane surfaces. A series of characterizations were implemented to explore composite nanoparticles’ morphology and composition, as well as membrane morphology and surface analysis. In addition, anti-fouling and anti-wetting behaviors of pristine and composite membranes were investigated by successive direct contact membrane distillation (DCMD) experiments, in which different contaminations containing inorganic salts, organic matter, surfactants and mineral oil were chosen as the feed. The results displayed that composite nanoparticles were obtained through the chelating effect of polydopamine (PDA) and the dual-scale structure was realized with the assistance of trimesoyl chloride (TMC). The omniphobic membrane exhibited strong repulsive forces to various liquids, such as water, SDBS solution (0.4 mM), CTAB solution (0.4 mM), tween-20 solution (0.4 mM) and mineral oil emulsion (0.2% v/v) with the contact angles of 168.0 ± 2.0°, 157.1 ± 1.5°, 160.0 ± 1.2°, 158.3 ± 1.5° and 152.5 ± 3.0°, respectively. Furthermore, compared to pristine membrane, the omniphobic membrane presented superior stability, higher salt rejection rate and excellent anti-wetting and anti-fouling performances in the DCMD tests. Thus, the composite membrane with superhydrophobic and superoleophobic features possessed great application potential for high salinity wastewater treatment in membrane distillation.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Lei Gao,Donghui Kou,Wei Ma,Shufen Zhang
Due to the large specific surface area and continuous pores in structures, metal–organic frameworks (MOFs) show great advantages in the adsorption of volatile organic compounds (VOCs). Photonic crystal (PC) sensors derived from MOFs are promising for the visual detection of VOC gases. However, they still have problems of low sensitivity and poor color saturation and tunability. Here, inspired by vapor-sensitive scales of Tmesisternus isabellae beetle and scattering light absorption of polydopamine, a porous one-dimensional PC sensor is constructed by combining ZIF-8 with TiO2@PDA nanoparticles. The PC sensor shows significant color changes under different concentrations of benzene vapor and reaches a detection limit of 0.8 g/m3. It has a response time of less than 1 s and maintains stable optical performance after 100 times of reuse. Moreover, ZIF-67 and ZIF-7 are both incorporated into the PCs for comparison; it reveals that ZIF-8 shows superior benzene detecting property. Additionally, the synergistic adsorption of VOCs in inner and outer holes of the ZIF-8 layer is demonstrated by real-time mass monitoring with quartz crystal microbalance with dissipation. This study provides a valuable reference for the fabrication of high-quality MOF-based PC sensors and sensing mechanism study between microscopic molecular adsorption and macroscopic performance.
研究领域:
材料科学
·
化学传感器
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纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）