Catalysts
·
2025
·Vol. 15
·期 2
·175
·
IF 4
Wei Wang,Jiaqi Liu,Guang Shi,Shiqi Wu,Shihan Zhang,Ruixia Yuan
A magnetic shell-structured nano-catalyst was prepared by self-polymerization of dopamine wrapped by ferric oxide as the carrier, which was loaded with palladium nanoparticles (Pd/PDA@Fe3O4). The presence of magnetic Fe3O4made it easy for nanoscale palladium particles to recover and prevent the loss of palladium nanoparticles that is unavoidable in traditional usage and preparation procedures. The catalyst was characterized by X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscopy, thermal weight loss analysis, Raman spectroscopy, X-ray photo-electron spectroscopy, and magnetic properties analysis. The catalytic performance of the prepared catalyst was investigated taking 4-nitrophenol (10 mg/L) and rhodamine B (15 mg/L) as the target pollutants. The results showed that under the conditions of 35 °C, pH = 7 and a catalyst dosage of 3 mg, the catalytic reduction efficiency of 4-nitrophenol, rhodamine B, and the mixture of them all can reach 99%. The catalytic efficiency of Pd/PDA@Fe3O4remained above 90% after being used 10 times. The shell structure of Fe3O4made it possible and easy to recover and recycle the nanoscale palladium, which was a real problem in the usage of nano-catalysts. At the same time, the problem of separation and recovery of palladium nano-catalyst is solved by magnetism, which provides research ideas for the recycling and utilization of nano-materials.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Zhaoxiang Zeng,Lihua Huang,Caiyan Xu,Siqi Rao,Yin Chen,Wenjin Xu,Hao Hong
Metal-organic frameworks (MOFs) are a unique type of coordination polymer characterized by their high porosity and enormous specific surface area, which enable their use as carriers. We have constructed a novel MOFs-based nanodelivery system designed for multimodal combination therapy to enhance the delivery efficiency and efficacy of chemotherapeutic drugs. The synthesis of MOF-199, which inherently possesses a drug-release response function, was used as a nanodrug carrier. Doxorubicin (DOX) was encapsulated through physical adsorption, and the carrier surface was modified with a biomimetic material, polydopamine (PDA). Both PDA and hyaluronic acid (HA) molecules contain carboxyl groups, which can be connected through Fe3+-mediated coordination interactions. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) were used to test the size, dispersity, and structural characteristics of the synthesized products, confirming their appropriate size and dispersity. BET(BET surface area) and TGA test results indicated that the nanocarrier exhibits good stability, a large specific surface area, and high porosity, making it suitable for use as a drug carrier. Ultraviolet spectrophotometry confirmed that the nanocarrier MOF-199-PDA-HA has the ability to consume GSH, with the drug loading rate and encapsulation efficiency of DOX in the system were measured as 39.58% and 73.26%, respectively. In cellular experiments, the DOX@MOF-199-PDA-HA group produced toxic hydroxyl radicals following H2O2 addition. After near-infrared light irradiation, both cellular toxicity and reactive oxygen species fluorescence intensity increased, indicating further enhanced anticancer efficacy. Using free HA as a control, it was confirmed that HA enhances tumor-specific accumulation of DOX@MOF-199-PDA-HA by binding to CD44 receptors on cancer cell surfaces.DOX@MOF-199-PDA-HA is a pH/GSH/NIR-responsive nanodelivery system with targeting functionality. This system ensures that drugs are released with higher efficiency in the tumor microenvironment through pH and glutathione (GSH) responsive drug-release mechanisms, thereby reducing toxicity to healthy tissues
研究领域:
药剂学
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tianyi Zhang,Bo Yang,Ming Hao,Xiaodong Hu,Yanbo Liu,Xiaoxiao Wang
Flexible piezoelectric nanogenerators (PENGs) are emerging as sustainable power sources for self-charging wearable electronic devices due to their capability to harvest mechanical energy from the environment. Here, we have developed a high-output flexible PENGs based on electrospun composite nanofibers involving poly(vinylidene fluoride) (PVDF), barium titanate modified by dopamine hydrochloride (PDA@BTO) with an enhanced electroactive phase. On addition of 3 wt % PDA@BTO nanoparticles, the electroactive β-phase of the PVDF is found to be intensified to ∼88.05% as account of the synergistic interfacial interaction between the PDA@BTO nanoparticles and the ferroelectric host polymer substrate on electrospinning. The introduction of carbon black (CB) promotes piezoelectric charge transfer and increases output power. The PBTO/CB/PVDF composite nanofibers delivered the highest V OC of 55 V and the optimal I SC 3.1 μA with 3% PBTO and 1% CB. The fabricated PENG based PBTO/CB/PVDF composite nanofibers successfully charged capacitors with capacities of 0.1 μF, 0.33 μF, and 1 μF to voltages of 1.9 V, 3.2 V, and 10 V within 400 s, respectively. The device has response time of 0.1 s and the d 33 piezoelectric constant of 1.7 pC/N. The piezoelectric devices exhibited minimal variation in voltage and excellent stability over 900 cycles and the prepared piezoelectric device can light up to 20 LEDs. The potential of the piezoelectric composite nanofiber membranes for assembling mechanical energy collectors and piezoelectric sensors was demonstrated.
研究领域:
材料科学
·
能源工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Jiebing Jiang,Xueni Sun,Yan Li,Chunhui Deng,Gengli Duan
Metal ions differed greatly in affinity towards phosphopeptides, and thus it is essential to systematically compare the phosphopeptides enrichment ability of different metal ions usually used in the IMAC techniques. In this work, for the first time, eight metal ions, including Nb 5+ , Ti 4+ , Zr 4+ , Ga 3+ , Y 3+ , In 3+ , Ce 4+ , Fe 3+ , were immobilized on the polydopamine (PDA)-coated Fe 3 O 4 (denoted as Fe 3 O 4 @PDA-M n+ ), and systematically compared by the real biosamples, in addition to standard phosphopeptides. Fe 3 O 4 microspheres were synthesized via the solvothermal reaction, followed by self-polymerization of dopamine on the surface. Then through taking advantage of the hydroxyl and amino group of PDA, the eight metal ions were easily adhered to the surface of Fe 3 O 4 @PDA. After characterization, the resultant Fe 3 O 4 @PDA-M n+ microspheres were applied to phosphopeptides enrichment based on the binding affinity between metal ions and phosphopeptides. According to the results, different metal ions presented diverse phosphopeptides enrichment efficiency in terms of selectivity, sensitivity and the enrichment ability from real complex samples, and Fe 3 O 4 @PDA-Nb 5+ and Fe 3 O 4 @PDA-Ti 4+ showed obvious advantages of the phosphopeptides enrichment effect after the comparison. This systematic comparison may provide certain reference for the use and development of IMAC materials in the future.
研究领域:
生物化学
·
分析化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Temitope Fausat Ajibade,Huali Tian,Kayode Hassan Lasisi,Kaisong Zhang
The use of membrane filtration for saline oily wastewater separation remains challenging for industry application despite the progress in membrane technology. The use of two-dimensional (2D) nanoparticles is well known for improving membrane properties, yet they are still vulnerable to fouling and operational inconsistencies. In providing solutions, bio-inspired PDA@WS 2 PAN UF membrane was fabricated with tailored molecular weight cutoff (MWCO) and excellent selectivity for effective removal of oil and dye in a saline environment. At high salinity, the modified membrane with the lowest MWCO of 5308.53 Da and Stokes diameter of 2.17 nm showed sufficient separation of oil and dye of about 99.53% and 98.23% respectively. Concurrently sustaining high water permeability of 58.57 L m −2 h −1 with free transport of monovalent and divalent salts. Moreover, due to the synergistic effect of the adhesive PDA with WS 2 nanosheet and PAN, the modified membrane displayed outstanding oil repellency and antifouling properties of about 98.6%. Furthermore, excellent thermal stability between the temperature of 100–900 °C, and pressure stability ranging from 1 bar to 6 bar of the modified membranes was reported. Overall, the operational stability of the modified membrane was sustained with high removal of oil and dye, and permeation of salt over a 90 h long-term operation. Consequently, this study demonstrates the potential application of bio-inspired PDA@WS 2 PAN membrane for the treatment of saline oily wastewater.
研究领域:
环境科学
·
材料科学
·
膜技术
✓ 已验证
DOI
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
·
材料科学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 11
·2337-2350
·
IF 1.638
Wang Jianyu,Cheng Guang,Lu Jian,Chen Huafeng,Zhou Yanbo
In this study, 4,4′-(hexafluoroisopropene) diphthalic acid (PDA)-CD polymers containing β -cyclodextrin (CD) were synthesized for the adsorption of endocrine disrupting chemicals (EDCs) and dyes. It features great adsorption of bisphenol A (BPA), methylene blue (MB) and neutral red (NR). The maximum adsorption capacities of MB, NR and BPA can reach 113.06, 106.8 and 51.74 mg/g, respectively. The tandem adsorption results revealed that adsorptions of dyes and BPA onto PDA-CD polymer were two independent processes: non-polar BPA entrapment by cyclodextrin cavities while dyes were captured by the carboxyl groups and π - π stacking interactions. The adsorption processes performed well in a wide range of pH (4.0–10.0) and were not affected by fulvic acid (FA) and inorganic ions.
研究领域:
环境化学
·
材料科学
·
污染控制
·
吸附技术
·
环境功能材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Guanghui Liu,Qingshan Xiong,Yunqi Xu,Qunling Fang,Ken Cham-Fai Leung,Min Sang,Shouhu Xuan,Lingyun Hao
Harmful bacteria are common substances in water that endanger human health, so it is urgent to establish a simple system that can tackle these hazardous substances simultaneously. In this work, a novel magnetic MXene@Fe 3 O 4 /Au/polydopamine (PDA) nanosheet with excellent photothermal-magnetolytic coupling antibacterial performance is developed. MXene , Au and polydopamine all have good photothermal properties, so the photothermal conversion efficiency of the MXene@Fe 3 O 4 /Au/PDA nanosheet reaches as high as 48.7%. After 6 min of 808 nm laser irradiation, the MXene@Fe 3 O 4 /Au/PDA nanosheets (120 μg·mL −1 ) can achieve nearly 100% antibacterial effect against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). In comparison to the sole photothermal treatment, the nanosheet at lower concentration (80 μg·mL −1 ) also exhibit stronger antibacterial properties against both Gram-negative and Gram-positive bacteria during the photothermal-magnetic coupling treatment. The result is mainly because the heat generated by the photothermal effect of the nanosheet is directly transferred to the cell membrane, and the edge of the nanosheet cuts the cytomembrane similar to a magnetic “hot nanoblade”, resulting in subsequent shrinkage, deformation and even rupture.
研究领域:
材料科学
·
微生物学
·
生物医学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Li Song,Chunping Su,Hui Li,Huiping Zhao,Rong Chen
To achieve an effective and straightforward method for Cr(VI) removal from industrial wastewater, a composite Bi 2 S 3 /PDA/PEI material (BSPP) was successfully prepared through in-situ polymerization of polydopamine (PDA) followed by chemical grafting with polyethylenimine (PEI) on the surface of Bi 2 S 3 materials for round-the-clock highly efficient Cr(VI) removal from actual industrial electroplating wastewater. Under dark conditions, the maximum adsorption capacity of Cr(VI) by BSPP reaches 780.75 mg/g. Interestingly, when exposed to light, the maximum Cr(VI) removal capacity was further increased to 1333.21 mg/g. X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma optical emission spectrometry (ICP-OES) analyses indicate that BSPP not only reduces Cr(VI) to Cr(III) under light condition, but also facilitates the significant decrease of total chromium content. Notably, under natural sunlight exposure outdoors, BSPP is capable of completely eliminating Cr(VI) from both plating cleaning solutions and waste plating solutions. More importantly, BSPP maintains its original Cr(VI) removal efficiency after nine cycles within plating cleaning solutions and six cycles within waste plating solutions. Large-scale testing results indicate that BSPP can effectively treat substantial volumes of electroplating wastewater to comply with national Cr(VI) discharge standards. These findings suggest that BSPP represents a promising material for continuous 24-hour Cr(VI) treatment in industrial electroplating wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Qunling Fang,Jing Wang,ShanShan Wu,Ken Cham-Fai Leung,Yunqi Xu,Shouhu Xuan
Pathogenic bacteria and difficult-to-degrade pollutants in water have been serious problems that always plague people. Therefore, finding a “one stone-two birds” method that can quickly catalyze the degradation of pollutants and show effective antibacterial behavior become an urgent requirement. This work reports a facile one-step strategy for fabricating a Rambutan-like Fe 3 O 4 @AgAu@PDA (Fe 3 O 4 @AgAu@Polydopamine) core/shell nanosphere with both catalytic and antibacterial activities which can be critically improved by externally applying an NIR laser irradiation (NIR, 808 nm) and a rotating magnetic field. Typically, the Rambutan-like Fe 3 O 4 @AgAu@PDA nanosphere have a rather rough surface due to the AuAg bimetallic nanorods sandwiched between the Fe 3 O 4 core and the PDA shell. Owing to the penetrated PDA shell, AgAu nanorods show high and magnetically recyclable photothermal-enhanced catalytic activity for the reduction of 4-nitrophenol to 4-aminophenol and they can also be applied to initiate TMB oxidation under the help of NIR heating condition. Moreover, Fe 3 O 4 @AgAu@PDA shows a moderate antibacterial activity due to the weak release of Ag + . Under applying a rotating external magnetic field, the rough-surface Fe 3 O 4 @AgAu@PDA nanospheres produce a controllable magnetolytic force on the bacterial due to their good affinity. As a result, the Fe 3 O 4 @AgAu@PDA nanospheres show a "magnetolytic-photothermal-Ag + " synergistic antibacterial behavior against E. coli and S. aureus .
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
BMC Oral Health
·
2024
·Vol. 24
·期 1
·1-17
·
IF 2.6
Li Yaoyao,Huang Xinhui,Fu Weihao,Zhang Zonghao,Xiao Kuancheng,Lv Hongbing
Reduced graphene oxide (rGO) is an graphene oxide (GO) derivative of graphene, which has a large specific surface area and exhibited satisfactory physicochemical characteristics. In this experiment, GO was reduced by PDA to generate PDA-GO complex, and then PDA-GO was combined with Chitosan (CS) to synthesize PDA-GO/CS composite scaffold. PDA-GO was added to CS to improve the degradation rate of CS, and it was hoped that PDA-GO/CS composite scaffolds could be used in bone tissue engineering. Physicochemical and antimicrobial properties of the different composite scaffolds were examined to find the optimal mass fraction. Besides, we examined the scaffold’s biocompatibility by Phalloidin staining and Live and Dead fluorescent staining. Finally, we applied ALP staining, RT-qPCR, and Alizarin red S staining to detect the effect of PDA-GO/CS on the osteogenic differentiation of human dental pulp stem cells (hDPSCs). The results showed that PDA-GO composite was successfully prepared and PDA-GO/CS composite scaffold was synthesized by combining PDA-GO with CS. Among them, 0.3%PDA-GO/CS scaffolds improves the antibacterial activity and hydrophilicity of CS, while reducing the degradation rate. In vitro, PDA-GO/CS has superior biocompatibility and enhances the early proliferation, migration and osteogenic differentiation of hDPSCs. In conclusion, PDA-GO/CS is a new scaffold materialsuitable for cell culture and has promising application prospect as scaffold for bone tissue engineering.
研究领域:
生物材料学
·
组织工程学
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Shiyang Li,Chenchen Zheng,Longdou Tu,Dajian Cai,Yangxiang Huang,Congjie Gao,Yeqiang Lu,Lixin Xue
Tight ultra-filtration (TUF) membranes were constructed by in situ growing zinc imidazole frameworks micro-crystalline leaves (ZIF-L) in polyethylene imine (PEI) and polydopamine (PDA) deposit layers on porous polyethylene (PE) substrates. The effects of preparation conditions on the surface physical and chemical structures as well as on the dye/salt separation performance of the formed TUF membranes were systematically investigated. By inserting selective water permeation channels and increasing contacting surface areas, in situ-grown ZIF-L arrays tightly cross-linked in the coating matrix greatly increased water permeation without trading off dye/salt retention selectivity. The morphology of the included ZIF-L particles could be varied by adjusting the ligand/Zn molar ratio (α) in the preparation processes. Optimized PDA-PEI/ZIF-L@PE TUF membranes containing ZIF-L of cross-cross block morphology showed very high pure water permeability of 180 ± 20 L·m −2 ·h −1 ·bar −1 (LMHB) and retention selectivity (S CR/Na2SO4 and S MB/Na2SO4 ) of 267 and 43, respectively, as well as excellent stability and anti-fouling properties.
研究领域:
材料科学
·
环境工程
✓ 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）