JOURNAL OF THE INDIAN CHEMICAL SOCIETY
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2024
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IF 3.2
A. Anbu,M. Dilipkumar,K. Jeyajothi,M. Rajasimman,M.S. Manojkumar
In the case of the current research, an easy and effective procedure for fabricated magnetized distinguishable core-shell organized Ag–ZrO 2 /Fe 3 O 4 @TiO 2 QNCs with comprised of a magnetically charged Fe 3 O 4 core, a mesoporous ZrO 2 @TiO 2 interlayer, as well as a protective outer Ag nanoparticles wrap has been offered applying capsicum fruit extract manipulate, a chemico-pyto approach. And thereby produced Ag–ZrO 2 /Fe 3 O 4 @TiO 2 QNCs have been evaluated through TEM and SEM visuals, EDX and XRD spectrum. The fact that their photocatalytic function for the breakdown of methylene blue upon UV light was investigated. The outcomes of Ag–ZrO 2 /Fe 3 O 4 @TiO 2 nanocomposites had stronger photocatalytic abilities. The PL evaluation indicated that Ag–ZrO 2 /Fe 3 O 4 @TiO 2 composites had higher couple of electrons and holes separation effectiveness over Ag–ZrO 2 /Fe 3 O 4 @TiO 2 . On top of that, the Ag–ZrO 2 /Fe 3 O 4 @TiO 2 nanocomposites can potentially be readily segregated as well as recovered using an ambient magnetized sector, indicating their high functionality.
研究领域:
材料科学
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环境科学
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植物化学
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产品关联
DOI
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.
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DOI
高影响因子
SOLAR ENERGY
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2019
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IF 4.674
Lei Shi,Xinzhi Wang,Yanwei Hu,Yurong He
The significant improvement in photocatalytic activity achieved in recent years has generated widespread attention due to its utilization in solar energy. In this study, two shapes of magnetic nanoparticles were synthesized using hydrothermal method. The magnetic nanoparticles exhibited superior photocatalytic activity for water treatment, which takes into consideration the photo-thermal conversion of magnetic nanoparticles. The effect of morphology on the photo-degradation was analyzed by the specific surface area measurement and photoluminescence test. Furthermore, the suspension degradation rate with magnetic nanoparticles was enhanced by ~200% compared to a commercial photocatalyst. Moreover, the photo-degradation efficiency further increased from 96.4 to 99.6% with the magnetic field intensity increased because of the absorbance ability enhancement. This result indicates that the photocatalytic activity of a magnetic photocatalyst can be enhanced through photo-thermal conversion and magnetic field regulation, which expands the application of solar power technology.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2025
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IF 4.9
Meng Cheng,Mengyao Hua,Siyi Wang,Yuhang Duan,Lei Xu,Yafen Zhou
TiO 2 and its composites have drawn extensive focus from researchers on account of their ability to convert formaldehyde into harmless H 2 O and CO 2 under light irradiation at room temperature, along with their low toxicity, simple operation, low cost and reusability. In this study, a MOF@Fe 3 O 4 –TiO 2 photocatalyst with synergistic degradation effects was synthesized via ultrasonic-assisted impregnation method and comprehensively characterized. Results show that this composite can efficiently remove formaldehyde through its self-established adsorption-degradation-reabsorption cycle (85.50 % within 5.5 h; 92.60 % within 24 h). Moreover, it exhibits enhanced transient photocurrent, which not only facilitates the segregation of electrons and holes across Fe 3 O 4 –TiO 2 heterostructure but also promotes generation and transport of photogenerated electrons between the Fe 3 O 4 –TiO 2 heterojunction and MOF, endowing the catalyst with excellent conductivity and full-spectrum-driven photocatalytic activity. Additionally, EPR and stability tests reveal that the composite decomposes formaldehyde to carbon dioxide and water through formation of two reactive oxygen species (•O 2 − and •OH) and demonstrates good stability.
研究领域:
材料科学
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环境催化
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纳米复合材料
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光催化
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空气污染控制
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产品关联
DOI
高影响因子
TALANTA
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2022
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IF 6.556
Jinpeng Tao,Zaiqiong Liu,Zhenyu Zhu,Yanli Zhang,Hongbin Wang,Pengfei Pang,Chun Yang,Wenrong Yang
An ultrasensitive electrochemical detection of the activity and inhibition of T4 polynucleotide kinase (T4 PNK) was developed by using magnetic Fe 3 O 4 @TiO 2 core-shell nanoparticles , which was triggered by a rolling circle amplification strategy (Fe 3 O 4 @TiO 2 -RCA). We used Fe 3 O 4 @TiO 2 as a substrate to anchor a DNA primer . DNA S1 with 5′-OH termini was phosphorylated in the presence of T4 PNK and ATP, which was adsorbed on the surface of Fe 3 O 4 @TiO 2 NPs and served as the primer for subsequent RCA reactions. After adding circular template DNA S2, RCA was initiated in the presence of phi29 DNA polymerase and dNTPs. Then, Fc-labeled DNA S3 (Fc-S3) was hybridized with RCA. The obtained Fe 3 O 4 @TiO 2 -RCA was adsorbed on the surface of a magnetic gold electrode (MGE) by magnetic enrichment, resulting in an enhanced electrochemical signal. The T4 PNK activity can be monitored by measuring the electrochemical signal generated. This electrochemical assay is sensitive to the activity of T4 PNK with a dynamic linear range of 0.00001–20 U/mL and a low detection limit of 3.0 × 10 −6 U/mL. The proposed strategy can be used to screen the T4 PNK inhibitors, so it has great potential in the discovery of nucleotide kinase-target drug and early clinical diagnosis of cancer.
研究领域:
生物化学
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分析化学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Yuanyuan Du,Hongmei Liu,Ying Chen,Yiran Tian,Xiaoling Zhang,Chenjie Gu,Tao Jiang,Jun Zhou
In the field of SERS-based immunoassay, the recyclable utilization of noble metal materials is essential for their practical application in clinical medicine. Herein, a kind of novel multifunctional Fe 3 O 4 @TiO 2 @Ag microparticles (MPs) was synthesized through a poly-step reaction, and then their feasibility for recyclable label-free SERS-based immunoassay of prostate specific antigen (PSA) was demonstrated. The photocatalytic efficiency of the Fe 3 O 4 @TiO 2 @Ag MPs was fully adjusted by tuning the thickness of the middle TiO 2 shell and the areal density of the outside Ag NPs. Particularly, the Fe 3 O 4 core played a critical role in further improving the photocatalytic activity under external magnetic field. Thereafter, the successfully photocatalytic degradation and recyclable detection of PSA in human serum was confirmed by the change of O 1s, N 1s, and C 1s signals in the XPS characterization and a limit of detection as low as 16.25 pg/mL was realized. Furthermore, the quantitative recyclable detection of PSA in clinical serum samples with prostate cancer was conducted, and the results are basically consistent with those of the traditional chemiluminescent immunoassay, showing small relative deviation less than or equal to 5.7%.
研究领域:
分析化学
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生物医学工程
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纳米技术
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临床医学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2019
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IF 3.858
Jia Liu,Run-Tian Ma,Yan-Ping Shi
With the increasing demand for lipase inhibitors and new drugs used in the clinical treatment of obesity, it is of great significance to screen lipase inhibitors from traditional Chinese medicines (TCMs) via capillary electrophoresis. In this work, Fe 3 O 4 @TiO 2 nanoparticles was fabricated by solvothermal method and employed as an improved magnetic support to immobilize lipase through electrostatic interaction. By the method of transmission electron microscopy, fourier transform infrared spectroscopy and X-ray diffraction, the magnetic nanoparticles were characterized. The immobilized enzyme possessed advantages of a wider range for pH and temperature endurance, better storage stability and reusability. The kinetics performances of the immobilized lipase were studied. When p-Nitrophenyl palmitate (pNPP) was used as enzyme substrate, the Michaelis-Menten constant was calculated to be 2.51 mM and its inhibition constant for Orlistat was ascertained to be 13.41 μM. Ultimately, the established method was applied to lipase inhibitors screening from 6 Tibetan medicines with lipase inhibitory activity and Oxytropis falcate Bunge was screened out for its supreme lipase inhibitory activity. 11 compounds in the Oxytropis falcate Bunge were further screened, five compounds exhibited similar inhibitory activity to Orlistat, and one compound (kaempferol) presented better inhibitory activity than Orlistat, which is the most commonly used drugs to treat obesity in clinic. This work not only developed a method for new anti-obesity drugs discovery, but also provided inspiration for exploring new medicinal value of the TCMs.
研究领域:
药学
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生物技术
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中药学
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药物发现
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2020
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IF 7.632
Yiran Tian,Hongmei Liu,Ying Chen,Chenjie Gu,Guodong Wei,Tao Jiang
Sophisticated surface-enhanced Raman scattering (SERS)-active nanocomposites with both self-correction and cleaning capabilities provide new perspectives for the quantitative detection and degradation of hazardous molecules. In this work, a multifunctional GO-coated Fe3O4@TiO2@AuAg SERS substrate was developed. Attributed to the magnetic core, a relatively uniform substrate was induced by an external magnetic field and a sensitive SERS-based detection of trace mixed additives in foods was facilitated by electromagnetic enhancement from the well-modified Au/Ag binary nanoparticles in conjunction with the molecular enrichment ability of the GO. Particularly, the intrinsic Raman signal at 149 cm–1 of TiO2 was fully exploited to act as an intrinsic internal standard for the improvement of the quantitative level of such detection. Additionally, the efficient green elimination of these target molecules within 60 min was enabled by the multifunctional TiO2 layer. It is expected that this novel SERS substrate with both quantitative analytical and photocatalytic capability may extend to a broad application for detecting analytes in complex systems.
研究领域:
分析化学
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纳米技术
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食品科学
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环境科学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
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2024
·
IF 2.9
Yuhai He,Chen Wang,Qiuhua Wu,Guolin Zhang
In this paper, a new Janus-structured nano drug delivery carrier Fe3O4@TiO2&mSiO2 was designed and synthesized, which consisted of a spherical head and a closely connected rod. The head was a nanocomposite of core/shell structure with magnetic spinel ferric tetraoxide core and anatase titanium dioxide shell (Fe3O4@TiO2), and the rod was ordered mesoporous silica (mSiO2). The nanocarriers showed excellent magnetic targeting capability (saturation magnetization, 25.18 emu g-1). The core/shell heads endowed the carriers with fine microwave responsiveness. The pore volume of mesoporous nanocarriers was 0.101 cm3 g-1, and the specific surface area was 489.0 m2 g-1. Anticancer drug doxorubicin could be loaded in the mesoporous of the carriers to form Fe3O4@TiO2&mSiO2-DOX. The drug loading capacity was 10.4%. Fe3O4@TiO2&mSiO2-DOX exhibited acid-sensitive and microwavesensitive release properties along with good bio-compatibility. Fe3O4@TiO2&mSiO2 Janus nanoparticles are expected to be ideal drug carriers.
研究领域:
纳米技术
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药学
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材料科学
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生物医学工程
✓ 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）