Journal of the Iranian Chemical Society
·
2024
·Vol. 21
·期 3
·877-885
·
IF 2.2
Liu Gang,Liu Lihui,Zhou Yuyi,Wang Ya,Sui Guoqi,Zhang Peng
In this study, Bi 2 O 3 nanoparticles are prepared via an impregnation method and modified using multi-walled carbon nanotubes (MWCNTs) and PW 12 . XRD reveals that the prepared Bi 2 O 3 corresponded to the monoclinic α -phase. SEM results reveal that the composite consists of a series of nanosheets with flower-like structures. In this study, malachite green (MG) is used as a simulated contaminant to test the degradation capability of the compound under sunlight, and the effect of PW 12 doping on the photocatalytic properties of the sample is investigated. The results show that the degradation kinetic constant of 0.3 PW 12 /MWCNTs/Bi 2 O 3 (0.8125 h −1 ) is about 3 times that of Bi 2 O 3 (0.2767 h −1 ). The ternary complex containing 30% PW 12 has a degradation rate of 95% in 2.5 h. h + and \(^\cdot {\text{O}}_2^-\) were the major active species in the photocatalytic degradation of MG.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Ruixiang Yang,Shan Zhong,Lishan Zhang,Baojiang Liu
In the drive toward green and sustainable chemistry in wastewater treatment, it is necessary to explore more efficient and stable photocatalysts to achieve the degradation of antibiotic and reduction of heavy metal ions. To this end, an organic-inorganic hybrid PW 12 /CN@Bi 2 WO 6 composite photocatalyst was prepared: PW 12 /CN composite was prepared by heating H 3 PW 12 O 40 , melamine and phytic acid; PW 12 /CN@Bi 2 WO 6 was synthesized via PW 12 /CN and Bi 2 WO 6 by hydrothermal method. The photocatalytic activity of as-prepared photocatalyst was evaluated by degrading tetracycline hydrochloride (TC) and reducing hexavalent chromium (Cr(VI)) under the simulated xenon light source. The results show the PW 12 /CN@Bi 2 WO 6 composite always maintains high catalytic performance for TC and Cr 6+ and has well cycle stability. After irradiation for 90 and 100 min, the most effective 10%-PW 12 /CN@Bi 2 WO 6 achieved a removal rate of 98.7% for Cr(VI) and 97.5% for TC. Photoluminescence spectroscopy and photoelectrochemical results demonstrate that the charge separation is enhanced for the PW 12 /CN@Bi 2 WO 6 , attributed to the introduction of the organic-inorganic systems to enhance the absorbance of light energy, promote charge transfer and inhibit e − and h + pair recombination. In addition, the free radical scavenging test and electron spin resonance analysis (ESR) test indicate that the main species of action are h + and O 2 − in the photocatalytic oxidation reaction. Further, the mechanism of photocatalysis was proposed by Mott-Schottky. The strategy improving catalytic performance through organic-inorganic hybrid systems provides a new route for the development of photocatalysts.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Lanjie Li,Xinmin Yu,Lei Xu,Yahui Zhao
Metalloporphyrinic metal-organic framework (PCN-222) is a promising photocatalytic material due to its large surface area and 1D channel, exceptional stability, high visible-light capture capability, and semiconductor properties. Herein, we constructed a highly efficient visible-light-driven type II heterojunction photocatalyst PCN-222-PW 12 /TiO 2 by one step solvothermal method. The 5 wt% PCN-222-PW 12 /TiO 2 showed the superior photocatalytic properties for degrading rhodamine B (RhB) and Ofloxacin, which are 10.69 and 10.48 times higher than pure TiO 2 under same conditions. The excellent photocatalytic performance of PCN-222-PW 12 /TiO 2 ternary composite material was attributed to the improved adsorption capacity of organic pollutants, optical absorption in the entire visible light region, and highly-efficient separation of photoinduced carriers. Besides, we found that h + , O 2 − , and OH are the main active elements in the photocatalytic degradation process. This will back up the higher photocatalytic activity of PCN-222-PW 12 /TiO 2 compared with pure TiO 2 . The photocatalytic efficiency of composite maintained a similar level of photoactivity after four times recovery, which showed excellent stability and recyclability of PCN-222-PW 12 /TiO 2 . This work provides new insights into the fabrication porphyrin-MOF composite materials with high photocatalytic efficiency for environmental remediation.
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
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 33
·15721-15730
·
IF 3.3
Wanyu Song,Peng Sun,Jihong Zhou,Xu Han,Qijun Dai,Fang Chai
The Keggin phosphotungstic acid (PW12) embedded metal–organic framework copper benzene-1,3,5-tricarboxylate (CuBTC), CuBTC@PW12, was fabricated by a facile hydrothermal synthesis technique. With a unique tetrakaidecahedron structure and multiple active sites, the obtained CuBTC@PW12 exhibited peroxidase-mimicking activity, which promoted a novel strategy for qualitative and quantitative detection of hydrogen peroxide (H2O2) and sequential sensing of ascorbic acid (AA) via colorimetric evolution. Notably, with the advantages of strong redox performance of POMs and the unique porous structure of metal organic frameworks (MOFs), as peroxidase mimics, CuBTC@PW12 achieved highly selective and sensitive detection of H2O2via oxidizing TMB to a blue oxidation product (ox-TMB), with a limit of detection of 2.67 μM within the 0.01 to 1.0 mM scale. Concomitantly, the AA can be monitored consecutively by reducing the ox-TMB with fading blue color quantitatively with a limit of detection at 0.15 μM in the range of 0.01–0.10 μM. The recoveries for the determination of AA in human serum were obtained at 94.63–105%. These results manifested that CuBTC@PW12 could be used as a peroxide-mimetic enzyme for the continuous detection of H2O2 and AA with the advantages of simplicity, efficiency, sensitivity and accuracy.
研究领域:
材料科学
·
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
He Xun,Yao Yongchao,Zhang Min,Zhou Yilei,Zhang Limei,Ren Yuchun,Dong Kai,Tang Hong,Nan Jue,Zhou Xingli,Luo Han,Ying Binwu,Yu Qi,Luo Fengming,Tang Bo,Sun Xuping
Seawater electrolysis driven by offshore renewable energy is a promising avenue for large-scale hydrogen production but faces challenges in designing robust anodes that suppress surface chlorine reactions and corrosion at high current densities. Here we report a strategy by selectively docking PW 12 -polyoxometalate (PW 12 -POM) onto Fe sites of CoFe hydroxide anode to modulate the electronic structure of adjacent Co active centers and regulate Cl⁻/OH⁻ adsorption for efficient alkaline seawater oxidation. Our CoFe-based anode achieves low overpotentials, high catalytic selectivity, and notable durability, with continuous operation at 1 A cm⁻² for over 1300 hours and at 2 A cm⁻² more than 600 hours. Theoretical calculations and ex situ/in situ analyses reveal that PW 12 -POM coordination at Fe sites stabilizes Fe, suppresses its leaching, modulates Co acidity, promotes OH⁻ adsorption, and protects metal sites from Cl⁻ corrosion.
研究领域:
电化学
·
材料科学
·
能量转换
·
催化
·
可再生能源
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 60
·38016-38025
·
IF 3.361
Yuxin Zhang,Xinluo Song,Shicong Li,Bangyao Zhao,Liangliang Tong,Yuanrui Wang,Yafeng Li
A polyoxometalate acid can be encapsulated into a metal–organic framework to construct a novel kind of solid-acid catalyst. In this work, the two-step method —high-temperature preparation of Zr6O4(OH)4(CH3COO)12 and low-temperature self-assembly—has been adopted to synthesize the PW12@UIO-66 composite (PW12 = H3PW12O40; UIO-66 = Zr6O4(OH)4(OOC–C6H4–COO)12). The as-synthesized PW12@UIO-66 composite exhibits highly crystalline, good octahedron morphology, large specific surface area (1960 m2 g−1) and high thermal stability (>500 °C), which clearly demonstrates the potential as a solid-acid catalyst. Additionally, the PW12@UIO-66 composite may be accomplished with 85% utilization of H3PW12O40 and 95% yield through this synthetic procedure. The performances of the PW12@UIO-66 composite are investigated by catalyzing the simultaneous transesterification and esterification of soybean oil into biodiesel. Under the optimal conditions, the conversion of the soybean oil into biodiesel would exceed 90% over the as-synthesized PW12@UIO-66 composite. As the crucial indexes for industrial prospects, the recycling and life experiments were surveyed. After 10 times recycling and 4 weeks, the structure and performance of the PW12@UIO-66 composite remained unchanged and in the meantime the PW12@UIO-66 composite still maintained a high activity to convert soybean oil into biodiesel.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2016
·
IF 4.012
Wenwen Ma,Yan Xu,Kaiwen Ma,Hong Zhang
H 3 PW 12 O 40 /TiO 2 (abbreviated PW 12 /TiO 2 ) nanofibers catalysts have been successfully prepared via calcinating off the respective electrospun PVP/[PW 12 + Ti(OC 4 H 9 ) 4 ] composite nanofibers for the first time and they show ultra-deep desulfurization catalytic performance in mild conditions. PW 12 /TiO 2 nanofibers consist of anatase phase TiO 2 and Keggin structure PW 12 , the diameter of which is approximately 100 nm. Compared with PW 12 /TiO 2 nanoparticles, 40 wt.% PW 12 /TiO 2 nanofibers (the weight percentage of PW 12 loading on TiO 2 nanofibers was 40%) exhibited the higher catalytic activity under the same conditions. DBT could be removed completely within 30 min at 70 °C using 0.02 g 40 wt.% PW 12 /TiO 2 nanofibers as catalysts, when ionic liquid (IL) [Bmim]PF 6 was as extraction agent. Additionally, sulfur removal of different substrates decreased in the following orders: DBT > BT > 4,6-DMDBT under the same conditions. Even after 5-times recycling, the catalytic activity of 40 wt.% PW 12 /TiO 2 nanofibers was not significant decreased. As a total result, these novel PW 12 /TiO 2 nanofibers can be used to deeply desulfurize in the industry.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2025
·
IF 2
Yali Zhao,Ziru Wang,Jinxiu Zhai,Xingjian Cao,Peilei He
Graphical The lacunary polyoxometalate ([PW 11 O 39 ] 7− , PW 11 ) can self-assemble with TBAB to form tetrakaidecahedron-like nanodices (NDs). These NDs exhibit significantly higher catalytic activity for the epoxidation of cyclooctene compared to PW 11 alone and nanospheres (NSs) formed from the non-lacunary polyoxometalate ([PW 12 O 40 ] 3− , PW 12 ). DFT studies confirm the critical role of hydroperoxo species generated at the lacunary site in facilitating oxygen transfer to cycloalkenes over PW 11 . The activation of hydrogen peroxide (H 2 O 2 ) as a terminal oxidant holds great promise for catalytic oxidation processes. However, developing an efficient catalyst for the epoxidation of bulky organic molecules with H 2 O 2 , including cyclic alkenes, remains challenging. In this research, a lacunary polyoxometalate (POM)-based tetrakaidecahedron nanodices (NDs) are synthesized by [PW 11 O 39 ] 7− (PW 11 ) clusters with tetrabutylammonium bromide (TBAB). The NDs exhibit significantly enhanced catalytic activity in the epoxidation of cyclooctene, with a yield 55.4 times greater than that of the raw PW 11 . Conversely, nanospheres (NSs) assembled from non-lacunary POM clusters of [PW 12 O 40 ] 3− (PW 12 ) under the same conditions achieve only a 2.9 % yield, highlighting the essential role of the lacunary PW 11 structure in NDs. Raman spectroscopy and density functional theory (DFT) calculations confirm that the active hydroperoxo species from H 2 O 2 activation serves as the effective epoxidizing agent. The reduced energy barrier for H 2 O 2 activation on PW 11 , relative to PW 12 , corroborates the superior activity of the NDs. Furthermore, the intermediate generated post-H 2 O 2 activation shows stronger adsorption of cyclooctene, increasing oxygen transfer to cyclooctene during the epoxidation process. This study demonstrates the exceptional performance of an assembly structure utilizing lacunary POMs for the activation of H 2 O 2 and subsequent oxidation reactions.
研究领域:
催化化学
·
材料科学
·
理论计算化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Zhuwei Yang,Jian Yang,Xiaoyu Dong,Yangyang Zhao,Wanqin Yang,Bohan Lei,Lihua Zheng,Hancheng Zhu,Changshan Xu,Y. L. Bao,Yuxue Liu
Near-spherical core-shell PLNP@PDA nanoplatforms with an average diameter of 58.6 nm were successfully synthesized by covalently conjugating persistent luminescent nanoparticles (Zn2Ga2.96Ge0.75O8:Cr3+0.02,W6+0.01@SiO2-NH2, PLNPs) with polydopamine (PDA) photothermal agents via Michael addition and Schiff base reactions. Compared to electrostatic self-assembly nanoplatforms, the constructed core-shell PLNP@PDA@PW12 nanoplatforms (58.8 nm) maintained structural integrity even after high-speed of 4 m/s (ten times higher than the average blood flow velocity) simulated circulation for 1 h, demonstrating their remarkable structural stability attributed to the increased interfacial contact area and strong interactions between PLNPs and PDA. These core-shell nanoplatforms, benefiting from the inherent biocompatibility of PDA and the modification of phosphotungstic acid (PW12), exhibited excellent biosafety, maintaining 97.7% viability of mouse fibroblast cells (L929) at 200 μg/mL. In particular, the constructed core-shell nanoplatforms exhibited a high photothermal conversion efficiency of 49.7% under 635 nm excitation, owing to the pronounced photothermal effect of PDA. In vitro tests demonstrated bacterial eradication rates of 93.6% against Staphylococcus aureus (S. aureus) and 94.4% against Escherichia coli (E. coli) after four treatments with a human-safe laser dose (0.2 W/cm2) penetrating through 3 mm of tissue. In in vivo bacterial-infected wound models, the PLNP@PDA@PW12 nanoplatforms increased the local tissue temperature within the wound under 635 nm laser irradiation, significantly inhibiting bacterial infection and accelerating wound healing. These PDA-based core-shell nanoplatforms with superior stability, biocompatibility, tissue-penetrating antibacterial capacity, and afterglow-temperature-guided precision photothermal therapy are highly promising candidates for clinical applications.
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Huiwen Shi,Yanyan Yang,Bo Fu,Yingying Song,Fengru Li,Yongqi Yang,Hua Jin,Xiaoshu Qu
As a tungsten oxide with a unique stoichiometric ratio, W 18 O 49 exhibits localized surface plasmon resonance (LSPR) effects that significantly enhance its electrochromic (EC) properties; however, the modulation mechanism of this enhancement remains underexplored. In this study, we use Keggin-type H 3 PW 12 O 40 (PW 12 ) and W 18 O 49 to successfully fabricate a film (W 18 O 49 /PW 12 ) with high transmittance via the Layer-by-Layer (LbL) method. The films exhibit coloration efficiencies of 91.65 and 156.58 cm 2 /C at 650 and 1100 nm, respectively, and a specific capacitance of 14.34 mF/cm 2 . Although the EC performance of PW 12 is negligible, its multi-electron structure and interactions with W 18 O 49 increase the concentration of oxygen vacancies in the W 18 O 49 /PW 12 film, thereby enhancing the LSPR effect. The bandgap of the W 18 O 49 /PW 12 film decreases, resulting in superior EC ability and energy storage activity, while achieving a thermal blocking efficiency of 54.94 %. The W 18 O 49 /PW 12 film combined with NiO is assembled into electrochromic devices (ECDs) that achieve a thermal blocking efficiency of 79.12 % at −2.3 V. This study is pivotal for elucidating the mechanism by which polyoxometalates regulate the LSPR effect of W 18 O 49 and offers new insights into the development of multifunctional ECDs that integrate light and thermal modulation, as well as energy storage.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）