POLYMER COMPOSITES
·
2025
·
IF 4.7
Lu Zhang,Zhongyang Bai,Yongchao Wang,Yingcheng Hu
This study aimed to fabricate carbon-plastic composites using acrylonitrile-butadiene-styrene (ABS) as the matrix material and modified porous graphite charcoal (PGC) as the reinforcement through a hot-pressing method. K 2 FeO 4 modification and acidification can promote the increase of the formation of graphitized structure and specific surface area, which improved the mechanical properties of ABS/PGC composites. Particularly, the 25 vol% ABS/PGC-H + composites exhibited maximum tensile strength and flexural strength of 36.40 and 47.57 MPa, respectively. The degradation temperature and the maximum weight loss temperature of 25 vol% ABS/PGC-H + composites decreased by 8°C and 12°C compared with ABS/PGC-900. It can be seen PGC modification reduced the thermal stability of the composites. Additionally, the resistivity of 25 vol% ABS/PGC-H + was 1.997 Ω*m lower than that of 25 vol% ABS/PGC-900, indicating improved conductivity. Moreover, the 25 vol% ABS/PGC-H + composite exhibited slightly higher dielectric properties and dielectric losses than 25 vol% ABS/PGC-900. Further research is needed to improve the performance of ABS/PGC through the optimization of the K 2 FeO 4 concentration and enhancement in the graphitization degree and porosity of PGC. These optimizations can strengthen the interactions between the filler and matrix, leading to excellent composite properties.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Qiuju Wang,Zhao Zhang,Guoren Xu,Guibai Li
Magnetic porous biochars (MC HCl , MC HAc ) with nanostructure on surfaces were prepared from penicillin fermentation dregs by pyrolysis with K 2 FeO 4 activation and used in penicillin adsorption. MC HCl and MC HAc had high BET surface areas of 672 and 735 m 2 /g, respectively; mainly be attributed to the activation of K 2 FeO 4 as well as acid pickling. Saturation magnetizations of MC HCl and MC HAc were 75.29 and 42.45 emu/g, respectively; the magnetism was mainly derived from the Fe 3 O 4 and Fe 3 C in magnetic biochars. MC HCl had nano sticks of ~ 80 nm and MC HAc had petal-like slice of ~ 30 nm on surfaces. The maximum adsorption capacities of penicillin on MC HCl and MC HAc were 196 and 322 mg/g at 308 K, respectively. The adsorptions of penicillin on MC HCl and MC HAc were consistent with pseudo primary kinetics and the Langmuir adsorption isotherm model, and thermodynamic analysis indicated that the adsorption mechanism included physical and chemical adsorption.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Zhiliang Cui,Guoren Xu,Banu Ormeci,Jiayin Hao
In this study, a novel magnetic material (MPC800) was synthesized from penicillin mycelial dreg via K 2 FeO 4 fabrication. The characterization results demonstrated that Fe 3 O 4 particles were successfully loaded on the surface of MPC800, which provided independent functional sites, with high surface area accompanied by strong magnetic separation performance. The removal capacities of Cu 2+ and Cd 2+ on MPC800 in the single-metal system reached 93.28 mg/g and 69.20 mg/, respectively, at 25 °C and pH 5.0, which were 12.31 and 19.60 times higher than those before activation. The sorption of Cu 2+ and Cd 2+ on MPC800 fitted well to the pseudo-second-order model and Langmuir isotherm model. In the binary-metals system, the sorption of Cu 2+ on MPC800 was slightly affected. At the same time, the uptake of Cd 2+ was severely inhibited, indicating that competitive adsorption occurred between the two metal ions , and the adsorption preference of Cu 2+ was better than that of Cd 2+ on MPC800. Furthermore, MPC800 was highly effective in metal ion solutions prepared with natural water and has an excellent recycling capacity.
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
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Tao Pei,Feng Shi,Can Liu,Yi Lu,Xu Lin,Defa Hou,Shunxiong Yang,Jirong Li,Zhifeng Zheng,Yunwu Zheng
In this study, a novel nitrogen-doped magnetic Fe–Ca codoped biochar for phenol removal was successfully fabricated via a hydrothermal and coactivation pyrolysis method. A series of adsorption process parameters (K 2 FeO 4 to CaCO 3 ratio, initial phenol concentration, pH value, adsorption time, adsorbent dosage and ion strength) and adsorption models (kinetic models, isotherms and thermodynamic models) were determined using batch experiments and various analysis techniques (XRD, BET, SEM-EDX, Raman spectroscopy , VSM, FTIR and XPS) to investigate the adsorption mechanism and metal-nitrogen-carbon interaction. The biochar with a ratio of Biochar: K 2 FeO 4 : CaCO 3 = 3:1:1 exhibited superior properties for adsorption of phenol and had a maximum adsorption capacity of 211.73 mg/g at 298 K, C 0 = 200 mg/L, pH = 6.0 and t = 480 min. These excellent adsorption properties were due to superior physicomechanical properties (a large specific surface area (610.53 m 2 /g) and pore volume (0.3950 cm 3 /g), a well-developed pore structure (hierarchical), a high graphitization degree (I D /I G = 2.02), the presence of O/N-rich functional groups and Fe-Ox,Ca-Ox, N-doping, as well as synergistic activation by K 2 FeO 4 and CaCO 3 ). The Freundlich and pseudo-second-order models effectively fit the adsorption data, indicating multilayer physicochemical adsorption. Pore filling and π-π interactions were the predominant mechanisms for phenol removal, and H-bonding interactions, Lewis-acid-base interactions, and metal complexation played an important role in enhancing phenol removal. A simple, feasible approach with application potential to organic contaminant/pollutant removal was developed in this study.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 72
·42343-42350
·
IF 3.049
Zhibing Yin,Nian Liu,Siyao Bian,Jihui Li,Shuying Xu,Yucang Zhang
Catalytic oxidative pyrolysis is a promising method for the preparation of highly adsorptive biochar by introducing oxygen-containing groups. Here, a K2FeO4-catalyzed oxidative pyrolysis was described for enhancing the adsorption capability of areca leaf biochar toward methylene blue at low temperature. It was shown that the maximum adsorption capacity of the biochar pyrolyzed at 200 °C was greatly improved from 122.67 to 251.95 mg g−1 with the catalysis of K2FeO4 due to the introduction of surface oxygen-containing groups. In addition, a high adsorption capability was observed over a wide pH range for the K2FeO4-modified biochar and nearly neutral pH was obtained after adsorption, further demonstrating the great advantages of K2FeO4-catalyzed oxidative pyrolysis. Mechanistic studies revealed that the adsorption of the pristine biochar was mainly determined by hydrogen bonding and electrostatic interaction. Whereas, the adsorption of the K2FeO4-modified biochar was attributed to cation exchange besides hydrogen bonding and electrostatic interactions.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Yi Sun,Xin Peng,Yudong Guan,Tong Su,Zezun Xie,Ziying Wu,Yongxuan Long,Huihui Zhu,Jie Shao,Xiaoli Mai,Xuzhi Shi,Tingting Wu,Zhaogang Teng,Bing Zhang,Kun Chen,Xiaoyan Xin
Photodynamic Therapy (PDT) offers a promising minimally invasive treatment for breast cancer, but its efficacy is limited by the hostile tumor microenvironment (TME), including hypoxia and high glutathione (GSH) levels. Although various strategies to improve oxygen concentration or reduce reactive oxygen species (ROS) resistance for enhanced PDT have been explored, they typically require intricate design and complex synthesis of multifunctional nanocarriers. Thus, this study introduces a facile K 2 FeO 4 -induced strategy to enhance PDT efficiency in breast cancer through the tumor in situ synthesis of Fe 2 O 3 and O 2 . Inspired by the successful application of K 2 FeO 4 in ecological remediation and hemostasis, K 2 FeO 4 reacts with GSH, biological system, H 2 O 2 , and water, to generate Fe 2 O 3 and O 2 . Intratumoral injection of K 2 FeO 4 improves the TME, followed by Ce6 administration to enhance PDT through synergistic ferroptosis. This approach boosts PDT efficacy significantly by increasing ROS generation, lipid peroxidation, and inhibiting GSH and GPX4. Proteomic analysis revealed alterations in key pathways, including endocytosis and energy metabolism. This K 2 FeO 4 -PDT strategy creates a positive feedback loop by enhancing oxidative stress, providing an interesting and promising approach to PDT.
研究领域:
癌症研究
·
药学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomass Conversion and Biorefinery
·
2025
·
IF 4.1
Sun Zhonghe,Yang Qianhui,Zhu Mingxin,Pan Shunlong,Zhou Hua
In the penicillin fermentation production industry, a large amount of waste bacterial residue is generated annually, posing significant potential risks to the environment. Currently, the most common method of disposal, incineration, wastes a considerable amount of biomass resources. This study utilizes penicillin fermentation bacterial residue as the raw material to prepare two types of high-performance magnetic biochar activated by KOH/K 2 FeO 4 (K 2 FeO 4 -BC, KOH/K 2 FeO 4 -BC) for the adsorption of ofloxacin. The results indicate that the addition of KOH effectively improves the biochar’s adsorption performance for ofloxacin. The BET specific surface areas of the two materials are 777.88 m 2 ·g −1 and 846.16 m 2 ·g −1 , respectively. The average mesopore diameter of KOH/K 2 FeO 4 -BC is 5.34 nm, and the mesopore volume accounts for over 99.5% of the total pore volume. At 298K, the saturated adsorption capacity of KOH/K 2 FeO 4 -BC for ofloxacin is 289.86 mg·g −1 . The experiment demonstrates that the adsorption behavior of ofloxacin on KOH/K 2 FeO 4 -BC is more consistent with the Freundlich model and the second-order kinetic model. KOH/K 2 FeO 4 -BC achieves rapid removal of ofloxacin, with the adsorption removal effect reaching over 95% of adsorption saturation within 30 min. Repeated use experiments show that after five cycles, KOH/K 2 FeO 4 -BC retains 56.71% of its initial adsorption performance. Graphical abstract
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
Frontiers in Chemistry
·
2022
·
IF 5.545
Li Siwen,Lin Yingzi,Wang Gaoqi,Zhu Suiyi,Liu Gen,Shi Chunyan,Chen Lei
This study researched the formation of disinfection by-products (DBPs) in sulfamethazine (SMZ) chlorination after preoxidation by K2FeO4 and O3 and the influence of preoxidation on cytotoxicity and biological toxicity. Then, the study emphatically analyzed the influencing factors such as NaClO dosage, pH value, reaction temperature, fulvic acid (FA), and bromide and iodide ions. The results showed that preoxidation by K2FeO4 effectively inhibited the formation of DBPs of haloketones (HKS) and trihalomethanes (THMs), with an average inhibition rate of over 60%. The formation of DBPs after preoxidation by O3 was higher than that by K2FeO4; preoxidation by K2FeO4 reduced the influence of NaClO dosage, temperature, and pH value on the production of DBPs after SMZ chlorination. The cytotoxicity and biological toxicity of SMZ chlorination after preoxidation were evaluated and compared by calculating the LC50 value of DBPs and the luminescent bacteria method. The results of both calculation methods showed that the toxicity of DBPs after preoxidation by K2FeO4 was lower than that by O3 preoxidation. K2FeO4 and O3 preoxidation improved the SMZ removal efficiency by 8.41 and 10.49%, respectively, and inhibited the formation of most DBPs, but the preoxidation promoted the formation of highly toxic DBPs (HANs). The toxicity of DBPs formed in SMZ chlorination after preoxidation by K2FeO4 and O3 was slightly higher than that of chlorination disinfection alone, but it was still within the safe range. This study provides more new details about the formation and toxicity changes of DBPs in the process of SMZ chlorination after preoxidation.
研究领域:
环境科学
·
毒理学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Xiaohua Li,Honglei Chen,Shanshan Shao
Solid-liquid phase change materials (PCMs) possess green and reversible thermal storage characteristics, but their application is limited by liquid leakage in the molten state and the low thermal conductivity of solid-liquid PCMs. Biochar (BC), with its inherent porous architecture and abundant surface functionalities, was synthesized through K2FeO4 activated carbonization of straw, a representative agricultural residue, demonstrating exceptional potential as a sustainable matrix material. After loading polyethylene glycol, the composite PCMs were obtained (BC/PEG). The research focused on investigating the effects of carbonization temperature and K2FeO4 on the structural properties of biochar. The results indicated that when the carbonization temperature is 800 °C and the proportion of K2FeO4 is 1:1, the specific surface area of BC reaches 1463.85 m2/g. The BC/PEG has excellent heat storage performance, with a loading rate as high as 74.8% and a melting enthalpy of 120.7 J/g. While maintaining a high loading rate, BC/PEG800-1 exhibited a thermal conductivity of 0.449 W/(m·K), representing a 38.6% enhancement over that of pure PEG. The findings suggest that biochar derived from K2FeO4 activated biomass effectively addresses PCM leakage and low thermal conductivity. This material exhibits promising potential for energy storage systems, offering a novel strategy to enhance thermal performance in PCMs.
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 10
·4087-4097
·
IF 2.8
Li Hongwei,Wang Huina,Xie Yueyang,Wang Yukun,Yan Guanghong,Wang Bin,Xue Fei
Doping with oxygen
and nitrogen in graphite felt (GF) is critical for enhancing the activity of the electrode material in vanadium redox flow batteries (VRFB). In this paper, we present a combined approach that utilizes Fe etching and nitrogen functionalization by means of K 2 FeO 4 and NH 3 to modify the surface structure of graphite fibers. The results show that the innovative approach enhances the disordered structure of the surface carbon of GF and substantially improves the oxygen and nitrogen functionalized groups. This modified GF is completely hydrophilic, and its assembled electrode energy efficiency is 80.08% at a current density of 80 mA∙cm −2 , compared with 69.87% for the pristine GF. The energy efficiency of the modified GF was maintained at 81.8% after 50 charge-discharge cycles. This can be attributed to the reduced internal resistance of these modified GF electrode as well as to the improved mass transport and charge redox exchange towards VO 2+ /VO 2 + redox couple. The combined approach of Fe etching and nitrogen functionalization significantly enhances the electrochemical activity of the GF electrode. This improves the performance of the VRFB.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2020
·
IF 2.213
Liang Xu,Fenglian Fu,Peijing Yu,Guangzhao Sun
To efficiently treat hexavalent chromium (Cr(VI)) wastewater, K2FeO4 was used to remove and reduce Cr(VI) in presence of Mn(II) in this paper. Batch removal experiments were carried out to study the effect of Fe/Mn molar ratios, initial pH, in-situ and ex-situ and co-existing ions on Cr(VI) removal. The results showed the removal efficiency of Cr(VI) was 97.7% for the initial Cr(VI) concentration of 10.0 mg/L at Fe/Mn molar ratio of 2:3 and initial pH 8.0. Meanwhile, the high removal efficiency of Cr(VI) had been maintained throughout the pH range of 3.0–8.0 in the experimental study. Moreover, the removal process was relatively stable regardless of in-situ and ex-situ, and co-existing ions such as Ca2+ and low concentration of HCO3− had no intense effect on Cr(VI) removal, while SO42− inhibited Cr(VI) removal in the reaction system. To investigate the removal mechanism of Cr(VI) by K2FeO4 in presence of Mn(II), the reaction products were characterized by the Fourier transformed infrared spectrometer, X-ray powder diffraction, Transmission electron microscopy and the high-resolution X-ray photoelectron spectroscopy. The results indicated the ferrate decomposition products of γ-FeOOH/γ-Fe2O3 had the ability to adsorb Cr(VI) and react with Mn(II) to form γ-Fe2O3-Mn(II) complex to adsorb and reduce Cr(VI).
研究领域:
环境化学
·
水处理技术
·
无机化学
·
污染物修复
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 52
·期 1
·402-413
·
IF 2.047
Liu Xinru,Yang Jianwei,Bian Zhentao,Zhao Xuanxuan,Zhu Yanyan,Wang Hongyan,Song Lei,Chu Juncai,Zhang Ying,Ye Ziyan
Biomass waste carbon sources enjoy a place of pride because of their low-cost, environmentally friendly, and readily available nature. The development of an efficient approach to transform biomass wastes into functional carbon-based electrode materials is a hot topic. However, the production process of biologically-based activated carbon needs to be further improved. Here, discarded badminton shuttlecock feathers were used as precursor via activation with potassium ferrate (K 2 FeO 4 ) to prepare hierarchical porous carbon. The obtained carbon material with hierarchical pore structure displays a high specific surface area ( S BET ) of 1279.5 m 2 g −1 , large total pore volume ( V total ) of 0.73 cm 3 g −1 ,and high-level hetero-atom doping (N: 3.78 at.%, O: 7.5 at.%, S: 3.85 at.%). Experimental results reveal that the as-prepared FPCB-750–1:3 exhibits an excellent specific capacitance ( C g ) of up to 449 F g −1 at the current density of 0.1 A g −1 . Moreover, even at 10 A g −1 , the FPCB-750–1:3 electrode still presents a high capacitance of 216 F g −1 . In addition, the energy density (ED) of the FPCB-750–1:3//FPCB-750–1:3 symmetric cell reaches 56 Wh kg −1 at a power density (PD) of 720 W kg −1 in an aqueous electrolyte (1 M Na 2 SO 4 ), meanwhile maintaining a high-class long-term electrochemical stability (fading lower than 4% after 10,000 cycles of charging and discharging). This study provides a trustworthy method to produce promising electrode materials from waste biomass for high-performance supercapacitors.
Graphical Abstract
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 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）