MOLECULES
·
2024
·Vol. 29
·期 10
·2349
·
IF 4.2
Ziwei Deng,Wei Liu,Junyuan Zhang,Shuli Bai,Changyu Liu,Mengchen Zhang,Chao Peng,Xiaolong Xu,Jianbo Jia
A Fe-Co dual-metal co-doped N containing the carbon composite (FeCo-HNC) was prepared by adjusting the ratio of iron to cobalt as well as the pyrolysis temperature with the assistance of functionalized silica template. Fe1Co-HNC, which was formed with 1D carbon nanotubes and 2D carbon nanosheets including a rich mesoporous structure, exhibited outstanding oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalytic activities. The ORR half-wave potential is 0.86 V (vs. reversible hydrogen electrode, RHE), and the OER overpotential is 0.76 V at 10 mA cm−2with the Fe1Co-HNC catalyst. It also displayed superior performance in zinc–air batteries. This method provides a promising strategy for the fabrication of efficient transition metal-based carbon catalysts.
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Sustainable Materials and Technologies
·
2024
·
IF 8.6
Jin Qi,Tong Zhang,Ran Zhang,Jinrong Liu,Mingrui Zong,Qingmei Zhang,Yilin Ping,Yajuan Gong,Binbin Zhang,Xiaoming Liu,Jiadi Li,Xiuping Wu,Bing Li
Bacterial infections pose a serious worldwide public health concern and play an important role in slowing or dramatically delaying wound healing. However, traditional antibiotics are faced with obstacles such as bacterial resistance and unsatisfactory biocompatibility, which has impeded further clinical translation. In recent years, antimicrobial nanomaterials have emerged as viable alternatives for combating bacterial infections, and carbon dots (CDs) have received particularly widespread attention due to their superior characteristics. In this work, a simple and eco-friendly one-step hydrothermal method was employed using the natural herbal medicine Eucommia ulmoides as a biomass carbon source to synthesize an Fe-doped CDs nanozyme (Fe-CDs) with good peroxidase-like (POD-like) activity, high biocompatibility, and strong antimicrobial activity for safe and effective antimicrobial therapy and the promotion of wound healing. L929 cells co-cultured with Fe-CDs did not show significant cytotoxicity and favored cell proliferation at appropriate concentrations. In addition, Fe-CDs catalyzed the decomposition of low-concentration H 2 O 2 to ·OH, leading to enhanced antimicrobial activity. Both in vitro and in vivo experiments demonstrated that Fe-CDs exhibit potent antibacterial properties, the ability to promote cell migration and angiogenesis, and significant potential for promoting the healing of infected wounds. In summary, a green and safe antimicrobial nanozyme based on a biomass herbal medicine was developed in this work, offering promising insight into the development of novel antimicrobial materials and tissue regeneration engineering.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Usman Farooq,Xudong Hu,Jingyi Shang,Shuang Li,Jun Long,Lin Wang,Xinhai Wang
The increasing presence of pharmaceutical contaminants, such as dipyrone (DIP), in water systems highlights the urgent need for innovative and sustainable remediation technologies. This study examined the degradation of DIP using a chalcopyrite (CP)-activated peracetic acid (PAA) system, highlighting its potential for the removal of pharmaceutical pollutants. Experimental and statistical parameter optimization suggested that approximately 85.5 % of DIP degradation and 60 % of mineralization were achieved with CP (4 g/L) and PAA (10 mM) at neutral pH. Scavenger and probe experiments confirmed the presence of hydroxyl radicals ( • OH) and alkyl radical species in the CP/PAA system, but •OH was the primary contributor to DIP degradation. The surface-active sites confirmed that heterogeneous Cu(I) exerted more significant influence than Fe (II) of CP, producing 4.21 and 2.35 mg/L, respectively. The presence of reductive sulfur species in the CP allowed the capture of additional protons, creating sulfur vacancies and further strengthening the cycling of Cu and Fe species. DFT analysis confirmed that the FeCuS 2 -Fe adsorption energy (−3.71 eV) and the HOMO-LUMO gap of FeCuS 2 -Fe (0.03 eV) were critical to produce radicals. The CP/PAA system is suitable for DIP degradation and contributes significantly to the degradation of other environmental pollutants. It retained its capacity to degrade above 65 % for up to five consecutive cycles, offering a new and innovative method for water treatment.
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Journal of Energy Storage
·
2025
·
IF 9.8
Xiaoyan Zhou,Liqin Li,Huanxiu Zou,Huichuan Tang,Aojie Li,Enxiang Liang,Hong Yin,Liang Chen,Zhaohui Hou,Wei Wang
Transition metal sulfides have shown promise for high lithium storage capacities, but their conductivity and volume effects have limited their potential as anodes for lithium-ion batteries (LIBs). This study focused on structural design and developed Fe-doped Ni 3 S 2 nanocrystals embedded in porous carbon composites with a unique root-whisker-like structure. The porous and root-whisker morphology accelerated ion diffusion rates and reduced charge-transfer resistance, improving electrochemical reaction kinetics. The material exhibits a high capacitance-controlled capacity contribution of up to 90.19 %. Additionally, Distribution of Relaxation Times analysis confirms a faster electrochemical response. The strategy proposed in this work provides valuable guidance for designing carbon-based composite anodes for LIBs.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhu Xiong,Yuhang Cheng,Kaige Dong,Mahmud Sakil,Zhu Wang,Liguo Zhang,Tangfu Xiao,Gaosheng Zhang,Shuaifei Zhao
Super trace thallium(I) (Tl + ) is still highly toxic and its removal from surface water is challenging. Here, we developed a new adsorptive membrane by immobilizing bimetal (cobalt and iron) Prussian blue analogues (Co@Fe-PBAs) on a polytetrafluoroethylene microporous membrane (Co@Fe-PBAs-M). The prepared membrane displayed precise adsorption of trace Tl + (50 μg/L) from complex water. A variety of interfering factors, such as water pH, competitive adsorption of positive ions (Na + and K + ) and negative ions (CO 3 2– and PO 4 3- ), natural organic matters (e.g., fulvic acid and bovine serum albumin) were evaluated during Tl removal. The composite membrane showed high removal efficiency (over 80 %) during long-term dynamic membrane separation of surface water containing super trace Tl + (<2.0 μg/L), breaking through the adsorption limitation in ultralow concentration of Tl + . The unique bimetal electron transfer of Co@Fe-PBAs-M reinforced the adsorptive performance to Tl + through dual ion exchange and intercalation. In the treatment of real Pearl River water containing 0.5 μg/L of Tl + , our membrane effectively reduced the Tl + concentration to 0.04 μg/L during 6-h continuous separation, which was far below the required level for drinking water (i.e., 0.1 μg/L). This work offers a promising solution for safe drinking water by remedying ultralow Tl + contaminated surface water.
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Agronomy-Basel
·
2024
·Vol. 14
·期 3
·461
·
IF 3.3
Zhanpeng Liu,Junjian Lin,Zhimin Xu,Fangfang Li,Siyao Wang,Peng Gao,Guomei Xiong,Hongbo Peng
Pesticides are widely detected in large quantities in the environment, posing an ecological threat to the human body and ecology. Semiconductor nanomaterials such as nano-titania (nTiO2) have strong photocatalytic degradation efficiency for pollutants. However, the wide bandgap and limited light absorption range inhibit nano-titania’s practical application. Therefore, nTiO2was modified by Fe3+doping using the microwave hydrothermal method to improve its photocatalytic performance in this study. Fe-nTiO2doped with a 1.0% mass ratio was used due to its high photocatalytic performance. Its maximum degradation efficiencies for ACE and ATZ under a 20 W xenon lamp were 88% and 88.5%, respectively. It was found that Fe3+doping modification distorted the spatial morphology of nTiO2and shortened the bandgap to facilitate the photocatalytic reaction. The electron paramagnetic resonance results showed that the reactive radicals (1O2, ·OH) produced by photogenerated electrons (e−) and holes (h+) of Fe-nTiO2were the main active species in the degradation of ACE and ATZ. Additionally, the application of Fe-nTiO2significantly enhanced the growth of lettuce under sunlight; the degradation efficiencies of ACE and ATZ in lettuce were 98.5% and 100%, respectively. This work provides new insights into the removal of organic contaminants by photocatalysts under sunlight in agriculture.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Enhao Zhang,Sisi Yao,Xiaoxuan Guo,Xinyi Zhou,Yutai Li,Feifan Xie,Yonghang Wei,Dongjiang Yang,Jin Sun,Yun Lu
The advancement of highly efficient bifunctional electrodes tailored for water electrolysis, specifically targeting the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), is pivotal for sustainable hydrogen production. However, sluggish reaction kinetics and elevated overpotentials pose formidable hurdles. In this study, an innovative strategy is introduced by integrating Fe@ZIF-67 onto self-supporting carbonized rattan stem (CR), leveraging its distinctive through-channel macroporous architecture to bolster catalytic efficacy. The self-supporting CR substrate not only enhances mass transport but also facilitates uniform deposition of ZIF-67, ensuring optimal exposure of active sites. A comparative analysis with carbonized basswood (CW) underscores the superior performance of the macroporous CR substrate in augmenting both OER and HER activities. Notably, the Fe@ZIF-CR self-supported electrode achieves an overpotential of 208 mV at 10 mA cm⁻² for oxygen evolution and 317 mV at 100 mA cm⁻² for hydrogen evolution. Additionally, the self-supporting nature of the CR substrate guarantees long-term stability and mitigates catalyst loss during operation. These findings underscore the synergistic advantages of the macroporous structure and ZIF-67 active sites, offering fresh perspectives on the utilization of biomass-derived carbon materials in sustainable energy technologies.
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RSC Advances
·
2024
·Vol. 14
·期 33
·24055-24065
·
IF 3.9
Xiuzhen Wei,Zelong Chen,Mengjia He,Liangliang Xu,Yue Li,Jia Yang,Xuekang Zhang,Xianghao Zhang,Ze Wang,Shiyu Cao,Qinghua Zhou,Bingjun Pan
Mg–Fe layered hydroxide (LDH) was synthesized by the double titration method and added to trimesoyl chloride (TMC) to prepare an Mg–Fe LDH-modified polyamide nanofiltration (NF) membrane by interfacial polymerization (IP). Compared to the pure polyamide NF membrane, the Mg–Fe LDH-modified membrane presented a wrinkled structure and a comparatively smooth surface. Additionally, the permeation flux and rejection rate of the modified NF membrane for 1000 mg L−1 Na2SO4 solution were 61.7 L m−2 h−1 and 95.9%, respectively. When the Mg–Fe LDH modified NF membrane was used to separate dye/NaCl mixed solutions, the rejection of NaCl was less than 17% and the rejection rate of Coomassie Brilliant Blue (CBB) molecules was close to 100%. At the same time, the concentration of CBB increased from 500 mg L−1 to 1151 mg L−1 which means that the LDH modified NF membrane could separate CBB/NaCl effectively and could concentrate CBB at the same time.
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LANGMUIR
·
2024
·
IF 3.7
Ke Zhang,Yafeng Bai,Liying Wang,Yang Gao,Xuesong Li,Xijia Yang,Wei Lü
Zinc-ion hybrid capacitors (ZIHCs) are expected to become the next generation of energy storage devices, highly anticipated for their battery-like performance and lower cost. However, because of their unmanageable structural deformation and inadequate cycling capabilities, they face significant difficulties and challenges in practical production and applications. In this paper, we developed and assembled a flexible solid-state zinc ion hybrid capacitor, which utilizes a gel electrolyte, activated carbon (AC) as the anode, and porous Fe3+ doped MnO2 (Fe-MnO2) as the cathode. The embedding of Fe3+ in MnO2 broadens the original ion channels and provides more electrochemically active sites. The gel electrolyte is formed with poly(vinyl alcohol) (PVA) providing a flexible framework, carboxymethylcellulose (CMC) offering rigid support, and enhanced low-temperature performance due to the addition of ethylene glycol (EG). This combination results in excellent mechanical properties and high ionic conductivity, ensuring stability even under low-temperature conditions. As a result, the flexible ZIHC showcases exceptional specific capacitance, achieving a capacitance of 848.8 mF cm–2 at a current density of 2 mA cm–2, and strong stability when subjected to bending tests. Notably, even under low-temperature conditions of −20 °C, the device maintains consistent electrochemical performance, with a remarkable cycle retention rate of 93.75% after 15 000 cycles. This study demonstrates significant advancements in energy storage systems, creating opportunities for the use of flexible devices across a range of applications.
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PLoS One
·
2024
·Vol. 19
·期 10
·e0311239
·
IF 2.9
Zhijia Miao,Xueqiang Song,Xiaolei Wang,Hao Wang,Shuoyang Li,Zhen Jiao
To remove phosphate from water, a novel Fe-doped ZIF-8 was synthesized as a superior adsorbent. The Fe-doped ZIF-8 was fully characterized using different characterization techniques and it was found that the as-prepared Fe-doped ZIF-8 (denoted as ZIF-(2Zn:1Fe)) showed a polyhedral morphology with a large specific surface area of 157.64 m 2 /g and an average pore size of 3.055 nm. Analyses using Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction showed that Fe atoms were successfully incorporated into the ZIF-8 skeleton. Batch experiments demonstrated that the molar ratio of Fe and Zn has effects on phosphate adsorption. The adsorption kinetics conformed to a pseudo-second-order model with a high correlation coefficient ( R 2 = 0.9983). The adsorption isotherm matched the Langmuir model ( R 2 = 0.9994) better than the Freundlich model ( R 2 = 0.7501), suggesting that the adsorption of phosphoric acid by ZIF-(2Zn:1Fe) can be classified as a chemisorption on a homogeneous surface. The adsorption amount was 38.60 mg/g. It was found that acidic environments favored the adsorption reaction and the best adsorption was achieved at an initial pH of 2. Inhibition of adsorption by common anions is NO 3 - > CO 3 2- > SO 4 2- > Cl - . Characterization results indicate that the main mechanism of adsorption is surface complexation interactions.
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ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Min Zhu,Zongqiang Sheng,Zhifen Fu,Yang Li,Juan Gao,Chao Zhang
Exploring cost-effective non-noble metal-based catalysts with high activity and stability is of great significance for energy conversion and storage involving oxygen evolution reaction (OER). Here, we employed a laser irradiation technique to synthesis Fe doped CoO nanoparticles with ultrafine size (≈ 5.4 nm) and abundant oxygen vacancies (Fe-O v -CoO). The ultrafine size of Fe-O v -CoO nanoparticles provides more active sites to be exposed. Fe doping and oxygen vacancy promote the intrinsic activity and electron transfer rates of Fe-O v -CoO, giving rise to high activity and stability catalyst for OER. Fe-O v -CoO delivers a large current density of 1000 mA cm −2 at an overpotential of 548 mV, which is much better than commercial RuO 2 . Moreover, Fe-O v -CoO presents a remarkable long-term stability with negligible degeneration at a high current density of 500 mA cm −2 for 120 h. This work provides a new route to develop OER electrocatalyst with high activity and stability.
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Biomedical Physics & Engineering Express
·
2024
·Vol. 10
·期 4
·045004
·
IF 1.3
Mingjia Feng,Yan Li,Yanfang Sun,Tianqi Liu,Khaydar E Yunusov,Guohua Jiang
The transdermal drug delivery based on microneedles (MNs) provides a suitable and painless self-administration for diabetic patients. In this work, the hydrogel-forming MNs were firstly fabricated using poly(vinyl alcohol) (PVA) and chitosan (CS) as matrix. A hypoglycemic drug, metformin (Met), had been loaded into MIL-100(Fe). Then, both of free Met and Met-loaded MIL-100(Fe) were integrated into hydrogel-forming MNs for regulation of blood glucose levels (BGLs) on diabetic rats. After penetrated into the skin, the free Met could be firstly released from MNs. Due to the absorption of interstitial fluid and subsequent release of loaded Met from MIL-100(Fe), leading to a sustainable and long-term drug release behaviors. A notable hypoglycemic effect and low risk of hypoglycemia could be obtained on diabetic rat models in vivo. The as-fabricated hydrogel-forming MNs expected to become a new type of transdermal drug delivery platform for transdermal delivery of high-dose drugs to form a long-term hypoglycemic effect.
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