ChemCatChem
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2017
·Vol. 9
·期 9
·1708-1715
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IF 4.803
Jingtian Gao,Yun Wang,Shijian Zhou,Wei Lin,Yan Kong
Graphical Visibly better : A facile one-step pyrolysis process was developed to synthesize iron-doped graphitic carbon nitride nanosheets. The sample with 0.5 wt % FeCl 3 exhibited the best photocatalytic performance in the degradation of Methylene Blue and water splitting under visible light irradiation. A simple one-step pyrolysis process (compared with the routine method of liquid exfoliation and impregnation) was designed to synthesize Fe-doped graphitic carbon nitride (g-C 3 N 4 ) nanosheets with NH 4 Cl as dynamic gas template and FeCl 3 as the Fe source. Results of XPS and DRS indicated that the Fe species might exist at the state of Fe 3+ and form Fe−N bonds with N atoms, thereby expanding visible light absorption regions and reducing the band gap of g-C 3 N 4 nanosheets. Doping certain amounts of Fe could promote the exfoliation and further increase the specific surface area, while excessive Fe might break the sheet structure. The specific surface area of the optimized Fe-doped g-C 3 N 4 nanosheets reached 236.52 m 2 g −1 , which was 2.5 times higher than that of g-C 3 N 4 nanosheets. Among various photocatalysts prepared, the sample (0.5 wt % FeCl 3 ) exhibited maximum photocatalytic performance in degradation of Methylene Blue and water splitting under visible light irradiation. The degradation rate of MB was about 1.4 and 1.7 times higher than that of pure g-C 3 N 4 nanosheets and bulk g-C 3 N 4 , respectively. The H 2 production rate was 536 μmol h −1 g −1 , which was 1.8 and 6 times higher than that of pure g-C 3 N 4 nanosheets and bulk g-C 3 N 4 , separately.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
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IF 8.328
Jianqing Ma,Qunfeng Yang,Yuezhong Wen,Weiping Liu
Heterogeneous Fe-N complexes are a kind of promising catalysts for the Fenton-like reaction. The present study selected a stable and inexpensive g-C 3 N 4 as the chelating agent and combined with the graphitized mesoporous carbon (GMC). The fabricated Fe-g-C 3 N 4 /GMC composite was characterized by several techniques including FTIR, XRD, XPS, TEM and STXM. Results showed clear sheets of g-C 3 N 4 and graphite with Fe evenly distributed mostly in the Fe-N coordination form. The catalyst expressed high activity in the Fenton-like reaction in a wide pH range of 4–10. 99.2% removal of Acid Red 73 was obtained in 40 min, and the degradation data well fitted with the pseudo-first-order kinetics model. By correlating the constant of reaction rates calculated from the model and the Fe speciation contents of the samples prepared at different conditions, we deduced that Fe-N species are the most important active sites for the Fenton-like reaction. More importantly, hydroxyl radicals played a great role in the whole reaction yet their generation was independent of visible light. Cyclic voltammetry results confirmed that the GMC can accelerate the Fe(III)/Fe(II) redox cycle by enhancing electron transfer, and thus enable this Fenton-like catalyst to perform well in a wide pH range.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Qinrui Fu,Yuan Meng,Zilin Fang,Quanqin Hu,Liang Xu,Wenhua Gao,Xiaochun Huang,Qiao Xue,Ya-Ping Sun,Fushen Lu
Boron nitride nanosheets (BNNS) were used to anchor bimetallic Pd–Fe nanoparticles for Suzuki–Miyaura coupling catalysts. The bimetallic nanoparticles were found to be core–shell in structure, and their formation was likely facilitated by their interactions with the BNNS. The Pd–Fe/BNNS catalysts were highly effective in representative Suzuki–Miyaura reactions, with performances matching or exceeding those of the state-of-the-art methods. Specifically, the superior catalytic activities were characterized by generally shortened reaction times, minimal Pd usage, excellent reusability of the catalysts and high or nearly quantitative conversion yields in a benign solvent system without the need for any special conditions, such as ligands and surfactants or inert gas protection. The obvious advantages of the Pd–Fe/BNNS over similar catalysts based on other supports, such as reduced graphene oxide (rGO), suggest that BNNS may be developed into a versatile platform for many other important catalytic reactions.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xuefei Chen,Xiedan Ren,Yi Wang,Jie Meng,Qing Huang,Jing Shen
Persistent infections caused by bacterial contamination and excess exudate often delay wound healing. To address this challenge, we have developed a multifunctional antibacterial Janus nanofibrous membrane with unidirectional fluid transport, pH-triggered drug release, and photothermal effect as a potential candidate for the infected wounds using electrospinning technology. This Janus membrane comprises a dual-layer structure: a hydrophilic poly(ε-caprolactone)/tannic acid-ferric ion (PCL/TA-Fe3+) nanofiber layer that provides pH-responsive drug release and photothermal antibacterial activity, and a hydrophobic PCL nanofiber layer for effective unidirectional fluid transport. The dual-gradient Janus structure, designed with hierarchical pore sizes and hydrophilic performance, facilitates rapid water transport. Meanwhile, due to the introduction of TA-Fe3+ complexes in situ, the Janus membrane demonstrates the capacity for controlled release of TA based on the pH level along with excellent photothermal properties. The synergistic action of TA-controlled release and photothermal effect endows the Janus membrane with nearly 100% bacterial eradication against Staphylococcus aureus and Escherichia coli as well as the eradication ability of the biofilm. Furthermore, the Janus membrane exhibits acceptable water absorption, moisture permeability, mechanical strength, and biocompatibility, indicating its potential as an optimal candidate for treating infected wounds.
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JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Jiangxin Wang,Xiutao Liu,Chunkun Lin,Kaixin Zhang,Kuanhong Mei,Youhao Yang,Huibin Shi,Zizhu Wang,Yu Zhang,Shuo Li
The integrated design of solar energy conversion and storage systems has attracted increasing attention, and non-spontaneous redox reactions driven by dual photoelectrodes provide a potential solution to this issue. This study presents a solar rechargeable flow battery (SRFB) that combines dual photoelectrodes (BiVO 4 or Mo–BiVO 4 as photoanode, polyterthiophene (pTTh) as photocathode) with cost-effective redox pairs (Fe 3+ /Fe 2+ and Br 3 − /Br − ). The system charges under simulated solar illumination (100 mW∙cm −2 , AM 1.5G) and releases stored energy controllably as electrical energy. Research indicates the Mo–BiVO 4 photoanode and pTTh photocathode achieve an open-circuit voltage of 0.34 V and a short-circuit current density of 0.38 mA cm −2 . Using a specially designed Fe 3+ /Fe 2+ -Br 3 − /Br − (Fe–Br) SRFB device made via 3D printing, a charging photocurrent of approximately 1.9 mA cm −2 is attained. In constant current discharge tests, an initial discharge voltage of 0.23 V is observed at 0.1 mA∙cm −2 within the 10 discharge cycles, demonstrating system stability and offering a viable solution for low-cost, large-scale solar energy storage and conversion.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Zezhuang Cao,Jinlan Xu,Wanchun Tan,Huan Tang,Huan Li,Yikai Li
Sulfate radical advanced technologies (SR-AOPs) has been increasingly applied for chemical oxidation of toxic wastewater treatment, while the sluggish kinetics of Fe(III)/Fe(II) cycling remains a serious problem in its application. In this study, a novel co-catalyst of humic acid-Fe incorporated biochar (HA-Fe@BC) was successfully synthesized that can greatly accelerate the Fe(II) regeneration. More than 95 % organic pollutants could be degraded in HA-Fe@BC/peroxydisulfate (PDS) system, especially for the model pollutant Rhodamine B (an almost 8.0-fold kinetic increase). More excitingly, the superior catalytic activity of HA-Fe@BC for PDS activation may be attributed to the ample surface C-OH and C=O groups, accelerated electron transfer and formed surface HA-Fe@BC-PDS* complex with efficient oxidation activity. Radical capture, quenching experiments and electrochemical analysis confirmed that the HA-Fe@BC/PDS was caused by radicals (SO 4 •- + O 2 •- +•OH = 68.13 %) and non-radical (surface-mediated electron transfer and 1 O 2 = 26.33 %) pathways. Besides, it also exhibited anti-interference performance against anions and organic matter (eg. Cl - , Br - , NO 3 – , and PO 4 3- ). Furthermore, the degradation pathways were proposed by LC-MS assisted with density functional theory (DFT) calculations, and the mechanism was proposed comprehensively. This work demonstrates the PDS activation by HA-Fe@BC through free radical and non-free radical pathways, which provides insight into application of biochar-based materials for wastewater treatment.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Hongbin Chen,Zhongye Yu,Weikun Sun,Tao Li,Jian Zhang,Zumin Qiu,Mohammad Younas
In this work, 2LDH-CoFe 2 O 4 @BHC catalyst was prepared by modifying magnetic corncob-based hydrochar (CoFe 2 O 4 @BHC) with Co/Fe layered double hydroxide (Co/Fe-LDH), which was used to activate peroxymonosulfate (PMS) for tetracycline (TC) degradation. 2LDH-CoFe 2 O 4 @BHC demonstrated effective activation of PMS and rapid removal of TC (100 %) within 10 min by leveraging structural modulation and synergistic interactions among multiple components. In contrast, BHC (26.02 %), CoFe 2 O 4 (59.25 %), and CoFe 2 O 4 @BHC (61.88 %) presented poor removal efficiency. Furthermore, it was shown that both the free radicals (SO 4 •- ) and non-free radicals ( 1 O 2 ) were essential in the degradation process, and the catalytic mechanism was revealed to be a synergistic process with the characterization results from in-situ Raman, electrochemical characterization, and X-ray photoelectron spectroscopy (XPS). The catalytic performance of 2LDH-CoFe 2 O 4 @BHC was also evaluated using a self-developed fixed-bed reactor, demonstrating its strong stability and resistance to interference during long-term operation. The potential degradation pathway of TC in the 2LDH-CoFe 2 O 4 @BHC + PMS system was suggested based on the quadrupole time-of-flight mass spectrometry (QTOF/MS) findings. It was found that the toxicity of the intermediates produced by TC degradation significantly reduced. This study presented an insight for the decomposition of organic pollutants by synthetic biochar-loaded catalysts.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
·
IF 3.9
Bolun Yu,Jun Chen,Quanzhang Liu,Shuoyang Li,Xiaohang Zhang,Bowen Liang,Zuhong Lin,Haipu Li,Jingjing Yao
The use of metal–organic framework-derived materials for removing micropollutants from water is increasing, but precise composition control remains a challenge. In this study, 14 MIL-100(Fe)-derived materials were synthesized to adsorb and remove antipyrine (ANT) from water by optimizing the heating rate, pyrolysis temperature, and activation methods. The adsorbents demonstrated excellent ANT removal performance across a pH range of 3 to 11, as well as in complex water bodies. They also exhibited easy recovery and outstanding regeneration capabilities. Under the optimized conditions (i.e., ANT content: 10 mg/L, M-600–2 dosage: 0.1 g/L, and pH: 7), M-600-10 displayed the highest adsorption capacity (23.10 mg/g for ANT) while MIL-100(Fe) had limited adsorption capability (2.56 mg/g for ANT). The adsorption process was exothermic and spontaneous, influenced by both membrane diffusion and intraparticle diffusion, and followed the Freundlich and pseudo-second-order models. Despite variations in surface areas (75.70–261.91 m2/g), total pore volumes (0.2019–0.5984 cm3/g), and average pore sizes (7.47–13.99 nm), there was no strong linear relationship with adsorption capacity (7.47–15.99 mg/g). The major components, including Fe/pyrrolic N-doped graphene (PING), Fe3C/PING, Fe3O4/PING, and PING, had calculated adsorption energies of −0.94, −2.16, −0.79, and −2.24 eV, respectively, which correlated positively with Bader charge transfer numbers. The adsorbents relied on van der Waals forces for ANT adsorption, with PING exhibiting the strongest interactions and Fe3O4/PING exhibiting the weakest. These findings enhance the theoretical understanding of derived materials and expand their application in water purification.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-23
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IF 10.6
Li Haiqiu,Dou Yichen,Yang Hang,Xing Hanlin,Zhu Cheng,Wang Tao,Xuan Zhaopeng,Yang Mingxi
Background Despite the higher sensitivity of melanoma towards ferroptosis and photodynamic therapy (PDT), the lack of efficient ferroptosis inducers and the poor solubility of photosensitizers restrict their synergistic strategies. With unique advantages, carbon dots (CDs) are expected to serve as innovative building blocks for combination therapy of cancers. Results Herein, an ferroptosis/PDT integrated nanoplatform for melanoma therapy is constructed based on chlorin e6-modified Fe ions-doped carbon dots (Fe-CDs@Ce6). As a novel type of iron-carbon hybrid nanoparticles, the as-prepared Fe-CDs can selectively activate ferroptosis, prevent angiogenesis and inhibit the migration of mouse skin melanoma cells (B16), but have no toxicity to normal cells. The nano-conjugated structures facilitate not only the aqueous dispersibility of Ce6, but also the self-accumulation ability of Fe-CDs@Ce6 within melanoma area without requiring extra targets. Moreover, the therapeutic effects of Fe-CDs@Ce6 are synergistically enhanced due to the increased GSH depletion by PDT and the elevated singlet oxygen ( 1 O 2 ) production efficiency by Fe-CDs. When combined with laser irradiation, the tumor growth can be significantly suppressed by Fe-CDs@Ce6 through cyclic administration. The T 2 -weighted magnetic resonance imaging (MRI) capability of Fe-CDs@Ce6 also reveals their potentials for cancer diagnosis and navigation therapy. Conclusions Our findings indicate the multifunctionality of Fe-CDs@Ce6 in effectively combining ferroptosis/PDT therapy, tumor targeting and MRI imaging, which enables Fe-CDs@Ce6 to become promising biocompatible nanoplatform for the treatment of melanoma. Graphic Abstract
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2017
·
IF 6.198
Xiaolin Zhang,Mengfei Wu,Hao Dong,Hongchao Li,Bingcai Pan
Water decontamination from As(III) is an urgent but still challenging task. Herein, we fabricated a bifunctional nanocomposite HFO@PS-Cl for highly efficient removal of As(III), with active chlorine covalently binding spherical polystyrene host for in situ oxidation of As(III) to As(V), and Fe(III) hydroxide (HFO) nanoparticles (NPs) embedded inside for specific As(V) removal. HFO@PS-Cl could work effectively in a wide pH range (5–9), and other substances like sulfate, chloride, bicarbonate, silicate, and humic acid exert insignificant effect on As(III) removal. As(III) sequestration is realized via two pathways, that is, oxidation to As(V) by the active chlorine followed by specific As(V) adsorption onto HFO NPs, and As(III) adsorption onto HFO NPs followed by oxidation to As(V). The exhausted HFO@PS-Cl could be refreshed for cyclic runs with insignificant capacity loss by the combined regeneration strategy, that is, alkaline solution to rinse the adsorbed As(V) and NaClO solution to renew the host oxidation capability. In addition, fixed-bed experiments demonstrated that the HFO@PS-Cl column could generate >1760 bed volume (BV) effluent from a synthetic As(III)-containing groundwater to meet the drinking water standard (<10 μg As/L), whereas other two HFO nanocomposites, HFO@PS-N and HFO@D201 could only generate 450 and 600 BV effluents under otherwise identical conditions.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qisheng Huang,Shaojian Xie,Lei Sheng,Lei Huang,Jia Yan,Zhenxin Chen,Meng Li,Hongguo Zhang
Fluoride pollution is becoming increasingly serious with industrial growth. Controlling fluoride pollution have become important environmental issues of global concern. Transition metal nitrides are excellent CDI electrode materials due to their excellent conductivity and electrochemical stability. In this study, FeN x /C was synthesized as an electrode material for using the capacitive deionization (CDI) technique to achieve the effective removal of fluoride ions from wastewater. Its high specific surface area (463.278 mg/g) and high capacitance (44.29 F/g) were demonstrated and it had a high adsorption capacity of 158.33 mg/g. FeN 3 and FeN 4 were used as the main sites as capacitive deionization for removing fluoride from the water by chemisorption and hydrogen bonding. The higher adsorption energy by density functional calculation also indicated that the existence of Fe-N coordination bond effectively improved its electrosorption capacity. This study is beneficial to provide references and research ideas for removing fluoride in the CDI field.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Yiqing Wu,Xiangmei Ma,Bin Wang,Yanan Li,Shengtao Gao
The detrimental effects of ultraviolet (UV) and electromagnetic (EM) radiation on human health and physiological functions are well documented. The development of efficient shielding materials to mitigate these effects is therefore an urgent necessity. In this study, Zn/Ti-LDH@Ce/Fe-MOF@PPy composites were successfully prepared by hydrothermal synthesis and interfacial polymerisation. The properties of the composites were compared and analysed with those of pure Zn/Ti-LDH and Ce/Fe-MOF, and the results show that the prepared materials have excellent comprehensive properties, with a broad EAB of 5.2 GHz and a RL min of −46.2 dB at 14.8 GHz at the thickness of 3 mm, while exhibiting excellent UV shielding capability.The present study offers novel concepts and efficacious methodologies for the engineering of high-performance microwave absorbing and UV shielding materials.
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