APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ziqi Cao,Di Sun,Hai Hu,Wenxin Li,Ziying Xiong,Maofen He,Shuqi Cai,Yan Fan,Lulu Zheng,Shifei Kang
The exclusive Fenton activity of iron ions has initiated wide investigation into tumor microenvironment-activated tumor therapy owing to the production of toxic ·OH and extra oxygen for chemodynamic therapy (CDT) and photodynamic therapy (PDT) respectively. However, the sensitivity of the labile iron pool (LIP) is unsatisfactory even when iron ions are placed in the tumor microenvironment. Herein, we constructed ferrous oxalate (FeC 2 O 4 ) self-assembled nanorods loaded with a graphitic carbon nitride (g-C 3 N 4 ) photo-Fenton catalyst, which can catalyze H 2 O 2 to continuously generate abundant ·OH under visible light irradiation. The FeC 2 O 4 self-assembled nanorods also dramatically accelerated O 2 production (catalase activity) to improve the PDT of C 3 N 4 . Furthermore, the photo-Fenton catalyst under excitation also open ion channels and release free iron to increase LIP to exploit the joint CDT and PDT. Characterizations proved the self-assembled nanorods outperformed conventional Fenton catalysts in terms of stability, photoelectric response performance and photo-Fenton catalytic ability, which can be ascribed to the optimized band structure and charge isolating capability. Remarkably, the self-assembled nanorods coated with g-C 3 N 4 also showed excellent biocompatibility during the fluorescence tracing cell phagocytosis experiment, suggesting great in-vivo application potential. The results of enhanced generation of reactive oxygen species, reduction of glutathione, consumption of lipid peroxidation, and reduced cell viability verified the typical ferroptosis mechanism of the FeC 2 O 4 /g-C 3 N 4 self-assemble system as-developed. These results demonstrate the great potential of the biocompatible self-assembly photo-Fenton system for rational control of tumor behaviors.
研究领域:
生物医学工程
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肿瘤学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Na Chen,Ying Zhao,Meiqi Li,Xiaobing Wang,Xing Peng,Hongwei Sun,Lizhi Zhang
Safe treatment of antibiotics requires efficient removal of both antibiotics and their degraded intermediates. In this study, we demonstrate that FeC 2 O 4 •2H 2 O enables the more sustainable conversion of H 2 O 2 to • OH than commonly used FeSO 4 •7H 2 O, promoting the detoxification of a typical antibiotic sulfadimidine. It was found that the FeC 2 O 4 /H 2 O 2 system could completely degrade 250 mg L −1 of sulfadimidine within 40 min at pH 3.0, along with decreasing the contents of chemical oxygen demand and total organic carbon by 295.0 and 33.5 mg L −1 , respectively, more efficient than those in a classical Fenton system (FeSO 4 /H 2 O 2 ). Analysis of sulfadimidine degraded intermediates and toxicity evaluation suggested that the FeC 2 O 4 /H 2 O 2 treatment could more effectively decrease the overall toxicity of the sulfadimidine solution than the FeSO 4 /H 2 O 2 counterpart. The sustainability of FeC 2 O 4 •2H 2 O in H 2 O 2 conversion to • OH was attributed to its controlled release of Fe 2+ into the solution to prevent the quenching of • OH by excessive Fe 2+ , as well as the simultaneous release of C 2 O 4 2− to complex with Fe 2+ and Fe 3+ , which could inhibit iron sludge formation and accelerate Fe 3+ /Fe 2+ redox cycle. This study provides a promising Fenton system for the safe treatment of antibiotics and sheds light on the potential of FeC 2 O 4 •2H 2 O in environmental remediation.
研究领域:
环境科学
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化学工程
·
生物学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Xintao Zhou,Shuyu Tian,Xincong Tian,Zhongqiu Luo,Xiunan Cai,Yanjuan Zhang,Zuqiang Huang
The construction of highly active photocatalysts featuring the merits of high quantum efficiency and superior stability from solid wastes for the photocatalytic degradation of organics remains a great challenge. Herein, an acid leaching and in situ self-assembly strategy was proposed to engineer a series of FeC 2 O 4 /SiO 2 amorphous composites with a Si–O–Fe bridged interpenetrating structure, using copper smelting slag as the only source of Fe and Si. The loaded porous amorphous SiO 2 creates new charge transfer states within the FeC 2 O 4 crystal, and the formed Si–O–Fe bond acts as an electron conduction bridge, extensively promoting charge separation and utilization. The α-FeC 2 O 4 with wider layer spacing was generated under high temperature, which can provide smoother channels for charge transfer. Thus, α-FeC 2 O 4 with higher Si content (α-FOD/Si H ) showed excellent photocatalytic activity, achieving a chlortetracycline hydrochloride removal rate of 91.9 % within 120 min, which is 16.7, 3.8 and 2.0 times faster than copper smelting slag, α-FOD and β-FOD/Si H , respectively. The composite also exhibited remarkable structural stability, with the chlortetracycline hydrochloride removal rates remaining above 85.1 % after five consecutive cycles, ascribed to the interpenetrated SiO 2 structure and the formation of soluble [Fe 3+ -(C 2 O 4 2− ) 2 ] complexes, which greatly reduce iron ions release and prevent the formation of Fe(III) oxide/hydroxide passivation layers. This study provides a new idea for synthesizing highly active and stable FeC 2 O 4 catalysts through a “treat the wastes with wastes” strategy.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2022
·Vol. 7
·期 2
·2200378
·
IF 6.737
Ziying Xiong,Hai Hu,Ziqi Cao,Yaxin Hu,Di Sun,Hengfei Qin,Shifei Kang
Photocatalysis water treatment without artificial energy is cost-effective, waste-free and sustainable. Coventional powder photocatalysts have tiny contact surfaces, low catalytic efficiency, and are difficult to recycle and reuse, restricting their usage. Herein, a Lignin@t-FeC 2 O 4 /g-C 3 N 4 material is developed by engineering hollow quadrangle t-FeC 2 O 4 and g-C 3 N 4 nanosheets on lignin membranes through facile impregnation coating and precipitation reaction. Fast mass transport, catalytic activity and accessibility characterize hollow tetragonal FeC 2 O 4 · 2H 2 O. TEM, SEM and FTIR show that lignin binds t-FeC 2 O 4 and g-C 3 N 4 . The g-C 3 N 4 nanosheets are uniformly wrapped on the surface of lignin fibers, and t-FeC 2 O 4 is loaded between them. This structure increases visible light absorption and active site-contaminant contact. The chain reaction produces extremely active hydroxyl radicals from hydrogen peroxide because the Lignin@t-FeC 2 O 4 /g-C 3 N 4 modules are rich inFe II , according to XPS. Transient photocurrent response curves and electrochemical impedance spectroscopy suggest a promoted charge migration and isolation at the redox reaction interface in the Lignin@t-FeC 2 O 4 /g-C 3 N 4 system. As a result, Lignin@t-FeC 2 O 4 /g-C 3 N 4 degrades 99% Rhodamine B within 40 minutes, and this performance is stable even under difficult conditions, such as low hydrogen peroxide concentration and high pH. This study combines lignin membranes with the photo-Fenton reaction, and thus provides new concept for the development and application of membranes and photocatalysis.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yun Guo,Hong-Yi Li,Shuo Shen,Jie Cheng,Jiang Diao,Bing Xie
Chromium sludge is a hazardous solid waste which cannot be effectively treated but only piled up and abandoned, causing serious environment pollution and resource wasting. This work proposes an effective novel process to separately recover all resources in chromium sludge via a sustainable way. The obtained acid solving liquid from chromium sludge is desiliconized by cationic flocculant (PCAM) to induce coprecipitation of polysilicate gel and PCAM , which mixture is calcinated to generate the product of white carbon black in purity of 94.35% with a recovery of 92.58%. After desiliconization, V in the solving liquid is selectively extracted by microemulsion (ME), which is recovered as V 2 O 5 in purity of 99.34% with a recovery of 95.53% by the subsequent procedure of stripping-precipitation-calcination. The Fe 3+ in raffinate is reduced to Fe 2+ cations by Na 2 SO 3 , and is then recovered by H 2 C 2 O 4 precipitation to generate the FeC 2 O 4 product in purity of 99.12% with a recovery of 98.25%. Cr 3+ cations in residual solution are recovered by alkaline precipitation and calcination to generate the Cr 2 O 3 product in purity of 98.25% with a recovery of 92.68%. This work provides fresh penetrations into the synchronous detoxification, resource recovery and value-added utilization of hazardous industrial solid wastes.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Yue Hu,Guangming Zhan,Xing Peng,Xiufan Liu,Zhihui Ai,Falong Jia,Shiyu Cao,Fengjiao Quan,Wenjuan Shen,Lizhi Zhang
In this study, we coated a high proton conductive shell on the zero-valent iron (ZVI) surface by mechanically ball-milling ZVI with oxalic acid dihydrate (OX-ZVI), and demonstrated that the generated FeC 2 O 4 ·2H 2 O shell dramatically improved the Cr(VI) removal rate of ZVI by about 15–80 times. Owing to a higher proton conductivity of FeC 2 O 4 ·2H 2 O shell than that of Fe 2 O 3 shell, proton could easily transfer through FeC 2 O 4 ·2H 2 O shell into iron core and be reduced to H, accompanying with fast surface-bound Fe 2+ generation, resulting in high efficiency of Cr(VI) removal in a wide pH range. Meanwhile, the removed Cr(VI) was deposited on OX-ZVI surface in the formation of Fe x Cr 1-x (OH) 3 composites, accompanied by the appearance of typical hollow structure derived from iron core dissolution. This study clarifies the significance of proton transfer on the reactivity of zero-valent iron, and also provides a new strategy to prepare highly active zero-valent iron for Cr(VI) removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 37
·15012-15023
·
IF 5.7
Zengmou Li,Qing Zhao,Keyu Zhang,Dingfang Cui,Keqi Chen,Yusheng Gong,Shaoze Zhang,Yin Li,Junxian Hu,Bin Yang,Yaochun Yao
Iron oxalate (FeC2O4) is a promising candidate as an anode material for lithium-ion batteries (LIBs) with its advantages of low cost and high capacity. However, its commercial application is limited by its poor electrical conductivity, which leads to slow chemical reaction kinetics. Herein, a novel FeC2O4-based composite (FeC2O4/Gs) with dual-level structured graphene sheets (Gs) was constructed via electrostatic adherence technology, which enhanced the combination form and composite effect for two discrepant materials. Based on the dual-level structured Gs in FeC2O4/Gs composites, micro-based Gs (∼5 μm) was dispersed between the FeC2O4 particles. Meanwhile, the nano-based (∼50 nm) Gs was coated and embedded on the surface of rod-like FeC2O4 particles. Because of the special structure of FeC2O4/Gs, it has a dual promotion of electron transport both within and on the surface of the FeC2O4 particles, favoring electrochemical activity and efficiently inducing the conversion reaction. Consequently, the FeC2O4/Gs composite achieved a high reversible capacity of 820 mA h g−1 and excellent cycling stability with a capacity retention of 41% after 200 cycles under 10C. This study provides a novel opportunity to design composites and electrodes with electronic conductivity, excellent electrochemical activity and ultrahigh cycling stability for lithium storage.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
International Journal of Environmental Science and Technology
·
2025
·
IF 3.4
Shitu A.,Tadda M. A.,Li H.,Danhassan U. A.,Gouda M.,Zhou J.,Liu D.,Chen W.,Zhu S.
The recent development in mariculture production has led to the global need to find an eco-friendly treatment that could mitigate the detrimental effects of nitrogenous compounds on aquatic species, the environment, and public health. The potential application of corn straw biochar (BC) combined with nano-ferrous oxalate (FeC 2 O 4 ), integrated into a sponge (BC/FeC 2 O 4 /SB) as a cost-effective and sustainable novel carrier for the removal of nitrogenous compounds, was explored in this study. The modified carriers were filled into a moving bed bioreactor (MBBR) to treat simulated saline aquaculture wastewater for the first time. Scanning electron microscope (SEM) and Fourier-transform infrared (FTIR) spectroscopy analyses characterized the carrier biofilm morphology and functional group compositions. Findings showed that the modified carrier achieved the highest reduction percentages of 99.49 ± 0.29% for ammonium and 81.3 ± 2.1% for nitrate, with lower nitrite accumulation by day 136. The microbial sequencing analysis revealed that the coexistence of nitrogen removal and salt-tolerant microbes from the genera Aquimonas (25.15%), Woodsholea (20.44%), Hydrogenophaga (14.73%), Nitrosomonas (4.01%), Rhodococcus (2.70%), and Nitrospira (1.97%) resulted in the enhanced treatment performance observed in the modified BC/FeC 2 O 4 /SB carrier-filled MBBR as compared to the control MBBR. The data obtained in this study provide a comprehensive understanding of the role of modified BC/FeC 2 O 4 /SB carriers for the efficient treatment of saline RAS wastewater using MBBR.
研究领域:
环境科学
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生物技术
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水处理
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微生物学
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海洋科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Sicheng Pan,Yujiang Huang,Wenjun Zhou,Fei Ge,Lizhong Zhu
The concurrent removal of heavy metals and antibiotics from water and soil continues to pose a substantial challenge. In this work, FeC 2 O 4 -assisted ball milling was utilized to prepare a novel bifunctional biochar composite (FeC 2 O 4 @BC) to achieve the simultaneous removal of Cd 2 + and tetracycline (TC). Batch experiments in binary-solute system showed that FeC 2 O 4 @BC can simultaneously remove 69.6 % of Cd 2+ and 93.4 % of TC, while 86.4 % of TC was degraded, which conquered competitive effects between Cd 2+ and TC and exhibited faster kinetic and higher capacity than raw biochar. In this study, FeC 2 O 4 -assisted ball milling for BC provided FeC 2 O 4 @BC with endogenous oxygen vacancies (OVs) by losing lattice oxygen of FeC 2 O 4 , and simultaneously induced exogenous -COOH formation on composite. Mechanistic analysis revealed that OVs in FeC 2 O 4 @BC greatly improved 1 O 2 production for efficient TC degradation by reducing O 2 adsorption energy and accelerating electron transfer to adsorbed O 2 from adjacent Fe(Ⅱ) atoms, which lowered the free energy barrier for the O 2 to singlet oxygen ( 1 O 2 ) conversion. Meanwhile, -COOH significantly increased Cd 2+ complexation on FeC 2 O 4 @BC, which coupled with cation exchange and Cd-π conjugation contributing to Cd 2+ removal. Overall, FeC 2 O 4 @BC holds considerable potential for dealing with combined heavy metals and antibiotics pollution in environment systems.
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Kuang Wang,Guan Wang,Long Zhou,Yuan Zeng,Yifeng Zhang,Zhanqiang Fang
The utilization of nano zero-valent iron (nZVI) in polybrominated diphenyl ethers remediation has been studied extensively. However, challenges in balancing cost and reactivity have been encountered. A submicron zero-valent iron coated with FeC 2 O 4 ·2 H 2 O layers (OX-smZVI) was synthesized via a mechanochemical method, aiming to resolve this contradiction. Characterization via SEM, TEM, and XPS confirmed the structure as FeC 2 O 4 ·2 H 2 O coated iron lamellate with a surface area 24-fold higher than ball-milled zero-valent iron (smZVI). XRD highlighted an Fe/C eutectic in OX-smZVI, boosting its electron transfer capacity . Decabromodiphenyl ether degradation by OX-smZVI follows a two-stage process, with initial degradation by FeC 2 O 4 ·2 H 2 O and a subsequent phase dominated by electron transfer . OX-smZVI exhibits a 4.52–34.40 times faster BDE209 removal rate than nZVI and scaled-up OX-smZVI displayed superior reactivity with preparation costs only 1/680 of nZVI. Given its enhanced reactivity and cost-efficiency, OX-smZVI emerges as a promising replacement for nZVI.
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
危险品化学品经营许可证（带存储）