INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Guanjie Xue,Hongliang Fu,Zhan Shaocong,Wenyao Xue,Yue Lian,Yongfeng Hu,Jing Zhao,Huaihao Zhang
It is crucial to rationally design multi-component composite catalysts with high activity and strong stability for electrolytic water/seawater oxidation. In this work, we synthesized porous rod-like Ni–Fe 2 Mo 3 O 8 @NC catalysts via high-temperature phase transformation of FeMoO 4 into Fe 2 Mo 3 O 8 , melamine pyrolysis, and Ni-doping. Specifically, high-temperature anoxic environment and lattice oxygen release trigger partial Mo 6+ reduction and Fe 2+ oxidation in FeMoO 4 . The monoclinic FeMoO 4 undergoes phase transition to form hexagonal Fe 2 Mo 3 O 8 with mixed valence characteristics, enabling original rod-like structure retention, as well as active site density and electron transport efficiency enhancement. Meanwhile, via hot solvent method, the lone pair electrons of N atoms in melamine coordinate with empty d-orbitals of metal ions in Ni–FeMoO 4 , forming strong coordination bonds. Subsequent high-temperature carbonization accomplishes melamine pyrolysis with NH 3 evolution, which etches rod-like Ni–Fe 2 Mo 3 O 8 to form porous structure. Simultaneously, the synergistic interaction among Ni–Fe–Mo can optimize reaction intermediates adsorption energy, thereby enhancing material catalytic performance.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Dawei Song,Yukun Pan,Huan Chen,Yaqin Shi,Yanan Huang,Bo Niu,Donghui Long,Yayun Zhang
Singlet oxygen ( 1 O 2 ) plays a crucial role in environmental catalysis owing to its long lifetime, strong electrophilicity, and high selectivity, whereas selective generation of 1 O 2 with conventional catalysts remains challenges. Herein, we for the first time construct a FeS 2 -FeMoO 4 heterostructure supported on graphene oxide (FeMoS-GO), and subsequently evaluate its efficacy in peroxymonosulfate (PMS) activation for degrading organic pollutants. Compared with non-heterostructures, our catalyst alters the electron density and coordination environment of Fe and Mo, enhancing electron transfer and facilitating the cyclic conversion of Fe 2+ /Fe 3+ during PMS adsorption and activation. Experiments indicate that FeMoS-GO generates nearly 100 % 1 O 2 , with concentrations two to three orders of magnitude higher than those of •OH and SO 4 •- . Density functional theory (DFT) calculations and electrochemical tests also support the high efficiency of electron transfer and PMS adsorption by heterostructure. The degradation for phenol of FeMoS-GO is 100 times faster than that of the non-heterogeneous structure, and its degradation rate for various organic pollutants exceeds 90 %, while also demonstrating satisfactory performance in interference and stability tests. Our findings offer new insights and approaches for the efficient and controlled generation of 1 O 2 in water treatment and environmental remediation.
研究领域:
环境催化
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材料科学
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高级氧化过程
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水处理技术
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多相催化
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Yanyan Li,Liangchen Li,Zhengming Zhou,Xiaojie Xiong,Liying Huang,Jingjing Gu,Chen Gao,Tingting Liu,Xuedong Wang,Guozhong Dong
Background Emerging pollutants such as enrofloxacin (ENR) pose a serious threat to the ecosystem and public health due to their resistance to degradation and tendency to accumulate in the environment. Although existing antibiotic detection techniques have considerable application value, they suffer from high costs, complex operation procedures, or insufficient sensitivity. Therefore, there is an urgent need to develop a new detection method that is simple, rapid, low-cost, and environmentally friendly to efficiently monitor antibiotic pollution in environmental water bodies and safeguard public health. Results In this work, inspired by the superior catalytic activity of three-dimensional (3D) composite nanomaterials, we rationally designed and synthesized FeMoO 4 /Fe 7 S 8 nanosheet flower composites (3D FeMoO 4 /Fe 7 S 8 NSFs) as a novel peroxidase-mimicking nanozyme for the sensitive colorimetric detection of ENR. The as-synthesized NSFs exhibit outstanding intrinsic peroxidase-like activity, enabling their direct integration into a colorimetric sensing platform. Critically, the synergistic redox coupling between Mo 6+ /Mo 4+ and the Fe 2+ /Fe 3+ couple facilitates rapid electron transfer, thereby promoting efficient activation of peroxymonosulfate (PMS) to generate reactive oxygen species—including hydroxyl radicals (·OH), sulfate radicals (·SO 4 − ), singlet oxygen ( 1 O 2 ), and superoxide radicals (·O 2 − ), which collectively drive the oxidation of chromogenic substrates without requiring external enzymatic or chemical initiators. This mechanism underpins a robust, single-step colorimetric assay that overcomes key limitations of conventional methods, such as stringent temperature control, prolonged reaction times, and narrow pH operational windows, thus enabling rapid, reliable ENR quantification. The optimized sensing platform delivers a wide linear range (0.500–70.0 μM), a low detection limit (LOD) of 0.150 μM (S/N = 3), and a total assay time of only 5 min. Significance This system breaks through the limitations of traditional methods in terms of temperature, time, and pH conditions, and successfully generates free radicals and non-free radical active substances by activating PMS, thereby achieving rapid and efficient detection of antibiotics. This innovation provides a highly promising new strategy for the identification of fluoroquinolone (FQs) antibiotics and shows broad application prospects in the field of environmental pollutant detection and monitoring.
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产品关联
DOI
PubMed
高影响因子
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