JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 48
·21853-21868
·
IF 4.682
Yang Hongzhi,He Tianpei,Wu Yaohui,Luo Jinhua,Zhang Aihua,Chen Xiaoyong,Zeng Yelin,Wang Yonghong,Zhao Yunlin,Wang Guangjun
A novel PbMoO 4 @MBC (MBL-2) magnetic heterojunction photocatalyst was prepared by the successful loading of Fe 3 O 4 with PbMoO 4 onto the highly conductive BC surface through the integration of co-precipitation and pyrolysis. Using advanced characterization methods could reveal the composition, morphology, and optoelectronic properties of the material. The results showed that using BC as the electron transfer interface provided a pathway for charge transfer between Fe 3 O 4 and PbMoO 4 , and importantly, the PbMoO 4 @MBC (MBL-2) nanocomposite had a large specific surface area, excellent magnetic response, high light absorption capacity for efficient carrier separation, and thus the photocatalytic activity was high. The degradation rate of MBL-2 for TC under visible light was as high as 89%. More importantly, PbMoO 4 @MBC (MBL-2) possessed good stability and reusability. The Z-scheme electron transfer pathway for improved photocatalytic performance was proposed by radical capture experiments and electron spin resonance (ESR) measurement analysis. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Runnan Zhang,Yanyan Liu,Wanqi Ou,Yuying Ye,Kai Xu
Polycyclic Aromatic Hydrocarbons (PAHs) are persistent organic pollutants that are widely present in aquatic environments and pose a significant threat to the ecological environment and human health. This study introduces a novel magnetic biochar-supported metal oxide catalyst (CeO 2 /BC@Fe 3 O 4 , CBF) as a peroxymonosulfate (PMS) activator in phenanthrene (PHE) degradation in aqueous environments. The degradation performance of the CeO 2 /BC@Fe 3 O 4 composite material was investigated through degradation experiments. The results showed that under the optimal reaction conditions, the degradation efficiency of 20 mg/L PHE solution within 60 minutes could reach 99.55% and maintained stability within a wide range of pH values. Radical quenching and EPR studies confirmed the involvement of SO 4 ·- , ·OH and 1 O 2 in the removal of PHE during the degradation process. The possible degradation pathways were proposed based on the identification of intermediates. The catalyst demonstrated excellent reusability and was effective in real water samples and for other organic pollutants, highlighting its potential for practical environmental applications.
研究领域:
环境科学
·
催化化学
·
水处理
·
污染物降解
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2020
·
IF 6.793
Yanluo Xie,Huakang Liu,Hao Li,Hao Tang,He Peng,Heng Xu
Di-(2-ethylhexyl) phthalate (DEHP) has been classified as a priority pollutant which increased the healthy risk to human and animals dramatically. Hence, a novel biochemical system combined by DEHP-resistant bacterial flora (B) and a green oxidant of persulfate (PS) activated by Nano-Fe 3 O 4 was applied to degrade DEHP in contaminated soil. In this study, the resistant bacterial flora was screened from activated sludge and immobilized by sodium alginate (SAB). Nano-Fe 3 O 4 was coated on biochar (BC@Fe 3 O 4 ) to prevent agglomerating in soil. X-ray diffraction (XRD) and scanning electron microscope (SEM) were utilized to characterize BC@Fe 3 O 4 . Results demonstrated that the treatment of biochemical system (SAB + BC@Fe 3 O 4 + PS) presented the maximum degradation rate about 92.56% within 24 days of incubation and improved soil microecology. The 16S rDNA sequences analysis of soil microorganisms showed a significantly different abundance and a similar diversity among different treatments. Kyoto Encyclopedia of Genes and Genomes (KEGG) functional genes difference analysis showed that some metabolic pathways, such as metabolism of cofactors and vitamins, energy metabolism, cell growth and death, replication and repair, were associated with the biodegradation of DEHP. Besides, DEHP was converted to MEHP and PA by biodegradation, while DEHP was converted to DBP and PA by persulfate and BC@Fe 3 O 4 , and then ultimately degraded to CO 2 and H 2 O.
研究领域:
环境科学
·
微生物学
·
土壤学
·
基因组学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2026
·Vol. 9
·期 32
·15380-15394
·
IF 5.8
Liu Han,Gao Zijian,Yang Qingyu,Jiang Bowen,Yin Kuibo
The rapid development of multispectral
detection technology
has
severely restricted single-band stealth materials, driving the demand
for radar–infrared-compatible multispectral stealth. However,
conflicts between the stealth mechanisms of these two bands pose significant
challenges. Herein, a lightweight and highly elastic composite aerogel
composed of 0D Fe 3 O 4 nanoparticles, 1D bacterial
cellulose (BC), and 2D MXene nanosheets is fabricated via self-assembly
and bidirectional freeze-drying. The porous structure and component
optimization effectively prevent MXene nanosheet stacking and improve
impedance mismatch. Benefiting from excellent dielectric–magnetic
coupling, the aerogel achieves a minimum reflection loss (RL min ) of −76 dB at 1.52 mm, the absorption efficiency per unit
thickness reaches an excellent value of −50 dB/mm, an effective
absorption bandwidth (EAB) of 5.12 GHz at 1.54 mm, and a maximum radar
cross-sectional (RCS) reduction of 30 dB·m 2 , demonstrating
outstanding radar stealth. Moreover, it exhibits excellent thermal
insulation (thermal conductivity of 0.049 W/m·K) and a low infrared
emissivity of 0.666 (8–14 μm), enabling remarkable infrared
camouflage. This work provides a simple and efficient strategy for
developing high-performance radar–infrared-compatible stealth
materials.
✓ 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）