JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shuyun Tai,Lei Sun,Yuxin Wang,Ruolan Huang,Yang Yang,Yu Chen,Hong Chang
Two-dimensional MoS 2 -based advanced oxidation processes (AOPs) have recently shown significant promise in wastewater treatment. However, the activation of different oxidants leads to distinct degradation mechanisms and transformation pathways for organic pollutants. In this study, we explored the distinct mechanisms of chemical exfoliation (ce-MoS 2 ) in activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and H 2 O 2 for the degradation of roxarsone (ROX). The removal efficiency of ROX is in the order of ce-MoS 2 /PMS > ce-MoS 2 /PDS > ce-MoS 2 /H 2 O 2 , with the highest total organic carbon (TOC) removal rate achieved by ce-MoS 2 /PDS. The ce-MoS 2 /PMS system primarily generates radicals (·OH, SO 4 ·- ) and oxidizes ROX to As(V), while PDS is weakly adsorbed onto the surface vacancies (SVs) to form surface complexes (PDS*), facilitating ROX removal through an electron transfer pathway rather than radical-mediated reactions. H 2 O 2 is strongly adsorbed to SVs, directing the ce-MoS 2 /H 2 O 2 system to predominantly convert H 2 O 2 into H 2 O via a two-electron (2e - ) reduction pathway. The distinct activation pathways and types of reactive species led to differences in ROX removal efficiency, product transformation, and toxicity. This study clarifies the role of ce-MoS 2 in peroxide activation and offers guidance for the strategic design of MoS 2 -based composites tailored to specific oxidants, aiming to improve wastewater treatment efficiency.
研究领域:
环境科学
·
材料化学
·
废水处理
·
催化
·
高级氧化工艺
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuanghui Liu,Zefeng Ge,Mingxun Zeng,Huiyan Zhang
Aldehydes and ketones are regarded as important precursors for hydrocarbon fuel production due to their structural stability and ease of hydrodeoxygenation. In this study, a composite metal catalyst was constructed using alumina as the matrix and Zr and Ce as the active components, which was applied to catalyze the rapid pyrolysis of cellulose for the preparation of aldehydes and ketones. The synergistic roles of metal elements and the transformation pathway of aldehydes and ketones were elucidated, along with the influence of process parameters on product distribution and catalyst structure on activity and coke formation. The results demonstrate that the bimetallic alumina-supported catalyst outperformed the single-metal counterpart, with Zr-Ce/α-Al 2 O 3 showing higher aldehyde and ketone selectivity than Zr-Ce/γ-Al 2 O 3 due to two additional acid sites. Under in-situ pyrolysis at 450 °C and a 1:3 feedstock-to-catalyst ratio, 76 % selectivity to aldehydes and ketones was achieved. ZrO 2 and CeO 2 regulated the acidic sites of alumina and provided lattice oxygen, while the alumina support, in turn, enhanced the catalytic activity of the active metals. The co-precipitated catalyst, with higher BET surface area and stronger acidity, enabled a lower dosage and exhibited greater CeO 2 reducibility. Furfural was identified as the main product of catalytic pyrolysis. Under limited acid sites, it could be converted to 2-methylfuran via hydrogenation or to butanone through ring-opening. Excessive acidity promoted its oxygen addition, leading to acetic acid, which was subsequently ketonized to acetone. In addition, FTIR of the spent catalyst revealed oxygen in coke deposits mainly existed as bound water.
研究领域:
催化化学
·
生物能源
·
材料科学
·
热化学转化
·
可再生燃料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Hao Pan,Zhen Yan,Huihui Cao,Yifei Ye,Jing Zhao,Siyuan Qu,Guangtong Hai,Xiubing Huang
The valorization of 5-hydroxymethylfurfural (HMF) offers a sustainable pathway to address escalating global energy demands, making the design of efficient electrocatalysts for HMF oxidation reaction (HMFOR) a critical research priority. In this study, we synergistically integrated cationic defect engineering and Ce doping to optimize layered double hydroxides (i.e., NiAl-LDHs) for efficient HMFOR. The experimental results show that the coexistence of Ce species and cationic defects synergistically modulates the electronic structure of Ni species, maximizing the exposure of active Ni sites while enhancing electrical conductivity. Furthermore, the introduction of Al 3+ vacancies and Ce 3+ /Ce 4+ redox pairs promotes the formation of high-valent Ni 3+ active species. This dual modification strategy significantly enhances HMFOR performance, with NiAlCe(3%)-LDH-E achieving benchmark metrics at 1.45 V RHE :100% HMF conversion, nearly 100% 2,5-furandicarboxylic acid yield, and nearly 99% Faradaic efficiency. Density functional theory (DFT) calculations validate that cationic defects and Ce doping cooperatively optimize HMF adsorption at active surface centers and reduce the energy barrier for the rate-determining *HMF dehydrogenation to *HMF-to-5-hydroxymethyl-2-furancarboxylic acid (*HMFCA) step, providing atomic-level insights into the enhanced catalytic mechanism.
研究领域:
电催化
·
材料科学
·
可持续能源
·
绿色化学
·
密度泛函理论
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Dan Chen,Kan Li,Hanyue Bao,Ming Zhai,Zhong Wang,Xiaozhi Wang
In this paper, a series of Ce@Mn core-shell catalysts were synthesized via a two-step hydrothermal method. Hydrothermal temperature significantly influenced the structure formation of catalysts. The Ce@Mn-150 catalyst, synthesized at 150 °C exhibited a well-defined core-shell structure. Moreover, it converted approximately 35 % of HCHO into CO 2 and H 2 O at ambient temperature, and achieved 90 % conversion of HCHO at 90 °C. Through structural characterization of the catalysts, distinct morphological differences were observed across all samples. The Ce@Mn-150 catalyst, which demonstrated the optimal catalytic activity, exhibited the most complete core-shell structure. The formation of the core-shell structure promoted the generation of Ce-Mn interfacial effects, which in turn modulated the interactions between Ce and Mn species . Elemental valence state characterization revealed that the well-defined core-shell structure facilitated the generation of Mn 3+ and Ce 3+ species, along with enhanced concentrations of surface-adsorbed oxygen (O ads ) and oxygen vacancies (O v ), which collectively enhanced HCHO adsorption and activation. H 2 -TPR results indicated that the core-shell structure enhanced the low-temperature reducibility of the catalyst and preserved abundant oxygen vacancies. This study revealed the influence of core-shell structures and intermetallic interactions at the core-shell interface on the catalytic performance of the catalyst, providing insights for designing efficient non-noble metal catalysts for HCHO removal.
研究领域:
环境催化
·
材料化学
·
大气污染控制
·
表面科学
·
纳米材料
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Juliana Gaithan Kauno,Haili Wei,Shiyu Xia,Wenping Gao,Zohaib Saddique,Fenghua Li,Fengxia Wu,Guobao Xu,Hsien-Yi Hsu,Ziaur Rehman,Yu Tian,Wenxin Niu
The phosphate ion (PO 4 3− ) is essential for growth, especially skeletal development. However, high PO 4 3− levels can signal health problems, such as hyperphosphatemia, which indicates chronic kidney disease due to reduced filtration, leading to serum phosphate buildup. Therefore, there is a pressing need for an accurate and convenient method for PO 4 3− analysis. Considering the significance of its detection, several techniques based on nanozymes have been employed, and among them, fluorometry is one of the most robust and efficient techniques. In terms of nanozymes, current developments suffer from low catalytic activity and non-specific inhibition. To address these issues, we present a solid-solution strategy for synthesizing Ce–Zr–O nanozymes with a defect-rich polycrystalline structure, providing a highly specific and efficient sensing platform. The approach is simple and cost-effective, yielding Ce–Zr–O nanozymes with excellent uniformity, controllable size, and morphology. Incorporating Zr 4+ into the CeO 2 lattice induces abundant oxygen vacancies and structural heterogeneity, which synergistically enhance the phosphatase-like activity by enhancing Lewis acid catalysis and aiding the nucleophilic hydrolysis of 4-methylumbelliferyl phosphate (4-MUP). Notably, phosphate (PO 4 3− ) ions specifically bind to Zr sites, altering their electronic environments and attenuating catalytic performance. In exploiting this selective inhibition, we developed a fluorometric phosphate assay with high selectivity and sensitivity. The Ce–Zr–O nanozymes detected phosphate with a limit of detection (LOD) of 0.061 nM, allowing precise measurement of phosphate in urine. This study presents a generalizable defect-engineering method for Ce–Zr–O nanozymes, creating a reliable platform for interference-resistant biosensing in biological fluids.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Bio
·
2026
·
IF 10.2
Yongkang Lai,Yongliang Ouyang,Xiaojing Yin,Tao Yu,Jianhua Wan,Xueyang Li,Yi Hu,Xu Shu,Huan Wang
Chronic pancreatitis (CP) is a lifelong progressive fibrotic inflammatory disorder for which no effective cure is currently available. Persistent and recurrent inflammatory stimulation induced by reactive oxygen species (ROS) is a key driver of pancreatic fibrogenesis, making oxidative stress a promising therapeutic target to halt disease progression. In this study, we developed a nanosystem, HC@CeMOF, consisting of a small-sized cerium-based metal–organic framework (CeMOF) core loaded with curcumin and coated with hyaluronic acid (HA), enabling precise targeting of inflamed pancreatic tissue. HC@CeMOF exhibits a small-sized particle size along with favorable cellular and biological safety profiles. Once administered in vivo , the nanosystem exploits the specific binding affinity of HA to CD44 receptors on macrophages to selectively accumulate at inflamed pancreatic sites. Subsequently, the cerium-based nanozyme efficiently scavenges ROS through the reversible redox cycling between Ce 3+ and Ce 4+ , while the slow release of curcumin further suppresses the NF-κB signaling pathway and modulates inflammatory cytokine levels, thereby achieving synergistic anti-inflammatory and antioxidant effects. Collectively, these mechanisms substantially attenuate CP progression. This targeted ROS-scavenging and anti-inflammatory strategy holds promise as an alternative therapeutic approach for chronic pancreatitis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 68
·15586-15593
·
IF 5.16
Rengui Li,Yixuan Yang,Na Sun,Long Kuai
Development of Pt group metal-free catalysts for low-temperature CO oxidation remains critical. In this work, active and stable mesoporous Cu-Ce-O x solid solutions are prepared by using spray pyrolysis. The specific surface areas and pore volumes reach as high as 170 m 2 g −1 and 0.24 cm 3 g −1 , respectively. The results of CO oxidation study suggest that (1) the catalyst obtained by spray pyrolysis possesses much higher activity than those made by co-precipitation, sol-gel, and hydrothermal methods; (2) the optimal Cu 0.2 -Ce 0.8 -O x solid solution presents a reactivity over 28 times that of both single-component CuO and CeO 2 at 70 °C. Based on the study of pure-phase Cu-Ce-O x solid solutions by selective leaching of segregated CuO x species, the active center for CO oxidation is confirmed as the bimetallic Cu-Ce-O site, whereas the individual CuO x particles not only act as spectators but also block the active Cu-Ce-O sites. A low apparent activation energy of approximately 48 kJ mol −1 is detected for CO oxidation at the Cu-Ce-O site, making Cu-Ce-O x solid solutions able to present high activity at low temperature. Furthermore, the Cu-Ce-O x catalysts exhibit excellent stability and thermal tolerance toward CO oxidation. Graphical Pt-free CO oxidation : Well-shaped mesoporous Cu-Ce-O x solid solutions were produced for low-temperature CO oxidation by using a nitrate spray pyrolysis route, and a selective leaching strategy was adopted to remove the surface segregated CuO x species. The bimetallic Cu-Ce-O site was confirmed as the active center for CO oxidation, whereas the individually segregated CuO x species not only acted as spectators, but also blocked the active Cu-Ce-O sites (see scheme).
研究领域:
催化化学
·
材料科学
·
环境化学
·
能源化学
·
纳米材料
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2018
·
IF 0
Ke Li,Ke Liu,Hong Ni,Bin Guan,Reggie Zhan,Zhen Huang,He Lin
A novel catalytic system combining oxidation catalyst with electric field was applied for low-temperature CH 4 oxidation at low CH 4 concentration (0.2% CH 4 ). Compared with conventional catalytic process, significant improvement in activity was observed over PdCeZrO x catalyst in electric field. For example, the light-off temperature (T 50 ) of CH 4 (0.2% CH 4 ) of 1 wt % PdCe 0.75 Zr 0.25 O x catalyst was approximately 255 °C in an electric field with 3 mA electric current. The impact of electric field in CH 4 oxidation over PdCeZrO x catalyst was thoroughly investigated. The XRD and XPS results revealed that electric field provided free electrons that facilitated the release of lattice oxygen in the ceria-zirconia solid solution, therefore reinforced Pd0 oxidation and the formation of palladium oxide (PdO x , x > 0) on catalyst surface. Electric field also enhanced the reducibility of the PdO x , which provided active oxygen for CH 4 oxidation at low temperature. With in-situ FTIR technique, it was found that electric field greatly promotes the chemisorption and dehydrogenation of CH 4 , thereby accelerates the chemical reactions of the intermediate products, so as to promotes CH 4 oxidation. The mechanism of catalytic oxidation of CH 4 in electric field was proposed based on comprehensive investigations above.
研究领域:
催化化学
·
环境科学
·
材料化学
·
能源化学
·
表面科学
✓ 已验证
DOI
FUEL PROCESSING TECHNOLOGY
·
2018
·
IF 3.956
Shu-Sen Liu,Yong-Yong Jin,Yahong Han,Jinxian Zhao,Jun Ren
It is a big challenge to improve the stability and anti-coking abilities of catalyst in high temperature CO methanation reaction. To address the issue, SiC was chose as the support, and Ce was used as a promoter to prepare supported Ni catalysts for CO methanation. A long-term high temperature stability evaluation experiment was carried out at 600 °C for 100 h in comparison with Ni/Al 2 O 3 catalyst. The catalysts were characterized by a combination of characterization techniques for understanding the catalytic performance and carbon deposition behaviors in CO methanation. The life test result indicates that, compared to Ni/Al 2 O 3 , Ni/SiC is thermally stable and highly resistant to carbon deposition . Improved cataytic activity and stability was further reached by introduce of Ce promoter into Ni/SiC, which can be attributed to the enhanced interaction between Ni and SiC and improved dispersion of Ni active species.
研究领域:
催化化学
·
能源化学工程
·
材料科学
·
工业催化
·
化学反应工程
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Wanyin Ge,Maohao Yang,Honglei Yin,Shifan Shang,Zili Luo,Xin Xie,Ye Tian
SiAlON-based phosphors have garnered considerable attention in the field of white lighting owing to their excellent thermal stability, and rare earth doped SiAlON-based phosphors are expected to be used in a new generation of lighting sources. In this work, Eu 2+ or Ce 3+ doped Si 3 Al 3 O 3 N 5 phosphors were synthesized by high temperature solid phase method. The microstructure of the phosphors exhibited irregular grain. The two phosphors exhibit green and cyan luminescence under 365 nm excitation, which are derived from the 5 d -4 f transitions of Eu 2+ and Ce 3+ , respectively. The quenching concentrations are 3 % and 4 % for Eu 2+ and Ce 3+ doped phosphors , respectively. The fluorescence intensity of Eu 2+ and Ce 3+ activated SiAlON powders decreased to 50 % of the room temperature intensity at 179 °C and 170 °C, respectively. The thermal activation energy values of the two phosphors were 0.35 eV, and the coordinate configuration diagram was constructed to comprehensively analyze the thermal quenching behavior of phosphors. Finally, the two phosphors powders were mixed with red and blue fluorophore to obtain white LEDs, showing low color temperature, high color rendering, high power unsaturation and long half-life. The SiAlON-based phosphors with excellent thermal stability obtained in this work achieve different wavelengths of luminescence in the green region. The results show that the β -Si 3 Al 3 O 3 N 5 phosphor can be used as a candidate material for high-quality green light supplement for wLEDs .
研究领域:
材料科学
·
光电子学
·
发光材料
·
固态照明
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Zhipeng Xie,Baolu Liu,Chenfan Xie,Bin Yang,Yunfen Jiao,Dingjian Cai,Liang Yang,Qi Shu,Anhong Shi
Zn/Ce redox flow battery (ZRFB) is emerging as a promising technology to store large amount of energy economically and efficiently, wherein a highly efficient positive electrode with a continuous and fast electronic and ionic transportation path is urgently desired. The unique nanostructure of reduced graphene oxide (RGO) paper electrode is prepared by a simply chemical reduction method, which facilitates transference of the electron and Ce 3+ /Ce 4+ at the electrolyte/electrode interface. Thus ZRFB exhibits superior extent of charge (81.0%) and energy efficiency (71.3%). The results show RGO paper is a good candidate for positive electrode of ZRFB.
研究领域:
储能
·
电化学
·
材料科学
·
可再生能源技术
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
·
2024
·Vol. 78
·期 4
·2275-2285
·
IF 2.1
Shu Ronglu,Du Yifan,Cao Liping,Zhao Hui,Luo Xiaoying,Wang Wei
Cerium samarium oxides catalysts with K + doping on the wall surface of cordierite honeycomb ceramics were preparation by sol–gel and dipping processes. Scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform-infrared spectroscopy were used to characterize the structural morphology and phase compositions. Through XPS analysis and H 2 -TPR measurement of monolithic catalyst, it is found that potassium ions improve the oxygen mobility in CeO 2 lattice and form surface active oxygen, increase the amount of oxygen adsorbed on the surface and improve the oxidation–reduction capacity. The catalytic combustion research demonstrates that T 10 , T 50 and T m in samples (Ce/Sm-0 K, Ce/Sm-0.3 K, Ce/Sm-0.5 K and Ce/Sm-0.7 K) decrease significantly compared with the blank reference (Cordierite). And the optimized sample Ce/Sm-0.5 K possess the lowest T 10 (389.6 °C), the lowest T 50 (425.5 °C), and the lowest T m (419 °C) in comparison with other samples. The cycle stability investigation reveals that sample Ce/Sm-0.5 K has excellent structural stability and stable catalytic performance, which has potential application in soot catalytic combustion field.
研究领域:
催化化学
·
材料科学
·
环境工程
·
化学工程
·
表面科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）