APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xiaocong Liu,Yi Wang,Fuping Zhang,Bo Xing,Guo Yang,Kaibin Zhang,Xingyong Liu,Yan Huang,Min Li,Mingliang Wu
Widespread and ineffective dye treatment in aquatic environment leads to serious pollution problems, threatening ecology and human health. Herein, manganese cerium bimetallic oxide cathode material (MnCeO x @GF) was prepared by hydrothermal method combined with calcination, and the electrochemical Fenton degradation performance of a typical dye Rhodamine B (Rh B) was investigated. The results show that the degradation of Rh B by MnCeO x @GF can reach 96.5 % within 2 h in acidic environment and continue to perform effectively after 4 repeated experiments. Combined with SEM and electrochemical test results, it can be seen that the bimetallic composite oxides formed by manganese and cerium on the surface of the support can effectively enhance the catalytic activity of the material, the addition of cerium changes the morphology of manganese oxides and promotes the generation of multiple valence composite oxides of transition metals, and improves the degradation of Rh B. Based on the free radical masking experiments, hydroxyl radical (·OH) is the main active substance in the electro-Fenton degradation process. This work not only provides a way to design and manufacture cathode materials for in situ electrosynthesis of H 2 O 2 , but also provides an important reference for improving the reusability of cathodes for sustainable dye wastewater treatment.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 8
·e7556
·
IF 3.7
Muhammad Jawad Ahmad,Xue Lu,Liye Liang,Guangming Li
Since catalytic chemoselective reduction of corresponding nitroarenes is a significant route to produce functionalized anilines, developing inexpensive and highly active catalyst is imperia. Herein, the Co-Ce-H 2 salen-hmta composite was first prepared by grinded completely the mixture of Co-H 2 Salen and hexamethylenetetramine (hmta) in 1:1 mol ratio in a mortar. The 3d–4f hetero-metal Co-Ce-H 2 salen coordination polymer acted as a support precursor and hmta provided the nitrogen source. Then, a target catalyst of Co/NC-CeO 2 -hmta were afforded by pyrolysis of Co-Ce-H 2 salen-hmta composite at 800°C in the presence of argon atmosphere. When the target catalyst of Co/NC-CeO 2 -hmta and reference catalysts were applied for the hydrogenation of nitroarenes under N 2 H 4 , the target catalyst of Co/NC-CeO 2 -hmta exhibited better performance than reference catalysts in terms of conversion, yield, selectivity, and recyclability. Spectral analysis suggested that the high catalytic performance of a target catalyst of Co/NC-CeO 2 -hmta were attributed to highly dispersed metallic Co 0 , rich oxygen vacancies, and nitrogen-doped carbon matrix.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Jing-Rui Zhang,Fa-Qiang Zhong,Lu-Bing Zhong,Zheng-Jun Dong,Quan-Bao Zhao,Zhimin Ao,Darren Delai Sun,Jia-Cheng E. Yang,Yu-Ming Zheng
An unprecedented type of 3D porous millimetric ozonation catalyst confining Mn-Ce dual-atom sites in terracotta support (MCT) was hereby reported through a feasible interface oxygen-induced ordering strategy. The utilization of cerium tailored the electron/valence state of dual-atom sites through its oxyphilic 4 f orbitals, making MCT present excellent ozone catalysis to remove model recalcitrant fulvic-like acids. The TOC removal kinetics value by MCT is 2.71 and 3.68 times higher than those of catalysts confining single Mn and Ce sites, respectively. The optimized MCT exhibited robust reusability without any regeneration (above 87% of TOC removal for each cycle), and desirable removal for the biochemical effluent organics of landfill leachate, showcasing a potential of deeply purifying saline wastewater. The electron complementary effect of cerium in dual-atom sites accelerated the electron transfer for O 3 catalysis, thus promoting the formation of reactive radicals for pollutant degradation via a thermodynamically feasible surface-adsorbed oxygen pathway. This work highlights the importance of elaborately designing dual-atom metal sites to construct reusable monolithic ozonation catalysts with electron self-cycle function for advanced wastewater purification.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Chaocheng Liu,Xucai Kan,Feng Hu,Xiansong Liu,Shuangjiu Feng,Jiyu Hu,Wei Wang,Khalid Mehmood Ur Rehman,Mudssir Shezad,Cong Zhang,Haohao Li,Shengqiang Zhou,Qiuyue Wu
Herein, we have systematically illustrated the specific impact of Ce-Zn co-substituted M-type strontium hexaferrites on its microstructure and magnetic properties . An evident phase pattern change process and performance improvement are observed from a series of systematic measurements. The results of X-ray diffraction show that the single phase can be obtained when x = 0.00–0.30, the other unexpected diffraction peaks of hematite ( α -Fe 2 O 3 ) will appear in the patterns as x > 0.3. Scanning electron microscopy exhibits that all samples formed the uniform plane hexagonal structures with different substitution contents. FT-IR spectra verify the confirmation that M-type hexagonal structure has been formed thoroughly. M ( T ) curve displays the ferrimagnetic behavior of temperature dependent magnetization. And vibrating sample magnetometer indicates both M s and H c can be improved significantly, indicating an excellent performance in novel recording devices.
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CRYSTAL GROWTH & DESIGN
·
2026
·Vol. 26
·期 15
·5988-6000
·
IF 3.6
Zhang Ge,Deng Lihan,Li Jin
Formaldehyde, a common indoor air pollutant, poses a
serious threat
to human health. Therefore, there is an urgent need to develop highly
selective and sensitive formaldehyde gas sensors that operate at room
temperature. Doping with rare-earth elements is an effectively proven
strategy for optimizing the gas-sensing performance at room temperature.
This study developed a method to modify ZnO derived from ZIF-8 by
doping it with the rare-earth element cerium (Ce). The Ce-doped ZnO
(ZCO) series of sensors inherit the shell-and-core architecture derived
from the ZIF-8 precursor, featuring a high specific surface area that
provides support for gas-sensing reactions. Additionally, Ce doping
induces the formation of more oxygen vacancies, thereby enhancing
the formaldehyde adsorption. Among these, the ZCO-2 gas sensor exhibits
the best formaldehyde sensing properties at room temperature, with
a responsiveness of 1006 for 500 ppm formaldehyde (77.4 times that
of a pure ZnO gas sensor) and a response/recovery time of 9/3 s. Because
of the high response value, fast response/recovery time, excellent
selectivity, repeatability, and stability of this gas sensor, it has
a very promising prospect in practical applications.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·Vol. 65
·期 28
·15176-15189
·
IF 3.9
Wu Zuhao,Wu Shengji,Han Zhongxi,Li Siyue,Wang Hui,Yin Haoyong,Liu Juanjuan,Zhou Jie
Cerium-based
composite oxides have been intensively investigated
for the elimination of elemental mercury (Hg 0 ) from natural
gas and flue gas. Because of distinct operational conditions, the
required types of active oxygen species in composite oxides differ
substantially between these two atmospheric environments. Nevertheless,
the diversity of oxygen species has led to considerable debate regarding
the active sites responsible for the Hg 0 removal. The exploration
of these oxygen species is essential as it directly guides the rational
design of active sites in sorbents. In this work, we designed and
synthesized sorbents with different oxygen species and systematically
investigated the contributions of these oxygen species in the Hg 0 removal reaction. Cu–Mn–Ce (CMC) composite
oxides were successfully prepared by the coprecipitation method. Characterization
results indicate that the incorporation of Cu and Mn ions into the
CeO 2 lattice indeed significantly increases the concentration
of oxygen vacancies and releasable lattice oxygen. The Hg 0 removal efficiencies of CMC for natural gas and flue gas can be
maintained above 90.0% and 99.0%, respectively, even under a high
gas hourly space velocity of 480,000 h –1 . Furthermore,
CMC exhibits superior cyclic stability and high SO 2 resistance
for Hg 0 removal. Combined with the results from adsorption
tests and characterization, it can be concluded that the surface-active
oxygen species determine the catalytic oxidation and adsorption efficiency
of Hg 0 , while the releasable lattice oxygen species ensure
the continuous supply of active oxygen under extremely oxygen-deficient
conditions.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 10
·693
·
IF 5.4
Li Sirui,Wang Shanshan,Chang Guorui,Yang Yaoxing,Feng Hui,Xue Haoqian,Zhang Li,Luo Manlin,Liu Jing,Li Bowen,Xu Shuxia
To enable rapid and reliable on-site monitoring of organophosphorus pesticides a novel portable dual-mode biosensor has been developed which integrates electrochemical and colorimetric detection into a single freeze-dried bioactive capsule. This innovative design supports instrument-free operation and provides dual-signal cross-validation. The sensor is based on a newly synthesized Mn/Ce bimetallic metal-organic framework (MOF) nanozyme with high oxidase-like activity, co-immobilized with acid phosphatase (ACP) within a mannitol- and sucrose-stabilized lyophilized capsule to ensure long-term stability and field readiness. In the presence of malathion, the pesticide selectively inhibits ACP, thereby restoring the MOF's catalytic activity and enabling the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). The resulting signal is detected both visually and through chronoamperometry after conversion to a yellow diimine product. This approach achieves a wide linear detection range of 1–2000 nM and an exceptionally low detection limit of 0.06 nM for malathion, along with high accuracy evidenced by recoveries of 93.31%-104.03% in real water samples. This work establishes a field-deployable and user-friendly sensing platform that combines innovative material design with integrated dual-mode detection, offering a robust and practical strategy for on-site environmental monitoring. Graphical
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2026
·
IF 6.7
Guang Yang,Qiang Hu,Haiping Yang,Yang Yang,Hao Jiang,Wei Cheng,Tania Farias,Hanping Chen
Efficient tar conversion is essential for reliable biomass gasification and downstream hydrogen production. Yolk–shell catalysts, which confine active metals within an inert shell, show strong resistance to sintering and carbon deposition during tar reforming, but their catalytic efficiency still requires improvement. In this work, promoter-modified yolk–shell Ni@SiO 2 catalysts incorporating Zr, Ce, and Fe were developed for the steam reforming of toluene as a model tar compound. Among the promoters, Ce showed the most significant enhancement, achieving 100% toluene conversion at 650 °C and a steam-to-carbon ratio of 2, with stable performance maintained for 60 h of continuous operation, outperforming the Fe- and Zr-doped catalysts. Mechanistic studies showed that Ce promotion enhanced both activity and stability. TPD-MS results suggested that the introduction of Ce increased the concentration of oxygen vacancies, which promoted H 2 O adsorption on Ce-related sites while preserving metallic Ni sites for toluene activation. Meanwhile, the cracking and reforming temperatures decreased from 315 °C and 398 °C to 220 °C and 262 °C, respectively. In situ DRIFTS identified benzyl alcohol, benzoic acid, and maleic acid as key surface intermediates. These results demonstrate that combining yolk–shell confinement with Ce-induced oxygen vacancy engineering is an effective strategy for stable tar reforming.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2026
·Vol. 27
·期 12
·5411
·
IF 5.6
Zhaoping Sang,Bowen Tang,Yunhao Zhuo,Lixin Li,Qi Zhang,Yinan Jin,Huiming Zhang,Gang Zhao
Prolonged use of clear aligners promotes bacterial colonization and biofilm formation, which can compromise orthodontic outcomes. There is a clear clinical demand for approaches that can suppress pathogenic activity while preserving the fundamental functional and material characteristics of the aligners. To address this need, a novel strategy of fabricating metal–organic framework (MOF) coatings on aligners was adopted. Metal–organic frameworks (MOFs) have emerged as promising antibacterial coating materials by combining antimicrobial metal ions with biocompatible organic ligands. Three distinct porphyrin-based MOFs (Ag-, Cu-, and Ce-TCPP) were synthesized and fabricated as coatings on clear aligner surfaces via a coordination-driven self-assembly approach. The coated aligners were comprehensively assessed in vitro to determine their antibacterial performance, anti-inflammatory potential, biocompatibility, and key physical characteristics. Among the three coatings, Ag-TCPP showed the most favorable overall antibacterial and anti-biofilm performance in the present experimental system and facilitated macrophage polarization toward an anti-inflammatory M2-like phenotype. Ag-TCPP exhibited a significant inhibition zone of 6.75 ± 0.25 mm and reduced biofilm biomass by 72.2%. All MOF coatings exhibited excellent biocompatibility, and their application did not compromise the aligners’ mechanical integrity or aesthetic properties (light transmittance). This study reports the successful development of a novel metal–organic framework (MOF)-based coating strategy for clear aligners. Among the formulations investigated, the Ag-TCPP coating exhibited outstanding antibacterial and immunomodulatory performance while maintaining the critical mechanical integrity and aesthetic qualities of the aligner. The findings of this work offer a practical approach to designing multifunctional orthodontic devices that may reduce biofilm-related complications and improve clinical outcomes.
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JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Zhengyang Chi,Yonghong Niu,Lin Ma,Yuan Tian,Hao Li
The global transition toward low carbon energy systems has intensified the demand for renewable H 2 and cleaner syngas production. Biomass steam gasification is a promising route, but tar formation and catalyst deactivation still limit its practical application. Herein, Pr 1– x Ce x FeO 3 supported on calcined dolomite was developed for staged biomass steam gasification to couple H 2 production with tar reforming. Statistical screening identifies gasification temperature, Ce substitution level, and steam flow rate as the dominant factors controlling H 2 formation. Under single-factor conditions, Pr 0.6 Ce 0.4 FeO 3 /CD shows the best performance, giving 44.33 vol% H 2 , a total gas yield of 1.51 Nm 3 /kg biomass, a syngas yield of 1.10 Nm 3 /kg biomass, and a syngas fraction of 72.77 vol%. Tar conversion is optimal near 850 °C, where the dry tar yield decreases to 22.75 g/kg biomass, while heavy polycyclic aromatics and >C13 compounds account for 0.79% and 4.14% of the total gas chromatography-mass spectrometry (GC-MS) peak area, respectively. Response surface optimization gives an optimum at 810 °C, x = 0.4, and a steam flow rate of 1.2 mL/min, with an experimental H 2 fraction of 46.22 vol%. Structural and surface analyses indicate that moderate Ce substitution preserves the perovskite framework while regulating defect formation, surface oxygen species, and Fe/Ce/Pr redox behavior. Cycling deactivation is mainly associated with carbonaceous deposits, Fe migration, CaO carbonation, and structural densification. This work provides a feasible perovskite dolomite strategy for integrated tar reforming and production of syngas rich in H 2 from biomass.
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MOLECULES
·
2026
·Vol. 31
·期 16
·2775
·
IF 5.1
Binyu Wang,Cong Feng,Huan Liu
To clarify the role of metal dopants in low-temperature NH3-SCR of NO, FeMnTiOxcatalysts were synthesized by coprecipitation and separately modified with Ce, Co, or W. The catalysts were evaluated for NO conversion, separate O2/H2O switching response and dry-feed time-on-stream stability and characterized by XRD, SEM, N2adsorption–desorption, XPS, H2-TPR and NH3-TPD. Ce doping at Ce/Mn = 0.3 suppressed TiO2crystallization, increased the BET surface area from 136 to 231 m2g−1and the pore volume from 0.19 to 0.58 cm3g−1, raised the Mn4+/Mn3+ratio from 0.70 to 1.25, and increased the medium-strong-acid relative peak area from 555.4 to 1293.2 a.u. FeMnCe0.3TiOxmaintained at least 90% NO conversion from 140 to 360 °C, gave 75% conversion at 400 °C, and averaged 97.4% during a 40 h dry-feed test at 350 °C. The results show that the superior Ce-modified catalyst arises from the combined regulation of texture, surface redox balance and acidity.
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JOURNAL OF CATALYSIS
·
2026
·
IF 6
Denghui Cheng,Yang Gao,Huan Yang,Fuqing Gong,Guohao Yin,Yuyang Luo,Yongqiang Tian,Shuheng Chen,Jingbo Du,Jia Yang,Zhen Huang,De Chen
Ammonia decomposition is an appealing method for on-site hydrogen production, enabling ease of transportation and storage of H 2 . However, the high-temperature and hydrogen-rich environment present a challenge in developing highly efficient and stable catalysts. Hence, this study outlines an exsolution strategy for synthesizing a Ni-based catalyst in intimate contact with CeO 2 . The Ce 10 /NiAl 2 O 4 catalyst exhibits competitive catalytic performance for ammonia decomposition reaction, and achieves a hydrogen production rate of 78.3 mmol g cat −1 min −1 at 550 °C. Importantly, the robust structure of the Ce 10 /NiAl 2 O 4 catalyst ensures that no significant deactivation is observed during the 200-h stability test. HRTEM, XRD, TPD and kinetic studies reveals that the presence of CeO 2 enhances the dispersion of exsolved Ni nanoparticles, modulates the surface basicity of catalyst, reduce the reaction activation energy, promote the desorption of nitrogen/hydrogen species, and subsequently promotes NH 3 adsorption/activation capacity·NH 3 -TPD-MS in combination with in-situ DRIFTS demonstrate that CeO 2 could accelerate the recombination and desorption of N* adatoms, which is the rate limiting step, thereby significantly boosting catalytic performance. Furthermore, the DFT calculations reveal that the interaction between CeO 2 and Ni species facilitates electron transfer toward Ni, lowering the barrier for both N–H dissociation and N* recombination and desorption. This work not only presents an efficient and stable noble-metal-free catalyst for ammonia decomposition to generate hydrogen, but also provide a general strategy to engineer high-performance catalysts applicable to harsh catalytic environments.
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