CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhihua Zhao,Yang Dong,Xianghao Meng,Peijuan Wu,Jichao Wang
The present work focuses on developing a high-performance n-butanol detection system through heterojunction engineering of W 18 O 49 /CeO 2 nanocomposites, aiming to achieve superior sensitivity and selectivity in volatile organic compound monitoring. The solvothermal-mediated fabrication of CeO 2 nanocrystals served as the foundation for hierarchical assembly of the W 18 O 49 /CeO 2 heterostructured sensing layer. A comprehensive investigation was organized, encompassing discriminative selectivity analysis, durability testing, response profiling, response/recovery characterization under prolonged operational conditions. Experiment confirmed that the W 18 O 49 /CeO 2 heterojunction sensor achieved peak analytical performance at room temperature, exhibiting a response of 12.2 when exposed with 100 ppm n-butanol. In contrast, the pristine W 18 O 49 had a response of 2.6, and pristine CeO 2 showed negligible response. DFT results showed that the adsorption energy of n-butanol on the W 18 O 49 /CeO 2 composite was −1.092 eV, which was much stronger than that on pristine W 18 O 49 (−0.305 eV), indicating a more favorable adsorption process. Notably, the sensor achieved a detection threshold of 1 ppm n-butanol with a response magnitude reaching 23.5 %, indicating its capability for ultra-trace gas analysis. Collectively, these findings substantiate the W 18 O 49 /CeO 2 heterojunction architecture as a highly effective sensing platform for volatile organic compound (VOC) detection, with particular applicability to n-butanol gas monitoring in smart manufacturing environments. The superior sensing efficacy stems from the synergistic charge transfer mechanism at the heterointerface, validated by both experimental characterization and theoretical modeling.
研究领域:
材料科学
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气体传感技术
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纳米材料
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环境监测
·
化学传感
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 15
·5930
·
IF 4.6
Xuan Wang,Wei Liang,Changqing Lin,Tie Zhang,Jing Zhang,Nan Sheng,Zhaoning Song,Jie Jiang,Bing Sun,Wei Xu
Propane catalytic oxidation is an important industrial chemical process. However, poor activity is frequently observed for stable C–H bonds, especially for non-noble catalysts in low temperature. Herein, we reported a controlled synthesis of catalyst Co3O4@CeO2–IE via inverse loading and proposed a strategy of oxygen vacancy for its high catalytic oxidation activity, achieving better performance than traditional supported catalyst Co3O4/CeO2–IM, i.e., the T50(temperature at 50% propane conversion) of 217 °C vs. 235 °C and T90(temperature at 90% propane conversion) of 268 °C vs. 348 °C at the propane space velocity of 60,000 mL g−1h−1. Further investigations indicate that there are more enriched oxygen vacancies in Co3O4@CeO2–IE due to the unique preparation method. This work provides an element doping strategy to effectively boost the propane catalytic oxidation performance as well as a bright outlook for efficient environmental catalysts.Keywords:propane catalytic oxidation;inverse loading;oxygen vacancy
研究领域:
化学工程
·
催化科学
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DOI
PubMed
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2020
·Vol. 22
·期 11
·2000402
·
IF 3.217
Yanpeng Xue,Shuqiang Wang,Yanyan Xue,Lili Cao,Mengyan Nie,Ying Jin
Until now, superhydrophobic materials that are scale-up fabrication and application to harsh environments remain challenging because of their fragile mechanical durability. Because of their unique electronic structure, rare-earth oxides (REOs) have been proven to be intrinsically hydrophobic. Herein, cerium oxide particles (CeO 2 ) are added to the coating by coelectrodeposition. The Co–Ni/CeO 2 composite coating from the electrolyte containing 3.44 g L −1 possesses a flower-like hierarchical structure, displaying a superhydrophobic behavior after the modification by 1H,1H,2H,2H-perfluorooctyltrichlorosilane (PFTEOS). More importantly, excellent mechanical durability with critical abrasion distance of 22.5 m is achieved under a 5 kPa fixed normal pressure in the liner abrasion test before the loss of superhydrophobicity. Also, electrochemical measurements demonstrate that the superhydrophobic composite coatings display high corrosion resistance.
研究领域:
材料科学
·
表面工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Hou Chaojie,Xu Hang,Zhang Bingbing,Zhao Yuan,Wu Fengmin
A flower-like core–shell MnO 2 @CeO 2 composite was synthesized via hydrothermal method. Characterization by X-ray diffraction, Brunauer–Emmett–Teller, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy confirmed a micro-spherical morphology with a high specific surface area (266.4 m 2 g −1 ) and well-defined mesoporous structure (average pore size: 7.4 nm), facilitating active site exposure and reactant adsorption. Under optimal conditions (25 mg catalyst, 1.5 mL 25 wt% peroxymonosulfate, 2 mL acetonitrile, 600 ppm initial sulfur, 40℃), the desulfurization efficiency for dibenzothiophene reached 81.26%. It maintained 71% efficiency after 5 cycles, with stable chemical structure and morphology. Quenching experiments confirm that the primary oxidation of dibenzothiophene to dibenzothiophene sulfoxide is predominantly mediated by sulfate radicals (·SO 4 ⁻), while the subsequent oxidation of dibenzothiophene sulfoxide to dibenzothiophene sulfone relies primarily on hydroxyl radicals (·OH). Kinetic analysis showed tandem reaction behavior with rate constants k 1 = 0.213 min⁻ 1 and k 2 = 0.187 min⁻ 1 . This catalyst offers promising potential for industrial production of ultra-low-sulfur fuels. Graphical
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yifei Huang,Hongliang Dai,Zhenzhen Huang,Guanhua Wang,Huaiquan Zhao,Xuliang Pang,Weiqiang Fan,Hongye Bai
Electrocatalytic oxidation of biomass derivative 5-Hydroxymethylfurfural (HMF) to produce 2,5-furandicarboxylic acid (FDCA) is a promising strategy to promote the utilization of renewable energy resource. However, the intrinsic activity of catalysts is still limited by the insufficient configuration of electronic structure. In this work, Mn 3 O 4 /CeO 2 heterostructure with Mn 4+ sites have been successfully constructed for efficient HMF oxidation. CeO 2 not only serves as an active center, but also enhances the affinity of reaction intermediates and adjusts the electronic structure of Mn species (Mn 3+ + Ce 4+ ↔ Mn 4+ + Ce 3+ ). More high-valent Mn 4+ /Ce 4+ sites have been exposed through the electrochemical reconstruction, contributing to 97.95 % FDCA yield and 97.77 % Faraday efficiency (FE) (0.8 V vs Ag/AgCl). Therefore, this work provides a new insight of Mn 4+ for boosting HMF oxidation, which is essential for exploring the efficient catalyst in the field of biomass conversion.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Kewen Ding,Yuchen Wu,Xiaofeng Wei,Xuewei Zhu
This study aims to fabricate chromium-free Zn–Al + CeO 2 composite coatings by integrating CeO 2 nanoparticles into the chromium-free Zn–Al coating solution as a strengthening agent and subsequently applying a wet coating method. The corrosion resistance of the coatings was evaluated through NaCl immersion corrosion tests . The microscopic morphology, composition and electrochemical properties of the composite coatings before and after corrosion were analyzed using SEM and an electrochemical workstation. The corrosion resistance mechanism of the coatings was investigated as well. The results revealed that the CeO 2 nanoparticles were uniformly distributed on the surface of the composite coating and in the gaps between Zn and Al powders, forming micron-sized particles due to the surface energy effect. The composite coating exhibited a minimum corrosion current density of 0.63 μA cm −2 and a maximum corrosion electrochemical reaction resistance of 35321 Ω cm 2 . Additionally, a complex precipitate formed by the reaction of certain Ce elements in the composite coating enhanced the cathodic protection of the coating. Moreover, Ce 3+ reacted with the OH − generated by microelectrochemical corrosion, resulting in the formation of a precipitate that filled in the gaps between Zn and Al powders. Consequently, this process contributed to the formation of a microporous and flocculent coating structure. In conclusion, the incorporation of CeO 2 nanoparticles had a favorable impact on the production of environmentally friendly and corrosion-resistant chromium-free Zn–Al coatings.
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高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Hao Chen,Hui-Bin Huang,Hai-Hong Li,Shui-Zhong Zhao,Li-Dong Wang,Jia Zhang,Sheng-Liang Zhong,Cheng-Feng Lao,Li-Ming Cao,Chun-Ting He
Remodeling the active surface through fabricating heterostructures can substantially enhance alkaline water electrolysis driven by renewable electrical energy. However, there are still great challenges in the synthesis of highly reactive and robust heterostructures to achieve both ampere-level current density hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Herein, we report a new Co/CeO2 heterojunction self-supported electrode for sustainable overall water splitting. The self-supporting Co/CeO2 heterostructures required only low overpotentials of 31.9 ± 2.2, 253.3 ± 2.7, and 316.7 ± 3 mV for HER and 214.1 ± 1.4, 362.3 ± 1.9, and 400.3 ± 3.7 mV for OER at 0.01, 0.5, and 1.0 A·cm–2, respectively, being one of the best Co-based bifunctional electrodes. Electrolyzer constructed from this electrode acting as an anode and cathode merely required cell voltages of 1.92 ± 0.02 V at 1.0 A·cm–2 for overall water splitting. Multiple characterization techniques combined with density functional theory calculations disclosed the different active sites on the anode and cathode, and the charge redistributions on the heterointerfaces that can optimize the adsorption of H and oxygen-containing intermediates, respectively. This study presents the tremendous prospective of self-supporting heterostructures for effective and economical overall water splitting.
研究领域:
材料科学
·
能源化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Huaiwei Zhang,Yifan Chen,Liang Bao,Jing-yuan Ge
The green synthesis process of photocatalytic ammonia production has received more and more attentions. Herein, a Z-scheme heterojunction with all-solid-state structures is constructed, in which carbon dots can act as electron transferring mediators. The photocatalytic measurement shows that the modified photocatalysts exhibit much higher activities, in which the ammonia production rates can reach above 232 µmol·g cal -1 ·h −1 under the light irradiation. The improved catalytic properties can be credited to the significantly increased number of photoinduced oxygen vacancies, the excellent visible-light adsorption abilities and photogenerated electron-hole separation efficiencies for the carbon dots bridged heterostructures. More hydroxyl and superoxide radicals can be simultaneously produced in the composites. This work provides reasonable guidance for applications in photocatalytic ammonia synthesis and a promising construction strategy of efficient Z-scheme photocatalysts.
研究领域:
材料科学
·
化学工程
·
环境科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xuqian Wang,Wendan Zheng,Wenhua Tong,Aimin Zhang,Yongkui Zhang,Yabo Wang
Organophosphorus esters (OPEs) are important chemicals functioning as extractants, plasticizers, flame retardants, solvents, additives, etc., and are also recognized as hazardous organic liquids generated from industrial processes. Herein, we developed a CeO2-catalyzed degradation with simultaneous phosphorus immobilization technology to treat typical OPE solvents. Under the investigated reaction conditions of a temperature of 180 °C, a reaction time of 3 h, and a dosage of ball-milled CeO2 of 19.8 g mL–1 of the OPE, the model pollutant of tributyl phosphate (TBP) was efficiently degraded with phosphorus immobilization efficiency near 100%. Meanwhile, the mineralization efficiency of TBP was also as high as 98%, which was reflected by the chemical oxygen demand change of liquid products. Gaseous products generated from CeO2-catalyzed TBP degradation could also fulfill the requirements of an environmental standard. Further mechanism studies indicated that the surface oxygen vacancy in CeO2 induced the in situ formation of superoxide radicals, which dominated TBP degradation. During catalytic degradation, the P-containing species were mainly immobilized as cerium phosphate, while the hydrocarbon chains of TBP were degraded into small molecules and finally mineralized into inorganic species. The developed CeO2-catalyzed OPE degradation approach was also applicable to aromatic and halogenated OPEs, i.e., tricresyl phosphate and tris(2-chloroethyl) phosphate. This study provided a possible alternative for waste treatment of the waste of OPEs with low environmental risks.
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高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 18
·2545
·
IF 5.3
Lin Li,Qi Li,Dongqing Wang,Yubo Zhang,Fei Li,Yaru Zhang,Tifeng Jiao
The catalytic treatment of wastewater serves as an effective way to solve the problem of water pollution, in which non-homogeneous Fenton catalysts are widely used. However, the activity enhancement of non-homogeneous Fenton catalysts still remains a great challenge. Herein, self-assembled BiFeO3/CeO2nanocatalytic materials with different molar ratios were successfully fabricated by a suspension blending method, following which the structure evolution was determined by various characterizations. The catalytic degradation of methylene blue (MB), rhodamine B (RhB), and saffron T (ST) were performed over the BiFeO3/CeO2nanocatalytic materials. It was found that the 0.2BiFeO3:0.8CeO2nanocatalytic materials exhibited an 80.8% degradation efficiency for RhB. The 0.6BiFeO3:0.4CeO2nanocatalytic materials reached 81.1% and 48.7% for ST and MB, respectively. The BiFeO3/CeO2nanocatalytic materials also showed a good stability during several cycles. The combination of CeO2with BiFeO3led to an enhanced activity for dye degradation, probably due to the electron transfer from ≡Fe2+to ≡Ce4+. This study provides a new approach to dye degradation by using Fenton catalytic systems.Keywords:CeO2;BiFeO3;nanocatalytic materials;non-homogeneous Fenton catalysts;dye degradation
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DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 10
·3091-3102
·
IF 7
Jianping Liu,Guijun Li,Chuanlan Xu,Hongdian Chen,Rong Jin,Lingtao Sun,Chenyang Shu,Haifeng Chen,Chaozhong Guo,Honglin Li,Yujun Si
Non-precious metal Fe–N–C materials are considered one of the promising substitutes for the Pt/C catalyst toward the oxygen reduction reaction (ORR). However, they still suffer from rapid stability reduction caused by the severe Fenton reaction in the ORR process. Here we report a supramolecular-gel-pyrolysis (SGP) method to design a non-noble CeO2/Ce-N–C composite with a hierarchically porous carbon sheet-network structure, serving as an efficient Ce single-atom-site (Ce-N4O4) catalyst for the ORR in a zinc–air battery (ZAB). The prepared catalyst displays comparable ORR catalytic activity and stability to those of Pt/C in an alkaline electrolyte. The corresponding ZAB tests also show a higher energy density and better long-term cycling durability. Theoretical calculations indicate that the enhanced ORR activity may be attributed to the fact that the presence of oxygen vacancies and the Ce-N4O4|CeO2 coupling sites can largely favor the chemical adsorption and activation of O2. This work provides a new avenue for exploring rare-earth metal single-atom ORR electrocatalysts with coupled ORR catalytic sites.
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高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 15
·4489-4497
·
IF 5
Kewu Yang,Ke Wang,Xianfeng Shen,Fanxing Zhang,Bei Huang,Keping Yan,Yao Shi,Yi He,Pengfei Xie
The exposed facets of ceria crystals have a profound effect on the reactivity of ceria-supported catalysts owing to the intricate metal–support interactions. In this work, ceria nanorods, nanocubes, and polyhedra, with corresponding exposed (110)/(100), (100), and (111) terminations, were hydrothermally synthesized to support Pd species, with the aim of investigating the in-depth impacts of ceria crystal facets for methane combustion over ceria-supported palladium catalysts. The nanorod sample delivered the highest methane conversion (T50 = 277 °C, GHSV = 200 000 mL h−1 gcat−1) and greater reaction rate (9.59 × 10−4 molCH4 h−1 gcat−1), 1.23 times that of nanocubes and 3.14 times that of polyhedra. Further characterizations revealed that on the (110)/(100) surface planes, PdOx exhibited stronger interactions with CeO2. This led to enhanced formation of Pd4+ and higher reducibility of PdOx species, thus promoting methane activation. This work would supply experimental insights into the relationship between exposed facets and reactivity, as well as guidance for rational catalyst design.
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