APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Xinyu Han,Kaijie Liu,Mengyao Bian,Zhaoxu Yuan,Yannan Li,Yunlong Zhang,Xiangguang Yang,Yibo Zhang
Despite SO 2 being recognized as a catalyst poisoning substance, a trace amount can enhance the acidity of the NH 3 -SCR (selective catalytic reduction) catalyst, which facilitates NH 3 adsorption and accelerates the reaction rate according to the Eley-Rideal mechanism. In this study, monoatomically dispersed Ce atoms were doped into the MoTiO x lattice to regulate the quantity and distribution of sulfate. This regulation was achieved by leveraging the stronger affinity of SO 2 to Ce, thus maximizing the acidifying effect of SO 2 to boost the NH 3 -SCR performance of the catalyst. The catalyst demonstrated the ability to maintain over 80 % NO x conversion for at least 144 hours in the presence of high concentration SO 2 (250 ppm). A detailed examination of the surface dynamics after SO 2 introduction revealed that NH 4 (SO 4 ) 2 , formed on the surface, converted to NH 4 HSO 4 . The decomposition of NH 4 HSO 4 extracted lattice oxygen from the catalyst, leading to an increase in oxygen vacancies on the catalyst surface as the duration of SO 2 exposure increased. The surface-adsorbed oxygen, brought about by these oxygen vacancies, was readily activated, which promoted the dehydrogenation process of NH 3 and the progression of NH 3 -SCR. Further, based on the discovery of the unique phenomenon and mechanism of NH 4 HSO 4 decomposition that generates oxygen vacancies, gases containing poisonous SO 2 were utilized for the pretreatment of the catalyst to optimize its surface and enhance its sulfur resistance (fighting poison with poison). The results demonstrated that the pretreated catalyst rapidly achieved optimal NO x conversion and maintained catalytic stability for over 240 h even in the presence of 250 ppm SO 2 without any decrease in activity. This research innovatively leveraged the poisonous SO 2 to optimize the catalyst's surface, thereby achieving higher catalytic performance and sulfur resistance, which offers valuable insights into the design of novel sulfur-resistant catalysts.
研究领域:
催化化学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Zijun Huang,Xiaohua Cao,Huaiyu Xu,Miao Lin,Dedong He,Dingkai Chen,Jichang Lu,Yongming Luo
Methyl mercaptan (CH 3 SH) is notorious for global air pollution owing to its odorous characteristics and adverse health effects. Although CeO 2 is currently regarded as a promising catalyst for CH 3 SH decomposition, the high conversion temperature followed by high energy consumption is still a bottleneck. Herein, the cobalt-doped CeO 2 catalyst was synthesized by a facile one-pot preparation strategy and successfully reduces the decomposition temperature from 450 to 250 °C. Further studies demonstrate that the excellent low-temperature catalytic activity of Co 0.6 Ce 0.4 O 2– σ is attributed to its abundant oxygen vacancies and reactive oxygen species. Oxygen vacancies promote the adsorption and dissociation of CH 3 SH, while reactive oxygen species facilitate the decomposition of CH 3 SH. Moreover, Co acts as a sacrificial agent for the adsorption of sulfur species in CH 3 SH, while Ce is responsible for the adsorption and activation of CH 3 SH as the active metal phase. Furthermore, the migration and transformation mechanism of CH 3 SH on the surface of Co 0.6 Ce 0.4 O 2– σ was determined via in situ diffuse reflectance infrared Fourier transform spectra ( in situ -DRIFTS). This work provides a new strategy to synthesize high-performance catalysts for decomposing sulfur-containing volatile organic compounds (VOCs) at low temperatures, which is beneficial to decreasing the energy consumption.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2024
·
IF 5.3
Yanli Deng,Lutong Li,Long Wang,Na Wu,Huihui Jin,Feng Gao,Zhihui Zeng
W-type ferrites possessing low cost and high chemical stability, show high potential in electromagnetic wave (EMW) absorption field. However, due to the low dielectric loss, developing high EMW absorption performance of W-type ferrites remains desired. Here, rare earth (RE) cerium (Ce)-doped W-type barium ferrites (Ba 1-y Ce y Ni 2 Fe 15.4 O 27 , y=0.1, 0.2, 0.3, 0.4, 0.5, 0.6) are prepared by a sol-gel approach. The influences of Ce doping are detailed analyzed. Ce ions with unpaired 4f electrons and strong spin-orbit coupling of angular momentum enhance the dielectric and magnetic properties of ferrites. Ba 0.7 Ce 0.3 Ni 2 Fe 15.4 O 27 achieves the minimum reflection loss (RL min ) value of -52 dB while Ba 0.6 Ce 0.4 Ni 2 Fe 15.4 O 27 showcases the widest effective absorption bandwidth (EAB) of 1.36 GHz associated with the RL min reaching -38 dB, significantly outperforming the undoped ferrites. This work thus demonstrates a high-efficiency utilization of Ce for enhancing the EMW absorption performance of widely employed W-type barium ferrites, efficiently advancing the application field of RE elements.
研究领域:
材料科学
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电磁学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2025
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IF 4.2
Wenjun Zhang,Mingwei Zhang,Linlin Liu,Songzu Tang,Li Wang,Xiangwen Zhang,Guozhu Li
Preparation of robust catalysts with high isomer yield still poses challenges for efficient hydroisomerization of long-chain n-alkanes. ZSM-48 is a competitive candidate for a support due to its unique one-dimensional pore structure. However, its excessive acidic sites lead to serious cracking side reactions. Herein, a facile one-pot in situ method of trace cerium doping in ZSM-48 is developed, and the acidity property and structure of ZSM-48 are finely tuned by changing the Ce content. Compared with traditional ZSM-48, Ce-doped ZSM-48 has smaller specific surface area and microporous volume, and the concentration of strong Brønsted acid sites is effectively adjusted. Pearson correlation coefficients between the properties of ZSM-48 zeolite regulated by different amounts of Ce and the catalytic hydroisomerization performance of Pt/ZSM-48 are calculated, which demonstrate that strong Brønsted acid sites of ZSM-48 are significantly correlated with n-hexadecane isomerization yield. ZSM-48 doped with 0.41 wt% Ce with appropriate concentration of Brønsted acid sites shows superior hydroisomerization performance, reaching an iso-hexadecane yield of 87.0%.
研究领域:
催化化学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
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2025
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IF 2.5
Zhao Chun-Yan,Hu Xiu-Li,Zhou Wei
Calcium looping represents a high-temperature method designed to capture CO 2 , making it appropriate for CO 2 capture from flue gases post-combustion in power plants after combustion or for integration with fuel transformation techniques in pre-combustion CO 2 sequestration systems. This method employs solid sorbents of CaO sourced from natural limestone, leveraging the chemical interaction of CaO with CO 2 , which ultimately results in the formation of CaCO 3 , thereby facilitating effective CO 2 capture. In this research, multiple metal-incorporated CaO-based sorbents were produced through the sol–gel method. Notably, the CaO-based sorbent with a Ca/Ce doping ratio of 15 demonstrates exceptional CO 2 capture ability and stability, maintaining 13.20 mmol/g of CO 2 adsorption capacity after 20 carbonation/calcination cycles. Various characterization techniques, including X-ray diffraction (XRD), N 2 physisorption, scanning electron microscopy (SEM), high-angle annular dark field scanning transmission electron microscopy/energy dispersive spectroscopy (HAADF-STEM/EDS), temperature-programmed-desorption with CO 2 (CO 2 -TPD), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) are employed to demonstrate that the presence of nanoscale CeO 2 significantly enhanced the diffusion of CO 2 during the adsorption process.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
You Zhang,Kun Zhao,Haoyu Zhu,Qiong Xi,Nian Fu,Dawei Wang,Jinxing Zhao,Li Guan,Yunfei Zhuang,Xu Li
White light-emitting diodes (WLEDs) have emerged as a leading technology for healthy lighting and advanced displays. Nevertheless, the poor thermal stability of blue-emitting components remains a significant bottleneck, hindering their broader adoption in demanding environments. Here, we have prepared a series of Ca 3 Al 2 O 6 :Ce 3+ phosphors by high temperature solid-state method. Substituting the [Al 3+ –O 2- ] ionic pair with [Si 4+ –N 3- ] in the Ca 3 Al 2 O 6 host lattice via a charge-compensated strategy achieves a 1.75 times enhancement in thermal stability compared to the pristine material, while simultaneously inducing a blue-shifted emission spectrum (Δλ = 30 nm). The enhanced thermal stability originates from increased lattice rigidity, while the blue spectral shift arises from modulated crystal field splitting decrease. These mechanistic insights provide a foundational strategy for designing ultra-stable blue phosphors compatible with high-power WLED applications.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2018
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IF 4.427
Yang Wang,Baoyu Gao,Shuya Li,Bo Jin,Qinyan Yue,Zhining Wang
Cerium oxide (CeO 2 ) nanoparticles (NPs) have indicated great potentials as nanofiller owing to its high surface area, antioxidant properties and low cost. In this paper, thin film nanocomposite (TFN) RO membranes were proposed to be prepared through incorporation of hydrophilic CeO 2 NPs in polyamide (PA) selective layers via interfacial polymerization (IP). EDX, XPS , SEM , AFM, contact angle and zeta potential were used to examine the property and morphology of the prepared membranes. CeO 2 NPs were successfully embedded in the PA network, which endowed the TFN membranes with rougher surfaces and thinner PA layers. The TFN membranes were fabricated with different CeO 2 NPs contents (0, 50, 100, 150, 200, 400 mg/L). With increasing CeO 2 NPs loading amount, the hydrophilicity improved from 85.4° to 65.7° and the surface charge declined from −19.4 to −34.2 mV. These characteristics contributed to a 50% enhancement in water flux of TFN-CeO 2 100 membrane (containing 100 mg/L of CeO 2 NPs) without compromise the NaCl rejection (98%). Moreover, CeO 2 embedded membrane exhibited an enhanced fouling resistance property through preventing the adhesion of hydrophobic foultants. This study demonstrated the desirable applicability of CeO 2 NPs in synthesizing novel TFN membranes for desalination application.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2020
·Vol. 26
·期 25
·5654-5661
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IF 4.857
Xiao-Yi Song,Yu-Hang Zhang,Ping-Ping Sun,Jun Gao,Fa-Nian Shi
Graphical Expanded capacity : Three Ln−Li metal–organic frameworks (MOFs; Ln=Ce and Pr) were successfully designed and structurally characterized. The unique electrochemical performances of Ln−Li MOFs lead to promising applications as next-generation electrode materials for lithium-ion batteries. Novel lithium–lanthanide (Ln: cerium and praseodymium) bimetallic coordination polymers with formulas C 10 H 2 LnLiO 8 (Ln: Ce (CeLipma) and Pr (PrLipma)) and C 10 H 3 CeO 8 (Cepma) were prepared through a simple hydrothermal method. The three compounds were characterized by means of FTIR spectroscopy, X-ray diffraction, single-crystal X-ray diffraction, SEM, TEM, and X-ray photoelectron spectroscopy. The results of structural refinement show that they belong to triclinic symmetry and P space group with cerium (or praseodymium) and lithium cations, forming coordination bonds to oxygen atoms from different pyromellitic acid molecules, and leading to the construction of 3D structures. It is interesting to note that the frameworks exclude any coordination water and lattice water. As an electrode material for lithium-ion batteries, CeLipma exhibits a maximum capacity of 800.5 mAh g −1 and a retention of 91.4 % after 50 cycles at a current density of 100 mA g −1 . The favorable electrochemical properties of the lanthanide coordination polymers show potential application prospects in the field of electrode materials.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Gongyu Wen,Zhihao Shi,Yulei Sui,Bingjue Wang,Xiaoping Zhang,Ziwei Zhang,Ling Wu
Rechargeable lithium-sulfur (Li-S) batteries with environmental friendliness , low price, high specific capacity and energy density could be promising alternatives to a larger scope of energy storage in the near future. However, the practical application is impeded by the intrinsic insulation of sulfur and the fatal shuttle effect during the (dis)charging process. Herein, we report a strategy to address the drawbacks of Li-S batteries by inserting an interwoven carbon nanotubes/cerium dioxide electrocatalyst interlayer material (CNTs@CeO 2 ) between the sulfur cathode and the separator. In the CNTs@CeO 2 composite, the conductive network interwoven by CNTs facilitates electron transportation, and the abundant active sites in CeO 2 cavities ensuring the adsorption-catalytic conversion of lithium polysulfides as well as the hollow structure of CeO 2 is conducive to rapid electrolyte penetration and lithium ion migration. Benefiting from such multifunction, the battery with a CNTs@CeO 2 interlayer exhibits superior rate performance, delivering a high discharge specific capacity of 1040.6 mAh g −1 at 0.2C and 652.5 mAh g −1 at 4C, respectively. Moreover, the battery shows excellent cycling stability with a capacity decay rate of 0.064% per cycle at 1C over 1000 cycles. These promising results demonstrate the potential application of CeO 2 -based electrocatalysts for high energy density Li-S batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2024
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IF 8.4
Jie Peng,Jie Jiang,Shuoguo Yuan,Pengfei Hou,Jinbin Wang
Ferroelectric materials are ideal for self-powered sensors in Internet of Things (IoT) and high-precision detection systems due to their excellent polarization properties. Compatibility with miniaturization, high-density systems, and complementary metal oxide semiconductor (CMOS) processes is crucial for their widespread adoption. HfO 2 -based ferroelectric films show potential in self-powered pyroelectric sensors as their thinness enables effective temperature and light detection. However, the disordered ferroelectric domain distribution limits their pyroelectric performance and hampers the development of highly integrated self-powered pyroelectric devices. This report investigates the temperature and light detection capabilities of Ce-doped HfO 2 ferroelectric films, which exhibit as-grown spontaneous polarization in the downward direction, making them a promising option for self-powered pyroelectric sensors. The findings provide robust evidence that the introduction of a temperature gradient significantly enhances pyroelectricity. In addition, their applications in the detection of hot/cold wind and breathing have been proved. Notably, the 30 nm thick Ce-doped HfO 2 ferroelectric film has a high pyroelectric coefficient of about 894.7 μC·m −2 ·K −1 and enables high-precision detection of changes in temperature of 0.1 K. This study highlights the potential application of HfO 2 -based ferroelectric films in self-powered sensors with temperature and light detection capabilities, making them a promising candidate for future IoT-based systems and high-precision detection systems.
研究领域:
材料科学
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传感器技术
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物联网
✓ 已验证
DOI
高影响因子
Green Processing and Synthesis
·
2022
·Vol. 11
·期 1
·184-194
·
IF 3.97
Qiuyun Zhang,Binbin Yang,Yuanyuan Tian,Xianju Yang,Rongfei Yu,Jialu Wang,Taoli Deng,Yutao Zhang
In the present study, a facile solvothermal method was used for the synthesis of silicotungstic acid (HSiW) immobilized on Ce-based metal organic framework (Ce-BDC) and embedded in Zr-based metal-organic framework (UiO-66(Zr)) composite catalyst, namely, Ce-BDC@HSiW@UiO-66 for the production of biodiesel through green fatty acid esterification. The obtained hybrids were characterized by various characterization technologies, including Fourier transform infrared, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N 2 physisorption, X-ray photoelectron spectroscopy, and temperature-programmed desorption of NH 3 (NH 3 -TPD) analysis. The characterization analyses showed that the hybrids have been successfully synthesized. Also, the volume and pore size of UiO-66(Zr) were changed by introducing HSiW@Ce-BDC, and the resulting Ce-BDC@HSiW@UiO-66 possessed the mesoporous structure and relatively high surface area. Simultaneously, the NH 3 -TPD analysis of Ce-BDC@HSiW@UiO-66 reveals that the acid strength was increased in comparison with HSiW@Ce-BDC. In addition, the composite Ce-BDC@HSiW@UiO-66 demonstrated high catalytic activity, and the oleic acid esterification gave 81.5% conversion at optimum conditions of 0.2 g catalysts, 1:30 oleic acid to methanol molar ratio at 130°C for 4 h. More interestingly, after six recycling cycles, the reduction in the conversion rate was only 4.6%, indicating that Ce-BDC@HSiW@UiO-66 has excellent reusability. Our study provides an effective approach to synthesize multifunctional hybrids for green biofuel production.
研究领域:
化学工程
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催化材料
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可再生资源
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Fan Wang,Fansheng Zeng,Zhongyang Yu,Chaoyi Chen,Xuelong Huang,Wei Zhang,Yuanpei Lan,Junqi Li
Aimed to evaluate the influence of nitrogen doping on the photocatalytic performance of ceria, three ceria samples, including nitrogen doped, rich oxygen vacancies contained and contrastive ceria were prepared from the decomposition of CeCO 3 OH under varied atmospheres. The physico-chemical characterizations and photocatalytic properties towards methylene blue (MB) and tetracycline (TC) of the obtained ceria were comparatively discussed in detail. Nitrogen-doped CeO 2 exhibited significantly superior photocatalytic activities compared to CeO 2 with rich oxygen vacancies for MB and TC photodegradation, which is mainly attributed to the significantly enhanced separation of photo-generated carriers ( e − / h + ). Density Functional Theory (DFT) simulation suggests that the introduced impurity states of N-doped CeO 2 advance the formation and separation of e − / h + . Moreover, the electrons are simultaneously excited from N 2 p and O 2 p , which further elevates the carrier concentration on the nitrogen-doped CeO 2 , and promotes the effect of e − during the photodegradation. The obtained results offer powerful evidences for the significant enhancement on photocatalytic performances of nitrogen doped CeO 2 .
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
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