ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 28
·期 48
·69301-69313
·
IF 4.223
Xiao
Ruyi,Zhang Yuanyuan,Wang Shuangfei,Zhu Hongxiang,Song Hainong,Chen Guoning,Lin Hongfei,Zhang Jian,Xiong Jianhua
The heterogeneous photo-Fenton-like process is emerging as a promising treatment of antibiotics-containing wastewater. The preparation of new efficient and stable catalysts is one of the research fields. A composite catalyst, prussian blue (PB) modified CeO 2 was prepared, characterized, and applied for photo-Fenton oxidation of norfloxacin (NOR) in this study. It was found that chemical doping of PB leaded to more oxygen vacancies and increased the surface area of CeO 2 obviously. PB/CeO 2 with more Ce 3+ facilitated electron transfer between Fe 3+ /Fe 2+ with Ce 3+ /Ce 4+ . PB could also improve the separation rate of photoexcited electron-hole pairs in CeO 2 nanostructures. When the doping ratio of PB and CeO 2 was 10%, PB/CeO 2 show the highest catalytic degradation ability and 88.93% of NOR could be degraded within 30 min. PB/CeO 2 composite showed well reactivity at the wide pH value range of 3–8. The reusable experiments and low iron dissolution with less than 1 mg/L indicated that PB/CeO 2 could be employed as an efficient heterogeneous photo-Fenton-like catalyst in organic contaminants degradation.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Guangyu Zhu,Fuyan Kang,Xiaoya Ding,Chunxiao Yin,Fa-Qian Liu
Biofouling has been a persistent challenge for offshore equipment, significantly affecting its longevity. In this study, two-dimensional (2D) ZIF-7 nanosheets were synthesized via a hydrothermal method and modified with polydopamine (PDA) to enhance their dispersibility. A multifunctional ZIF-7@PDA-CeO2 nanocomposite was then prepared through in situ growth, where CeO2 was uniformly and securely anchored onto the ZIF-7@PDA surface, facilitated by the large specific surface area and its electrostatic interactions between ZIF-7@PDA. UV–vis absorption spectra demonstrate that the ZIF-7@PDA-CeO2 exhibit haloperoxidase-like (HPO-like) catalytic activity, efficiently catalyzing the oxidation of NH4Br and H2O2 to generate HBrO. Antibacterial assays indicate that ZIF-7@PDA-CeO2 possesses strong bactericidal activity and effectively inhibits biofilm formation. Furthermore, ZIF-7@PDA-CeO2 are used as fillers to prepare ZIF-7@PDA-CeO2/EP composite coating, and the antibacterial and long-term corrosion resistance is also explored. We believe this work offers a sustainable solution to the challenges of biofouling and corrosion in marine environments.
研究领域:
材料科学
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海洋工程
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生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Chenjing Xu,Jinpo Xie,Lian Yu,Bin Shu,Xiaogang Liu,Siping Chen,Qinglan Li,Shaohai Qi,Suqing Zhao
Vibrio vulnificus infection caused by contaminated aquatic products and seawater can lead to severe disease and high mortality. The development of a rapid and sensitive detection method for Vibrio vulnificus is vital to effectively prevent infection in advance. In this study, CeO 2 @PtRu with high peroxidase activity was used to construct a colorimetric immunoassay for Vibrio vulnificus detection by conjugating polyclonal antibodies via the biotin-streptavidin system. The developed colorimetric biosensor for Vibrio vulnificus demonstrated rapid operability and good sensitivity with a detection range from 10 4 CFU/mL to 10 9 CFU/mL, and the limit of detection (LOD) is 193 CFU/mL. Moreover, the colorimetric biosensor showed excellent specificity and good recoveries from 98.70% to 102.10% with RSD < 7.45% for spiked real samples. This novel CeO 2 @PtRu-based colorimetric biosensor has great application potential for the sensitive detection of Vibrio vulnificus in seafood.
研究领域:
微生物学
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免疫学
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生物传感技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhixiu Yang,Xiaoxuan Guo,Yong Chen,Lijing Gao,Ruiping Wei,Xiaomei Pan,Guomin Xiao
Despite significant advancements in the investigation of catalyst morphology in electrochemical CO 2 reduction (ECR), achieving precise control over multi-carbon (C 2+ ) products selectivity remains challenging. Thus, a sequence of catalysts with incorporation of CuO onto three-dimensional (3D) spherical CeO 2 were synthesized using a hydrothermal and calcination two-step method. The molar ratios of Cu(NO 3 ) 2 ·H 2 O to Ce(NO 3 ) 3 ·6H 2 O can manipulate morphology and oxygen vacancies (O v ) of Cu x Ce y catalysts, further influencing their product distribution in ECR . Materials characterization and electrochemical testing demonstrate that dual effects of spherical morphology and O v in the Cu x Ce y catalysts can enhance the activity and C 2 H 4 selectivity in ECR . To elaborate further on the topic, the pure CeO 2 exhibits excellent Faradaic efficiency (FE) of CH 4 with the value of 54.3 %. Cu 7 Ce 3 , among all Cu x Ce y catalysts, reaches a maximum value of 37.22 % at −1.2 V vs. RHE, possibly attributed to its highest O v concentration. More significantly, the possible reaction pathway was monitor by ATR-FTIR technique for Cu x Ce y during ECR is: CO 2 → *COOH →*CO → *CHO → *OCCOH → C 2 H 4 . The concept of dual tuning strategy by morphology and O v opens up a wide range of possibilities for the development of effective Cu-based catalysts for ECR.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Shiwei Ma,Shiyi Chen,Huijun Ge,Tao Song,Ping Lu,Wenguo Xiang
CeO2 is a typical fluorite oxide with desirable lattice oxygen conductivity and can be applied as an active support for the Fe-based oxygen carrier in chemical looping hydrogen generation (CLHG). However, Fe2O3/CeO2 always suffers from low thermal stability and sintering. Doping foreign cations could be a proper way to improve its reactivity and cyclic stability. In this work, Zr4+ and Sm3+, with a smaller ionic radius and lower valence than Ce4+, respectively, were doped into Fe2O3/CeO2 using the co-precipitation method, and the doping effects on the reactivity and redox stability of Fe2O3/CeO2 in CLHG were investigated. Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 provided the best redox reactivity, and the purity of generated hydrogen for all oxygen carriers reached nearly 100% (the detection limit of CO/CO2 was 0.01% in volume). The reactivity followed the sequence Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 > Fe2O3/Ce0.8Sm0.2O1.9 > Fe2O3/Ce0.75Zr0.25O2 > Fe2O3/CeO2. However, the concentration of oxygen vacancy was ranked as Fe2O3/Ce0.8Sm0.2O1.9 > Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 > Fe2O3/Ce0.75Zr0.25O2 > Fe2O3/CeO2. The Zr doping boosted the reactivity of Fe2O3/CeO2 mainly by enhancing its sintering resistance, whereas the Sm doping achieved it mainly by promoting the oxygen conductivity, whose ability to improve the thermal stability of Fe2O3/CeO2 was rather limited. Both Zr and Sm doping could suppress the outward migration of Fe cations in the particles, resulting in higher sintering resistance. Furthermore, Zr and Sm could dissolve into CeO2 for prepared Fe2O3/Ce0.6Sm0.15Zr0.25O1.925; however, the bleeding out of both dopants was observed with Sm0.5Zr0.5O1.75 formation, which could be detrimental to the redox stability of the oxygen carrier.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yanan Wei,Tao Xia,Tongyu Zhong,Henghui Zhu,Yucai He,Yunlei Zhang
Interface engineering is a significance strategy to afford efficient selective oxidation for supported catalysts. Herein, constructing of frustrated Lewis pairs (FLPs) sites on CeO 2 and supporting Au-Pd nanoparticles to provide a highly selective production of 2,5-furandicarboxylic acid (FDCA) from 2,5-bis(hydroxymethyl)furan (BHMF). Mechanism investigations illustrate that the FLPs active sites enhance the adsorption and activation of catalyst for BHMF, decreasing the activation energy of rate-determining step. Simultaneously, the FLPs sites induce the electron transfer of the catalyst, generating a novel Au-Pd-CeO 2 interface that promotes the adsorption of molecule oxygen and the formation of the superoxide radical. Thereby, the Au x Pd y /P T -CeO 2 catalysts enable superior catalytic performance, achieving a satisfactory turnover frequency of 55.29 h −1 and a highly FDCA yield of 94.0 %. Such interfacial FLPs sites exhibit the great potentials for the selective oxidation of various unsaturated compounds.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 11
·1-17
·
IF 2.8
Pan Deng,Wang Yanan,Lin Liwei,Zhang Yuzhe,Zhou Man,Li Zhongyu,Xu Song
Photothermal catalytic CO 2 reduction can combine photocatalysis and thermal catalysis by using full-spectrum solar energy to convert CO 2 into high value-added chemicals. This can effectively alleviate the problems of excessive CO 2 emissions and thermal catalytic energy waste. In this paper, a novel catalyst was prepared using Ce-MOF as a precursor to generate Cu/Ni/CeO 2 for efficient reduction of CO 2 to CO by hydrogenation. Due to the rod-like structure of CeO 2 and the high dispersion of Cu and Ni nanoparticles, 10%Cu 5%Ni CeO 2 can achieve a catalytic activity of 54.21 mmol g −1 h −1 in the full solar spectrum. The supported Cu and Ni metals are the active sites for catalytic reduction. Meanwhile, Cu and Ni enhanced the light absorption ability of the catalyst and the surface temperature under illumination. This is due to the hot charge carriers generated by LSPR effect in Ni and Cu metal nanoparticles, which can dissipate energy through local heating, thus increasing the temperature of the catalyst under illumination. It can be found that the CO 2 reduction activity of photo-assisted thermocatalysis is higher than that of thermal catalysis under the same conditions. Therefore, the combined effect of the electrons generated by UV–Vis light and the heating effect of near-infrared light on catalyst could improve the catalytic activity. This work might provide a potential strategy for efficient photothermal reduction of CO 2 in the future.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 19
·6953
·
IF 3.748
Yaohui Xu,Pingkeng Wu,Mingjin Wu,Yuehe Gu,Hongguang Yu,Zhao Ding
Pr-doped CeO2with different doping levels was prepared from Ce(NO3)3∙6H2O and Pr(NO3)3∙6H2O by solvothermal method without any additional reagents, in which the mixed solution of ethylene glycol and distilled water was employed as a solvent. The influences of Pr-doping on phase composition, crystal structure and morphology were investigated, as well as Pr valence and oxygen vacancy defects. The Pr cations entered into the CeO2crystal lattice with normal trivalence and formed a Pr-CeO2solid solution based on the fluorite structure. The larger trivalent Pr was substituted for tetravalent Ce in the CeO2crystal and compensated by oxygen vacancy defects, which caused the local lattice expansion of the crystal lattice. Moreover, the Pr-doped CeO2solid solutions exhibited visible color variation from bright cream via brick red to dark brown with the increasing of Pr contents. The degradation of AO7 dye was also investigated using a domestic medical ultraviolet lamp; the removal efficiency of AO7 by 1% and 2% Pr-doped CeO2approached 100%, much higher than 66.2% for undoped CeO2.Keywords:CeO2;Pr-doping;photocatalysis;pollutant degradation;mesoporous structure
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Qiguang Dai,Zhiyong Zhang,Jiaorong Yan,Jinyan Wu,Grayson Johnson,Wei Sun,Xingyi Wang,Sen Zhang,Wangcheng Zhan
Tuning the nature and profile of acidic and basic sites on the surface of redox-active metal oxide nanostructures is a promising approach to constructing efficient catalysts for the oxidative removal of chlorinated volatile organic compounds (CVOCs). Herein, using dichloromethane (DCM) oxidation as a model reaction, we report that phosphate (POx) Brønsted acid sites can be incorporated onto a CeO2 nanosheet (NS) surface via an organophosphate-mediated route, which can effectively enhance the CeO2’s catalytic performance by promoting the removal of chlorine poisoning species. From the systematic study of the correlation between POx composition, surface structure (acid and basic sites), and catalytic properties, we find that the incorporated Brønsted acid sites can also function to decrease the amount of medium-strong basic sites (O2–), reducing the formation of chlorinated organic byproduct monochloromethane (MCM) and leading to the desirable product, HCl. At the optimized P/Ce ratio (0.2), the POx–CeO2 NSs can perform a stable DCM conversion of 65–70% for over 10 h at 250 °C and over 95% conversion at 300 °C, superior to both pristine and other phosphate-modified CeO2 NSs. Our work clearly identifies the critical role of acid and basic sites over functionalized CeO2 for efficient catalytic CVOCs oxidation, guiding future advanced catalyst design for environmental remediation.
研究领域:
环境科学
·
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Pingping Xie,Xin Yong,Yongdan Li,Shetian Liu,Cuijuan Zhang
The 5%BaCoO 3 -CeO 2 catalysts show excellent catalytic performance for NO direct decomposition; however, the reasons for the high activity remain to be explored. Here, the catalyst was prepared by different methods (citric acid–nitrate one-pot method, impregnation method and mechanical mixing method), aiming to reveal the factors determining the catalytic activity. The results show that the one-pot derived materials display superior activity and oxygen resistance, which is stemmed from the smaller grains and uniform distribution of components, higher surface area, larger interface, better redox activity, faster oxygen desorption kinetics and better NO sorption capability. The catalytic mechanism was discussed based on the diffuse reflectance infrared Fourier transform spectroscopy and kinetic study . This work demonstrates that the one-pot method is promising to synthesize high performance heterogeneous catalysts and the derived 5%BaCoO 3 -CeO 2 is a competitive candidate for NO direct decomposition.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2024
·
IF 5.2
Lan Zhang,Xiaomin Hu,Ning Wang,Biaohua Chen
The escalating emission of CO 2 has caused a significant environmental impact. Hydrogenation of CO 2 to methanol stands as the primary objective in the liquid sunlight vision, aiming to mitigate CO 2 emissions. CuZn-based transition metal catalysts, known for their cost-effectiveness, demonstrate commendable catalytic performance at moderate temperatures and pressures, showcasing considerable potential in industrial applications. Consequently, a series of catalysts, composed of CuZn-based species supported on CeO 2 with strategically introduced appropriate oxygen vacancies, were meticulously prepared. It worth to noting that the size of Cu was precisely tuned, along with the enhanced ability to the adsorption and activation of CO 2 and H 2 . As a result, the optimal CuZn/CeO 2 catalyst exhibits high methanol formation rate, recording at 433.4 g MeOH kg cat −1 h −1 with selectivity of 68.5% at 260 °C and 3 MPa. Simultaneously, the reaction path and the evolution of intermediates in CO 2 hydrogenation was thoroughly delineated.
研究领域:
催化化学
·
环境科学
·
能源化学
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2024
·
IF 3.8
Siyang Yan,Ruilin Feng,Jiaxu Liu,Chenxi Bai,Yanlong Qi
Graphical The dehydration of 2,4-pentanediol to unsaturated alcohol was performed over ceria-based catalysts with high selectivity. A stereocatalytic effect of CeO 2 catalyst was observed for the production of trans -3-penten-2-ol, with negligible content of cis -3-penten-2-ol. The transformation of biobased alkanediols over heterogeneous catalysts is a major object. Here, a series of catalysts were prepared for 2,4-pentanediol dehydration to 3-penten-2-ol. Ceria-based catalysts had a unique property of showing high efficiency. More importantly, a stereocatalytic effect was observed for CeO 2 , yielding trans -3-penten-2-ol with a high selectivity. Raman, XPS, TPD, and TPR were carried out to clarify the catalyst structure, and the relationship between the catalyst structure and catalytic performance were studied. The amount of Lewis acid sites can hardly be correlated with the total concentrations of the oxygen vacancies. It was suggested that the geometry structure of the active sites played a crucial role in trans -3-penten-2-ol production. The oxygen vacancies originating from CeO 2 consisted of active sites with a geometrical structure, which were different from those created by Pr doping CeO 2 . In addition, the Pr doping enhanced the oxygen migration, which resulted in side reactions, consequently, giving a lower selectivity to trans -3-penten-2-ol.
研究领域:
催化化学
·
材料科学
·
绿色化学
✓ 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）