Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Guohua Dong,Linlin Dong,Kun Lang,Dongfeng Chai,Dongxuan Guo,Jinlong Li,Ming Zhao,Shijie Chen,Wenzhi Zhang
At present, the development of high-efficient electrocatalyst is still of great urgency for efficiently eliminating the refractory antibiotics. Herein, a novel Ti/FeTiO 3 /Ce-PbO 2 laminated electrode (TFCP) is firstly constructed via introducing FeTiO 3 interlayer into the Ti/Ce-PbO 2 (TCP). After systematical investigation on the Ti/FeTiO 3 (TF), TCP and TFCP anode with scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) measurements, the electrocatalytic properties of these electrocatalysts have been compared by checking electrocatalytic degradation towards levofloxacin (LEVO) antibiotics coupled with systematical optimization on the electrode preparation conditions and electrocatalytic degradation process parameters. Dramatically, the optimal TFCP delivers higher removal 95% of LEVO within 120 min than those of TF (63%) and TCP (49%). Quite obviously, the introduction of FeTiO 3 interlayer is the important reason for the enhanced electrocatalytic activity of TCP, which can give rise to larger electrochemical active surface area , moderate electrochemical resistance and higher oxygen evolution potential (OEP) of TFCP than those of the TF and TCP electrodes. Also, TFCP shows predominant reusability for repeated utilization and desirable wide-applicability for other antibiotics and dyes removal . The degradation pathway has been presumably speculated by analyzing the intermediates. In conclusion, this work paves a novel avenue for the highly efficient electrocatalytic degradation towards antibiotics by introducing the interlayer into the TCP.
研究领域:
环境科学
·
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 8
·1382
·
IF 5.719
Qi Zeng,Chu-Ya Wang,Bo-Xing Xu,Jianyu Han,Xin Fang,Guangcan Zhu
Bismuth oxybromide (BiOBr), with its special layered structure, is known to have potential as a visible-light-driven photocatalyst. However, the rapid recombination and short lifetime of the photogenerated carriers of BiOBr restrict its photocatalytic efficiency for the degradation of organic pollutants. Given the similar ionic size of Ce and Bi, Ce atoms might be easily introduced into the crystal of BiOBr to tailor its band structure. In this study, Ce doped BiOBr (Ce-BiOBr) samples with different percentages of Ce contents were prepared via a hydrothermal method. The intrinsic photocatalytic efficiency of Ce0.2-BiOBr for the degradation of bisphenol A (BPA) was 3.66 times higher than that of pristine BiOBr under visible light irradiation. The mechanism of Ce-doping modification for the enhanced photocatalytic performance was demonstrated based on a series of experiments and DFT calculation. The narrowed bandgap, the enhanced charge separation efficiency and Ce-doping energy level contributed to the remarkable photocatalytic performance of Ce-BiOBr.Keywords:bismuth oxybromide (BiOBr);Ce-doping modification;doping energy level;visible light;bisphenol A (BPA)
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 19
·6553
·
IF 3.748
Yuan Zhao,Tian Liang,Pengpai Miao,Tao Chen,Xiaobing Han,Guowen Hu,Jie Gao
The modification of polymers can significantly improve the ability to remove rare earth ions from wastewater, but so far few studies have focused on the irradiation-induced grafting method. In this study, a novel magnetic chelating resin for Ce(III) uptake was first synthesized by suspension polymerization of PMMA@Fe3O4microspheres followed by irradiation-induced grafting of glycidyl methacrylate (GMA) and subsequent amination with polyethyleneimine (PEI). The FT-IR, SEM, TG and XRD characterization confirmed that we had successfully fabricated magnetic PMMA-PGMA-PEI microspheres with a well-defined structure and good thermal stability. The obtained adsorbent exhibited a satisfactory uptake capacity of 189.81 mg/g for Ce(III) at 318.15 K and an initial pH = 6.0. Additionally, the impact of the absorbed dose and GMA monomer concentration, pH, adsorbent dosage, contact time and initial concentration were thoroughly examined. The pseudo-second order and Langmuir models were able to describe the kinetics and isotherms of the adsorption process well. In addition, the thermodynamic data indicated that the uptake process was spontaneous and endothermic. Altogether, this research enriched the Ce(III) trapping agent and provided a new method for the removal rare earth pollutants.Keywords:magnetic PMMA microspheres;PEI;radiation induced grafting;Ce(III) adsorption
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yangjie Fu,Yanjie Mao,Longyang Wang,Mengyi Qiu,Youran Xu,Jianying Qian,Men Tan,Kejie Zhang,Derek Hao,Qi Wang,Guoxiang Yang
Proper design and successful synthesis of photocatalysts with efficient interfacial charge transfer, strong redox capabilities, and strong environmental applications are critical. Herein, a novel Z-scheme heterojunction AgI/Ce-2MI nanocomposite with redox-retaining properties was successfully prepared by a simple precipitation method. Compared with AgI and Ce-2MI, the efficiency of the optimized Z-scheme AgI/Ce-2MI composites in photocatalytic reduction of Cr(VI) in water within 75 min could exceed 90%. The reduction rate of AgI/Ce-2MI to Cr(VI) was 0.0277 min −1 , which was 2.6 times and 6.8 times that of AgI and Ce-2MI, respectively. In addition, the cycle performance of AgI/Ce-2MI under different pH conditions was compared, and it was found that under the condition of pH= 2, its five-time catalytic activity stability showed good performance. Moreover, the enhancement process of reactive oxygen species •O 2 - and •OH were further verified by active radical capture experiment and ESR. Therefore, this study can provide a Z-scheme heterojunction nanocomposite photocatalytic process with environmental purification functions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2016
·Vol. 27
·期 1
·249-256
·
IF 1.308
Du Sen,Wang Luyan,Xue Ni,Wu Ting,Pei Meishan,Sui Weiping,Guo Wenjuan
Modified bentonite was prepared by grafting poly(2-(acryloyloxy)ethyl)trimethyl ammonium chloride by a Ce(IV)-redox process to remove an anionic dye, brilliant yellow (BY). The BY removal efficiency changed with pH, temperature and reaction time. The adsorption capacity for BY decreased slightly with value of pH enhanced from 2.0 to 10.0 in solution. Kinetics models and isotherms models were used to match the adsorption behavior. Adsorption kinetics showed the adsorption was a fast course, achieving balance within 180 min and could be described well by the pseudo-second-order model. The thermodynamic equilibrium data showed that the adsorption isotherm matched with Langmuir model. Results represented that the adsorption capacity increased greatly by grafting PDAC on bentonite and the maximum adsorption capacity could reach to 302.9 mg/g.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jing Zhang,Dumeijin Gong,Zian Cheng,Chao Shan
The peroxone (O 3 /H 2 O 2 ) process has long suffered from inefficient performance for water decontamination at acidic pHs. Herein, we find the evident capability of trace Ce(III) to boost the acidic peroxone process. In contrast to the negligible degradation (∼6% in 60 min) of oxalic acid (OA) as a recalcitrant compound in the O 3 /H 2 O 2 system, efficient removal of OA (∼95 %) was achieved by introducing trace Ce(III) (0.30 µM). OA was identified as an effective ligand activating Ce(III) by forming the Ce(III)-OA complex, which served as the catalytic active component to accelerate the decomposition of O 3 and H 2 O 2 to produce •OH and promote the co-degradation of refractory pollutant atrazine and ibuprofen. The remarkable catalytic activity of trace Ce(III) for peroxone reaction resulted from the efficient interconversion of Ce(III/IV) relying on both the favorable electron transfer from the ternary Ce(III)-OA-hydroperoxo complex to O 3 and the rapid reduction of Ce(IV) back to Ce(III) mainly by H 2 O 2 . Furthermore, the catalytic performance of Ce(III) for peroxone process outperformed Fe(II), Cu(II), and Co(II). This study puts forward an effective method to extrapolate the applicability of the peroxone (O 3 /H 2 O 2 ) process to the acidic range and enlightens the development of Ce-catalyzed peroxone processes.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2020
·Vol. 10
·期 11
·1329
·
IF 3.52
Shijie Hao,Yandi Cai,Chuanzhi Sun,Jingfang Sun,Changjin Tang,Lin Dong
Monolithic Mn-Fe-Ce-Al-O catalyst with honeycomb cordierite ceramic as a carrier was reported for the first time for low temperature deNOxapplication. In the reaction of selective catalytic reduction (SCR) of NO with NH3, a NO conversion of above 80% at 100 °C was obtained. Notably, the catalyst also showed excellent resistance against SO2and H2O. About 60% NO conversion was maintained after successive operation in the mixed stream of SO2and H2O for 168 h. The Brunner−Emmet−Teller (BET) measurement, SEM, EDS, thermogravimetric analysis (TG), FT-IR, and XPS results of the used catalysts indicated that certain amounts of ammonium sulfate was formed on the surface of the catalyst. XPS results revealed that partial of Fe2+was oxidized to Fe3+during the reaction process, and Fe2+species have strong redox ability, which can explain the decrease in activity after reaction. In addition, SO2and H2O induced a transformation of Ce from Ce4+to Ce3+on the surface of the catalyst, which increased the amount of chemisorbed oxygen. Owing to these factors, the addition of Ce and Fe species contributes to excellent resistance of the catalyst to SO2and H2O.Keywords:honeycomb catalyst;Mn-Fe-Ce-Al-O;low temperature denitration;water and sulfur resistance
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 46
·32030-32044
·
IF 10.7
Xue Bi,Kunpeng Song,Qianlong Li,Tao Lin,Ye-Tang Pan,Wei Wang,Jiyu He,Rongjie Yang
In recent years, there have been few reports on the application of zeolites in the field of flame retardants, although their excellent thermal stability indicates great potential as flame retardants. However, a key challenge that needs to be solved urgently is the compatibility between molecular sieves as inorganic fillers and polymer matrices, which directly affects their performance and stability in practical applications. In this work, ZSM-5 zeolite was used as the carrier, Ce ions were introduced through ion exchange, and the growth of Ce-MOF was restricted on its surface, and a Ce-MOF@ZSM-5 hybrid material was designed to improve the flame retardant and ultraviolet resistance properties of thermoplastic polyurethane elastomer (TPU). The absorbance value of TPU composites in the whole region is significantly higher than that of pure TPU, and its absorbance reaches 1.33. Compared with pure TPU, the peak heat release rate and peak smoke production rate of TPU/Ce-MOF@ZSM-5 composites were reduced by 26.0% and 34.8%, respectively. In addition, the chemical resistance of TPU composites has been significantly improved. This work provides the possibility of preparing three-proofing TPU materials with UV resistance, chemical resistance and fire resistance, and is expected to expand the application of TPU materials in other fields.
研究领域:
材料科学
·
高分子化学
·
阻燃材料研究
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengyu Zhang,Jing Wu,Wen Tang,Jinfei Mei,Qian Zhang,Junrong Wu,Deyun Xu,Zhaodi Liu,Fuying Hao,Liangquan Sheng,Huajie Xu
Regulating interfacial active sites to improve peroxymonosulfate (PMS) activation efficiency is a hot topic in the heterogeneous catalysis field. In this study, we develop an inverted loading strategy to engineer asymmetric Mn–O V –Ce sites for PMS activation. Mn 3 O 4 @CeO 2 prepared by loading CeO 2 nanoparticles onto Mn 3 O 4 nanorods exhibits the highest catalytic activity and stability, which is due to the formation of more oxygen vacancies (O V ) at the Mn–O V –Ce sites, and the surface CeO 2 layer effectively inhibits corrosion by preventing the loss of manganese ion active species into the solution. In situ characterizations and density functional theory (DFT) studies have revealed effective bimetallic redox cycles at asymmetric Mn–O V –Ce active sites, which promote surface charge transfer, enhance the adsorption reaction activity of active species toward pollutants, and favor PMS activation to generate (•OH, SO 4 •− , O 2 •− and 1 O 2 ) active species. This study provides a brand-new perspective for engineering the interfacial behavior of PMS activation.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
·
2022
·Vol. 38
·期 9
·1-12
·
IF 4.253
Zhao Yi,Wang Xiao-yan,Sun Yan,Li Zhi,Liu Tao,Liu Qing-mei,Chen Jingyi
Brevinin2-CE (B2CE), a natural peptide containing 37 amino acids, was first isolated from the skin secretions of the Chinese forest frog Rana chensinensis. B2CE shows good antibacterial activity. In this study, a series of B2CE analogs with differences in cationicity, α-helicity, hydrophobicity and amphipathic properties were designed through chain-length deletion and amino acid substitution. The most potent, nontoxic analog, B2CE-N26V5K, was identified by examination of its antibacterial activity, hemolytic activity, and stability under physiological conditions. The increased cationicity, hydrophobicity and more obvious hydrophilic and hydrophobic surface of B2CE-N26-N16WA18KG23K did not improve the antibacterial activity but increased the hemolytic activity of this modified peptide. The helicity might promote antibacterial activity for brevinin-2 peptides, as the 15-aa analogs with lower helicity show decreased potency against different test bacteria (approximately 2- to 72-fold) compared to B2CE-N26V5K. Additionally, the results indicated that the “Rana box” does not affect the antimicrobial activity of brevinin-2 peptides, as B2CE, B2CE-nonDS and B2CE-C31-37 S have similar strong inhibitory effects on both gram-positive and gram-negative bacteria. However, the “Rana box” does affect the hemolytic activity, as the HC 50 values of the 3 peptides range from 25 ~ 130 µM. Furthermore, B2CE-N26V5K caused obvious morphological alterations of the bacterial surfaces, as shown by atomic force microscopy. Additionally, B2CE-N26V5K exhibited strong membrane-disrupting activity when examined using the LIVE/DEAD Bac Light Bacterial Viability Kit. Thus, the antibacterial effect of B2CE-N26V5K on gram-negative and gram-positive bacteria may be caused by cell membrane attack. In conclusion, the excellent candidate B2CE-N26V5K was obtained and has application prospects as a novel anti-infective agent.
研究领域:
生物化学
·
微生物学
·
药学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2015
·Vol. 17
·期 13
·2690-2697
·
IF 4.034
Ke Tang,Jingcai Zhang,Wenzhi Wang,Shuping Wang,Jinxin Guo,Yanzhao Yang
A simple protocol has been reported here to successfully perform a controllable conversion between Ce(OH)4 nanorods [Ce(OH)4-NR] and Ce(OH)4 nanoflowers [Ce(OH)4-NF] based on a prolonged mechanical force-driven stirring process. Results show that the Ce(OH)4 nanostructures undergo a morphology transformation from the initial nanorods to irregular nanoflowers, then to nanoflowers emanating from one center only, by varying the stirring time before solvothermal reaction. The detailed study confirmed that the mechanical force significantly improved the mass transport of the solution and drove the seeds of Ce(OH)4-NR [seeds-NR] to generate the seeds of Ce(OH)4-NF [seeds-NF]. The final CeO2 products (CeO2 nanorods [CeO2-NR] and CeO2 nanoflowers [CeO2-NF]) that inherited the original morphology were obtained by annealing Ce(OH)4-NR and Ce(OH)4-NF, respectively. To further optimize the performance of the final products, Au/CeO2-NR and Au/CeO2-NF were synthesized by a simple oxidation–reduction process, which led to increased surface areas and promising potential in CO oxidation.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Fen Yang,Shuai Zhao,Biaobiao Ge,Jie Huang,Qianmin Dong,Qiang Chen,Shangzhong Jin,Pei Liang
We demonstrate a method for the detection of Ziram in water by using the adsorption properties of UiO-66(Ce) metal-organic framework (MOF) combined with the surface-enhanced Raman scattering (SERS) substrate of precious metal nanoparticles. The traditional UiO-66 is based on Zr as the metal center. After replacing the Zr metal center with Ce, the synthesized UiO-66(Ce) has short aging, high efficiency, low energy consumption, and energy saving. Furthermore, by adding P123, UiO-66 is modified to have a structure similar to the durian shell spine, which can provide more composite sites for metal nanoparticles. Thus, more SERS hot spots are generated. The combination of AuNPs with UiO-66(Ce) has been confirmed by XRD, XPS, and other characterization and analysis techniques. The Raman probe molecule R6G was used as an evaluation tool to evaluate the performance of this SERS substrate. The results showed that the relative standard deviation (RSD) of the substrate was as low as 8.96 % at a concentration of 10 –6 M of the R6G solution, and the substrate demonstrated high stability. Finally, the substrate was applied for the detection of ziram in lake water, achieving a detection concentration of 10 –8 M, an enhancement factor of 2.57 × 10 5 , and a detection limit as low as 5.21 × 10 –9 M, demonstrating excellent sensitivity and enabling efficient trace pollutant detection in complex water environments.
研究领域:
环境科学
·
分析化学
✓ 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）