JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Yang Wan,Huijie Wang,Jiejing Liu,Xin Liu,Xianghai Song,Weiqiang Zhou,Jisheng Zhang,Pengwei Huo
Waste plastics have posed enormous to the environment, but their recycling, especially polyethylene terephthalate plastics, was still a huge challenge. Here, CdS/CeO 2 was used as the photocatalyst to promote the degradation of PET-12 plastics by activating peroxymonosulfate (PMS) synergistic photocatalytic system. The results showed that 10 % CdS/CeO 2 had the best performance under the illumination condition, and the weight loss rate of PET-12 could reach 93.92 % after adding 3 mM PMS. The effects of important parameters (PMS dose and co-existing anions) on PET-12 degradation were systematically studied, and the excellent performance of the photocatalytic-activated PMS system was verified by comparison experiments. SO 4 •− contributed the most to the degradation performance of PET-12 plastics, which was demonstrated by electron paramagnetic resonance (EPR) and free radical quenching experiments. Furthermore, the results of GC showed that the gas products including CO, and CH 4 . This indicated that the mineralized products could be further reduced to hydrocarbon fuel under the action of the photocatalyst. This job supplied a new idea for the photocatalytic treatment of waste microplastics in the water, which will help recycle waste plastics and recycle carbon resources.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Burenbayaer Borjigin,Lan Ding,Chenghong Liu,Huiqin Li,Xiaojing Wang
The exploration of highly efficient methods for degrading VOCs, with concurrent low energy consumption and lasting reusability, holds significant appeal. In this regard, an S-type CuBi 2 O 4 /CeO 2-x heterojunction with the robust interfacial interactions is presented as an active photocatalyst for the efficient decomposition of gaseous toluene under full-spectrum irradiation. The optimal sample CC15 effectively degrades gaseous toluene at a high concentration of 1800 ppm within 2 h, achieving a notable CO 2 yield of 87.05 %, and a TOC (total organic carbon) removal rate of 89.33 %. Furthermore, CuBi 2 O 4 /CeO 2-x exhibits exceptional stability, maintaining its 100 % degradation capability over 32 cycles for nearly 64 h. Comparative characterization reveals that the superior performance derives from an abundance of oxygen vacancies and effective pre-adsorption capabilities, which facilitate rapid adsorption of VOCs on the catalyst surface, thereby increasing the likelihood of degradation reactions. Additionally, the formation of an S-type heterojunction, valence pairing between Bi 3+ and Ce 3+/4+ ions, and strong interfacial interactions serve as the primary pathways for the efficient separation of photogenerated carriers, contributing to the high CO 2 production rate and prolonged cycle stability. The present investigation underscores the significant potential of vacancy-rich S-type heterojunctions and interfacial interactions between composite components, offering excellent activity and long-term availability for VOCs removal.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Ziwen Wang,Qiuyu Wang,Zhe Yin,Man Zhang,Guoping Yu,Qingcheng Luo,Huanyu Chen,Binglin Tang,Kangzheng Li,Zhichao Zhang,Bo Lv
White plastic waste in the ocean not only destroys the Marine ecology, but also poses a potential threat to human health. In this study, we proposed a simple synthesis method by introducing suitable electron-bridge to design and synthesize CeO 2 -based II-type heterostructure catalysts with dual functions for efficient hydrogen production from seawater and photocatalytic conversion of plastics. The CeO 2 /CdS/NiS showed remarkable photocatalytic performance in the presence of plastic as the sacrificant. The hydrogen production rate of CeO 2 /CdS/NiS at the fifth hour was 32.40 mmol/g/h, which was 29 times that of bare CdS and 463 times that of bare CeO 2 . At the same time, the use of natural seawater to replace deionized water in this study was economically beneficial. Furthermore, we verified the feasibility of the selective oxidation of plastics into pyruvate, acetate and formate using CeO 2 /CdS/NiS photocatalyst and put forward a rational reaction mechanism. Overall, the study provids new possibilities for solving the problem of Marine plastic pollution and promoting the development of clean energy.
研究领域:
环境科学
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能源科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2025
·
IF 5.8
Yan Zhang,Xinhui Huang,Yaxue Zhang,Letian Lv,Chengyuan Su,Shu Gao,Zhi Huang,Menglin Chen,Xianfeng Lin
We prepare CdS-CeO 2 /sepiolite materials in a one-step process and characterize their structural, morphological, and optical properties. CdS-CeO 2 /sepiolite displays enhanced adsorption of the environmentally hazardous dye Rhodamine B (RhB), up to 34.92 mg/g. Harnessing synergy between adsorption and photocatalysis, CdS-CeO 2 /sepiolite removes 98.57 % of RhB from solution after 150 min of visible light illumination and is robust to a wide pH range. Quenching experiments and electron spin resonance (ESR) indicates that singlet oxygen and holes are the main reactive groups during photocatalytic degradation. CdS and CeO 2 hinder the recombination of photogenerated electron-hole pairs, accelerate charge transfer, and enhance visible light absorption. These CdS-CeO 2 /sepiolite materials have potential application in the efficient photodegradation of dye in a wide range of pH.
研究领域:
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
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Weirong Zhou,Guoxuan Gu,Chao Liao,Yuan Gao,Jiayin Han,Dehao Kong,Yubing Gao,Zhangjun Wang,Ning Yu,Geyu Lu
Detecting trace levels of hazardous gas nitrogen dioxide (NO 2 ) at low temperatures still remains a persistent challenge. In this work, CeO 2 nanooctahedrons, nanorods and nanocubes with different exposed facets were synthesized and subsequently decorated with rGO. The NO 2 sensing properties of three CeO 2 nanocrystals-rGO nanocomposites at 65 ℃ were systematically investigated. CeO 2 nanocubes-rGO with (100) exposed plane showed superior sensing performance with eminent selectivity, long-term stability and low limit of detection (75 ppb). The results of characterizations and DFT calculations indicated the presence of abundant oxygen vacancies on (100) plane, due to the low formation energy of oxygen vacancy. Besides, the nature of polar plane and low adsorption energy on defective (100) plane promoted the adsorption of NO 2 on CeO 2 nanocubes-rGO nanocomposites. The decoration of rGO improved the electrical conductivity of CeO 2 , established the heterojunction and generated additional oxygen vacancies on the heterointerfaces. Therefore, the outstanding NO 2 sensing characters of CeO 2 nanocubes-rGO could be attributed to the polar exposed planes, abundant oxygen vacancies and plentiful interfacial heterojunctions. The present approach sheds light on the rational design of sensing materials via facet- and defect-engineering, and developed a CeO 2 -based NO 2 sensors with a low working temperature for environmental monitoring and safety assurance.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
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IF 3.764
Wuyuan Liu,Zihan Gao,Xiangyun Zhao,Jiajian Gao,Runnong Yang,Lin Yu
The Cr-doped CeO2–TiO2 catalysts (CrCeTi) were produced via a coprecipitation method and used for selective catalytic reduction (SCR). The CrCeTi catalyst has good catalytic performance and sulfur resistance. The results of X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), NH3-TPD, NO-TPD, X-ray photoelectron spectroscopy (XPS), and H2 temperature-programmed reduction (H2-TPR) suggested that the CrCeTi catalyst with high specific surface area (SSA), strong surface acidity, enhanced redox properties, and effective electron transfer (3Ce4+ + Cr3+ ↔ 3Ce3+ + Cr6+) were the important promotion factors for excellent SCR properties. The in situ diffuse reflectance infrared spectroscopy (DRIFTS) indicated that the incorporation of Cr could improve the adsorption capacity of nitrate and the activation capacity of NH3, which were conducive to enhancing the catalytic activity. The thermogravimetric analysis-mass spectrometry (TG-MS) confirmed that the doping of Cr reduced SO2 surface adsorption and promoted the decomposition of NH4HSO4 (ABS). Therefore, the CrCeTi catalyst showed excellent resistance to SO2 poisoning.
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
Scientific Reports
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2019
·Vol. 9
·期 1
·1-14
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IF 4.011
Dong Fang,Meng Yu,Han Weiliang,Zhao Haijun,Tang Zhicheng
Here, we synthesized a series of Cu/CeO 2 catalysts with different morphology and size, including Cu/CeO 2 nanospheres (Cu/CeO 2 -S), Cu/CeO 2 nanoparticles (Cu/CeO 2 -P), Cu/CeO 2 nanorods (Cu/CeO 2 -R) and flower-like Cu/CeO 2 microspheres (Cu/CeO 2 -F) to systematically explore the structure-activity relationship in CO oxidation. Crucially, the effect of morphology, crystal size, Ce 4+ /Ce 3+ species, oxygen vacancies derived from the removal of lattice oxygen (O latt ) species in CeO 2 and lattice defect sites on CO activity was revealed through various characterizations. It was clearly discovered that the activity of these catalysts was as follows: Cu/CeO 2 -R > Cu/CeO 2 -P > Cu/CeO 2 -S > Cu/CeO 2 -F, and the Cu/CeO 2 -R catalyst preferentially showed the best catalytic performance with a 90% conversion of CO even at 58 °C, owned the smaller particles size of CeO 2 and CuO, and exhibited the higher concentration of O latt species and oxygen vacancies. Besides, it is also verified that the Cu/CeO 2 -F sample exhibited the larger CeO 2 crystal size (17.14 nm), which led to the lower Cu dispersion and CO conversion, even at 121 °C (T 90 ). Most importantly, we discovered that the amount of surface lattice defect sites was positively related to the reaction rate of CO. Simultaneously, DFT calculation also demonstrated that the introduced oxygen vacancies in CeO 2 could accelerate the oxidation of CO by the alteration of CO adsorption energy. Therefore, the morphology, the crystal size, the content of oxygen vacancies, as well as lattice defects of Cu/CeO 2 catalyst might work together for CO oxidation reaction.
研究领域:
催化化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
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2025
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IF 3.9
Jin Yuan,Jinxing Mi,Weitao Zhao,Ke Zheng,Shaoqi Zhou,Jianjun Chen
Although ceria-based catalysts have been proven to be a promising alternative to conventional vanadyl catalysts for the selective catalytic reduction of NOx with NH3 (NH3–SCR), whether the interaction between tungsten (W) and CeO2 could be well established for enhancing SCR performance is still unclear. Herein, W/CeO2 catalysts with different CeO2 morphologies for SCR are fully investigated. Systematic characterization results confirmed that the crystalline WO3 phase was formed on W-loaded CeO2 nanocubes, nanospindles, and nanospheres. Intriguingly, the W/CeO2 nanorods exhibited exclusively polymeric tungstate species. This divergence originates from the distinct W-CeO2 interaction mediated by preferentially exposed {110} lattice planes, endowing the nanorod catalyst with stronger reducibility, more surface-active oxygen species, and acid sites. Consequently, the NH3–SCR activity followed the order W/CeO2 nanorods > W/CeO2 nanospindles > W/CeO2 nanocubes > W/CeO2 nanospheres. This work reveals the significant role of the CeO2 morphology in the dispersion and interaction of W species, which directly influences the NH3–SCR performance. The insight offers a valuable opportunity for the design of a more efficient SCR catalyst.
研究领域:
化学工程
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催化科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Lingwei Yu,Leyi Zhou,Qi Guo,Hongchuan Zhang,Xi Xiao,Ruixue Zhao,Zifeng Yan,Ying Zhang
The challenge of converting carbon dioxide (CO 2 ) electroreduction into high value-added products is to obtain highly selective electrocatalysts. Research has shown that cuprous oxide (Cu 2 O) effectively facilitates the activation of CO 2 and suppress the competing hydrogen evolution reaction. However, during the process of electrochemical reduction, the valence state of Cu 2 O is prone to transformation. Herein, a series of Cu 2 O–CeO 2 -X catalysts (X represents different amounts of CeO 2 added) by applying Cu 2 O onto Cerium oxide (CeO 2 ) nanorods were synthesized via the impregnation method and used as electrocatalysts. We found that the Faradaic efficiency of methane (FE-CH 4 ) for Cu 2 O–CeO 2 -2 reached 65.1 % at −1.6 V vs. RHE, exceeding many catalysts previously reported. From the Cu LMM Auger spectra, it was found that the valence state of Cu species in Cu 2 O–CeO 2 -2 is mainly Cu 0 (accounting for 93.39 %), while in Cu 2 O–CeO 2 -3, the proportion of Cu 0 is 56.34 %. This indicates that CeO 2 has a regulatory effect on the valence state of Cu species. Additionally, we observed the valence state of Cu in Cu 2 O–CeO 2 -2 after the CO 2 reduction reaction and found that the proportion of Cu 0 changed little (94.97 %), which proves that CeO 2 plays a role in stabilizing the valence state of Cu. Research has demonstrated that Cu 0 can adsorb the ∗CO intermediate on its surface, followed by a hydrogenation reaction to generate CH 4 (∗CO + H + + e − → ∗CHO). Copper-based catalysts in which Cu 0 dominates among the Cu species are conducive to the conversion of CO 2 into CH 4 . In situ ATR-SEIRAS spectra confirmed the presence of key intermediates such as ∗CHO and explored the formation pathway of CH 4 (CO 2 → ∗COOH → ∗CO → ∗CHO → ∗OCH 2 → CH 4 ). This study provides a new way to design efficient copper oxide-based catalysts for CO 2 electroreduction by adjusting and stabilizing the ratio of copper valence state reasonably.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Shaomian Liu,Wenjuan Xue,Yongjun Ji,Wenqing Xu,Wenxing Chen,Lihua Jia,Tingyu Zhu,Ziyi Zhong,Guangwen Xu,Donghai Mei,Fabing Su
Simultaneously improving both NO x conversion and N 2 selectivity in the selective catalytic reduction of NO by CO (CO-SCR) under O 2 -containing conditions is highly challenging because of the competitive reactions of NO x and CO with O 2 . Here, we demonstrate that the interfacial oxygen vacancies (IOVs) generated at the Co 3 O 4 -CeO 2 heterointerfaces by ball-milling-induced strain can remarkably boost both NO x conversion and N 2 selectivity in the temperature range of 100–400 °C. The Co 3 O 4 -CeO 2 -IOV catalyst achieved approximately 100% NO x conversion and 100% N 2 selectivity (200–350 °C, 1–5 vol% O 2 , and 20,000 h −1 ); even under 10 vol% O 2 , it still showed good catalytic performance. The spectroscopy analysis and theoretical calculations reveal that compared with O 2 activation, IOVs are more favorable for the rate-limiting step of NO adsorption and dissociation. This work provides an effective strategy to create IOVs within metal oxide composite catalysts using ball-milling-induced interfacial strain for improving CO-SCR performance.
研究领域:
材料科学
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环境催化
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shiyou Yu,Zhenge Yue,Xin Wang,Siyao Zhang,Zhuo Zhou,Lan Zhang,Yongqiang Ma
In the present study, we constructed an electrochemical sensor using three materials, namely, cerium dioxide (CeO 2 ) composite platinum (Pt) and polymer 3-amino-5-mercapto-1,2,4-triazole (PTA), prepared by hydrothermal method, to detect xanthines and uric acid. Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier infrared spectroscopy (FT-IR) were used to characterize the morphology, elemental composition, and structure of materials. The results demonstrated that the PTA/CeO 2 @Pt composites were prepared. The electrochemical behavior of xanthines and uric acid on PTA/CeO 2 @Pt composite electrodes was assessed by cyclic voltammetry (CV) and differential pulsed voltammetry (DPV). The results demonstrated that the dropping amount was 20 µL under a phosphoric acid buffer solution (pH 6). The peak current of xanthine (XA) demonstrated two good linear relationships with concentration, the linear regression equation was I XA = 0.3265C XA + 8.1967 R 2 = 0.994 in the concentration range of 10–138 µmol/L, whereas it was I XA = 3.9884C XA + 51.661 R 2 = 0.992 in the concentration range of 139–330 µmol/L. The detection limit was 10.36 × 10 –7 M. The freshness of fish meat was evaluated, and the correlation analysis between evaluation results and results of xanthine detection in fish meat by PTA/CeO 2 @Pt electrochemical sensor demonstrated that r = 0.945 and P < 0.01 had a good correlation. The sensor could be used to determine the xanthine content in fish to reflect the freshness of fish, thus displaying good application prospects.
研究领域:
生物化学
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食品科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Nanqi Shi,Zhike Li,Xin Li,Hongxin Luo,Shuzhen Dong,Haiyan Li
Hexagonal boron nitride (h-BN), as a two-dimensional lamellar material, has been paid more and more attention in the field of corrosion protection because of its excellent thermal stability, chemical stability and insulation. In order to solve the problem that h-BN is difficult to disperse in resin, inspired by the adhesion ability of mussel secretions, the surface of h-BN was modified with polydopamine (PDA) to improve the dispersion of the fillers in epoxy resin, and the prepared corrosion inhibition CeO 2 nanoparticles were loaded on the surface. A functional filler CeO 2 &PDA/h-BN with corrosion inhibition effect was prepared. The surface morphology , chemical structure and thermal stability of functional fillers were analyzed by SEM, FTIR, XRD and thermogravimetric analysis . The test results show that after 40 days of testing, the low-frequency impedance modulus of the epoxy composite coating is 15 times that of the pure epoxy resin, and the wear resistance properties also significantly improved. The anti-corrosion mechanism of the composite coating is analyzed, and the synergistic effect of h-BN's barrier ability and CeO 2 's corrosion inhibition ability is revealed. This paper provides an idea for the preparation of multifunctional h-BN composite anticorrosive filler.
研究领域:
材料科学
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腐蚀防护
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表面工程
✓ 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）