ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Yanhui Dai,Feiran Chen,Le Yue,Teng Li,Zhixiang Jiang,Zefeng Xu,Zhenyu Wang,Baoshan Xing
Many studies demonstrated that CeO2 nanoparticles (NPs) could protect plant from stress and improve plant growth, with a great application potential in agriculture. However, our knowledge of their fate particularly in asexual plants and their effect on the rhizosphere microbiome is limited. In this study, the transport and transformation of CeO2 NPs in an asexual plant—strawberry (Fragaria × ananassa Duch.)—were investigated. The effects of root-exuded/newly formed Ce species on rhizosphere bacterial community were also examined. Strawberries were exposed to CeO2 NPs at 0–2000 mg/L for 45 days via a split-root system in the field. CeO2 NPs were taken up by the exposed mother ramet roots and then translocated to all the mother and daughter ramet tissues. As indicated by the analysis from high-resolution transmission electron microscopy and X-ray absorption near-edge structures, in addition to CeO2 NPs, CePO4, Ce(III) acetate, and Ce(III)-cysteine were found in the roots, and CePO4 was present in the rhizosphere soil. The Ce species in the rhizosphere soil decreased the rhizosphere microbial diversity, but stimulated the relative abundance of specific plant growth promoting rhizobacteria. These results provide new insights for understanding the benefits and sustainable applications of NPs.
研究领域:
农业
·
环境科学
·
微生物学
·
植物科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2017
·
IF 5.651
Jun Tang,Ningyuan Zhu,Yan Zhu,Seyed Morteza Zamir,Yonghong Wu
The responses of periphytic biofilm to CeO 2 nanoparticle (CNP) exposure were explored by investigating community shifts and pollutant removal. Results showed that CNPs entered the sensitive microbial cells in the periphytic biofilm, leading to cytomembrane damage and intracellular reactive oxygen species (ROS) generation. The periphytic biofilm communities were, however, able to adapt to the prolonged exposure and maintain their pollutant removal (i.e., phosphorus, nitrogen and copper, organic matter) performance. Observations under synchrotron radiation scanning transmission X-ray microscopy revealed that fewer CNPs were distributed in algal cells compared to bacterial cells, wherein the transformation between Ce(IV) and Ce(III) occurred. High-throughput sequencing further showed that the proportion of algae, such as Leptolyngbya and Nostoc, significantly increased in the periphytic biofilm exposed to CNPs while the proportion of bacteria, such as Bacilli and Gemmatimonadetes, decreased. This change in community composition might be the primary reason for the sustained pollutant removal performance of the periphytic biofilm.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Zhen-Hong He,Yong-Chang Sun,Yuan-Yuan Wei,Kuan Wang,Weitao Wang,Zhuo Chen,Zhong-Yu Wang,Yue Tian,Zhao-Tie Liu
The reaction of methanol and CO 2 is an ideal route for the utilization of CO 2 resources and the synthesis of dimethyl carbonate (DMC), which is an important fuel and fuel-additive. In this work, we developed a catalyst of CeO 2 nanoparticles (CeO 2 NPs) loaded on Co 3 O 4 nanosheets (Co 3 O 4 NSs) with the Ce/Co molar ratio of 3/7 (Ce 3 -NPs/Co 7 -NSs) which could efficiently catalyze the reaction. The formation activity and the yield of DMC reached 16.8 mmol·g cat -1 ·h −1 and 47.2 % (based on methanol), surpassing most reported catalysts, especially at a relatively low temperature of 120 ℃. Characterization results indicated that the Co 3 O 4 NSs could enhance the amounts of oxygen vacancies and CO 2 adsorption but reduce methanol adsorption. The adsorption equilibrium between methanol and CO 2 is crucial for the titled reaction, and the in-situ IR spectra confirmed that the catalyst could simultaneously activate CO 2 and methanol and the reaction involves a Langmuir-Hinshelwood (LH) mechanism. The present strategy for constructing a catalyst of CeO 2 nanoparticles loaded on Co 3 O 4 nanosheets provides an efficient catalyst for the DMC synthesis from CO 2 and methanol and offers an important reference in building other catalysts with adjustable adsorption capacities of CO 2 and methanol.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2017
·
IF 2.589
Lianbo Wang,Ming Chen,Huabing Liu,Chuanhai Jiang,Vincent Ji,Florent Moreira
In present work, the ternary Ni-Ti-CeO 2 composite coatings were electrodeposited on Al matrix composite (CNT/7075) in traditional Watts' solution containing various concentrations of CeO 2 nanoparticles and constant concentration of Ti microparticles . The effects of CeO 2 nanoparticles on microstructure and corrosion resistance of the obtained composite coatings were comprehensively investigated. The incorporation of moderate CeO 2 nanoparticles (less than 10 g L − 1 in Watts' solution) gave rise to grain refinement, random-orientation growth of nickel deposit and smooth surface of the composite coating. Corrosion tests of the Ni-Ti-CeO 2 composite coatings in 3.5 wt% sodium chloride (NaCl) at 25 °C illustrated the optimised microstructure favoured the enhancement of corrosion resistance. Further analyses of the corrosion behavior demonstrated that the embedded CeO 2 nanoparticles facilitated the formation of a compact passive film on the surface of the composite coatings during corrosion and promoted the formation of TiO 2 on the surface of Ti microparticles. The formation of TiO 2 not only protected the Ti metal particles but also helped to improve the corrosion resistance of the composite coatings, because the TiO 2 coated Ti microparticles decreased the attack probability of nickel deposits by corrosive medium. Typically, the Ni-Ti-CeO 2 composite coating electrodeposited in Watts' solution containing 10 g L − 1 CeO 2 nanoparticles possessed the best corrosion resistance and excessive CeO 2 nanoparticles deteriorated the corrosion resistance.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Hui Wang,Haiming Hu,Chunyong Zhou,Wangru Wei,Bing Fan,Haibo Wang,Shihua Dong
Corrosion of mild steel is everywhere and eco-friendly and efficient corrosion protection strategies deserve to be popularized. Superhydrophobic coatings are available for metal corrosion protection, but the limited-service life restricts their development. Here, we prepared environmentally friendly coatings with long-term corrosion resistant using a simple spray strategy. A two-layer superhydrophobic self-healable composite coating was prepared by spraying WFPU and fluoroCeNPs onto mild steel. The bottom WFPU prevents corrosion by corrosion inhibitor CeO 2 and repairs physical scratches by heating. The upper layer of fluoroCeNPs prevents the penetration of corrosive media by forming an air cushion at the solid-liquid interface. The combination of low surface energy and micro/nano hierarchical structure allows WFPU/fluoroCeNPs coating to exhibit superhydrophobicity and low adhesion, with a water contact angle of 157° and adhesion force 12.8 μN. In addition, WFPU/fluoroCeNPs coating exhibit excellent corrosion resistance, with an impedance modulus of 7.2 × 10 9 Ω cm 2 at low frequency (f = 0.01 Hz), which remains at 10 8 Ω cm 2 after 60 days in 3.5 wt% NaCl solution. After self-healing, the material can recover to its original state, both in terms of mechanical and corrosion protection properties. This new composite coating, which combines environmental protection, energy saving and remarkable effects, has a wide application value for the protection of metal against corrosion.
研究领域:
材料科学
·
腐蚀防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Lingling Wang,Hui Huang,Songhua Xiao,Daoping Cai,Yuan Liu,Bin Liu,Dandan Wang,Chenxia Wang,Han Li,Yanrong Wang,Qiuhong Li,Taihong Wang
We report a room-temperature NH3 gas sensor with high response and great long-term stability, including CeO2 NPs conformally coated by cross-linked PANI hydrogel. Such core–shell nanocomposites were prepared by in situ polymerization with different weight ratios of CeO2 NPs and aniline. At room temperature, the nanohybrids showed enhanced response (6.5 to 50 ppm of NH3), which could be attributed to p–n junctions formed by the intimate contact between these two materials. Moreover, the stability was discussed in terms of phytic acid working as a gelator, which helped the PANI sheath accommodate itself and enhance the mechanical strength and chemical stability of the sensors by avoiding “swelling effect” in high relative humidity. The sensors maintained its sensing characteristic (response of ca. 6.5 to 50 ppm of NH3) in 15 days. Herein, the obtained results could help to accelerate the development of ammonia gas sensor.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 7
·2923-2931
·
IF 4.569
Yikang Cong,Xingnan Chen,Yan Mei,Jun Ye,Ting-Ting Li
To realize electrocatalytic water splitting for hydrogen production, the development of efficient and durable anode materials containing earth-abundant elements is of great significance. In this work, we demonstrate a novel heterostructure with easily depositing CeO2 nanoparticles on the surface of the metal–organic framework (MOF)-derived Co0.4Ni1.6P nanowire arrays. Such an interface engineering strategy triggers the formation of abundant oxygen vacancies and provides more electrocatalytically active sites. Besides, the synergistic effect in this composite can regulate the electronic structure, and lead to an enhanced charge-transfer ability. Benefiting from the above superiorities, this heterostructure exhibits remarkable electrocatalytic performance towards the oxygen evolution reaction (OER) in 1 M KOH electrolyte, requiring overpotentials (η) of 268 and 343 mV to yield current densities of 10 and 100 mA cm−2, respectively, accompanied by a low Tafel slope of 79.3 mV dec−1. Furthermore, the electrocatalytic performance of this heterostructure for the OER in simulated alkaline seawater (1 M KOH + 0.5 M NaCl) was also studied, and it achieved low η values of 345 and 394 mV to drive 100 and 200 mA cm−2, respectively. This work presents a simple approach to fabricate heterostructural electrocatalysts with CeO2 nanoparticles for high-performance water/seawater electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 35
·期 8
·e6269
·
IF 4.105
Xiaoying Wang,Biao Li,Jingjing Fan,Shanshan Tian,Xiangyang Wei
Polymer functionalized nanoparticles (NPs) have a great attention in biomedical applications owing to their unique properties like regenerative antioxidant, anti-inflammatory, auto-catalytic properties, and biocompatibility. In this current work, we demonstrated a facile synthesis of Se-CeO 2 via chemical method followed by precipitation method. The prepared Se NPs were characterized by ultraviolet–visible (UV-vis) spectroscopy, and the size and morphology of the NPs were analysed using transmission electron microscopy (TEM). Meanwhile, Se-CeO 2 NPs loaded on polylactic-co-glycolic acid (PLGA) nanocarrier were characterised by Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), TEM, and energy dispersive X-ray analysis (EDAX) mapping techniques. The morphological and spectroscopic investigations of prepared nanomaterials have exhibited favourable morphological structure and chemical interactions with respective polymeric molecules, which established that nanovesicle suitability for the SCI functional recovery. We first investigated Se nanoformulated CeO 2 material for the potential healing of in vitro spinal cord study. Our results demonstrated that preparation of NPs loaded PLGA nanocarrier has provide effective spinal cord regeneration and imply that it was explored that promising nanocarrier in the SCI treatment. Se-NPs encapsulated CeO 2 nanostructures administrations for SCI therapies have greatly suppressed oxidative stress and induced anti-inflammatory action, which leads to prospective therapeutic benefits of spinal cord regeneration. These investigative results demonstrate that Se-CeO 2 NPs with PLGA carrier could have great attention for effecient functional recovery treatment and care for spinal cord injury.
研究领域:
生物医学工程
·
纳米医学
·
再生医学
✓ 已验证
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 3
·458
·
IF 3.164
Wei Wang,Baikai Zhang,Shuai Jiang,Huiyu Bai,Shengwen Zhang
The major challenge in preparing polymer nanocomposites is to prevent the agglomeration of inorganic nanoparticles (NPs). Here, with regenerated cellulose (RC) films as supporting medium, UV-shielding and transparent nanocomposite films with hydrophobicity were fabricated by in situ synthesis of CeO2NPs. Facilitated through the interaction between organic and inorganic components revealed by X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) characterization, it was found that CeO2NPs were uniformly dispersed in and immobilized by a cellulose matrix. However some agglomeration of CeO2NPs occurred at higher precursor concentrations. These results suggest that the morphology and particle size of CeO2and the corresponding performance of the resulting films are affected by the porous RC films and the concentrations of Ce(NO3)3·6H2O solutions. The optimized nanocomposite film containing 2.95 wt% CeO2NPs had more than 75% light transmittance (550 nm), high UV shielding properties, and a certain hydrophobicity.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
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
·
腐蚀防护
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Xianmin Gong,Shijun Xu,Yiling He,Kaijun Wei,Quangang Chen,Qing Yuan,Yi He,Yi Fan,Xingtao Cheng
Metal-based composite coatings have been widely studied for their excellent properties. In order to improve the properties of nickel tungsten boron (Ni–W–B) matrix, Ni–W–B/PC coatings were prepared by electrodeposition in the presence of polydopamine functionalized VC (P–VC) and cerium oxide (CeO2) nanoparticles. The effect of cerium oxide content in the nanomaterials on the properties of Ni–W–B coatings was investigated. The results showed that the prepared coatings were dense, uniform, and crack-free, and the best performance was achieved at a cerium oxide content of 2 g/L. The addition of CeO2 nanoparticles can fill the tiny defects in the coating and optimize the coating structure. The addition of these two materials refines the size of the coating grains. In terms of coating performance, the corrosion resistance of the composite coating was enhanced with the addition of CeO2 at a certain P–VC concentration, and the total impedance of the composite coating was 24,030 Ω·cm2, which was 4.8 times higher than that of the Ni–W–B coating and 1.7 times higher than that of the Ni–W–B/P–VC coating. In addition, the hardness of the Ni–W–B/PC-2 composite coating reached 1033.93 HV at a CeO2 content of 2 g/L. The wear resistance of this composite coating was also optimized. Compared with the Ni–W–B/P–VC composite coating, the average coefficient of friction was reduced by 8.8%, and the wear resistance of the composite coating was further improved, which was attributed to the synergistic effect of the two materials. Moreover, the Ni–W–B/PC film has excellent hardness and corrosion resistance, which is promising for the application in harsh environments.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Lianbo Wang,Shilong Xing,Zizhen Shen,Huabing Liu,Chuanhai Jiang,Vincent Ji,Yuantao Zhao
In current work, Ni-Ti-CeO 2 nanocomposite coatings were achieved by co-adding Ti microparticles and CeO 2 nanoparticles. Designed experiments and COMSOL computer simulation were applied to reveal the synergistic role of Ti microparticles and CeO 2 nanoparticles in tailoring the spatial microstructures and properties of Ni-Ti-CeO 2 nanocomposite coating. Unilaterally, the conductive Ti microparticles conducted the growth behavior of Ni grains by current density concentration, distorting electronic field lines and heterogeneous nucleation. Individual domains consisting of inner nanograins and outer radial columnar grains surrounded Ti microparticles, where Ti microparticles acted as seeds. Ti microparticles tended to be aggregated, leading to spatial heterogeneity of microstructures. Ni deposits buried the Ti microparticles in forms of “covering model”, contributing to the formation of inside voids and rough surface and aggregation of Ti microparticles; on the other hand, the non-conductive CeO 2 microparticles hardly changed the distribution of current density and electronic field lines on the cathode surface. Ni deposits buried the CeO 2 microparticle in forms of “stacking model”, avoiding the inside voids and aggregation of particles. The incorporation of CeO 2 microparticle brought in microstructure evolutions only on its top side without disturbing the growth behavior of Ni grains on its lateral side or bottom, suggesting the limited effects. This was correlated with the presence of current concentration above the CeO 2 microparticle at the last stage of burying CeO 2 microparticle. The co-addition of Ti microparticles and CeO 2 nanoparticles into Ni deposits exploited the complementary action of the two particles, which gave birth to satisfied spatial microstructures and improved hardness. Ti microparticles took major responsibility for microstructure evolutions, while the CeO 2 nanoparticles were mainly in charge of the microstructure homogeneity.
研究领域:
材料科学
·
电化学
✓ 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）