CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bo Feng,Kaining Sun,Guangbo Che,Tianyi Yang,Yongya Zhang,Qianqian He,Tianrui Chang,Lijing Wang,Renquan Guan
To address the need for efficient catalysts that excel in persulfate (PDS) activation and carrier extraction, a gadolinium oxide (Gd 2 O 3 ) modified strontium titanate (SrTiO 3 ) photocatalyst has been devised for the photo-Fenton reaction, targeting the degradation of tetracycline and ciprofloxacin. This innovative photocatalyst harnesses the formation of a heterojunction between Gd 2 O 3 and SrTiO 3 , which dramatically enhances PDS activation and boosts carrier extraction efficiency by 6.8 times. Notably, it achieves approximately 90% degradation of tetracycline across various pH levels and approximately 80% degradation of ciprofloxacin under acidic and neutral conditions. Importantly, the photocatalytic treatment significantly mitigates the biotoxicity of the degraded antibiotics, emphasizing its environmental safety and efficacy. The underlying mechanisms of PDS activation and carrier transport have been rigorously verified through theoretical calculations, while the potential photocatalytic pathways and mechanisms of antibiotic degradation have been elucidated using Fukui function analysis and liquid chromatography-mass spectrometry (LC-MS). This comprehensive approach underscores the photocatalyst’s potential for advanced environmental remediation applications.
研究领域:
环境科学
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材料科学
·
化学工程
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产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2021
·
IF 2.161
Yumin He,Pengcheng Li,Haohao Ren,Xi Zhang,Xiulian Chen,Yonggang Yan
A series of neutron absorbing materials with good neutron absorbing capacity, high strength and good thermal property were designed and prepared in this work. First of all, polyphenylene sulfide containing different mole content of salicylic acid (SAPPS) in the main chain was synthesized by nucleophilic substitution polymerization under high pressure. Then the composites with different content of nano Gd2O3 and modified PPS were prepared by melt blending method. The testing results indicated that the copolymers SAPPS were synthesized successfully, there was an interface interaction between nano Gd2O3 and the matrix without the need for surfactants or coupling agents. Additionally, the content of nano Gd2O3 had no obvious influence on the thermal property of the composites. While following with the increase of the content of nano Gd2O3, the tensile strength of the composites increased firstly and then decreased, when the content of nano Gd2O3 was 10 wt%, the tensile strength of 10%Gd2O3/5%SAPPS reached the maximum value of 74.9 MPa. The results of neutron shielding testing indicated that the content of nano-particles had a large effect on the neutron shielding rate of composites. The neutron shielding rate of 50%Gd2O3/5%SAPPS composite was up to 83%. All of these results indicated that the Gd2O3/5%SAPPS had potential to be applied to the high-temperature resistance and thermal shielding materials in nuclear and aerospace applications.
研究领域:
材料科学
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核工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wanli Zhang,Meigui Ou,Chunlin Yang
In this paper, erbium-doped gadolinium oxide rare earth oxide nanoparticles (Gd 2 O 3 :Er 3+ ) with good light absorption capacity from the visible to the infrared region were prepared by polyol method, and then compounded with TiO 2 by hydrothermal method. SEM, TEM, XPS, UV–vis and electrochemical workstation were used to study the morphology, structure, UV–vis light absorption and photoelectrochemical (PEC) properties of Gd 2 O 3 :Er 3+ /TiO 2 . The results showed that the Gd 2 O 3 :Er 3+ spherical nanoparticles with a particle size of about 15 nm were uniformly distributed on the surface of the TiO 2 nanorod array, and the Gd 2 O 3 :Er 3+ /TiO 2 nanocomposites had good light absorption capacity in the infrared region. Furthermore, the photocurrent densities of Gd 2 O 3 /TiO 2 and Gd 2 O 3 :Er 3+ /TiO 2 were 2.08 and 2.75 times higher than those of TiO 2 , respectively, manifesting that the broadening of infrared light absorption can improve the PEC property of TiO 2 . Meanwhile, the DFT calculation results showed that the energy band of Gd 2 O 3 :Er 3+ /TiO 2 was significantly narrower than that of TiO 2 , indicating that Gd 2 O 3 :Er 3+ /TiO 2 had a redshift phenomenon of UV–vis absorption. The calculation results of state density showed that the f orbital of Gd 2 O 3 :Er 3+ intersected with the d orbital of TiO 2 , indicating that there is an electron transfer between Gd 2 O 3 :Er 3+ and TiO 2 .
研究领域:
材料科学
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光催化
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理论计算
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2022
·Vol. 20
·期 3
·1855-1864
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IF 2.328
Shi Fu,Zengchao Yang,Honghua Li,Liang Wang,Yong Li,Jiangtao Li
Si 3 N 4 ceramics were prepared by gas pressure sintering at 1900°C for 12 h under a nitrogen pressure of 1 MPa using Gd 2 O 3 and MgSiN 2 as sintering additives. The effects of the Gd 2 O 3 /MgSiN 2 ratio on the densification, microstructure, mechanical properties, and thermal conductivity of Si 3 N 4 ceramics were systematically investigated. It was found that a low Gd 2 O 3 /MgSiN 2 ratio facilitated the thermal diffusivity of Si 3 N 4 ceramics while a high Gd 2 O 3 /MgSiN 2 ratio benefited the densification and mechanical properties. When the Gd 2 O 3 /MgSiN 2 ratio was 1:1, Si 3 N 4 ceramics obtained an obvious exaggerated bimodal microstructure and the optimal properties. The thermal conductivity, flexural strength, and fracture toughness were 124 W·m −1 ·k −1 , 648 MPa, and 9.12 MPa·m 1/2 , respectively. Comparing with the results in the literature, it was shown that Gd 2 O 3 -MgSiN 2 was an effective additives system for obtaining Si 3 N 4 ceramics with high thermal conductivity and superior mechanical properties.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 5
·5008-5013
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IF 2.195
Du Liting,Liu Li,Tang Xiaonian,Li Yu,Xu Suyan,Gong Yimin,Yang Yang
Pure Fe 2 O 3 microspheres and Gd 2 O 3 /Fe 2 O 3 loose microspheres were synthesized successfully by a facile hydrothermal method and followed with calcined. The structure and elemental composition were provided by the X-ray powder diffraction (XRD) and energy-dispersive spectroscopy (EDS). Additionally, the morphology was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM), which show the loose surface state of Gd 2 O 3 /Fe 2 O 3 microspheres. Finally, the property of the gas-sensing sensor based on Gd 2 O 3 /Fe 2 O 3 loose microspheres was investigated systematically. It exhibits ultrahigh sensitivity of 268.6 to 100 ppm acetone at low operating temperature 220 °C, which is 9.8 times higher than the pure Fe 2 O 3 microspheres sensor (27.5/100 ppm). Remarkably, the response of Gd 2 O 3 /Fe 2 O 3 loose microspheres sensor to 0.1 ppm acetone is 2.3. Furthermore, the sensor shows fast response and recovery time (6/36 s) and splendid selectivity to acetone.
研究领域:
材料科学
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传感技术
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 19
·14123-14128
·
IF 3.84
Yue Tian,Bining Tian,Cai'e Cui,Ping Huang,Lei Wang,Baojiu Chen
Yb3+/Er3+ codoped spherical Gd2O3 phosphors with different particle sizes were prepared via a urea-assisted homogeneous precipitation process by adjusting the molar ratio of rare earth ions and urea followed by annealing at high temperature. The phases, morphologies, and luminescence properties of the as-prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and upconversion luminescence (UCL) spectra, respectively. The spherical Gd2O3:Yb3+/Er3+ phosphors showed size-dependent upconversion luminescence properties under the excitation of 980 nm-laser. The temperature sensing behavior of spherical Gd2O3:Yb3+/Er3+ phosphors with different particle sizes was studied based on the change of emission intensities from two thermally coupled 2H11/2 and 4S3/2 levels. It is interesting to observe that the sensing sensitivity of the sample increases with decreasing particle size and a sensitivity of 84 × 10−4 K−1 was obtained for the sample with a particle size of 45 nm. Finally, Judd–Ofelt theory was used for explaining and predicting the effect of particle size on sensing sensitivity.
研究领域:
材料科学
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无机化学
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光学材料
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生物医学工程
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纳米技术
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 8
·082512
·
IF 4.316
Nan Ji,Tiejian Zhu,Hao Peng,Feng Jiang,Wei Huang,Yu Gong
In the common spent fuels, actinides and fission products are generally in the form of oxide, so direct dealing with oxide will be the most convenient way for spent fuel reprocessing. In this work, the electrolytic reduction of Gd2O3 has been studied in LiCl-KCl-Li2O (1 wt%) melts at different conditions, and the effect of sintering temperature on the porosity of Gd2O3 powder and the electrochemical behavior of Li2O in LiCl-KCl molten salt were investigated, too. The diffusion coefficient of O2− was calculated to be 2.0 × 10−5 cm2·s−1 in LiCl-KCl melts on the Mo electrode at 923 K by cyclic voltammetry (CV). The electrode process of Gd2O3 powder was also analyzed in LiCl-KCl-Li2O (1 wt%) melts, and the formation process of composite oxide LiGdO2 was determined. By the analysis of XRD and oxygen content characterization, it was suggested that after 74 h electrolysis (923 K, 3.40 V), the oxygen content of Gd2O3 cathode decreased from 12.25 wt% to 1.41 wt%, indicating 88.5% Gd2O3 was reduced to metal.
研究领域:
核化学与核燃料循环
·
电化学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 13
·H669
·
IF 3.12
Chao Liu,Tian Jiang,Dexing Zhang,Maoguo Li
The routine analysis and detection of organophosphate pesticides (OPPs) in consumer products has become an important activity, due to organophosphate insecticides' extensive applications in agriculture and pest control. We have prepared Gd2O3 hollow nanospheres to fabricate the modified electrode for enzyme-free detection of methyl parathion (MP), one of the most commonly used OPPs. The electrochemical responses of MP on the Gd2O3 hollow nanosphere modified glassy carbon electrode (Gd2O3/GCE) were investigated in detail. Furthermore, the current of the differential pulse voltammetry (DPV) is linear, with the MP concentration moving from 0.05 μM to 100 μM. It is demonstrated to be a sensitive and simple electrochemical method for the sensing of MP with a low detection limit (0.03 μM). The as-prepared electrode also shows a long-time stability and an acceptable selectivity. The Gd2O3/GCE is applicable for detecting MP in real samples, such as vegetables, tap water, and paddy field water, with satisfactory results. Therefore, the proposed method is promising for the routine analysis and detection of MP residues in foods and environments.
研究领域:
环境科学
·
分析化学
·
农药残留检测
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 103
·101707-101713
·
IF 3.289
Shengjun Zhang,Jiajia Zhou,Ruozhen Wu,Lei Lei,Zhen Xiao,Junjie Zhang,Shiqing Xu
Lanthanide (Ln3+)-doped nanoparticles that produce strong red upconversion (UC) luminescence are desirable for biological applications. For nanoparticles, modification of their electronic properties and stabilization of their crystallographic phase are crucial for tuning their luminescence behaviors. Here, Yb3+–Er3+ doped Gd2O3 nanoparticles have been synthesized by calcining Gd2O2S in nitrogen (O2-free) and ambient air (∼21% O2), respectively. Various approaches including X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy and thermo-gravimetric and differential thermal analyses (TG-DTA) were used to characterize the structure, morphology and phase formation mechanism of the nanoparticles. Upconversion luminescence properties were investigated by emission intensity vs. excitation power (double logarithmic relationship) and temperature dependent emission spectroscopy. The different splitting transition probabilities of the cubic and/or monoclinic phase, the probability of multiphonon relaxations and cross relaxations between Er3+ ions are responsible for the efficient red emission in the cubic Gd2O3 nanoparticles. More importantly, the lower phonon energy of the pure cubic sample has good thermal stability in the current detectable range of 20–100 °C. These results imply that the cubic Gd2O3 upconversion nanoparticles may have multiplexing functionality in bio-imaging.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Jun Liu,Huawei Deng,Fengzhen Lv,Wenjie Kong,Dihu Chen,Fuchi Liu,Lizhen Long
The large number of energy levels available to lanthanide ions makes the emission mechanism of lanthanide-doped luminescent materials extremely complicated. Herein, we focus on the discussion and analysis of luminescence manipulation in Gd 2 O 3 :Yb 3+ /Er 3+ nanocrystals and systematically investigate ion-ion interaction–induced energy transfer in up- and downconversion processes to shed light on the manipulation mechanism, showing that the luminescence of the above nanocrystals can be controlled by varying the content of Yb 3+ . Based on Dexter's energy transfer theory and the fact that excitation of Er 3+ ions results in the appearance of emission attributed to the 2 F 5/2 → 2 F 7/2 transition of Yb 3+ in the near-infrared region (950–1100 nm), this behavior is ascribed to the occurrence of energy transfer from Er 3+ to Yb 3+ .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 29
·期 1
·43-50
·
IF 2.961
Zhang Bao,Zhang Yannan,Duan Jianguo,Li Xue,Zeng Xiaoyuan,Zhou Kai,Wang Zhengwu,Lian Zheng,Dong Peng,Zhang Yingjie
As one of the most potential positive materials for cobalt-free lithium ion batteries, the lithium manganate cathode materials are extremely attractive because of their low-cost and low toxicity compared to other cathode materials, but they still suffer from the serious capacity fading because of the transition metal dissolution (Mn). Herein, a layer of Gd 2 O 3 coating is coated on the surface of lithium manganate by a simple wet chemical method. The Gd 2 O 3 coating can reduce the side reactions as well as Mn dissolution by suppressing the direct contact between the electrolyte and the positive electrodes. Consequently, the modified spinel LiMn 2 O 4 @Gd 2 O 3 electrode has delivered significantly improved electrochemical performance. ICP measurements demonstrate that the amount of manganese dissolved in electrolyte is effectively decreased, which is approximately one-third of the pristine sample. Thus, the LiMn 2 O 4 @Gd 2 O 3 provides higher capacity retention at both low current density (1 C) and high current density (5 C). This work reveals that the Gd 2 O 3 coating is a straightforward but effective strategy of enhancing the structural stability and inhibition of Mn dissolution of spinel Mn-based positive electrodes.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Dan Wang,Yunhong Xie,Lingfan Xu,Yixuan Zhou,Kai Li,Zhongfeng Li
The development of bifunctional nanoplatform-based theranostics has garnered considerable attention in cancer therapy research. In this study, we engineer Gd2O3@SiO2-CuS nanorods as an integrated diagnostic-therapeutic system, simultaneously harnessing photothermal conversion and paramagnetic properties for MRI-assisted photothermal intervention. Hydrothermally synthesized Gd2O3 nanorods demonstrate superior T1-weighted contrast performance, achieving a longitudinal relaxivity (r1) of 4.2 mM–1·s–1, which compares favorably with that of commercial contrast agents. Furthermore, the strategically integrated CuS component exhibits remarkable photothermal conversion efficiency (19.6%) and sustained therapeutic stability. These attributes pave the way for achieving the application objective of magnetic resonance imaging-assisted photothermal therapy. Critically, comprehensive biosafety evaluations, including hemocompatibility assays and cytotoxicity profiling, confirm the nanocomposite’s favorable biocompatibility. The findings underscore the substantial potential of Gd2O3@SiO2-CuS nanorods for image-guided photothermal therapy applications.
研究领域:
医学影像学
·
纳米医学
·
癌症治疗
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）