MICROCHEMICAL JOURNAL
·
2024
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IF 4.9
Yuanzhen He,Dengjie Zhong,Yunlan Xu,Ran Jiang,Pengfei Liao,Jiayou Zhang
In this work, Ti/SnO 2 -Sb 2 O 4 -La/β-PbO 2 electrode was successfully prepared by electrodeposition method. The surface morphology, crystal structure, elemental states and electrochemical characteristics of the electrode were examined by SEM, XRD, XPS, CV, and LSV. The results demonstrated that the conductivity, specific surface area, electrochemical oxidation performance and stability of the β-PbO 2 coated electrode with SnO 2 -Sb 2 O 4 -La as the intermediate layer were greatly improved. Under the conditions of initial rhodamine B (RhB) concentration of 20 mg/L, initial pH of 3.0, electrolyte concentration of 0.1 M, and current density of 30 mA cm −2 , the removal rates of color and TOC reached 100 % and 83.64 % after 20 mins and 30 mins, respectively. The electrode can also completely degrade methylene blue and methyl orange wastewater after 30 mins under the same conditions. The accelerated lifetime of the electrode reached 175 mins (1000 mA cm −2 , 1 M H 2 SO 4 ), and the actual lifetime was up to 3208 hrs. Based on the results of free radical quenching experiment and GC–MS detection, RhB degradation pathway was proposed: the aniline-based conjugated system of RhB molecule was attacked by the combined action of free radicals (indirect oxidation) and electrocatalysis (direct oxidation), which decomposed macromolecules into small molecules and ultimately mineralized them into CO 2 and H 2 O. This work is expected to provide a fresh research concept for preparing DSA electrodes with excellent catalytic performance and high stability.
研究领域:
环境科学
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电化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 9
·7692-7700
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IF 2.324
Hu Zhen,Guo Haiyong,Zhao Li,Wu Yadan,Wang Shimin,Wan Li
A double-layer composite film (DLCF) that consists of upconversion composite La(OH) 3 :Er 3+ /Yb 3+ +P25 (UC + P25) as underlayer and large TiO 2 spheres (LS-TiO 2 ) as overlayer is designed as the photoelectrode of dye-sensitized solar cells (DSSCs). The upconversion luminescent material La(OH) 3 :Er 3+ /Yb 3+ can convert near-infrared region to visible light to improve the light absorption, and LS-TiO 2 has been used as light-scattering layer to increase the optical length in the film and enhance light harvesting. The DLCF with lower absorbed dye achieved the highest conversion efficiency due to the synergistic effect of the upconversion luminescent layer and the light-scattering layer, and with an optimum mixing ratio, a conversion efficiency of 9.24% is attained, which is a significant improvement of 68.3% compared with the pure P25 film photoelectrode.
研究领域:
材料科学
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能源研究
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DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 29
·e02906
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IF 2
Haojun Zhang,Gengrui Zhao,Shaoting Ma,Bin Zhang
Graphical A novel method enhances triboelectric nanogenerator (TENG) output by using La-doped bismuth ferrite nanoparticles as the triboelectric layer filler. Under the filler concentration threshold, the output performance of the TENG with 1.5 wt% La-doped BFO fillers is significantly enhanced compared to that with undoped BFO fillers. Additionally, a self-powered anticorrosion system is developed using this TENG as the energy source. Incorporating high-permittivity nanoparticles as fillers into triboelectric layers is an effective strategy to enhance the output performance of triboelectric nanogenerators (TENG). However, exceeding the critical filler concentration threshold causes nanoparticle aggregation, limiting further output performance enhancement of TENG. Here, a novel approach is proposed to enhance TENG output performance by doping lanthanum (La) into bismuth ferrite (BFO), forming La-doped BFO nanoparticle fillers (BLFO) to further improve the output performance of polyvinylidene fluoride (PVDF)-based TENG without increasing filler concentration. This approach overcomes the limitation of nanoparticle aggregation at high filler loadings while significantly enhancing the output performance of TENG. Below the critical concentration threshold, the dielectric constant of BLFO/PVDF composites increases by 32% compared to undoped BFO/PVDF composites. Consequently, the BLFO/PVDF-based TENG achieves a high output voltage of 329 V and short circuit current of 44 µA, representing 43% and 69% increases over the BFO/PVDF-based TENG, respectively. Notably, these values represent 219% and 193% increases compared to the pure PVDF-based TENG. Furthermore, a self-powered anticorrosion system powered by the BLFO/PVDF TENG demonstrates effective metal protection, as evidenced by open-circuit potential measurements and reduced average corrosion rates.
研究领域:
能量收集
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材料科学
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纳米技术
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电化学
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防腐保护
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Xiaoya Zhao,Jilin Zhang,Zi Dai,Yunyun Lei,Xiaoxun Liu,Guixia Liu
Excess fluoride in drinking water from groundwater can cause dental and skeletal fluorosis affecting millions of people worldwide. Adsorption is an appealing strategy for defluoridation due to its simple operation and environmental friendliness. However, conventional adsorbents exhibit low adsorption capacity because few exposed active sites. In this work, La anchored Zr-based metal-organic framework (La-UiO-66-(COOH) 2 ) adsorbent with dual-metal sites was designed and synthesized to remove fluoride effectively. The doping of La(III) using uncoordinated carboxyl group of UiO-66-(COOH) 2 increased the adsorption capacity. The morphology, composition, structure, surface area, and thermal stability of adsorbent were carefully characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectrometer (EDX), fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) techniques. The adsorbent is a polyhedral shape with aggregated and smaller crystalline particles and La is uniformly distributed over the adsorbent, favoring the effective adsorption of fluoride. La-UiO-66-(COOH) 2 showed excellent adsorption performance in a wide pH range of 3–9, and the maximum adsorption capacity was 57.23 mg g −1 . The fluoride removal rate of as-prepared adsorbent reached as high as 87 % within 5 min. The adsorption process conformed to the pseudo-second-order equation model and the Freundlich isotherm model. Thermodynamic research indicated that the adsorption process was spontaneous and endothermic. After four adsorption-desorption cycles, the fluoride removal rate of the adsorbent was still retained at 79.7%. The design of dual-metal site adsorbents provides a potential strategy for highly efficient removal of fluoride.
研究领域:
环境科学
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材料科学
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水处理
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2012
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IF 3.456
Yu Zhang,Ruo Yuan,Yaqin Chai,Xia Zhong,Huaan Zhong
A novel material, sol–gel derived La(OH) 3 nanorods (La(OH) 3 NRs) with excellent film forming ability was prepared, and it was first designed to incorporate with carbon nanotubes (CNTs) to modify glassy carbon electrode (GCE) to simultaneously voltammetric determine ascorbic acid (AA), dopamine (DA), uric acid (UA), and nitrite (NO 2 − ). Cyclic voltammetry (CV), transmission electron microscopy (TEM), and X-ray diffraction (XRD) were employed to characterize the sensor. Under optimal conditions, the linear response range for AA, DA, UA, and NO 2 − were 0.5 μmol L −1 to 1.46 mmol L −1 , 50 nmol L −1 to 35.36 μmol L −1 , 50 nmol L −1 to 0.79 mmol L −1 , and 0.55 μmol L −1 to 0.72 mmol L −1 , respectively and the detection limits were 1.67 μmol L −1 , 1.67 nmol L −1 , 1.67 nmol L −1 , and 0.18 μmol L −1 . The sensor demonstrated well stability, high selectivity and sensitivity. More importance, this material can be extended to construct other electrochemical sensors by the immobilization of enzymes and antibodies.
研究领域:
分析化学
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Water
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2022
·Vol. 14
·期 19
·2946
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IF 3.53
Chaomin Jia,Yijia Fan,Ruolan Jiang,Peidong Su,Shuai Liu,Xiaohui Zhang,Jianbing Wang
Excessive fluoride in mine water has become a major concern because it can cause detrimental effects to human health. Nevertheless, the removal efficiency of traditional adsorbents is far from satisfactory. Herein, La and Fe bimetallic supported zeolite was synthesized by co-precipitation method, for efficient defluoridation. The defluoridation performance of La-Fe zeolite was studied by a batch adsorption experiment and dynamic adsorption column test. Results indicated that the removal efficiency of F−was 99.04% under the optimal conditions (4 h, adsorbent dosage 8.0 g/L, agitation rate 200 rpm/min, temperature 298K and pH = 6 ± 1) that were determined through the batch adsorption experiments. CO32−and HCO3−can inhibit the defluorination effect of La-Fe zeolite. The adsorption of fluoride ions on La-Fe zeolite can be well described by the Langmuir adsorption model, and the maximum fluoride ion adsorption capacity is 2.64 mg/g. The test of dynamic adsorption column shows that the adsorption efficiency of F−by La-Fe zeolite on was higher than 85% for continuous adsorption of 9 h, indicating that La-Fe zeolite has good practical applications. The mechanism analysis indicated that the adsorption of fluoride ion by La-Fe modified zeolite involves both ion exchange and complexation, which belongs to the physicochemical process.
研究领域:
环境科学
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水处理
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材料科学
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化学工程
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DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
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2019
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IF 1.918
Chenghuan Yang,Liang He,Qingqing Guan,Jiajing Chen,Rongrong Miao,Lei Tao,Ningmeng Hu,Bin Li
Enhancement of the transesterification efficiency of triglyceride has come under heated study in biodiesel-making industry. In this research, the NiMo/La-Al2O3 nanopowders have been prepared for producing biodiesel efficiently. The screening test showed that the NiMo/La-Al2O3 catalyst has the best catalytic activity for triglyceride transesterification. Besides, the process parameters including reaction temperature, time, oil-to-alcohol ratio and catalyst loading etc., also have been investigated for optimization of the transesterification process. The results showed that with 5 wt% of catalyst loading, and oil to methanol molar ratio of 1:9, the conversion yield of triglyceride could be up to 95.2% within 120 min at 160°C. The NiMo/La-Al2O3 catalyst has the outstanding recycle property, which proved that the prepared NiMo/La-Al2O3 powders can be suitable for biodiesels’ production.
研究领域:
化学工程
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催化
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可再生能源
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生物柴油生产
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Shanshan Song,Yijun Gao,Linbo Cao,Ho Seok Park,Zhiliang Liu,Fei He,Wenwu Li,Meilin Liu,Piaoping Yang
Solid polymer electrolytes have emerged as promising materials for next-generation lithium metal batteries due to their enhanced safety and high energy density potential. However, their widespread adoption is hindered by slow ion transport and inefficient lithium-ion (Li + ) selectivity. To overcome these limitations, this study introduces a composite electrolyte by incorporating functionalized La(OH) 3 nanofibers with oxygen vacancies into a Poly(ethylene oxide) (PEO) matrix. These nanofibers, synthesized via a simple method, are designed to improve Li + mobility by leveraging their oxygen vacancies to immobilize TFSI − anions from the bis(trifluoromethanesulfonyl)imide (LiTFSI). Simultaneously, amino groups on the nanofiber surface act as binding sites, facilitating lithium salt dissociation and creating supplementary ion transport pathways. Density functional theory (DFT) and molecular dynamics (MD) simulations reveal that the functionalized La(OH) 3 nanofibers effectively suppress TFSI − anion movement while reducing the energy barrier for Li + migration. This mechanism elevates the Li + transference number to 0.51, a significant improvement over the conventional PEO-based electrolytes. The composite electrolyte exhibits excellent performance in Li||Li cells, maintaining stable cycling for over 600 h at a current density of 0.38 mA cm −2 . Furthermore, a solid-state LiFePO 4 ||Li battery demonstrates highly reversible capacities of 100.2 mAh g −1 after 600 cycles at 8C. By combining anion confinement strategies with tailored electronic interactions, this work provides a practical approach to advancing solid-state battery performance. The findings not only highlight the potential of La(OH) 3 -PEO composite electrolytes but also establish a new framework for optimizing ionic conductivity through targeted molecular design.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
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2018
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IF 5.807
Taiwan Liao,Ting Li,Xiangde Su,Xiang Yu,Huiyu Song,Yi Zhu,Yuanming Zhang
A series of La(OH) 3 -modified magnetic pineapple biochar (La x -MC) with different contents of La(OH) 3 were prepared and used as phosphate adsorbents for the first time. With the increase of La(OH) 3 content, the adsorption capacity for phosphate increased while the magnetic property decreased. La10-MC exhibited excellent magnetic property for easy recovery and high adsorption capacity up to 101.16 mg P/g, which was 27 times that of pineapple biochar and much higher than most phosphate adsorbents. Adsorption isotherm and adsorption kinetics were better fitted by Langmuir model and pseudo second-order model, respectively. The removal efficiency >96.04% in coexisting ions indicated its high selectivity to phosphate. Little decrease in removal efficiency after three adsorption-desorption cycles suggested its excellent stability and cyclic utilization. Leaching study demonstrated the negligible risk of La 3+ and Fe 3+ leakage during adsorption process. Mechanism study revealed that the adsorption mechanism involved precipitation, electrostatic interaction, ligand exchange and inner-sphere complexation.
研究领域:
环境科学
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材料科学
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水处理
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产品关联
DOI
PubMed
高影响因子
Asia-Pacific Journal of Chemical Engineering
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2025
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IF 1.6
ShaoJie Hong,Bin Guo,XiangQian Ren,Yang Cao,XiuMin Xu,Xingfu Zhou
The practical application of conventional Ti/SnO 2 -Sb electrodes is hindered by their low oxygen evolution potential (OEP) and rapid deactivation. Rare earth doping has been proposed to enhance electrode stability and catalytic activity; however, the comparative effects of different rare earth elements (e.g., La vs. Eu) on both structural and electrochemical properties remain unclear. In this paper, the fabrication of lanthanum- and europium-doped Ti/SnO 2 -Sb (TSS) electrodes and the electrochemical degradation of methylene blue (MB) were investigated. Although both lanthanum (La) and europium (Eu) are rare earth elements with many similarities, lanthanum (La)-modified electrode exhibits distinct performance characteristics. It is indicated that the Ti/SnO 2 -Sb-La (TSSL) electrode has a comparatively better crystal phase, enhanced surface hydrophobicity, and better electrochemical performance. The TSSL electrode exhibits a higher OEP of 1.84 V than other electrodes, showing a 0.15 V increase when compared with the undoped electrode. The peak oxidation current reaches 0.82 mA/cm 2 , which provides more active sites for the catalytic reaction. It is found that the La-doped electrode has better performance in wastewater treatment; the TSSL electrode shows a 45% increase in degradation efficiency when compared with the Ti/SnO 2 -Sb-Eu (TSSE) electrode for treatment of 50 ppm MB in 25 min. Moreover, the effects of current density and the initial concentration of MB were also investigated. Considering the degradation rate and energy consumption, the optimum current density for wastewater treatment is 20 mA/cm 2 . The outcome indicated that the degradation of MB was up to 98.5% in 25 min.
研究领域:
电化学
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环境工程
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材料科学
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水处理技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Xiufen Yang,Runzhi Han,LiWei Shi,YiXin Li,Changyong Lan,Leiming Chen,Chuanfu Huang
To address the persistent challenges of wide band gap (2.13 eV), high carrier recombination rates, and poor cycling stability in bismuth ferrite (BiFeO 3 BFO)-based photocatalysts, this study introduces an unprecedented La³⁺/Ti⁴⁺ dual-site doping strategy. La/Ti co-doped BFO nanoparticles (n% BLFTO) were synthesized using a sol-gel method. The synergistic effects of La³⁺-induced gradient oxygen vacancies (increased by 270%) and Ti³⁺/Ti⁴⁺ redox couples led to a significant band gap narrowing to 1.79 eV, extending visible light absorption to 450-700 nm. Remarkably, the optimized 30% BLFTO sample achieved a 98.9% degradation efficiency of Rhodamine B (Rh B) within 120 minutes-7.17% higher than pure BFO and maintained 95.92% efficiency after 12 cycles (2.98% decay), demonstrating exceptional stability rarely reported in prior works. In-situ X-ray Photoelectron Spectroscopy and Photoluminescence Spectroscopy analyses revealed that dual-doping synergistically modulates carrier dynamics via Fe²⁺/Fe³⁺ mixed valency and abundant oxygen vacancies, thereby prolonging carrier lifetimes and enhancing photocatalytic activity. This work pioneers a dual-doping framework that simultaneously enables highly efficient visible-light-driven degradation of Rh B and exceptional cycling stability, offering new insights for the design of robust photocatalysts for environmental remediation and renewable energy applications.
研究领域:
材料科学
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环境科学
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光催化
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纳米技术
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固态化学
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产品关联
DOI
高影响因子
CHEMICAL GEOLOGY
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2025
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IF 3.6
Changjin Liang,Honghai Wu,Yaowei Li,Yufeng Guan
Ferrihydrite (Fh) can usually transform into phases with higher crystallinities. This may greatly alter Fh adsorption capacity for chromium ions, thereby affecting their immobilizations and fates. Foreign elements [e.g., lanthanum (La)] as impurities can become incorporated into Fh. Herein, the effect of La-substitution into Fh and the influence of the presence of Cr(VI) on Fh phase transformation and fate of Cr(VI) were investigated. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Electro-chemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy (XPS) and other test methods were employed to probe phase changes after the Fe(II)-induced La-substituted Fh (La-Fh) transformations. At pH 5.5, no neoformed phase was observed until 7 d for La-Fh or pure Fh at 1 mM Fe(II) aq, but all La-Fh systems underwent transformations at 5 mM Fe(II)aq. A low pH and Fe(II)aq level favored lepidocrocite (Lp) to form, whereas goethite (Gt) was the predominant phase rather than Lp as pH increased to 7.2 with higher level Fe(II)aq. However, the La-substitution inhibits the La-Fh transformation rate and path. This made 5 % La-Fh transformed to Lp after 30 d at pH 7.2 and 1 mM Fe(II)aq. The La-release was present to some extent during the transformation process. Either the inhibition to La-Fh transformation or the La-slow release favors the retention of early-adsorbed Cr(VI) on iron-mineral surface. The added Cr(VI) might promote the La-Fh transformation even under a lower-level Fe(II), primarily attributed to the rapid reduction of Cr(VI) to Cr(III) by Fe(II), which produced more liable Fe(III) in addition to the Cr(III) that can improve the mineral conductivity, thereby enhancing the La-Fh transformation. Mechanisms responsible for the Fe(II)-induced La-Fh transformation companying the La slow-release are proposed to provide insights into the reduction and immobilization of Cr(VI) under anaerobic conditions, thus demonstrating that La-Fh is a promising material for application in Cr-contaminated site remediation.
研究领域:
环境化学
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地球化学
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土壤科学
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材料科学
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环境修复
✓ 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）