Advanced Science
·
2024
·
IF 14.3
Zichen Zheng,Kewei Liu,Yiwen Zhou,Kaichun Xu,Yifan Luo,Jiabao Ding,Carla Bittencourt,Marc Debliquy,Chao Zhang
La-decorated Bi 2 O 2 CO 3 (BCO-La) microspheres are synthesized using a facile wet chemical strategy for sensing low-concentration nonanal (C 9 H 18 O) at room temperature. These BCO-La gas sensors are applied to evaluate agricultural product quality, specifically for cooked rice. The sensitivity of the BCO-6La sensor significantly surpassed that of the pure BCO sensor, achieving a response value of 174.6 when detecting 30 ppm nonanal gas. Notably, the BCO-6La sensor demonstrated a faster response time (36 s) when exposed to 18 ppm of nonanal. Additionally, the selectivity toward nonanal gas detection is higher (approximately 4–24 times) compared to interfering gases (1-octanol, geranyl acetone, linalool, hexanal, 2-pentyfuran, and 1-octen-3-ol) during cooked rice quality detection. The gas sensing mechanism and the factors contributing to the enhanced sensing performance of the BCO-La microspheres are demonstrated through in situ FT-IR spectra and DFT analysis while the realistic detection scenario is carried out. In a broader context, the reported sensors here represent a novel platform for the detection and monitoring of gases released by agricultural products during storage.
研究领域:
材料科学
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传感器技术
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农业科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zelin Shan,Fang Ma,Minghan Xu,Xiaoqing Shan,Lianbin Shan,Chongwei Cui,Haijuan Guo
Improving the yield of reactive oxygen species and inhibiting the recombination of photogenerated e - and h + have been reliable strategies to accelerate the rate-limiting step for nano photocatalytic materials. A novel magnetic Fe 3 O 4 @La-BiFeO 3 composite with variable molar ratios was successfully synthesized via a facile hydrothermal method for the photo-Fenton-like degradation of norfloxacin (NOR) under visible light irradiation. The comprehensive characterization of the crystal phase purity, morphological structure and elemental composition of the catalyst confirmed the formation of a heterojunction structure between Fe 3 O 4 and La-BiFeO 3 . The effects of the composite molar ratio, initial pH, catalyst addition, and H 2 O 2 concentration on the degradation efficiency were investigated. 20% Fe 3 O 4 @La-BiFeO 3 showed the best catalytic activity with 93.8% removal of NOR after 60 min of reaction and the pseudo-first-order rate constant was 0.05952 min −1 , attributed to the synergistic interaction of the photocatalytic and Fenton-like processes. The excellent stability and recyclability of the catalyst ensured the catalytic reactions continued to occur efficiently. The appropriate amount of Fe 3 O 4 reduced the band gap of the catalyst, and the introduction of a weak magnetic field accelerated the transfer of electrons between interfaces, effectively restrained the recombination of photogenerated e - /h + and directly enhanced the yield of ·OH and O 2 · - . This work not only realized the preparation of a heterogeneous photo-Fenton-like catalyst with high application potential for the degradation of antibiotics, but also provided new prospects for designing efficient catalysts on the basis of theoretical guidance.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
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IF 3.387
Xin Liu,Junzhe Jiang,Yushuai Jia,Jinmin Qiu,Tonglin Xia,Yuhong Zhang,Yuqin Li,Xiangshu Chen
The efficient treatment of dye wastewater has been a hot topic of environment field. The integration of adsorption and photocatalytic degradation via fabrication of bi-component heterojunction photocatalyst is considered as a facile and effective strategy to enhance the dye elimination efficiency. In this report, a Z-scheme heterojunction material, SrTiO 3 (La,Cr)/WO 3 with bifunction of adsorption and photocatalysis was successfully synthesized for efficient removal of methylene blue (MB) under visible light irradiation. The morphology and microstructure characterization demonstrates that the SrTiO 3 (La,Cr) nanoparticles are uniformly decorated on the WO 3 nanosheets, forming an intimate heterojunction interface. MB degradation results indicate that the removal efficiency by the synergistic adsorption-photocatalysis process is greatly improved compared to pure WO 3 and SrTiO 3 (La,Cr) with the adsorption and photocatalytic activity closely related to the composition of the material. The possible mechanism for the enhanced photocatalytic activity could be ascribed to the formation of a Z-scheme heterojunction system based on active species trapping experiments. Furthermore, the investigations of adsorption kinetics and isotherm show that the adsorption process follows pseudo-second-order kinetic model and Langmuir isotherm, respectively. Due to the synergistic advantages of negative zeta potential, large surface area and accelerated separation of photogenerated carriers driven by Z-scheme heterojunction, SrTiO 3 (La,Cr)/WO 3 exhibits excellent adsorption-photocatalytic performance and stability on MB removal, which could be potentially used for practical wastewater treatment.
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
Royal Society Open Science
·
2022
·Vol. 9
·期 9
·
IF 3.653
Haijun Cheng,Chang Yu,Hongyun Wang,Xiongmin Liu,Li Ma,Fang Lai
It has been a challenge to synthesize macrolide musk in excellent yields with high purity. KF-La/γ-Al2O3 catalyst was prepared from a highly basic mesoporous framework using a mild method. The prepared KF-La/γ-Al2O3 catalyst was employed for the synthesis of cyclopentadecanolide from methyl 15-hydroxypentadecanoate. The morphology and structure of prepared catalysts were characterized using XRD, TG-DTG, SEM, EDX, TEM, BET and CO2-TPD. The results revealed that the K3AlF6 and LaOF are produced on the surface of KF-La/γ-Al2O3, and LaO can promote the dispersion of KF on the surface of Al2O3. Catalysts pore size main distribution ranges between 10 and 30 nm, the maximum CO2 desorption temperature is 715°C when the La loading is 25%. Because F− ion has a higher electronegativity than O2− ion, the KF-promoted metal oxide (Al2O3 or/and La2O3) contained more strong basic sites, compared with that of the corresponding metal oxide. The yield of cyclopentadecanolide obtained at 0.5 g KF-25La/γ-Al2O3 catalyst and a reaction temperature of 190°C for 7 h were 58.50%, and the content after reactive distillation is 98.8%. The KF-La/γ-Al2O3 catalyst has a larger pore size and basic strength, which is more conducive to the macrolactonization of long-chain hydroxy ester.
研究领域:
有机化学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
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IF 3.171
Qing Shu,Xinyuan Liu,Yanting Huo,Yuhui Tan,Caixia Zhang,Laixi Zou
A novel solid Brönsted-Lewis acid catalyst La-PW-SiO 2 /SWCNTs (single-wall carbon nanotubes) was synthesized from the synergistic modification of H 3 PW 12 O 40 (HPW) by single-walled carbon nanotubes functionalized with sidewall hydroxyl groups (SWCNTs–OH) and La 3+ via sol–gel method. The freshly prepared catalyst was characterized by several methods, and the catalytic activity and stability of it were studied from the esterification of oleic acid and methanol. Results showed that the highest conversion of oleic acid was 93.1% (mass) and maintained as high as 88.7% (mass) after six cycles of La-PW-SiO 2 /SWCNTs. The high catalytic activity and stability of La-PW-SiO 2 /SWCNTs can be attributed to the strong electron withdrawing effect of La 3+ on π bond of SWCNTs , because it can facilitate the formation of a large number of strong Lewis acid sites. Therefore, the reduction of catalytic activity of a solid acid catalyst due to the fact that hydration reaction of its Brönsted acid sites can be effectively reduced. La-PW-SiO 2 /SWCNTs can be an efficient and economical catalyst, because it shows good catalytic activity and stability.
研究领域:
化学工程
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催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
TRANSITION METAL CHEMISTRY
·
2023
·Vol. 48
·期 2
·125-133
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IF 1.7
Hu Yi,Xu Jingsong,Zhang Tianzhu,Zhong Hang,Chen Jun,Liu Xinai,Pan Qifa,Liu Ruidong,Jiang Chunli,Chen Jun
Electrocatalytic water splitting to produce hydrogen is a promising route to provide green hydrogen on a large scale. To explore non-noble metal electrocatalysts with high performance is still a challenge. Herein, a one-step electrodeposition way is developed to construct the heterostructural (NiO-La 2 O 3 )/(Ni-La)/NiO/Ni electrocatalysts on Ni foam. The dark Ni-La coating was prepared by co-electrodeposition from an aqueous solution containing LaCl 3 and NiCl 2 with a molar concentration ratio of 1:5. Among these heterostructural Ni-based electrocatalysts, an excellent HER activity is achieved: an overpotential of 22 mV at the current density of 10 mA cm −2 in 1 M KOH solution. It is demonstrated that the introduction of La significantly reduces the overpotential for HER. The higher the La content in the Ni-La coating of these electrocatalysts, the better the electrocatalytic HER performance was exhibited. This work provides a facile and inexpensive route to prepare Ni-La coating on electrodes in an aqueous solution.
研究领域:
材料科学
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电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wei Zeng,Sheng-Qi Su,Ying-Min Qin,Jing-Zhe Wu,Jiang-Nan Ke,Yong-Gang Sun,Xi-Jie Lin
Ni-rich layered oxides offer numerous advantages such as high discharge capacity, cost-effectiveness, and environmental friendliness, making them the mainstream cathodes for high-energy density lithium-ion batteries. However, their widespread commercialization is hindered by critical challenges in cycling performance, stemming from unstable interface and structure, particularly at elevated charge cut-off voltages. Herein, a dual-modification strategy combining La doping and La 4 NiLiO 8 coating was proposed to synergistically enhance the surface/interface and structure stability of the LiNi 0.83 Co 0.11 Mn 0.06 O 2 (referred to as NCM83) cathode. Unlike conventional methods, a well-designed La(OH) 3 coating pretreatment was employed on the Ni 0.83 Co 0.11 Mn 0.06 (OH) 2 precursor. This pretreatment aimed to facilitate the in-situ formation of La doping and La 4 NiLiO 8 during the lithiation of the coated precursor, while ensuring desired uniformity of the La 4 NiLiO 8 coating and La doping. This dual-modification strategy integrated the advantages of both La doping and La 4 NiLiO 8 coating, demonstrating excellent capability to improve the overall performance of NCM83. The La doping, acting as a pillar, not only strengthened the layered structure of the cathode to mitigate volume changes, but also enhanced Li + diffusion by broadening the c axis spacing. The La 4 NiLiO 8 coating efficiently protected the cathode from H 2 O/CO 2 attack and electrolyte erosion, while also facilitating Li + transport owing to its favorable Li-conductive properties. Such a dual-modification strategy significantly enhanced the electrochemical performance of NCM83, as demonstrated by the excellent long-term cyclic stability, rate capability, and thermal stability at a high charge cut-off voltage of 4.5 V. This work highlighted the benefits of integrating elemental doping and surface coating, while offering a promising synthetic protocol for straightforward and effective dual-modification of various cathodes.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Xiaodan Zhang,Yongjun Zhang,Hongjing Han,Yanan Zhang,Haiying Wang,Jiayu Zhang,Xinyu Liu,Yanguang Chen
Great progress has been made in the catalytic cracking of shale oil by introducing metals into zeolites for regulating acidity to tailor the distribution of olefin products. However, the interaction between the loaded bimetals and their synergistic effect with the acid sites of the zeolite remains controversial. In this work, catalysts of highly stable Fe-La bimetals confined in ZSM-35 zeolite (Fe-La-ZSM-35) were constructed with appropriate acidic properties. Real shale oil and n -heptane as a representative reactant were chosen to explore the catalytic cracking performance of these materials. The Fe-La species formed metal sites bonded to the zeolitic framework in the confined microenvironment of ZSM-35, which established strong interactions. Comparing Fe-La-ZSM-35 with Fe/La-ZSM-35 synthesized by the impregnation method revealed that the direct doping method could better incorporate La and Fe species within the zeolite, resulting in stronger interactions between the bimetals and framework aluminum to form a large number of medium-strong Lewis acid sites (Fe-OH). The ratio of Brønsted acid sites to Lewis acid sites decreased from 1.56 in Fe/La-ZSM-35 to 0.45 in Fe-La-ZSM-35. Furthermore, the electron cloud density at the active Fe-OH site increased due to electron transfer from La to Fe, which promoted the adsorption of carbocations, improved stabilisation of carbocations and bimolecular reactions were inhibited. And the C 3 -C 4 bonds of n -heptane molecules were more easily attacked due to the weak acidity of these acid sites, resulting in propylene being the main product as the reaction C 7 H 16 → C 4 H 10 + C 3 H 6 was dominant during the catalytic cracking of n -heptane. The propylene yield of Fe-La-ZSM-35 increased to 35.35% compared with La-ZSM-35 (22.62%) and Fe/La-ZSM-35 (26.16%) at 600°C. During three reaction-regeneration cycles, n -heptane conversion and propylene selectivity were as high as 89.33% and 30.85%. For real light shale oil, the catalyst achieved a propylene yield and selectivity of 19.24% and 31.0%, demonstrating excellent feedstock generalizability. In addition, Fe-La-ZSM-35 exhibited excellent stability, indicating considerable potential for use in the catalytic cracking of real oil.
研究领域:
化学工程
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催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Chaomin Jia,Jianbing Wang,Huijiao Wang,Sichao Zhu,Xiaohui Zhang,Yuxiang Wang
Water fluoride pollution has caused non-negligible harm to the environment and humans, and thus it is crucial to find a suitable treatment technology. In this study, La-Fe@PTA adsorbent was synthesized for the defluoridation of mine water. The results showed that the optimum conditions for defluoridation by La-Fe@PTA were pH close to 7.0, the initial F − concentration of 10 mg/L, the dosage of 0.5 g/L and the adsorption time of 240 min. Compared with SO 4 2‒ , Cl ‒ , NO 3 ‒ , Ca 2+ and Mg 2+ , CO 3 2‒ and HCO 3 ‒ presented severer inhibition on fluoride uptake by La-Fe@PTA. The adsorption process fits well with the pseudo-second-order kinetic model and Freundlich model, and the maximum adsorption capacity of Langmuir model was 95 mg/g. Fixed-bed adsorption results indicated that fluoride in practical fluorinated mine water could be effectively removed from 3.6 mg/L to less than 1.5 mg/L within 130 bed volume (BV) by using 1.5 g La-Fe@PTA. Furthermore, the adsorbent still had good adsorption capacity after regeneration, which confirms the great application potential of La-Fe@PTA as a fluoride ion adsorbent. The mechanism analysis showed that La-Fe@PTA adsorption of fluorine ions is a physicochemical reaction driven by electrostatic attraction and ion exchange.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 40
·18818-18824
·
IF 3.3
Yaoxia Yang,Xingwei Guo,Mi Kang,Dangxia Wang,Zhiwang Yang
Developing efficient and inexpensive catalysts for the hydrogen evolution reaction (HER) is critical for the commercial viability of electrochemical sustainable energy technologies. In this study, a La-CoP/Co(OH)2 nanoarray supported on nickel foam (NF) was successfully prepared using the secondary hydrothermal and low-temperature phosphating method. The as-prepared La-CoP/Co(OH)2/NF material exhibited excellent hydrogen evolution performance in 1 M KOH solution. The overpotential of La-CoP/Co(OH)2/NF was 114 mV at the current density of 10 mA cm−2, and the Tafel slope was estimated to be 99 mV dec−1. The decoration of Co(OH)2 nanosheets on La-CoP nanorods with the textured surface not only provides a large surface area and more active sites but also promotes the transfer of electrons between Co(OH)2 and La-CoP, which accelerates the reaction rate and further improve the HER performance of the composite material. Additionally, the fabricated catalyst exhibits good stability and durability in alkaline media. This approach provides a feasible and effective strategy for exploring electrocatalysts with high efficiency and low prices for the electrolysis of water.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Wenqi Zhao,Xiaowei Bai,Xiangrui Lin,Yalkunjan Tur sun,Mei Zhong,Zhenghua Dai,Jian Li
Biomass-derived furfural and its derivatives are promising feedstocks for producing valuable C 5 diols by catalytic hydrolysis. However, this process requires selective ring opening of tetrahydrofurfuryl alcohol (THFA) to 1,5-pentanediol, which is challenging. Here we report efficient route for this conversion using Ni-La(OH) 3 catalysts prepared by a green co-precipitation-hydrothermal method. We show that these catalysts can achieve up to 91.7% yield and 94.6% selectivity of 1,5-pentanediol from THFA under mild conditions. We elucidate the key role of the La(OH) 3 phase, the basic sites and the Ni n+ -O-La 3+ structure of the catalysts in promoting the selective hydrogenolysis and ring opening of THFA. We also demonstrate that the co-dehydrogenation of secondary alcohols enables lower reaction pressure and longer catalyst lifetime. Our work provides a sustainable and environmentally benign approach for producing 1,5-pentanediol from biomass-based furfural and its derivatives, which has potential applications in polymer synthesis and green chemistry.
研究领域:
催化化学
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绿色化学
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可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yin Hu,Wei Chen,Fen Zhang,Lingling Wang,Xuanye Chen,Fei Han,Weiguo Song
Photocatalytic degradation of aqueous organic pollutant while hydrogen evolution has become an attractive and potential approach to address environmental pollution and energy shortages. The design of highly efficient photocatalyst and the mechanism study are the keys for this issue. For this purpose, a series of rare earth La doped perovskite NaTaO 3 were prepared by an easy solid-phase synthesis method. La doping changed the morphology, structure and physicochemical properties of NaTaO 3 crystal. More importantly, it also found that controllable La dopants formed a concentration gradient between the surface and bulk of NaTaO 3 crystal, which would cause a gradient of energy band structure. Noteworthy, 0.5La/NaTaO 3 was identified as the intermediate state with the La doping from A sites to B sites and from bulk to surface in NaTaO 3 crystal. It possessed a large La concentration gradient, leading to the better photoelectrochemical properties and photocatalytic performance than any other xLa/NaTaO 3 catalyst. For the photocatalytic reaction over 0.5La/NaTaO 3 , HCHO was partially mineralized and gradually converted to HCOOH due to the large energy barriers of the intermediate reaction steps, while H 2 was produced stably in the five recycle runs. The active species of • O 2 − , •OH and h + were detected by the control experiments with trapping agents, and • O 2 − was confirmed to be the dominant one in the photocatalytic reaction. On this basis, the possible mechanism was proposed to understand the photocatalytic system in depth.
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
危险品化学品经营许可证（带存储）