Journal of Materials Chemistry A
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2016
·Vol. 4
·期 33
·12799-12806
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IF 8.262
Xintong Zhang,Wei Wang,Wenxin Shi,Jiaojie He,Hui Feng,Yongpeng Xu,Fuyi Cui,Ce Wang
Microbial growth in water poses a growing threat to humans. Nutrient starvation is an effective and green manner to control microbial growth in water. The general coexisting phosphate and organic carbon in water can both serve as nutrients for microbial metabolism, and thus one can take a heavy toll on the performance of a nutrient-starvation antibacterial approach based on the other. Herein, carbon nanofibers with embedded LaCO3OH nanoparticles (LCNFs) were rationally synthesized by carbonizing electrospun polyacrylonitrile nanofibers containing La-species. The LCNFs served as a capture agent for both phosphate and organic matter to realize more effective nutrient-starvation antibacterial activity for water security. The LCNFs rendered high phosphate removal efficiency through the strong chemical bond between LaCO3OH and phosphate, even for trace phosphate concentrations. At the same time, organic nutrients could be synchronously cut down by LCNFs, which resulted in more stringent nutrient-deficient conditions to control microbial growth in water effectively.
研究领域:
环境科学
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材料科学
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生物学
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2022
·
IF 4.383
Xiang-Rong Ma,Xian-Yong Wei,Rui Dang,Wei Guo,Meng-Jiao Ren,Yu-Hong Kang,Xiao Li,Yong Gao,Yan-Jun Li,Jing-Jun Bai,Zhi-Pan Liu,Yu-Fei Wang,Jian Li,Zhi-Min Zong
LaCO 3 OH/Ni–Fe-LDH was synthesized as a new type of layered double hydroxides (LDHs) by complexing agent-assisted homogeneous precipitation techniques. According multiple characterizations, LaCO 3 OH/Ni–Fe-LDH has LDH phase with platelet-like particles and mesoporous properties with 141 m 2 g −1 of specific surface area. In addition, both lanthanum and iron are present in the composites, resulting in a significant decrease in the band gap to 2.04 eV, which is lower than that of either Ni–Fe-LDH (2.43 eV) or Ni–Al-LDH (4.86 eV). Compared with Ni–Fe-LDH and Ni–Al-LDH, LaCO 3 OH/Ni–Fe-LDH significantly improved photocatalytic performance and effectively decomposed methyl orange (MO) under visible light exposure. The increased photocatalytic efficiency from LaCO 3 OH/Ni–Fe-LDH is mainly ascribed to the lower band gap and higher adsorption performance. In addition, LaCO 3 OH/Ni–Fe-LDH has an interface region produced by the recombination of semiconductors with LaCO 3 OH and Ni–Fe-LDH structures, which can effectively improve the separation of photocarriers and expand the energy range of photoexcitation . Moreover, a plausible mechanism for photocatalytic decomposition of MO was presented.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 22
·15302-15310
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IF 3.9
Deng Gu,Yuanjin Wang,Zhiman Liang,Yanting Dou,Zhenhe Xu,Jiqi Zheng,Yaguang Sun,Fu Ding,Yu Gao
The construction of a heterojunction and the introduction of a cocatalyst can both promote the transfer of photogenerated electrons, which are effective strategies to enhance photocatalytic efficiency. In this paper, a ternary RGO/g-C3N4/LaCO3OH composite was synthesized by constructing a g-C3N4/LaCO3OH heterojunction and introducing a non-noble metal cocatalyst RGO through hydrothermal reactions. TEM, XRD, XPS, UV-vis diffuse reflectance spectroscopy, photo-electrochemistry and PL tests were carried out to characterize the structures, morphologies and carrier separation efficiencies of products. Benefiting from the boosted visible light absorption capability, reduced charge transfer resistance and facilitated photogenerated carrier separation, the visible light photocatalytic activity of the ternary RGO/g-C3N4/LaCO3OH composite was effectively improved, resulting in a much increased MO (methyl orange) degradation rate of 0.0326 min−1 compared with LaCO3OH (0.0003 min−1) and g-C3N4 (0.0083 min−1). Moreover, by combining the results of the active species trapping experiment with the bandgap structure of each component, the mechanism of the MO photodegradation process was proposed.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
PubMed
高影响因子
Materials Today Sustainability
·
2022
·
IF 7.244
B.-B. Chen,S. Chang,M.-L. Liu,J. Lv,Y. Wang,R.-C. Qian,D.-W. Li
Luminescent lanthanum hydroxycarbonates (LaCO 3 OH) have received considerable attention because of their excellent photocatalytic activities . The luminescent properties of the LaCO 3 OH are closely related to their morphology and crystallization, but phosphorescent LaCO 3 OH has not yet been observed. Herein, the LaCO 3 OH core-satellite superstructures (LaCO 3 OH-CSSs), which consist of a porous structure as a core and urchin-like structures as the satellites, are prepared using a simple hydrothermal method . The proposed LaCO 3 OH-CSSs have strong solid-state luminescence and highly effective solution room-temperature phosphorescence with a lifetime of 163.5 ms. Combination with the advantages of both porous structure and slow charge recombination, the LaCO 3 OH-CSSs show superior photocatalytic activities, which can be used for highly efficient photodegradation of model rhodamine 6G (R6G) dyes. The R6G dyes can be completely degraded within 5 min under low-power white light (21 W) irradiation. The highly efficient photocatalytic activity suggests that phosphorescent LaCO 3 OH-CSSs can be well used for the treatment of water pollution.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2023
·Vol. 30
·期 19
·55009-55023
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IF 5.8
Cheng Fulong,Nie Fangui,Fan Yuting,Huang Dan,Wang Yinian,Fan Jianxin
Phosphorus removal from wastewater has been considered as an effective method to control eutrophication and mitigate phosphorus deficiency. Phosphate adsorption using lanthanum-based materials has awakened much attention and triggered extensive research. In this study, novel flower-like LaCO 3 OH materials were synthesized via a one-step hydrothermal method and evaluated for phosphate removal from wastewater. The adsorbent with flower-like structures prepared at the hydrothermal reaction time of 4.5 h (BLC-4.5) exhibited the optimum adsorption performance. BLC-4.5 had a rapid removal rate with more than 80% of the saturated adsorbed phosphate removed within 20 min. Furthermore, the maximum phosphate adsorption capacity of BLC-4.5 was as high as 228.5 mg/g. Notably, the La leaching amount of BLC-4.5 was negligible in the pH range of 3.0–11.0. BLC-4.5 outperformed most of the reported La-based adsorbents in terms of removal rate, adsorption capacity, and La leaching amount. Moreover, BLC-4.5 had broad pH adaptability (3.0–11.0) and high selectivity for phosphate. BLC-4.5 also displayed excellent phosphate removal efficiency in actual wastewater and great recyclability. The potential adsorption mechanisms of phosphate on BLC-4.5 were precipitation, electrostatic attraction, and inner-sphere complexation via ligand exchange. This study demonstrates that the newly developed flower-like BLC-4.5 reported here is a promising adsorbent for the effective treatment of phosphate in wastewater.
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
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 5
·2619-2625
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IF 3.925
Xuefeng Wang,Haeseong Jang,Zijian Li,Haisen Li,Guangkai Li,Min Gyu Kim,Xuqiang Ji,Qing Qin,Xien Liu
Promoting the activity of Ir-based nanomaterials for oxygen evolution reaction (OER) in acid media without losing their durability is crucial for reducing overpotentials in energy conversion, such as electrochemical water splitting. Here, a nanocomposite composed of a-IrOx and lanthanum salt (LaCO3OH) was constructed to further improve its OER activity by tuning the electronic structure of a-IrOx, because a-IrOx is a well-known critical material as the active layer of Ir-based anodic catalysts. The interaction between Ir and La via O atoms as a bridge in the catalyst IrOx/LaCO3OH, verified by X-ray absorption near edge structure spectroscopy, tunes the electronic structure of a-IrOx and thus obviously enhances its activity for the OER in acid media, compared with commercially available IrO2 as well as most of the reported Ir-based OER electrocatalysts. The overpotential of IrOx/LaCO3OH at a current density of 10 mA cm−2 is 255 mV with a Tafel slope of 55 mV dec−1. This work reveals that the strong electronic interaction between Ir- and La-based materials can efficiently improve activity and reduce energy consumption, as well as enlarging the family of acidic OER electrocatalysts.
研究领域:
材料科学
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电化学
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催化
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能源转换
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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）