ACS Applied Materials & Interfaces
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2020
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IF 8.758
Ting Du,Jing Wang,Tianshu Zhang,Liang Zhang,Chengyuan Yang,Tianli Yue,Jing Sun,Tao Li,Mingu Zhou,Jianlong Wang
Nondegradable heavy metals have caused great dangers to the environment and human health. Combining stimuli-responsive materials with conventional MOF-based adsorbents has been considered an effective method to generate intelligent adsorbents for superior control over the adsorption process. Herein, a smart MOF-based ratiometric fluorescent adsorbent was designed to accurately monitor the progression of the removal of copper ions with dual-emitting fluorescence signal. Unlike the traditional difunctional materials, this delicately designed platform overcomes the huge energy gap to achieve two functions simultaneously. This unconventional platform provides a reliable fluorescent response toward Cu2+ during the removing process, changing linearly related to the degree of the adsorption process, which holds extreme promise in effectively monitoring the adsorption process. The underlying relationship of the adsorption and fluorescence response process toward copper was investigated by density functional theory (DFT) calculations. In particular, because of the favorable ion binding affinity of ZIF-8 and self-calibrating effect of RhB, the as-prepared smart adsorbent demonstrates a superior adsorption performance of 608 mg g–1, broad response range (0.05–200 ppm, 2.07 × 10–7to 8.29 × 10–4 M), ultrahigh sensitivity (0.04 ppm, 1.91 × 10–7 M) toward Cu2+ and strong anti-interference ability. This smart adsorbent opens an intelligent pathway to promote substantial advancements in the fields of environmental monitoring and industrial waste management.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
OPTICAL MATERIALS
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2021
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IF 3.08
Nan Qing Yang,Jin Li
To improve the photocatalytic degradation efficiency of ZnO and ZnIn 2 S 4 for organic pollutants, ZnO/ZnIn 2 S 4 0D/2D composite heterojunction materials were constructed using 0D ZnO nanoparticles and 2D layered ZnIn 2 S 4 . ZnO nanoparticles were fixed on the surface of 2D ZnIn 2 S 4 to form type-II heterojunctions, which provided abundant active sites and presented low ionization energy, good visible light adsorption, and low electron–hole recombination rates. The fabricated ZnO/ZnIn 2 S 4 composites presented an excellent performance in photocatalytic experiments. The photocatalytic first-order kinetic coefficient of the 10% ZnO/ZnIn 2 S 4 composite with a ZnO loading of 10 wt% was 4.9 times higher than that of ZnO nanoparticles. Therefore, constructing 0D/2D heterojunctions is an effective method for improving the degradation efficiency of ZnIn 2 S 4 toward organic pollutants.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2019
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IF 4.784
Ming Li,Bo Li,Li Zhou,Yuling Zhang,Qianyong Cao,Rujie Wang,Huining Xiao
A new fluorogenic bio-adsorbent was successfully synthesized for detection and adsorption of mercury ions in aqueous solution. It showed high sensitivity in removing Hg (II) at low concentration with a detection limit of 84 ppb which was below the maximum discharge standard in enterprise drain off water in China, besides, the adsorbent had good selectivity towards Hg (II) among numerous kinds of cations in water that it showed fluorescent quenching properties for Hg (II) ions due to photo-induced electron transfer . In addition, batch adsorption experiments were investigated to study the influence of initial concentration of metal ions, contact time, pH of the solution on the adsorption capacity. Equilibrium adsorption isotherms demonstrated the Hg (II) removing process fitted well with Langmuir isotherm model, and the maximum adsorption capacity for mercury was measured to be 143.88 mg/g. Furthermore, the adsorption kinetics was found to follow pseudo-second-order model. FTIR spectra and SEM-elemental mapping clearly confirmed the adsorbed heavy metal ions.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Limin Jing,Qijun Ding,Xia Li,Jiang Lou,Zhuqing Liu,Yifei Jiang,Wenjia Han,Zheng Cheng
In this work, fluorescent adsorbents that can efficiently detect and remove Pb 2+ were developed by integrating the designed amino-modified carbon quantum dots and carboxyl-modified collagen. The adsorption properties of the fluorescent adsorbent were further optimized and analyzed using a series of response surface experiments. The maximum adsorption concentration for Pb 2+ was 183 mg.g −1 . The adsorption isotherms fit well with the Langmuir model, and the adsorption kinetics fit with the pseudo-second-order model. The emission intensity of the fluorescent adsorbent gradually decreased with the increase of the concentration of Pb 2+ , and had a good linear correlation. In addition, the mechanism of detection and removal of Pb 2+ by fluorescent adsorbents was further demonstrated. The novel three-dimensional structured fluorescent aerogel can be used as a promising adsorbent with good adsorption concentration and sensing ability for Pb 2+ , which shows great prospects in wastewater.
研究领域:
环境科学
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材料科学
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分析化学
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DOI
PubMed
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 17
·8378-8389
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IF 5.8
Yao Yang,Bin Wang,Qian Liu,Zhenghua Wei,Ziye Mou,Quan Li,Chunfa Chen,Zaichun You,Bang Lin Li,Guansong Wang,Zhi Xu,Hang Qian
Bacterial infection is one of the most serious clinical complications, with life-threatening outcomes. Nature-inspired biomaterials offer appealing microscale and nanoscale architectures that are often hard to fabricate by traditional technologies. Inspired by the light-harvesting nature, we engineered sulfuric acid-treated sunflower sporopollenin exine-derived microcapsules (HSECs) to capture light and bacteria for antimicrobial photothermal therapy. Sulfuric acid-treated HSECs show a greatly enhanced photothermal performance and a strong bacteria-capturing ability against Gram-positive bacteria. This is attributed to the hierarchical micro/nanostructure and surface chemistry alteration of HSECs. To test the potential for clinical application, an in situ bacteria-capturing, near-infrared (NIR) light-triggered hydrogel made of HSECs and curdlan is applied in photothermal therapy for infected skin wounds. HSECs and curdlan suspension that spread on bacteria-infected skin wounds of mice first capture the local bacteria and then form hydrogels on the wound upon NIR light stimulation. The combination shows a superior antibacterial efficiency of 98.4% compared to NIR therapy alone and achieved a wound healing ratio of 89.4%. The current study suggests that the bacteria-capturing ability and photothermal properties make HSECs an excellent platform for the phototherapy of bacteria-infected diseases. Future work that can fully take advantage of the hierarchical micro/nanostructure of HSECs for multiple biomedical applications is highly promising and desirable.
研究领域:
生物医学工程
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材料科学
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微生物学
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光疗
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Hui He,Yuexin Wang,Juan Li,Shanliang Jiang,Subhan Sidra,Wenxue Gong,Ying Tang,Yang Hu,Rule Wei,Dongxiao Yang,Xuesheng Li,Zhongxing Zhao
High light adsorption and fast charge separation are crucial for photo-Fenton catalytic activity of MOFs. Herein, bottom-up design was proposed to fabricate polypyrrole (PPy C ) nanowires in MIL-88B(Fe) cages as photo-Fenton catalyst for Sulfamethoxazole (SMX) efficient degradation. Pyrrole was prior anchored into MIL-88B(Fe) cluster via Fe-N coordination, and then the additional monomer pyrrole was further triggered bottom-up polymerization in confined cages of MIL-88B(Fe) and formed PPy C @Py-MIL(Fe) composite. These PPy C nanowires were dispersed in Py-MIL(Fe) cages and tightly connected with MOFs clusters via Fe-N bonding. Characterization proved that: (1) Interfacial Fe-N can significantly promote the efficient electron transport from PPy C nanowires to Py-MIL(Fe), enhance optical absorption property, and construct strong Lewis acidic sites and ligand vacancies in PPy C @Py-MIL(Fe). (2) The confined PPy C nanowire via Fe-N connection remarkably promote photo-generated electron-hole separation, Fe 2+ |Fe 3+ redox ability of MOF, and improved photo-electric corrosion ability. As a result, it significantly enhanced the photo-Fenton catalytic performance for SMX degradation. Catalytic oxidation was attributed to the generation of ‧OH species that oxidized 93% SMX in 60 min, showing ultra-rapid degradation and TOC removal rates of 33.7 min −1 ·mg·g −1 and 8.68 min −1 ·mg·g −1 respectively, which was about 4–220 times higher than those reported state-of-the-art catalysts. Additionally, the PPy C @Py-MIL(Fe) catalyst showed minimal loss in catalytic activity even after recycling for 10 times, exhibiting good recycling stability compared to many MOFs. Systematic analysis shown that in-situ anchored growth of polypyrrole in confined porous cages of MOF can effectively enhance the catalytic activity and stability of MIL-88B(Fe), and has great development potential applications for photo-Fenton catalytic degradation of organic pollutants.
研究领域:
环境科学
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材料科学
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催化
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水处理
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DOI
高影响因子
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