CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Biao Feng,Chengzhang Yao,Siyu Chen,Rui Luo,Shuhui Liu,Shanshan Tong
The design and synthesis of efficient adsorbing materials for recovery of precious metal are of paramount importance for fulfilling high-tech industry’s need. Herein, a one-step hydrothermal synthesis method was employed to construct the sulfur-rich MoS 2 nanoflakes under a mild condition. The first experiment evidence proved that MoS 2 nanoflakes were capable of capturing gold, with an extremely high uptake capacity (1133 mg g −1 ) and excellent selectivity. More importantly, MoS 2 nanoflakes showed preferential Au 3+ uptake behaviour compared with other precious metal ions such as Pd 2+ (47.6 mg g −1 ) and Pt 4+ (38.5 mg g −1 ). Different factors affecting the sorption process such as pH, adsorbent amount, contact time, ion strength , and reusability were systematically studied. The adsorption mechanism may be attributed to their intrinsically sulfur-rich characteristic for the strong soft–soft interactions between S atoms and Au atoms. These findings open up the possibility to expand the applications of sulfur-rich nanomaterials in the recovery of precious metal.
研究领域:
材料科学
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环境化学
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纳米技术
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资源回收
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配位化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Caicai Zhang,Ao Xu,Shuting Mao,Zhenping Li,Jiawen Yan,Fuyi Jiang,Yijing Wang,Kaiyuan Zhang,Yanli Zhou
Two-dimensional layered-structure MoS 2 has been explored as the promising cathode materials for magnesium ion batteries benefited by its wide layer distance and satisfactory capacity. However, such strong interaction between Mg 2+ and MoS 2 brings about the sluggish diffusion kinetics and irreversible electrochemical reaction, leading to a decreased specific capacity and poor rate capability. How to adopt its structure engineering and interface engineering to boost the Mg 2+ diffusion kinetics and enhance the electrochemical reversibility of MoS 2 is still a huge challenge. Herein, the amorphous sulfur-rich 1T/2H-MoS 2 mesoporous nanospheres (a-MoS 2+x , 0
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Guangping Xia,Yipeng Huang,Shi Yu,Bingmei Lai,Zhenyu Li,Guihua Ruan
The escalating use of herbicides containing chlorophenyl and acylamino (HCAs) in agriculture has intensified concerns regarding their environmental impact, underscoring the need for efficient and eco-friendly methods for their extraction and detection. This study introduces the synthesis of a novel N/S rich covalent organic framework (COF), DFT-TPB-COF, using 2,5-diformylthiophene and 1,3,5-tri(4-aminophenyl) benzene as building blocks. The as-synthesized COF is uniform, spherical and monodisperse, making it an ideal candidate as packed materials in solid-phase extraction column for HCAs extraction from complex environmental samples. The DFT-TPB-COFs show adsorption capabilities ranging from 2.52 to 30.34 mg g −1 for six HCAs, facilitated by π-π interactions, p-π interactions, hydrogen bonding, electrostatic interactions, and hydrophobic interactions. The adsorption–desorption process is rapid (10 min). Additionally, the presence of other types of herbicides showed little interference in the adsorption efficiency of DFT-TPB-COF for HCAs. A sensitive and reliable method combining the DFT-TPB-COFs-filled SPE column with HPLC-UV was developed for detection of six HCAs in various environmental water and soil samples. The method exhibited excellent linearity (1–200.0 ng mL −1 ) and low limits of detection (0.3–0.9 ng mL −1 ) for HCAs. This study not only demonstrates the potential of DFT-TPB-COFs as a suitable packed material in solid-phase extraction column, but also opens avenues for the practical application of COFs in the adsorption of organic pollutants.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 5
·3718-3725
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IF 1.395
Yan Xia,Guang Lu Han,Qiu Gen Zhang,Yi Gong,Ian Broadwell,Qing Lin Liu
CuO-filled aminomethylated polysulfone hybrid membranes were prepared for sulfur removal from gasoline. The as-prepared membranes were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The separation performance of the hybrid membranes was evaluated by pervaporation (PV) separation of n -heptane/thiophene binary mixture. CuO-filling leads to a decrease in permeation flux. The sulfur-enrichment factor increased first and then decreased with increasing CuO loading, and it is worth noting that there is a rebound in enrichment factor above 8 wt % CuO loading. Influencing factors such as nitrogen content, feed temperature, sulfur content, and various hydrocarbons on membrane PV performance were also evaluated. Permeation flux of 23.9 kg·μm·m − 2 ·h − 1 and sulfur-enrichment factor of 3.9 can be achieved at 4 wt % CuO loading in PV of n -heptane/thiophene binary mixture with 1500 μg·g − 1 sulfur content. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3718–3725, 2013
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
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2020
·
IF 5.578
Shun Li,Yongsheng Guo,Wenjun Fang,Guijin He
A sulfur-rich segmental hyperbranched polymer , SHPGMA, is developed to inhibit the catalytic coking during the thermal cracking of hydrocarbon fuels. In this work, the SHPGMA with a narrow molecular weight range is prepared via the principle of reversible addition-fragmentation chain transfer polymerization. The decomposition of n- dodecyl in SHPGMA takes place firstly at about 170 °C, and the dissociation of the skeleton of SHPGMA occurred in the range from 290 to 500 °C, which indicates a wide onset temperature range. The cracking reactions of n- tridecane with or without SHPGMA under different conditions show that SHPGMA can inhibit the catalytic cracking of n- tridecane, which results in significant reduction of the catalytic coke, conversion and heat sink. With the function of SHPGMA, the filamentous coke deposited in the pipeline is significantly reduced, and the generated coke become incompact and small. The amount of coke per cracked n- tridecane decreases from 38.42 to 27.03 μg/g with the addition of 0.03 wt% SHPGMA-3. These results confirm the potential application of SHPGMA as the coke inhibitor to endothermic hydrocarbon fuels.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2011
·
IF 5.874
Hu-Bo Ren,Bo-Yue Wu,Jia-Tong Chen,Xiu-Ping Yan
Detection of intracellular Zn2+ has gained great attention because of its biological significances. Here we show the fabrication of silica-coated S2–-enriched Mn-doped ZnS quantum dots (SiO2–S–Mn–ZnS QDs) by enriching S2– with a silica shell on the surface of Mn-doped ZnS QDs via a sol–gel process for imaging intracellular Zn2+ ions. The developed probe gave a good linearity for the calibration plot (the recovered PL intensity of the SiO2–S–Mn–ZnS QDs against the concentration of Zn2+ from 0.3 to 15.0 μM), excellent reproducibility (1.2% relative standard deviation for 11 replicate measurements of Zn2+ at 3 μM), and low detection limit (3s; 80 nM Zn2+). The SiO2–S–Mn–ZnS QDs showed negligible cytotoxicity, good sensitivity, and selectivity for Zn2+ in a photoluminescence turn-on mode, being a promising probe for photoluminescence imaging of intracellular Zn2+.
研究领域:
生物化学
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纳米医学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Hexiang Sun,Zachary Magnuson,Wenwen He,Weijie Zhang,Harsh Vardhan,Xiaolong Han,Gaohong He,Shengqian Ma
The desulfurization property of conventional mixed matrix membranes (MMMs) cannot meet the necessary demand due to particles aggregation and interface defects. Here, we put forward a layer-by-layer (LBL) approach to make a novel PEG@ZIF-8/poly(vinylidene difluoride)(PVDF) composite membrane for pervaporation desulfurization. In this way, a ZIF-8 layer is covered on the surface of the PVDF porous membrane via an in situ growth method. Then, a PEG layer is covered on the ZIF-8 layer by a casting method. Compared with pristine PEG membranes, the separation performance of the ZIF-8@PEG/PVDF nanocomposite membrane increased significantly. This can be attributed to the homogeneous ZIF-8 particle layer and better compatibility between the poly(ethylene glycol) (PEG) matrix and ZIF-8 particles. The membrane achieves a maximum total flux of 3.08 kg·m–2·h–1 at the third in situ growth cycles of ZIF-8 particles and a maximum sulfur enrichment factor of 7.6 at the sixth in situ growth cycles of ZIF-8 particles.
研究领域:
化学工程
·
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Ruiding Fei,Jianfeng Zhao,Huinan Wang,Huijuan Lin,Kui Xu,Guang Zeng,Wenchao Wang,Zhiping Yan
The hydrogen evolution capacity of MoS2 is impeded by its intrinsically highly electronegative sulfur sites, which firmly bind absorbed atomic H through S–Hads bonds and subsequently diminish H2 release. Designing effective surface-active sites to optimize atomic hydrogen activation and desorption for the hydrogen evolution reaction (HER) in water, while also expanding near-infrared (NIR) light responsiveness, remains a significant challenge. We have developed complexes of sulfur vacancy (Sv) enriched CdSv capped with W-modified MoS2+x (MoWS2+x) through an in situ substitution approach, followed by a photoreduction reaction. The bimetallic MoWS2+x cocatalyst not only increases the density of unsaturated coordinating S active sites but also attenuates the strength of the S–Hads bond. The optimized MoWS2+x/CdSv hybrid shows synergistic improvement of atomic H activation and desorption for the solar-driven HER, achieving the highest recorded H2-evolution rate of 9166.13 μmol g−1 h−1 under visible light (λ ≥ 420 nm), which marks a substantial improvement (greater than 750%), and an apparent quantum yield of 19.13%. Remarkably, the target photocatalyst, which is abundant in sulfur vacancies within its CdSv component, also achieves H2 production driven by NIR light beyond 780 nm, with a H2 evolution rate of 1326.82 μmol g−1 h−1. Comprehensive experimental and theoretical investigations corroborate that the existence of unsaturated coordinated S sites mitigates the strength of S–Hads bonds, resulting in the high driving force of H2 bubble release from water and long-lived active charge carriers. In this paper, we constructed visible light and NIR-active photocatalysts successfully for hydrogen production, highlighting the synergetic effects within this unique system. Additionally, the photo-behaviors of charge carriers have been investigated by ultra-fast spectroscopic techniques to gain a deeper understanding of the interfacial charge transfer kinetics. This study provides valuable insights into the development and optimization of photocatalysts that are responsive to both NIR and visible light, paving the way for more efficient solar-driven applications.
研究领域:
材料科学
·
催化
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光化学
·
可再生能源
✓ 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）