Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 5
·2192-2200
·
IF 5.503
Zhewen Ma,Qiuyu Zhang,Wen Zhu,Darvaish Khan,Chuanzhu Hu,Tianping Huang,Wenjiang Ding,Jianxin Zou
TMA-TM (TM = Fe, Ni) MOFs were synthesized successfully by a facile method. A MgH2-TM MOF (TM = Fe, Ni) composite was obtained via ball milling and the corresponding hydrogen storage performance was investigated. Particularly, high-resolution transmission electron microscopy was performed to in situ characterize the dehydrogenation behavior of the MgH2-TM MOF composite. The results reveal that nano α-Fe and Mg2NiH4/Mg2Ni derived from the TMA-TM MOFs display a synergetic improving effect on the de/hydrogenation of MgH2. During the hydrogen desorption process, Mg2NiH4/Mg2Ni works as a “hydrogen pump” to quickly deliver hydrogen and facilitates hydrogen diffusion. Meanwhile, α-Fe accelerates the nucleation and growth of Mg by reducing the nucleation energy of Mg from MgH2. The hydriding activation energy of the MgH2-TM MOF declines to 45.3 kJ mol−1 H2. Meanwhile, the peak dehydriding temperature of the MgH2-TM MOF is 530.9 K, which is much lower compared with the MgH2–Fe MOF composite (541.7 K) and as-milled MgH2 (685.2 K). Therefore, nano Mg2Ni and α-Fe derived from the TMA-TM MOFs can remarkably improve the hydrogen storage properties of the MgH2/Mg system due to their synergetic catalytic effects.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wenbin Gao,Yan Tan,Binhai Wu,Yuzhen Chen,Zhan Hu,Yifan Wang,Yujiao Wen,Zhi Zhou,Nan Zhou
Quinclorac (QNC) and Cr(VI), are common contaminants in surface waters, posing serious hazard to human and ecological health. Nano FeS, an effective catalyst that has excellent redox properties, is susceptible to over-oxidation and agglomeration problems, which impede its practical application. Herein, nano-Fe 1−x S was modified by stable iron oxide (Fe 3 O 4 ) and biochar (BC AA /Fe 1−x S/Fe 3 O 4 ), which presented the core (Fe 1−x S) shell (Fe 3 O 4 )-like structure uniformly dispersed on BC AA surface. The composite overcame the disadvantages of nano-Fe 1−x S and achieved high removal efficiency of 100% and 99.98% for QNC and Cr(VI), respectively. Based on XPS analysis, Fe(II) content was reduced from 53.3% to 34.2% and S(II) content from 13.0% to 6.5%. Fe(II) species in the composite were the main active substance for QNC degradation and Cr(VI) reduction, and S(II) species also indirectly provided electrons to promote Fe 2+ /Fe 3+ cycling. Then, we identified the intermediates of QNC and active radicals • OH or SO 4 •− in the system to suggest possible degradation pathways. We further discovered no mutual interference between QNC and Cr(VI) and proposed the possible mechanism for simultaneous removal that QNC degradation by radical attack and Cr(VI) reduction by electrons.
研究领域:
环境科学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2019
·
IF 3.073
Juan Ma,Baiqin Zhou,Hong Zhang,Wenbo Zhang,Zhilong Wang
Tetracycline with high solubility and biodegradation-resistance has been widely detected from both surface and ground water, and has been proved negative impact on water environment and human health. Adsorption is considered as an environment-friendly and efficient approach to deal with TC contamination in wastewater treatment . In this work, KOH activating municipal wasted sludge biochar with different amounts of nanoscale Fe/Cu was prepared and used to remove TC from water with high performance. The removal efficiency of the composite was found to be significantly improved after loading Fe/Cu particles and the highest removal amount could reach to 386.93 mg/g under the optimum molar ratio of Fe:Cu = 5:3. The analytical results of isotherms, kinetics and thermodynamics suggested that the excellent removal performance of TC by the composite was involved many mechanisms, such as physical adsorption, hydrogen bonding, π–π interaction, complexation and electron transfer. The removal mechanisms of TC and the characteristics of composite were also confirmed by FTIR, XRD , XPS and BET determination. The excellently improved adsorption capacity , environmental-friendly and readily-made properties entrusted the novel sludge-based composite with great potential for TC removal from wastewater.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Hai Qin,Xiaoting Liao,Qun Tang,Bin Huang,Zhiming Zou,Lin Xu,Heping Li
Developing biopolymer-based smart active packaging materials with antimicrobial and colorimetric ammonia-sensitive function has become an emerging strategy to ensure food safety. To address the shortcomings of biopolymer film material with single function, weak mechanical and barrier performances, innovative corn starch (CS)-based smart active packaging film with antimicrobial and colorimetric ammonia-sensitive function was manufactured by constructing novel nano Fe-HIA complex as functional filler. Results revealed that the manufactured CS/Fe-HIA films had uniform and intact morphologies resulting from robust hydrogen bonds between CS and Fe-HIA, and displayed significantly improved performances dependent on Fe-HIA content. Specially, the CS-based smart active film with relatively high Fe-HIA content (5 wt%) was much more sensitive to ammonia, showing noticeable color transition from brown to yellow. The well distributed Fe-HIA significantly promoted hydrophobicity (96.0°), water barrier, thermal stability, mechanical strength (6.8 MPa), and UV-blocking (100 %) performances of the film. Furthermore, CS/Fe-HIA films possessed good antibacterial activity (over 90 %), long-term color stability, biocompatibility, and biodegradability. In freshness monitoring trial, CS/Fe-HIA films were proved to be effective in real-time and visual monitoring of prawn spoilage. This study presents a new strategy for creating advanced biopolymer-based antimicrobial and colorimetric ammonia-sensitive film, boosting related application in smart active food packaging.
研究领域:
食品科学
·
材料科学
·
生物高分子
·
食品安全
✓ 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）