MICROPOROUS AND MESOPOROUS MATERIALS
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2020
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IF 4.551
Jian Wang,Congcong Wang,Hongchao Wang,Bo Jin,Peiping Zhang,Lina Li,Shiding Miao
The effective capture of radioactive volatile iodine ( 131 I and 129 I) from nuclear waste stream is of vital significance. In this work three kinds of porous organic frameworks (POFs) knitting with N -containing building units were constructed via cost-effective and maneuverable Scholl reaction. The obtained PAFs exhibited moderate porosity and satisfying thermal stability. With coexistence of open porous structure, the electron-rich amino group featured with π-π interactions was found to improve the affinity to iodine, and the iodine uptake capacities were 408 wt%, 335 wt% and 268 wt% when the prepared POFs of P-DPDA, P-TPB and P-PC were employed for the adsorption experiments. The results were superior to most of the porous adsorbents including zeolite , metal-organic frameworks (MOFs) and porous organic polymers (POPs). Iodine adsorption capacities of 289.50 mg g −1 (for P-DPDA), 194.63 mg g −1 (for P-TPB) and 259.69 mg g −1 (for P-PC) in organic solution were achieved, and the adsorbed iodine molecules could be released to ethanol. Such promising and cost-effective materials can be envisaged for application in the field of nuclear waste management.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2014
·Vol. 2
·期 29
·11091-11098
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IF 0
Lina Li,Hao Ren,Ye Yuan,Guangli Yu,Guangshan Zhu
Currently, synthesis of most porous organic frameworks (POFs) requires noble metals as the main catalyst. Herein we report a low-cost and straightforward synthetic strategy to develop porous aromatic frameworks (PAFs). With AlCl3 as the catalyst, the Scholl coupling reaction could occur between the phenyl rings of aromatic compounds. Using 3-dimensional monomers, such as triphenylamine, tetraphenylmethane, tetraphenylsilane, and tetraphenylgermane, we successfully obtained a series of PAFs with moderate Brunauer–Emmett–Teller (BET) surface areas ranging from 515 m2 g−1 to 1119 m2 g−1. Among the obtained PAF materials, PAF-41 exhibited the best CH4 and CO2 sorption capacity with CH4 (1.04 mmol g−1) and CO2 (3.52 mmol g−1) at 273 K. In addition, PAF-43 demonstrated its comparably high isosteric heat of adsorption at 34.8 kJ mol−1 for CO2 and 29.7 kJ mol−1 for CH4. It is also worth mentioning that the developed approach also overcomes typical flaws of some classic PAFs, such as high cost and complexity of precursor preparation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
MATERIALS & DESIGN
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2019
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IF 5.77
Jian Wang,Peiping Zhang,Congcong Wang,Xuda Zheng,Yuanjun Zhao,Lina Li,Shiding Miao
Porous aromatic framework (PAF) materials with π-π conjugation system based on Scholl reaction were found to exhibit satisfying photocatalytic performance, that can successfully degrade Rhodamine B (RhB) and colorless phenol. By selecting different multiple-phenyl building blocks, six kinds of PAF materials named as P-BP materials were successfully constructed by Scholl reaction, which exhibit not only photocatalytic ability, but also moderate specific surface areas, wide solar spectrum coverage, and good thermal and chemical stabilities. Depending on their different building block selections, the photocatalytic performance can be adjusted. The P-BP-DPA was found to exhibit the highest photocatalytic performance with 100% and 50% degradation rate for RhB and phenol in 300 min, respectively. Free radical trapping experiments showed that the photocatalytic activity originated from the strong oxidation capability of photogenerated holes. The band structure of such group of materials can be readily adjusted. With different monomers, their band gaps can be tuned from 1.87 to 2.36 eV, and their valence band positions were adjusted from 1.93 to 3.44 eV (vs NHE).
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zhiyi Li,Xianhao Liu,Timur Meng,Yuyue Peng,Hongliang Lei,Mingzhu Guo,Saowaluk Chaleawlert-umpon,Hongmin Su,Chaonan Yang,Lina Li
As the nuclear energy sector continues to expand, the concomitant issue of iodine adsorption is garnering increasing attention. However, the associated high costs have traditionally confined such materials to the realm of laboratory research, precluding their widespread application. In this study, we utilized cost-effective asphalt as the primary or partial feedstock and employed the Scholl reaction—a straightforward and economical synthetic method—to fabricate porous aromatic framework materials, PAF-P and PAF-45-P. The materials in question have demonstrated superior gas-phase iodine adsorption capacities, reaching 2287 mg/g and 1910 mg/g, respectively. Furthermore, they exhibit iodine adsorption rates of 83.27% and 72.15% in iodine-cyclohexane solutions. These remarkable figures position them as leading contenders for the large-scale application in pollutant adsorption. Comprehensive analytical techniques, including thermal gravimetric analysis and elemental composition assessment, coupled with rigorous adsorption performance evaluations, have revealed that the alkyl side chains structure present within the porous scaffolds substantially augments the adsorptive capacity for iodine and aromatic organic pollutants. These findings not only advance the field of material science but also hold significant promise for the development of cost-efficient, high-performance adsorbents capable of addressing pressing environmental challenges.
研究领域:
材料科学
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环境科学
✓ 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）