ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Song He,Junqing Zhu,Hongliang Sheng,Jiayi Tang,Tao He,Jinfeng Ji,Yajun Huang
The existence of TC residues in the environment and the resultant development of opposition mechanisms constitute a serious menace to both ecological systems and human health. In the present study, UiO-67-bpy-X gels were prepared by the introduction of H 2 bpydc ligands and acetic acid modifiers, followed by a systematic evaluation of their TC adsorption capabilities. Characterization results revealed that UiO-67-bpy-2.4 gel displayed raised specific surface area (1953 m 2 g −1 ) and a graded porous structure. When conditions were optimized, the material manifested a maximum TC adsorptive capacity of 404.1 mg g −1 , outperforming the performance of most reported adsorbents. The kinetic modeling and adsorption isotherm analyses implied that chemical adsorption constituted the dominant uptake pathway. The adsorptive mechanism was further analyzed by XPS, FT-IR, and DFT calculations, which can be attributed to the synergistic effects of metal coordination, electronic interaction, hydrogen bonding, and π-π interaction. Furthermore, the material exhibited good structural stability, retaining 85.945 % of its original adsorptive capacity after six cycles. These findings suggested that UiO-67-bpy-2.4 gel held significant promise as environmental remediation materials, offering high adsorptive capacity and ease of recycling, thereby presenting a novel approach to addressing TC contamination.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Yanyan Gong,Ye Yuan,Cheng Chen,Somboon Chaemchuen,Francis Verpoort
Facile strategies for noble metal dispersion in the shell-layer of core–shell structured metal–organic frameworks based on Zr-MOFs (UiO-66@Pd-UiO-67-BPY) was developed. The robust structure of the core-structure UiO-66 was firstly synthesized before covering up with a shell-structure of UiO-67-BPY obtaining the core–shell structure (UiO-66@UiO-67-BPY). The metallation with active palladium species (Pd II ) was designed on the shell-layer of core–shell MOFs via a post-synthetic method. The Pd species were coordinated explicitly in a bidentate manner to the bipyridyl linkers of the shell-structure (UiO-67-BPY). Excellent dispersion of Pd in the shell structure was obtained, resulting in UiO-66@Pd-UiO-67-BPY, as confirmed from characterizations. Taking advantage of the designed catalyst, the synthesized UiO-66@Pd-UiO-67-BPY was examined for the catalytic hydrogenation reaction. The results revealed an excellent catalytic performance of UiO-66@Pd-UiO-67-BPY compared with the traditional catalyst Pd-UiO-67-BPY. Moreover, the designed catalyst structure exhibited outstanding performance and paved the way towards a cost-effective catalyst synthesis based on MOFs combined with a noble metal.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 20
·8614-8621
·
IF 4.177
Lei Xu,Yanping Luo,Lin Sun,Shan Pu,Min Fang,Rong-Xing Yuan,Hong-Bin Du
A new UiO-67-type zirconium metal organic framework (MOF) material UiO-67-bpy-Me (bpy = 2,2-bipyridine-4,4′-dicarboxylic acid, Me = methyl) was prepared by N-quaternization of the pyridine sites in UiO-67-bpy. After N-quaternization, the pristine neutral framework turned cationic while its high thermal and chemical stabilities were primarily preserved. Fast and enhanced anionic dye adsorption was observed in UiO-67-bpy-Me. In addition, despite the decrease in surface area and pore volume, UiO-67-bpy-Me exhibited an evident increase in CO2 uptake compared to UiO-67-bpy. The enhancement was ascribed to the strong interactions between CO2 and the N-quaternized framework. More importantly, as the N-quaternization has changed the electronic structure of the organic linker. UiO-67-bpy-Me showed optical absorption up to ca. 800 nm with a large red shift of 450 nm compared to the pristine UiO-67-bpy (ca. 350 nm). The extended optical absorption may lead to more efficiency in light utilization. A proof-of-concept demonstration showed that UiO-67-bpy-Me could more efficiently catalyze methyl-orange degradation under UV-Vis light irradiation than the pristine UiO-67-bpy. These findings demonstrate that N-quaternization could serve as a facile post-synthetic modification method to tune the chemical/physical properties of free pyridyl-containing MOFs.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2024
·
IF 3.9
Pei Xiu,Bai Jinchuan,Li Yaming,Kong Xiangbo
In this paper, a luminescent metal-organic framework Tb 3+ @tartaric acid-functionalized Zr-MOF (Tb 3+ @UiO-67-bpy-TA, TA = tartaric acid) was prepared by post-synthetic modification (PSM) and used as a fluorescence sensor for the detection of the pesticide nitenpyram (NTP). The fluorescence sensing experiment verified that Tb 3+ @UiO-67-bpy-TA had exceptional sensitivity and selectivity for NTP detection, and the detection limit was calculated to be as low as 1.28 µM. The mechanism studies indicated that competitive UV absorption, photoinduced electron transfer (PET) and dynamic quenching contributed to the fluorescence quenching process. In addition, the detection of NTP in tap water and Yellow River water samples by the Tb 3+ @UiO-67-bpy-TA were also investigated using standard addition method, and satisfactory recoveries were achieved.
研究领域:
材料科学
·
分析化学
·
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）