DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 30
·10472-10480
·
IF 4
Pingping Teng,Ying Liu,Zhongqiao Sun,Hao Meng,Yide Han,Xia Zhang
Development of binary MOF-on-MOF heterostructures is a research hotspot in MOFs chemistry due to the advantages elicited by a closely connected interface, which may endow more abundant functionality and even broader applications in interface chemistry. A MOF-on-MOF heterostructure was constructed by in situ growth of MIL-88B on the outer surface of UiO-66. The resultant MIL-88B@UiO-66 produced had an interesting flower-like morphology composed of MIL-88B (petal) on tetrahedral UiO-66 (core). The MIL-88B@UiO-66 heterostructure showed adsorption and Fenton-like oxidation abilities, with distinctly improved structural stability in aqueous solution compared with that of single MIL-88B. Methylene blue (MB) was selected as the target molecule to evaluate the adsorption and Fenton-like oxidation activities. The efficiency of total removal of MB was studied systematically under various operating conditions and the influencing factors were optimized. The kinetics of adsorption and catalytic oxidation were simulated to explore the interactions between MB and MIL-88B@UiO-66. The mechanisms of enhanced adsorption and Fenton-like oxidation were suggested. The cyclic removal performance and structural stability of MIL-88B@UiO-66 were also determined.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2014
·
IF 4.258
Ye-Yu Wu,Cheng-Xiong Yang,Xiu-Ping Yan
Metal–organic frameworks (MOFs) have received considerable attention as novel sorbents for sample preparation due to their fascinating structures and functionalities such as large surface area, good thermal stability, and uniform structured nanoscale cavities. Here, we report the application of a thermal and solvent stable MOF MIL-88B with nanosized bipyramidal cages and large surface area for solid-phase microextraction (SPME) of polychlorinated biphenyls (PCBs). Novel MIL-88B coated fiber was fabricated via an in situ hydrothermal growth of MIL-88B film on etched stainless steel fiber. The MIL-88B coated fiber gave large enhancement factors (757–2243), low detection limits (0.45–1.32 ng L −1 ), and good linearity (5–200 ng L −1 ) for PCBs. The relative standard deviation (RSD) for six replicate extractions of PCBs at 100 ng L −1 on MIL-88B coated fiber ranged from 4.2% to 8.7%. The recoveries for spiked PCBs (10 ng L −1 ) in water and soil samples were in the range of 79.7–103.2%. Besides, the MIL-88B coated fiber was stable enough for 150 extraction cycles without significant loss of extraction efficiency. The developed method was successfully applied to the determination of PCBs in water samples and soil samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
NANO
·
2021
·
IF 1.556
Jungang Yi,Kun Wu,Huadong Wu,Jia Guo,Linfeng Zhang,Hao Li,Jianding Li
The presence of the antibiotics in the wastewater has posed a huge risk to aquatic life and human health. It is a great significance to develop an effective technology to treat the antibiotics-containing wastewater. In this study, a series of g-C 3 N 4 /NH 2 -MIL-88B(Fe) composite photocatalysts are synthesized through a simple one-step method. The structure and optical properties of prepared photocatalysts are detected by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis absorption spectra (UV–Vis DRS), photoluminescence (PL) spectroscopy and transient photocurrent techniques, respectively. FESEM and TEM show that MOF is uniformly dispersed in petaloid g-C 3 N 4 . The uniform dispersion of Fe-MOFs in the heterojunction composites increases the specific surface area ( S BET ) of g-C 3 N 4 , which results in a great adsorption property for the nanocomposite. The capture experiment shows that • O 2 − and h + are the main active substances in ciprofloxacin (CIP) degradation. These prepared composite photocatalysts exhibit excellent CIP photodegradation activity under visibly light irradiation with an apparent rate constant of 0.0127 min − 1 (3.74 times as the rate of single component). The remarkable catalytic performance can be ascribed to the fact that the g-C 3 N 4 /NH 2 -MIL-88B(Fe) heterojunction inhibits the recombination of photoinduced electron–hole pairs and improved the visible light absorption.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Yixuan Gao,Siming Yan,Yi He,Yi Fan,Liyun Zhang,Jing Ma,Ruitong Hou,Li Chen,Jingyu Chen
Herein, a novel membrane with polyacrylic acid (PAA), NH 2 -MIL-88B(Fe) (NM88B), and graphene oxide (GO) was fabricated via a simple vacuum filter method equipped with the nylon membrane substrate. The composite membrane (PAA@NM88B/GO membrane) retained the laminated structure of GO, and PAA@NM88B was used as the photo-Fenton catalytic nano-filler to intercalate GO. Through a series of material characterization and membrane separation performance tests, the results showed that by introducing porous NM88B and PAA cross-linking modification, PAA@NM88B/GO membrane had excellent hydrophilicity, water flux and dye rejection performance. The flux of the PAA@NM88B/GO membrane was 68.21 L m −2 h −1 bar −1 , which is about 15 times higher than that of GO membrane. In addition, the composite membrane had a high rejection (over 97%) for methylene blue (MB), crystal violet (CV) and Congo red (CR). More importantly, PAA@NM88B/GO membrane can also be used to degrade textile wastewater in real life. The membrane can be used as a catalyst to degrade contaminants, and had a high removal of MB in 40 min (98.79%) under the synergistic effect of membrane adsorption and photocatalysis . Therefore, the results indicated that this new type of PAA@NM88B/GO membrane had potential applications in water purification and actual textile wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Kai Zhao,Zisheng Zhang,Yalan Feng,Shuanglong Lin,Hong Li,Xin Gao
The development of efficient strategies to promote spatial charge separation is a promising way for the improvement of photocatalytic performance. Herein, a novel surface oxygen vacancy (OVs) modified Bi 2 MoO 6 /MIL-88B(Fe) heterostructure (BMO/M88) was exemplified by a facile two steps solvothermal method to demonstrate synergistic promotion of bulk & interface charge separation. Due to the existence of OVs and the construction of heterostructure, the Bi 2 MoO 6 /MIL-88B(Fe) composites exhibited significant enhancement of visible-light responsive range and possessed more efficient bulk & interface charge separation. This novel Bi 2 MoO 6 /MIL-88B(Fe) composites exhibited high visible light photocatalytic performance toward dye pollutant rhodamine B (RhB) and model colorless pollutant bisphenol A (BPA) photodegradation , and the possible Type II heterojunction mechanism of photocatalysis process was investigated. This work not only provides a novel pathway for design of MOFs-based heterojunction with surface OVs defect modification but also offers a strategy for significantly enhanced bulk & interface charge carriers separation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Atian Xie,Jiuyun Cui,Jin Yang,Yangyang Chen,Jihui Lang,Chunxiang Li,Yongsheng Yan,Jiangdong Dai
Membrane fouling is one of the major blockages toward the further sustained development of membrane technology . In this work, PVDF/NH 2 -MIL-88B(Fe) (PVDF/NM88B) membranes were prepared for the first time via one-step simple non-solvent induced phase conversion method. The PVDF/NM88B membrane shows an excellent separation performance (above 99.4%) and permeation flux (340–1970 L m −2 h −1 bar −1 ) towards different oil/water emulsions. Moreover, PVDF/NM88B membrane exhibits excellent antifouling performance with flux recovery ratio of almost 100% attributing to hydrophilicity and high photo-Fenton activity of NM88B. In addition, the membrane with good mechanical properties and recyclability shows great application potential in wastewater treatment . This work may shine a new light on the promising photo-Fenton self-cleaning prospect of Fe-based MOFs in constructing antifouling membranes for wastewater remediation and potential applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 237
·期 5
·325
·
IF 3
Song Jiacheng,Zhang Ziyang,Dong Shengye,Chen Anxiang,Yu Shouwu,Xiao Shujuan
The high activity and easy recyclability of catalysts are significant challenges in the photocatalytic treatment of wastewater. Combining photocatalytic technology with membrane separation technology to prepare self-cleaning catalytic composite membranes for treating wastewater containing organic pollutants can not only solve the problem of traditional catalyst recovery difficulties but also overcome membrane fouling. In this paper, NH 2 -MIL-88B was modified by introducing citric acid as a ligand construction defect, and NH 2 -MIL-88B-CA (NMB-CA) with better photocatalytic performance was obtained. Then, a thin film nanocomposite (TFN) film with better self-cleaning performance was prepared by covalently bonding the NMB-CA nanocatellite to the active polyamide layer through interfacial polymerization and amidination in Polysulfone (PSF) based membrane. The best-performing TFN-2 membrane has even better fouling resistance, removing 98.1% of tetracycline after 8 cycles, and the water flux of the membrane can still recover to 99% of the initial water flux, demonstrating excellent recyclability. TFN membrane prepared in this paper has unique self-cleaning and anti-pollution characteristics, which provides a new solution for efficient treatment of organic-contaminated water.
研究领域:
环境科学
·
材料科学
·
化学工程
·
膜分离技术
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Ranran Yuan,Cailiang Yue,Jinli Qiu,Fuqiang Liu,Aimin Li
TiO 2 @NH 2 -MIL-88B(Fe) heterostructures (TMFe-x) were successfully synthesized and used in an efficient sunlight-driven reduction towards Cr(VI) in a neutral aqueous media. Further, the prepared TMFe-x heterostructures exhibited higher photocatalytic activity when compared with those exhibited by pure TiO 2 and NH 2 -MIL-88B(Fe) under simulated sunlight irradiation. The optical TiO 2 modification content was determined to be 10 wt.% (TMFe-b), with 98.6% Cr(VI) being converted to Cr(III) within 35 min using ammonium oxalate as the hole scavenger at pH = 7. In neutral conditions, the kinetic rate constant (0.0878 min −1 ) was five times larger than the published values. Additionally, the photocatalytic performance of TMFe-b was maintained and Fe leaching was observed to be negligible after the completion of four reaction cycles. The superior photocatalytic property can be attributed to the high photoelectron-hole separation and migration efficiency. Subsequently, TMFe-b achieved Cr(VI) reduction under neutral conditions by capturing hydrogen from the water molecules or the hole scavengers. The photoelectrons and superoxide radicals were the main active species. Furthermore, TMFe-b was able to efficiently eliminate various pollutants through photocatalytic oxidation and reduction. This study suggests a novel strategy for the preparation of environmentally stable and efficient MOF-based photocatalysts to efficiently eliminate various pollutants. Further, there is a huge potential for the practical application of this technology to water purification .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Dedong Jia,Zelong Shen,Yaohui Lv,Zhipeng Chen,Hongqiang Li,Yan Yu,Jieshan Qiu,Xiaojun He
The design and fabrication of advanced cathode materials with excellent electrochemical properties to match the Zn anode is crucial for the development of aqueous zinc-ion batteries (ZIBs). Herein the synthesis of MIL-88B(V)@rGO composites is reported, in which MIL-88B(V) nanorods are anchored on reduced graphene oxide (rGO) sheets, as cathode for ZIBs, where the graphene oxide induces the formation of small-size nanorods instead of typical prism morphology. During the initial charge/discharge process, the cathode undergoes an in situ irreversible transformation from MIL-88B(V) to amorphous V 2 O 5 that acts as active site for the subsequent Zn 2+ insertion/extraction. The hierarchical structure of the composites and the amorphous V 2 O 5 provide abundant channels and active sites for Zn 2+ diffusion and adsorption. The density functional theory calculation reveals that the rGO sheets have two functions, i.e., to improve the conductivity and to reduce the Zn 2+ migration energy barrier. Consequently, the MIL-88B(V)@rGO cathode exhibits an ultrahigh reversible capacity of 479.6 mAh g −1 at 50 mA g −1 and good rate performance of 263.6 mAh g −1 at 5000 mA g −1 , which are superior to metal–organic frameworks (MOFs) cathodes reported in literature. This work may shed a new light to the design and fabrication of MOFs-based cathodes for aqueous ZIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Xin Zhou,Qianwei Liang,Boqian Yang,Yuyu Chen,Yuanyuan Fang,Hanjin Luo,Yushan Liu
Compounding a single component with a specific function into a composite material that can fully exert synergy effects according to demand is the key to achieving the expected function and expanding emerging applications. Herein, anchoring δ -MnO 2 with strong oxidizing ability on the surface of Fe/Mg-MIL-88B with superior uptake ability for As(V) to form an amorphous nanocomposite with multiple functions for removing more toxic As(III). Due to special construction and rational design, the fabricated nanocomposite demonstrated an excellent As(III) removal performance over a very broad pH range of 3 to 10. Impressively, the adsorption efficiency of the obtained δ -MnO 2 @Fe/Mg-MIL-88B on As(III) is greatly improved, and the maximum adsorption capacity under laboratory conditions is as high as 221.04 mg/g in room temperature. Notably, the residual concentration of arsenic will drop below 10 μg/L, as long as the initial As(III) concentration is not higher than10 mg/L, which is very critical for further promotion. In general, the δ -MnO 2 @Fe/Mg-MIL-88B exhibits excellent promise in removing As(III) from sewage, and its applicability in practical complex water treatment deserves further study.
研究领域:
环境科学
·
材料科学
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2021
·
IF 8.271
Jianfang Liu,Zhenzhen Ran,Qiyan Cao,Shengfu Ji
The selective oxidation of methanol to methyl formate is one of the most attractive processes to obtain value-added methanol-downstream products. The development of highly efficient and stable catalysts is critical for this transformation. In this study, a series of MIL-88B(Fe x ,Co 1– x ) bimetallic catalysts with different Fe/Co molar ratios were prepared through a one-pot hydrothermal method. X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, N 2 adsorption-desorption, and inductively coupled plasma-mass spectrometry characterization were performed to elucidate the structure of the catalysts. The activity of the catalysts were assessed in the one-step oxidation of methanol to methyl formate with H 2 O 2 in a liquid-phase batch reactor. The results show that the MIL-88B(Fe x ,Co 1– x ) catalysts exhibit uniform needle-like morphologies with an average length and width of 400–600 nm and 100–150 nm, respectively. Co 2+ is incorporated into the framework by partially replacing Fe 3+ in MIL-88B. Moreover, the catalyst efficiently promoted the conversion of methanol to methyl formate. When MIL-88B(Fe 0.7 ,Co 0.3 ) catalyst was used with a molar ratio of H 2 O 2 to methanol of 0.5 at 80 °C for 60 min, 34.8% methanol conversion was achieved, and the selectivity toward methyl formate was 67.6%. The catalysts also showed great stability with a steady conversion and selectivity even after four cycles. The preliminary oxidation mechanism was also studied. It was determined that H 2 O 2 is first adsorbed on the Fe 3+ sites and subsequently activates these sites. Methanol is adsorbed by the O atoms of the framework through hydrogen bonding and is gradually oxidized to formic acid . Subsequently, formic acid reacts with the residual methanol at the Fe 3+ and Co 2+ Lewis acid sites to form methyl formate.
研究领域:
化学工程
·
催化化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Munir Ahmad,Xie Quan,Shuo Chen,Hongtao Yu
Iron containing MOFs have been currently estimated as greater candidates for heterogeneous Fenton catalysts due to their open pores and well dispersed metallic components. However, metals in majority of MOFs are bounded by organic linkers, which reduces Lewis acid sites and make them not available for H 2 O 2 activation. Creating coordinatively unsaturated metal centers (CUCs), acting as Lewis acid sites, is a feasible approach for efficient photo-Fenton activity. Here, we successfully synthesized a photo-Fenton CUCs-MIL-88B-Fe catalyst with mixed-valence (Fe II /Fe III ) on ultrathin Ti 3 C 2 nanosheets. The Lewis acidity was probed by TPD-NH 3 and IR-pyridine analysis and tested for pollutants degradation. The results showed that CUCs-MIL-88B-Fe/Ti 3 C 2 displayed highest photo-Fenton activity under visible light irradiation at pH 3.0 and 10 mM H 2 O 2 . This could be attributed with the CUCs, fast H 2 O 2 activation, high Lewis acidity and carrier separation with Ti 3 C 2 nanosheets due to its high charge mobility. Furthermore, CUCs-MIL-88B-Fe/Ti 3 C 2 exhibited a good stability and reusability.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 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）