Energy Technology
·
2020
·Vol. 9
·期 2
·2000957
·
IF 3.404
Bo Li,Jianhong Zhao,Qingjie Lu,Shiqiang Zhou,Haitang Wei,Tianping Lv,Yumin Zhang,Jin Zhang,Qingju Liu
Applying metal–organic framework (MOF) materials to perovskite solar cells (PSCs) is an innovative and promising direction in the current photovoltaic field, especially in low-cost carbon-based PSCs without hole transport layer. Herein, a novel mesoporous anatase TiO 2 nanocrystalline with pie morphology, large specific surface area (SSA), and outstanding wettability is successfully prepared by sintering the NH 2 -MIL-125 at 500 °C for 6 h. The TiO 2 derived from NH 2 -MIL-125 possesses excellent penetration and crystallinity of perovskite in the electron transporting layer (ETL), and exhibits appropriate work function which matches relatively better with the conduction band of perovskite. Meanwhile, the power conversion efficiencies (PCEs) of the two PSC devices based on the as-prepared TiO 2 are 13.49% and 12.55%, respectively. Moreover, both of these devices exhibit good stability.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Jie Zhao,Bingzhang Li,Zongyang Liu,Danling Dai,Yuqi Li,Ronghui Shi,Hui Zhang
Sodium alginate (SA) aerogels have shown outstanding potential as regenerative adsorbent materials in the field of wastewater purification. Although SA aerogel adsorption has been demonstrated as a simple and resultful method for removing dyes, it has the limitation that it only transfers or concentrates dyes on the adsorbate, and does not actually degrade them. In this study, a three-dimensional (3D) MIL-125/g-C 3 N 4 /SA (CNTi-125@SA) composite aerogel with visible light photocatalytic activity was achieved for photocatalytic degradation of organic dyes, via in-situ growth, blending and freeze-drying strategy. The results demonstrate that CNTi-125@SA has high catalytic activity for the dyes rhodamine B (RhB), methylene blue (MB) and methyl orange (MO), and the degradation rate can reach up to 99.23%. Impressively, the composite aerogel exhibits excellent antibacterial ability, and the antibacterial rate can reach up to 100% against E. coli . In addition, the developed composite aerogel has excellent reusability and stability, and the degradation efficiency can still reach 85% after seven repeated tests. Owing to their high catalytic activity, excellent antibacterial properties and stability, the CNTi-125@SA composite aerogel can be potentially used in a wide range of dye wastewater purification.
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CELLULOSE
·
2019
·Vol. 26
·期 17
·9335-9348
·
IF 3.917
Yang Yingying,Huang Wei,Guo Zengpei,Zhang Shiyu,Wu Feng,Huang Jingjing,Yang Hongjun,Zhou Yingshan,Xu Weilin,Gu Shaojin
Abstract Superhydrophobic cotton fabrics with improved ultraviolet resistance were prepared via in situ growing NH 2 -MIL-125(Ti)(Ti-MOF) nanoparticles on cotton fibers and subsequently coating with polydimethylsiloxane (PDMS) under room temperature. The synergetic effect of Ti-MOFs nanoparticles and PDMS was critical and essential for obtaining a superhydrophobic coating with anti-UV property. The surface microstructure, chemical composition, and superhydrophobic property of the as-prepared fabrics were characterized by K/S value, scanning electron microscopy, X-ray photoelectron spectroscopy, energy dispersive spectroscopy, and water contact angle (WCA) measurements. The as-prepared cotton fabrics not merely exhibited desirable superhydrophobic property with a water contact angle (WCA) of 154.7 ± 0.7° and a sliding angle of 3.6°, but also displayed the considerable UV resistance. The oil–water separation, stability of UV protection and superhydrophobicity were also investigated. The superhydrophobicity, anti-ultraviolet property, and K/S value of as-prepared PDMS/Ti-MOFs@cotton fabrics were stable after 300 cycles of abrasion and 5 cycles of washing. The facile synthesis technique provided a simple method for scalable construction of multifunctional fabrics. Graphic abstract
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Baolin Yan,Lijuan Zhang,Zhiyong Tang,Mohammad Al-Mamun,Huijun Zhao,Xintai Su
Engineering metal-organic frameworks (MOFs) into hierarchical structured materials is crucial for providing a viable platform to construct efficient catalysts and broaden their applications in energy conversion and photocatalysis. Here, a simple and efficient solid-state pyrolysis of Ti-MOFs (NH 2 -MIL-125) sacrificial template combined with a photo-reduction process was developed to construct a series of hierarchical TiO 2 decorated with Pd nanoparticles. The hierarchical TiO 2 inherited the well-defined rounded rectangular submicron-tablet from NH 2 -MIL-125 precursor and was constituted of uniform anatase TiO 2 nanoparticles with an average size of 12 nm. Furthermore, the photocatalytic activity for the hydrogen production from water-methanol solution was improved by the optimization of the content of Pd as a cocatalyst, and the maximum was achieved with a Pd loading of 1.5%. The rate of H 2 evolution of 1.5% Pd decorated hierarchical TiO 2 (1.5% Pd/TiO 2 ) reached to 979.7 μmol h −1 and 112.7 μmol h −1 , under UV–vis light and simulated solar light, respectively. This unusual photocatalytic activity may be resulted from the positive synergetic effect of efficient light absorption, promoted separation and migration of photo-induced electron-hole carriers. The work highlights the potential of the MOFs-based hierarchical TiO 2 in the photocatalytic water splitting under solar light.
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APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Fei Ye,Houfen Li,Hongtao Yu,Shuo Chen,Xie Quan
Protons tend to bond strongly with unsaturated-coordinate S element located at the edge of nano-MoS 2 and are consequently reduced to H 2 . Therefore, increasing the active S atoms quantity will be a feasible approach to enhance hydrogen evolution. Herein we developed a porous TiO 2 derived from metal organic frameworks (MOFs) as scaffold to restrict the growth and inhibit the aggregation of MoS 2 nanosheets. As a result, the thickness of the prepared MoS 2 nanosheets was less than 3 nm (1–4 layers), with more edges and active S atoms being exposed. This few-layer MoS 2 -porous TiO 2 exhibits a H 2 evolution rate of 897.5 μmol h −1 g −1 , which is nearly twice as much as free-stand MoS 2 nanosheets and twenty times more than physical mixture of MoS 2 with porous TiO 2 . The high performance is attributed to that more active edge sites in few-layer MoS 2 -porous TiO 2 are exposed than pure MoS 2. This work provides a new method to construct MOFs derived porous structures for controlling MoS 2 to expose active sites for HER.
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JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 45
·期 19
·3754-3762
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IF 3.614
Zixin Chi,Xi Wu,Qiqi Zhang,Fengyang Zhai,Zesheng Xu,Dandan Zhang,Qing Chen
Titanium-based metal-organic framework MIL-125(Ti) was synthesized by the hydrothermal method of terephthalic acid and tetra butyl titanate in N-N ,dimethylformamide, and methanol. MIL-125(Ti) was characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, nitrogen adsorption-desorption, energy-dispersive X-ray spectroscopy, zeta potential, scanning electron microscope, and transmission electron microscopy. The results showed MIL-125(Ti) could be used as a potential adsorbent for protein separation and purification due to the high specific surface area, high stability, and strong hydrophobicity. As a result, MIL-125(Ti) had adsorption selectivity for immunoglobulin G, which was due to the hydrogen bond between MIL-125(Ti) and protein. At pH 8.0, the maximum adsorption efficiency of 0.25 mg MIL-125(Ti) for 300 μL 100 μg/mL immunoglobulin G was 98.3%, and its maximum adsorption capacity was 232.56 mg/g. The elution efficiency of immunoglobulin G was 92.4% by 0.1% sodium dodecyl sulfate. sodium dodecyl sulfate-polyacrylamide gel electrophoresis result demonstrated the successful isolation of highly purified immunoglobulin G from the human serum. Therefore, a new method of separation and purification of immunoglobulin G in human serum using titanium-based metal-organic framework MIL-125(Ti) as a solid-phase adsorbent was established, which broadened the application scope of metal-organic frameworks.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Chen Tai,Huarong Liu,Yuan Hu
Hydrogen is a very promising green energy alternative to fossil fuel owing to both environmental friendliness and high-energy nature; however, improving the hydrogen production efficiency of photocatalysts under visible light has remained a challenge. Herein, CdS/Pt/MIL-125 nanocomposite has been fabricated using γ-ray irradiation, where Pt and CdS nanoparticles with clean surfaces are well dispersed inside and on the surface of MIL-125, respectively, which greatly promotes effective space separation of photogenerated carriers and thus improves the visible-light catalytic activity. The hydrogen generation rate of CdS/Pt/MIL-125 nanocomposite is found up to 6783.5 μmol/(g·h) under visible-light illumination, which is 7.3 times that of CdS/MIL-125 without Pt as electron trap reservoirs and 4.4 times that of Pt/CdS/MIL-125 without effective spatial separation between CdS and Pt. The reason is attributed to the synergy of ternary CdS/Pt/MIL-125 with a unique ordered mesoporous structure that may widen the absorption range of the light, improve the efficiency of light harvesting, facilitate mass transfer, prevent the aggregation of CdS and Pt nanoparticles, suppress the electron–hole (e–h) pair recombination, and provide more active sites. Moreover, the loading amount of Pt or CdS nanoparticles also affects the activity of CdS/Pt/MIL-125 nanocomposite for visible-light catalytic H2 evolution. In view of the extensive use of γ-ray irradiation in industry, this research presents a rational route to the fabrication of novel hybrid photocatalysts for improved visible-light catalytic hydrogen evolution.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Shihui Wang,Yuzhou Xia,Guiyang Yan,Meixia Chen,Xuxu Wang,Ling Wu,Ruowen Liang
Inspired by the concept of frustrated Lewis pairs (FLPs) from homogeneous catalysis, an organic supramolecular bridged metal-organic frameworks (MOFs) heterojunction, i.e., a perylene-3,4,9,10-tetracarboxylic diimide@MIL-125(Ti)-NH 2 (denoted PDI@MTi) composite is successfully fabricated via a two-step synthesis method. Experimental characterisations and theoretical calculations reveal that in the obtained “TiO 5−x -ligand-PDI” FLPs, the unsaturated Ti-O clusters function as a Lewis acid to accept photogenerated electrons, and the PDI sites act as a Lewis base to capture photogenerated holes. With the unique structure characteristics, the PDI@MTi shows excellent photocatalytic activity toward the disinfection of Staphylococcus aureus and Cr(VI) reduction, with 1.0- and 10.3-fold enhancements, respectively, compared with unadorned MTi. The synergic effects of the micro polarisation field, multiple active sites, and a C-N bonded interface contributed to photoactivity enhancement. This work demonstrates the potential of using MTi as a platform for constructing FLPs-containing heterogeneous photocatalysts and provides new strategies to control carrier separation.
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高影响因子
Journal of Environmental Sciences
·
2026
·
IF 6.5
Xiaoxia Liang,Zewan Qin,Siwei Zhang,Rong Hai,Lingqing Gu,Xia Yang
30CNQDs@NMT/PMS achieved almost complete degradation of malathion within 30 min simulated sunlight irradiation. • CNQDs was integrated successfully to promote the charge separation efficiency as electron bridges and enhance the adsorption energy of PMS for activation revealed by DFT. • •OH and •SO 4 – were generated to attack the identified sites of malathion computed via Fukui function. • The intermediate products in the photocatalytic process were less toxic than malathion assessed by T.E.S.T. Malathion, an organophosphate pesticide widely used in agricultural fields across the world, has raised environmental concerns due to its persistence and toxicity. Thus, a novel photocatalyst was synthesized by integrating carbon nitrogen quantum dots (CNQDs) onto NH 2 -MIL-125(Ti) (NMT) via a solid-phase thermal polycondensation method. It was demonstrated that CNQDs served a dual function as electron bridges to facilitate charge separation and as peroxymonosulfate (PMS) adsorption activation sites substantially enhancing the photocatalytic activity, which was revealed by Density Functional Theory (DFT). Under simulated sunlight, 30CNQDs@NMT achieved nearly 100 % malathion removal within 30 min via PMS activation, exhibiting 8.1 times higher than NMT. While •OH and •SO 4 – acted as the dominant reactive species to attack the malathion sites. The toxicity of the intermediate products assessed by T.E.S.T. (Toxicity Estimation Software Tool) were much lower than malathion. Moreover, 30CNQDs@NMT performed effectively in real water matrices, demonstrating its potential for practical environmental applications. Download: Download high-res image (233KB) Download: Download full-size image
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Baofang Zhang,Ziyu Zengcai,Wenting Lin,Meijin Zhang,Yunhong Pi,Tiejun Wang
Photothermal synergism can effectively activate methanol at low operating temperature and significantly reduce the activation energy of the reaction, achieving more efficiently H 2 release from methanol reforming. Here, a novel hierarchical heterojunction that integrating photo- and thermal-active Cu 2 O catalytic species with in-situ derived NH 2 -MIL-125@TiO 2 framework was specifically designed for photothermal-driven aqueous phase reforming of methanol into H 2 . The afforded Cu 2 O/NH 2 -MIL-125@TiO 2 realized an outstanding photothermal H 2 production activity (apparent quantum efficiency of 22.3 % at 365 nm), ca. 13-times higher than that of thermocatalytic condition. Interestingly, the photothermal effect did confer the Cu 2 O/NH 2 -MIL-125@TiO 2 with unexpected activity at low temperature subsided to 100 °C and accelerated the activation of MeOH/H 2 O with an obvious reduction of activation energy from 82.62 kJ·mol −1 to 52.40 kJ·mol −1 . The improvement of catalyst stability and the promotion of charge separation also contributed to a long-term photothermal H 2 evolution activity with average rate of 1.49x10 6 μmolg Cu -1 h −1 and a total turnover number (TON) up to 5971 in 63 h, almost 125-fold promotion compared with Cu 2 O.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 31
·14828-14839
·
IF 3.3
Lin Dong,Yunlan Xu,Dengjie Zhong,Nianbing Zhong,Zhuofan Han,Yi Liu,Haixing Chang
The low electron–hole separation in the photoanode generally restricts the visible light response of photocatalytic fuel cell (PFCs). In this study, 5% NH2-MIL-125/g-C3N4/Bi2O3/Ti photoanode was synthesized and assembled with a PFC with Cu cathode to degrade rhodamine B and generate electricity. With visible light irritation, the maximum photocurrent density, maximum power density, and degradation rate of the PFC were 0.59 mA cm−2, 29.88 μW cm−2, and 97.48% (1 h), respectively. The major active species in the PFC were h+, ˙O2−, and ˙OH. The good performance of the PFC was ascribed to the formation of a double Z-type heterojunction in the 5% NH2-MIL-125/g-C3N4/Bi2O3/Ti photoanode so that the photoelectrons of NH2-MIL-125 and Bi2O3 directly combine with the photoholes of g-C3N4, making the photoholes of NH2-MIL-125 and Bi2O3 and the photoelectrons of g-C3N4 directly or indirectly involved in the RhB degradation process and generating electricity. Thus, the separation rate of the e−–h+ pairs in the photoanode and the capability of the PFC are greatly improved.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Youzhou He,Shuang Luo,Yuwei Tan,Mingzuo Chen,Haibo Zhou,Jianning Yu,Linjiang Pu,Yumin Huang,Min Fu,Xingyan Liu
Novel ionic state Co passivated carbon nanodots (Co-CDs) combined with NH 2 -MIL-125 as efficient photocatalysts Co-CDs/NH 2 -MIL-125 were fabricated in a convenient process for the first time. These materials exhibited excellent photocatalytic activity in both NO purification and hydrogen production under visible light irradiation. The NO purification rate of Co-CDs/NH 2 -MIL-125 increased to 46.6%, which was 20.2% and 13.4% higher than that of NH 2 -MIL-125 and CDs/NH 2 -MIL-125, respectively. Moreover, the hydrogen production efficiency of Co-CDs/NH 2 -MIL-125 reached 2261 μmol g −1 , which was 6.86 times and 3.54 times of the values for NH 2 -MIL-125 and CDs/NH 2 -MIL-125, respectively. The corresponding properties characterized by Mott-Schottky, UCPL , and in situ DRIFTS , indicated that the introduction of Co 2+ could not only passivate the CDs to further improve physicochemical properties, but also enhance the photocatalytic activity via the photosensitization and up-conversion effect. This research provides a promising strategy that adding active metal ions passivated CDs in the catalyst platform to improve photocatalytic performance.
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