Nanomaterials
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2022
·Vol. 12
·期 3
·542
·
IF 5.719
Liqin Yang,Zhihong Chen,Xin Wang,Mingliang Jin
The practical application of photocatalytic H2-evolution is greatly limited by its sluggish charge separation, insufficient active sites, and stability of photocatalysts. Zero-dimensional (0D) Ti3C2MXene quantum dots (MQDs) and amorphous Ti(IV) have been proven to be potential substitutes for noble co-catalyst to accelerate the separation of photogenerated electron-hole pairs and prevent the self-oxidation of photocatalysts, leading to better photocatalytic H2-evolution performance with long-term stability. In this study, amorphous Ti(IV) and MQDs co-catalysts were successfully deposited on ZnIn2S4(ZIS) microspheres composed of ultra-thin nanosheets via a simple impregnation and self-assembly method (denoted as MQDs/ZIS/Ti(IV)). As expected, the optimal MQDs/ZIS/Ti(IV) sample exhibited a photocatalytic H2-evolution rate of 7.52 mmol·g−1·h−1and excellent photostability without metallic Pt as the co-catalyst in the presence of Na2S/Na2SO3as hole scavenger, about 16, 4.02 and 4.25 times higher than those of ZIS, ZIS/Ti(IV), and MQDs/ZIS, respectively. The significantly enhanced photocatalytic H2-evolution activity is attributed to the synergistic effect of the three-dimensional (3D) flower-like microsphere structure, the amorphous Ti(IV) hole co-catalyst, and a Schottky junction formed at the ZIS–MQDs interface, which offers more active sites, suppresses self-photocorrosion, and photo-generates the charge recombination of ZIS.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 8
·期 8
·2693-2699
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IF 6.641
Ge Ma,Chaoqun Shang,Mingliang Jin,Lingling Shui,Qingguo Meng,Yongguang Zhang,Zhang Zhang,Hua Liao,Ming Li,Zhihong Chen,Mingzhe Yuan,Xin Wang,Chuanyi Wang,Guofu Zhou
In this work, a series of Ti(IV)/ZnIn2S4 composite photocatalysts were demonstrated by a facile two-step method. A Ti(IV) component was introduced into the flower-like ZnIn2S4 microspheres, which could act as an effective hole co-catalyst, shorten the charge migration distance, provide abundant active sites, inhibit the recombination of electron–hole pairs and mitigate the photocorrosion effect of ZnIn2S4. Benefiting from these favorable properties, the amorphous Ti(IV) modified ZnIn2S4 showed excellent H2 evolution performance which can reach 3685.2 μmol g−1 h−1, higher than that of pure ZnIn2S4 (2335.5 μmo g−1 h−1). Meanwhile, the modified ZnIn2S4 exhibits good stability after several consecutive hydrogen production runs. The photocatalytic purification of methyl orange (MO) in simulated wastewater was further tested. The degradation efficiencies, TOC removal, and highest hydrogen production were respectively 95%, 28.8% and 2650 μmol g−1 h−1. These results may provide an inspiration for tailoring multifunctional semiconductors with amorphous metal ions, which can be used as a photocatalytic H2 evolution catalyst with high-efficiency, as well as purifying the wastewater simultaneously.
研究领域:
材料科学
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环境科学
·
化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 2
·1-10
·
IF 5.479
Zhang Kaina,Hu Dehua,Deng Suimin,Han Meng,Wang Xiangfeng,Liu Hailing,Liu Yuan,Xie Mengxia
A novel magnetic nanomaterial for use in metal ion based affinity chromatography is described. It is based on the chelation between the phosphate groups of phytic acid (PA) and Ti(IV) ions. Due to the large number (6) of phosphate groups of PA, it has a large capacity for Ti(IV) ions. PA was first immobilized on magnetite nanoparticles (PA-MNPs) and then loaded with Ti(IV) ions to obtain the sorbent (Ti-PA-MNPs). The fraction of Ti(IV) ions on the surface of PA-MNPs that is exposed to the solution binds the phosphate groups of phosphopeptides. The bound phosphopeptides can then be magnetically separated. The method was applied to the enrichment of the phosphopeptides in a β-casein tryptic digest. A tryptic digest of bovine serum albumin (BSA) was added at a molar ratio (β-casein to BSA) of 1:2000 to study selectivity. The phosphopeptides were quantified by mass spectrometry. The limit of detection can be as low as 8 × 10 −10 mol L −1 . This sorbent has a high absorption capacity (53.5 μg mg -1 ) and shows good recoveries (90%). As many as 2145 phosphopeptides were isolated from 500 μg tryptic digest of a rat liver lysate after enrichment by Ti-PA-MNPs. This is superior to that (1568 phosphopeptides) of commercial TiO 2 kit.
Schematic presentation of fabrication for a novel modified magnetic nanomaterial (Ti-PA-MNPs) based on the chelation of phytic acid (PA) with Ti(IV) ions. Ti-PA-MNPs were successfully applied to enriching low abundance phosphopeptides from biosamples in mass spectrometric analysis.
研究领域:
分析化学
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生物化学
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纳米技术
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质谱分析
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Wenqing Hou,Chen Chen,Diya Xie,Yiming Xu
Metal–organic frameworks (MOFs) as photocatalysts have received increasing attention. In this work, a dual metal-substituted UiO-66-NH2 (Ti/Ce-MOF) containing different Ti/Ce mole ratios (x = 0–2.46) has been prepared via post-synthetic exchange between Ce-UiO-66 and TiCl4, followed by amination. The solid had a high surface area (828–937 m2/g) and a large pore volume (0.451–0.507 m3/g). Under visible light, Ti/Ce-MOF showed x-dependent activity for H2O reduction and oxidation on a film electrode, respectively. However, such a change for H2 evolution in a Na2S/Na2SO3 aqueous solution was observed only after CdS loading. In combination with the photoluminescence and band parameters, we propose that the photoactivity of Ti/Ce-MOF for redox reaction is determined by its ability for electron transfer. Furthermore, there is an interfacial electron transfer from Ti/Ce-MOF to CdS and a hole transfer from CdS to Ti/Ce-MOF, respectively, significantly improving the efficiency of charge separation for redox reactions. This work offers a new insight that Ti substitution benefits the performance of Ce-based MOF.
研究领域:
材料科学
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化学
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纳米技术
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光化学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Zixing Xu,Yonglei Wu,Hao Wu,Nianrong Sun,Chunhui Deng
Salivary phosphoproteome holds great promise in clinic diagnosis. For profiling of salivary phosphoproteome, it is essential to develop efficient enrichment methods prior to mass spectrum (MS). Among developed enrichment strategies, immobilized metal ions affinity chromatography (IMAC) has exhibited outstanding performance. In this work, we report a coherent approach where polydopamine (PDA) is first utilized to form mesoporous structure through soft templating method, then chelated with Ti 4+ to construct hydrophilic polydopamine-derived magnetic mesoporous nanocomposite (denoted Fe 3 O 4 @mPDA@Ti 4+ ). In virtue of the merits including ordered mesoporous channels, appropriate superparamagnetism , and abundant Ti 4+ , the enrichment strategy based on Fe 3 O 4 @mPDA@Ti 4+ combined with MS is employed for accurate identification of phosphopeptides in β-casein digest and human saliva. As expected, Fe 3 O 4 @mPDA@Ti 4+ revealed a great selectivity (1:200) and a low detection limit (0.1 fmol μL −1 ) toward phosphopeptides. More importantly, the further successful capture of phosphopeptides from human saliva indicated the prominent potential of this method for seeking phosphopeptide biomarkers in further analysis.
研究领域:
生物化学
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医学诊断
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分析化学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 45
·期 1
·265-270
·
IF 4.197
Ye Zhang,Zhen-An Qiao,Junmin Liu,Xue Wang,Shuo Yao,Tao Wang,Bing Liu,Yali Ma,Yunling Liu,Qisheng Huo
Ti(IV)-based complexes have been demonstrated as candidates for preparing hybrid and functional materials, and have received considerable attention. In this paper, hierarchical hollow titania materials with different surface nanostructures were synthesized successfully using a hydrothermal process via the transformation of a Ti(IV) oxalate complex as a precursor. Different concentrations of ammonia were used to adjust the morphologies and crystalline forms of the hydrothermal products. The hierarchical hollow anatase titania materials, HHTM-1 (cal) and HHTM-2 (cal), have high surface areas of up to 132 m2 g−1 and 84 m2 g−1, respectively, and show superior performance for dye degradation in water.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
TETRAHEDRON
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2016
·
IF 2.645
Yufei Wu,Jie Hou,Yuliang Liu,Mingfu Zhang,Chen-Ho Tung,Yifeng Wang
The highly efficient and chemoselective α,α′-bis-substitution of alkanones is important in organic synthesis. Herein, a dimeric titanium cluster, Ti 2 Cl 2 (OPr i ) 6 ·2HOPr i ( Ti 2 ), is used in the Claisen–Schmidt condensation reaction, for the selectively activation of symmetrical ketones containing α,α′-methylene groups and production of α,α′-bis-substituted alkanones in high efficiency and chemoselectivity. The high efficiency and chemoselectivity can be extended to a variety of typical alkanones and aromatic aldehydes . Both of the oxo-bridged dimeric motif of Ti 2 and the ionic Ti–Cl bond are responsible for the high efficiency and chemoselectivity.
研究领域:
有机化学
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催化
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无机化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Beibei Liu,Baoyu Gao,Kangying Guo,Jingwen Pan,Qinyan Yue
Safe and effective coagulants are necessary for surface water treatment. The polyaluminum-titanium chloride (PATC) composite coagulant has promise but its application is limited due to the lack of fundamental theoretical research. We prepared a series of novel PATCs and investigated the effects of the interaction between Al (III) and Ti (IV) on the chemical species distribution, physicochemical properties and coagulation efficiencies. The Al-O-Ti bonds observed in the PATC infrared spectra were predicted by density functional theory computation to appear in 4-atom rings in the structure. The differences in Al species distribution of PATC and PAC illustrated that the introduction of Ti retarded the hydrolysis of monomeric Al species (Al a ) and medium polymerized Al species (Al b ) to colloidal Al species (Al c ) at low B levels, but the transformation was promoted at high basicities (B). PATCs exhibited higher charge densities and larger molecular weights than PAC at the same B levels, which contributed to their excellent coagulation efficiencies. PATC with low B values but high Al/Ti molar ratios mainly provided charge neutralization in removal of humic acid kaolin, while the dominant coagulation mechanism converted from charge neutralization to sweeping and bridging effects at high B values or low Al/Ti molar ratios.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
ANALYST
·
2020
·Vol. 145
·期 12
·4341-4351
·
IF 3.978
Fengjuan Ding,Yameng Zhao,Haiyan Liu,Weibing Zhang
Selective, sensitive and efficient phosphopeptide enrichment is significant in understanding phosphorylation-regulated processes and finding potential biomarkers. Magnetic materials have significant advantages for the separation and enrichment of modified peptides and proteins. In this work, we fabricated a core–shell magnetic Ti4+-functionalized covalent organic framework composite (denoted as Fe3O4@SiO2@TpPa-Ti4+) to selectively capture phosphopeptides in biosamples. The specific porous structure makes high surface area, which provides space and more affinity sites to binding titanium ions. The loading capacity of titanium ions was as high as 14% (wt%). Calculated by the MS results of α-casein tryptic digests, the binding capability could reach 200 mg g−1. Fe3O4@SiO2@TpPa-Ti4+ nanoparticles also demonstrate high sensitivity (above 0.2 fmol μL−1) and selectivity (α-casein : BSA = 1 : 5000). 1083 phosphopeptides were identified within two LC-MS/MS replicates with 91.8% specificity (phosphopeptides/all identified peptides). These MS results demonstrate that with the aid of the magnet, this method based on the magnetic titanium-functionalized covalent organic framework composite is applicable to achieve rapid, selective and efficient phosphopeptide analysis.
研究领域:
生物化学
·
分析化学
·
蛋白质组学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Hongli Xie,Binghong Chen,Hongjun Lin,Renjie Li,Liguo Shen,Genying Yu,Lining Yang
Continuous increasing discharge of industrial oily wastewater and frequent occurrence of oil spill accidents have taken heavy tolls on global environment and human health. Organic-inorganic modifications can fabricate superhydrophilic/submerged superoleophobic membranes for efficient oil-water separation/treatment though they still suffer from complex operation, non-environmental friendliness, expensive cost or uneven distribution. Herein, a new strategy regarding tannic acid (TA)-Ti(IV) coating and CaCO 3 -based biomineralization through simple inkjet printing processes was proposed to modify polyvinylidene fluoride (PVDF) membrane, endowing the membrane with high hydrophilicity (water contact angle (WCA) decreased from 86.01° to 14.94°) and underwater superoleophobicity (underwater contact angle (UOCA) > 155°). The optimized TA-Ti(IV)-CaCO 3 modified membrane possessed perfect water permeation to various oil/water emulsions (e.g., 355.7 L·m −2 ·h −1 for gasoline emulsion) under gravity with superior separation efficiency (>98.8 %), leading the way in oil/water emulsion separation performance of PVDF membranes modified with polyphenolic surfaces to our knowledge. Moreover, the modified membrane displayed rather high flux recovery after eight cycles of filtration while maintaining the original excellent separation efficiency. The modification process proposed in this study is almost independent of the nature of the substrate, and meets the demand for simple, inexpensive, rapid preparation of highly hydrophilic antifouling membranes, showing abroad application prospect for oil-water emulsion separation/treatment.
研究领域:
环境工程
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材料科学
·
化学工程
·
水处理
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DOI
PubMed
高影响因子
ELECTROPHORESIS
·
2020
·Vol. 42
·期 4
·465-472
·
IF 3.081
Qiuyue Xu,Beibei Chen,Man He,Bin Hu
Ti (IV)-modified vinyl phosphate magnetic nanoparticles (Fe 3 O 4 @SiO 2 @KH570-PO 4 -Ti (IV)) was prepared for simultaneous extraction of multiple arsenic species, followed by high performance liquid chromatography (HPLC)– inductively coupled plasma mass spectrometry (ICP-MS) analysis. Inorganic arsenic (iAs), dimethyl arsenic acid (DMA), monomethyl arsenic acid (MMA), p -amino phenyl arsenic acid ( p -ASA), 4-hdroxyphenylarsenic acid (4-OH), phenyl arsenic acid (PAA), and 3-nitro-4-hydroxyphenylarsenic acid (ROX) were investigated as interest analytes. It was found that they were quantitatively adsorbed on Fe 3 O 4 @SiO 2 @KH570-PO 4 -Ti (IV) at pH 5, and desorbed completely with 0.1 mol/L sodium hydroxide solution. Enrichment factor of 100-fold was obtained by consuming 100 mL sample solution. Under the optimal conditions, the method combining MSPE with HPLC-ICP-MS presented a linear range of 1–5000 ng/L for seven arsenic species. The limits of detection were 0.39, 0.60, 0.23, 1.85, 0.54, 0.48, and 0.84 ng/L for DMA, MMA, p -ASA, iAs, 4-OH, PAA, ROX, with the relative standard deviations ( c = 10 ng/L, n = 7) of 3.6, 3.9, 5.5, 12.4, 6.1, 5.8, 5.0, respectively. The accuracy of the method was validated by analyzing BCR 627 Tuna fish. The application potential of the method was further evaluated by chicken muscle and liver samples. No target arsenic species were detected in these samples, and good recoveries (80.6–123%) were obtained for the spiked samples at low, medium, and high concentration levels.
研究领域:
分析化学
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环境科学
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食品科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Xueting Zhao,Ning Jia,Lijuan Cheng,Lifen Liu,Congjie Gao
Metal-polyphenol coordination networks have been actively explored as a facile, rapid and green platform for developing materials. In this study, novel antifouling hybrid membranes are successfully prepared via in situ assembling metal-polyphenol coordination networks and are proposed for oil/water separation application. Based on the coordination-driven cross-linking and assembling of Ti IV and TA within polyvinylidene fluoride (PVDF) membrane matrix, TA-Ti coordination networks are successfully introduced and uniformly distributed in the as-prepared PVDF/TA-Ti membranes. The effects of the embedded TA-Ti coordination networks on both surface morphologies and pore structures of PVDF/TA-Ti membranes are investigated. The surface chemical compositions of PVDF/TA-Ti membranes are analyzed by energy-dispersive X-ray (EDX) and Fourier transform infrared spectroscopy (FTIR). The water contact angle analysis and DSC study on bound water content reveal the outstanding hydration capability of PVDF/TA-Ti membranes, indicating the higher underwater superoleophobicity and antifouling property of PVDF/TA-Ti membranes. The as-prepared PVDF/TA-Ti membranes exhibit remarkably improved antifouling performance with the flux recover ability increased to a maximum level about 100% for the filtration of oil-in-water emulsions. Overall, this study highlights the promising antifouling potential of TA-Ti coordination networks in designing antifouling membranes, and proposes a facile in situ hybridization method for preparing antifouling membranes derived from versatile metal-polyphenol coordination networks.
研究领域:
材料科学
·
化学工程
·
环境工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）