Scientific Reports
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2017
·Vol. 7
·期 1
·1-9
·
IF 4.259
Chen Yipeng,Wang Hanwei,Dang Baokang,Xiong Ye,Yao Qiufang,Wang Chao,Sun Qingfeng,Jin Chunde
Nacre, the gold standard for biomimicry, provides an excellent example and guideline for assembling high-performance composites. Inspired by the layered structure and extraordinary strength and toughness of natural nacre, nacre-like nanolignocellulose/poly (vinyl alcohol)/TiO 2 composites possessed the similar layered structure of natural nacre were constructed through hot-pressing process. Poly (vinyl alcohol) and TiO 2 nanoparticles have been used as nanofillers to improve the mechanical performance and synchronously endow the superior photocatalytic activity of the composites. This research would be provided a promising candidate for the photooxidation of volatile organic compounds also combined with outstanding mechanical property.
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PubMed
高影响因子
Nanoscale
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2017
·Vol. 9
·期 43
·16764-16772
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IF 7.367
Yayun Hong,Chenlu Pu,Hongli Zhao,Qianying Sheng,Qiliang Zhan,Minbo Lan
In this work, we fabricated a yolk–shell magnetic composite that contains mesoporous TiO2 as the inner shell and flowerlike NiO as the outer shell (denoted as Fe3O4@H-TiO2@f-NiO) to reduce the limitations of single-component metal oxides in phosphopeptide enrichment. The NiO nanosheets play a synergistic role in phosphopeptide enrichment. And the unique flowerlike structure of NiO with sufficient space can facilitate the reversible insertion/extraction of peptides, which will have less impact on the enrichment process of the inner TiO2 shell. The yolk–shell structure and two types of porous nanostructures endowed this composite with a high surface area (156.58 m2 g−1) and a large pore volume (0.37 cm3 g−1). Owing to the high surface area and combined properties of TiO2 and NiO, the Fe3O4@H-TiO2@f-NiO microspheres showed a better performance for phosphopeptide enrichment than the same material without NiO nanosheets (Fe3O4@H-TiO2). According to the LC-MS/MS results, 972 unique phosphopeptides were identified from HeLa cell extracts with a high selectivity (91.9%) by Fe3O4@H-TiO2@f-NiO relative to 837 phosphopeptides (selectivity: 60.2%) by Fe3O4@H-TiO2. The results demonstrated that, compared with single-component metal oxides, composite metal oxides could enhance the selectivity and sensitivity for phosphopeptide enrichment.
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JOURNAL OF NANOPARTICLE RESEARCH
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2017
·Vol. 19
·期 5
·1-11
·
IF 2.02
Feng Jiantao,Wang Yechen,Hou Yanhui,Li Liangchao
Hierarchical structured ZnFe 2 O 4 @reduced graphite oxide@TiO 2 (ZnFe 2 O 4 @RGO@TiO 2 ) nanocomposite was prepared by an electrostatic layer-by-layer route, which played a synthetic effect of Fenton oxidation of ZnFe 2 O 4 and photocatalytic oxidation of TiO 2 to degrade fulvic acid (FA) solution under visible-light irradiation. In this method, RGO, as the middle layer, can effectively promote the photo-induced electron flow between the ZnFe 2 O 4 and TiO 2 and further improve the efficiency of the photo-Fenton oxidation. The influencing factors on photo-Fenton oxidation, including solution pH, catalyst, and H 2 O 2 dosage, have also been investigated. The results illustrated that the ternary composite presented the enhanced catalytic performance. Under visible light irradiation, the degradation efficiency of the sample on the FA solution can reach 95.4% within 3 h. In addition, the catalyst exhibited superior stability and reusability, and its degradation efficiency was still up to 90% after 5 cycles. Therefore, the composite will be a kind of efficient photocatalyst and had a promising application for visible-light driven destruction of organic pollutants.
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RSC Advances
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2017
·Vol. 7
·期 42
·26136-26144
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IF 3.108
Shujie Wang,Zhuan Yi,Xueting Zhao,Yong Zhou,Congjie Gao
We report a promising strategy for the preparation of nano-aggregation suppressed thin film nanocomposite (TFN) membranes via an in situ method. Tetra-butyl ortho-titanate (TBOT) was added to the organic phase to prepare the new TFN membranes (in situ TFN). The in situ addition of TBOT produced TiO2 nanoparticles in the polyamide layer during interfacial polymerization. In comparison with TFN membranes fabricated by the conventional method (ex situ TFN preparation), the nanoparticles in the in situ synthesized TFN membranes exhibited better dispersion, and more TiO2 nanoparticles were observed on the membrane surface. Surprisingly, at a rather low concentration of TBOT (250 mg L−1), the water flux of the in situ TFN membranes was increased by more than 50% in comparison with that of a pure polyamide membrane with negligible rejection loss, which was close to the performance of the sate-of-the art TFN membranes. The surface properties of the membranes were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, X-ray photoelectron spectroscopy (XPS), and contact angle analysis. Our results demonstrate that in situ generation of nano-additives can effectively suppress nano-agglomeration and improve the performance and surface features of TFN membranes.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
·
IF 9.446
Ya-nan Zhang,Ning Qin,Jianyun Li,Shengnan Han,Pan Li,Guohua Zhao
An anatase TiO 2 with {001} facet exhibits high oxidation activity towards the degradation of wastewater. The impact of {001} facet exposure degree on the degradation oxidation kinetics and mechanism is still unclear and urgently needs to be discussed. The photoelectrocatalytic (PEC) degradation of bisphenol A (BPA) in wastewater using facet-controlled nanocrystalline {001} TiO 2 /carbon aerogel (CA) photoelectrodes was then investigated in this study. Nano-sized anatase {001} TiO 2 crystals with different {001} facet exposure degrees of high (90%), medium (48%) and low (15%) were constructed on a CA substrate via electrophoretic deposition. A positive correlation was found between the {001} facet exposure and the photocurrent density, electron carrier concentration and the total amount of OH. Nearly 100% BPA removal efficiency was shown on the 90%-{001}TiO 2 /CA in 6 h. The rate constant ( k ) value was 0.454 h −1 and the TOC rate was 83%. They are 1.8 and 1.8 times greater than those obtained on the 48%-{001}TiO 2 /CA, as well as 3.5 and 2.4 times greater than those on the 15%-{001}TiO 2 /CA, respectively. The greatly promoted PEC oxidation activity of 90%-{001}TiO 2 /CA is due to its more rapidly accumulated intermediates products than other two photoelectrodes, which then completely mineralize into CO 2 and H 2 O. This is mainly because of the highest oxidation sites existed on the 90%-{001}TiO 2 surface and the efficient separation of electron-hole pairs between the {001} TiO 2 and CA under the electric fields.
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JOURNAL OF POROUS MATERIALS
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2017
·Vol. 25
·期 1
·189-198
·
IF 1.624
Feng Zhouzhou,Lv Xiang,Wang Tianhe
TiO 2 porous ceramic/Ag–AgCl composite was prepared by incorporating AgCl nanoparticles within the bulk of TiO 2 porous ceramic followed by reducing Ag + in the AgCl particles to Ag 0 species under visible light irradiation. The porous TiO 2 ceramic was physically robust and chemically durable, and the porous structure facilitated the implantation of AgCl NPs. Compared with the bare TiO 2 ceramic, TiO 2 porous ceramic/Ag–AgCl composite exhibited higher photocatalytic performance for the degradation of MO and RhB under visible light irradiation. The reaction rate constants k of MO and RhB degradation over TiO 2 porous ceramic/Ag–AgCl composite was respectively 6.25 times and 3.62 times higher than those recorded over the bare TiO 2 porous ceramic. The photocatalytic activity showed virtually no decline after four times cyclic experiments under visible light irradiation. Scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, UV–Vis diffuse reflectance spectroscopy, photoluminescence spectra and X-ray photoelectron spectroscopy were used to characterize the TiO 2 porous ceramic/Ag–AgCl composite.
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2024
·
IF 3.7
Yunwu Yu,Yan Wu,Yong Yuan,Yan Wang,Changwei Xu,Yanfeng Fang,Yaxin Gu,Peng Liu,Ye Wan,Lihua Wang,Xiaowei Sun
Based on the previous study, the properties, separation efficiencies, and anti-fouling performances of TiO 2 nanoparticle embedded PEEKWC/PEI cross-linked ultrafiltration membrane made via non-solvent-induced phase separation were investigated. SEM, contact angle measurement , ATR-FTIR, and other methods were used to characterize the membranes, and then the pure water flux (PWF) and dye rejection were measured. The TiO 2 nanoparticle embedded PEEKWC/PEI cross-linked ultrafiltration membranes were prepared by stepwise solution blending method. Compared to the pristine PEEKWC/PEI cross-linked ultrafiltration membrane, the anti-fouling and pure water flux performances were enhanced as the addition of TiO2 nanoparticles. The pure water flux of TiO 2 nanoparticle embedded membranes was significantly increased and could even reach 3368.2 LMH at 5 bar much greater than that of the pristine PEEKWC/PEI ultrafiltration membrane (1423.8 LMH), remaining a retention rate for BBR higher than 98.5%. And the TiO 2 nanoparticle embedded PEEKWC/PEI cross-linked ultrafiltration membranes exhibited a certain degree of increase of FRR (higher than 80%) after UV illumination. After a series of characterisation, the dye wastewater treatment property of membranes was assessed through filtration of Coomassie brilliant blue and Congo red solutions and researches were conducted on the anti-fouling capabilities of membranes. The TiO 2 nanoparticle embedded PEEKWC/PEI cross-linked ultrafiltration membranes exhibited self-cleaning efficiency with lower irreversible fouling ratio. The pure water flux recovery ratio following dye fouling was higher after being exposed to UV irradiation, which could be attributed to the TiO 2 nanoparticles' photocatalytic destruction of organic pollutants .
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DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 8
·3467-3477
·
IF 3.3
Wenhui Hu,Zhongxin Song,Lingna Sun,Lei Zhang,Qianling Zhang,Xiangzhong Ren,Yongliang Li
Efficient separation of photogenerated charge carriers is essential for maximizing the photocatalytic efficiency of semiconductor materials in oxygen evolution reactions (OER). This study presents a novel trimetallic photocatalyst, MIL-100(Fe)/TiO2/CoOx, synthesized through a facile microwave-assisted hydrothermal method followed by atomic layer deposition (ALD). The porous MIL-100(Fe) serves as a support for the sequential deposition of TiO2 and CoOx layers via ALD, which enhances electron–hole pair separation and minimizes their recombination. Characterization using transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) confirms the uniform deposition of TiO2 and CoOx layers on the MIL-100(Fe) surface. The optimized photocatalyst, processed with 20 deposition cycles of Co, exhibits exceptional photocatalytic OER performance, with an oxygen evolution rate of 558.3 μmol g−1 h−1. This enhancement in activity is attributed to the synergistic interaction between the spatially separated TiO2 and CoOx cocatalysts, which facilitates efficient charge transfer and increases the number of active sites. These findings highlight the potential of ALD-fabricated heterostructures in the development of advanced photocatalysts for sustainable energy production.
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AQUA-Water Infrastructure Ecosystems and Society
·
2024
·Vol. 73
·期 8
·1671-1682
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IF 2.1
Li Dajie,Chu Xiao,Chen Chen,Cheng Jun,Huang Weiwei,Yang Fei,Yi Xuesong
To further investigate the synergistic effects of Fe (Ⅲ) and graphene derivatives with varying degrees of oxidation for photocatalysis, commercial titanium dioxide nanoparticles and graphene oxide were employed as precursors to synthesize the catalyst in this study. Graphene oxygenated derivatives and Fe (Ⅲ)-modified titanium dioxide photocatalysts with different oxidation degrees were prepared using a simple one-step solvothermal method. The results demonstrated that the photocatalytic performance in degrading rhodamine B and sulfamethoxazole was enhanced with an increase in the oxidation degrees of graphene materials. Through the combined action of delocalized conjugated π electrons as electron transfer mediators, Fe (Ⅲ) as an electron trap, and photosensitization reactions, titanium dioxide exhibited exceptional photocatalytic properties with the assistance of graphene derivatives and Fe (Ⅲ) co-catalysts in the degradation of organic compounds. We developed a distinctive and straightforward method for fabricating graphene oxide and Fe(III) co-modified titanium dioxide catalysts. The quantity of oxygen-containing functional groups on the surface of graphene oxide precursors was controlled through thermal reduction. The synergistic impact of graphene derivatives and Fe (III) dual co-catalysts was further enhanced.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fangyuan Sun,Haibo Wu,Chengwei Jiang,Yonghao Chen,Yanan He,Shiqi Zu,Fengyu Su,Yanqing Tian,Yan Jun Liu
Photochromic and electrochromic devices have attracted remarkable attention due to their advantages of low power consumption, eye-friendliness, and broad application potential. However, developing dual-responsive devices with nice memory effect and rapid switching ability remains challenging. Here we report a novel strategy for fabricating dual-responsive photo-electrochromic device (PECD) based on TiO 2 -Prussian blue (PB) composite film and a novel extended viologen FHP . Exploiting the photocatalytic properties of TiO 2 , we successfully fabricated dual-responsive thin films and incorporated FHP as a complementary material to enhance the performance of the device. Notably, the resultant PECD exhibited remarkable performance, including long optical memory (33.91 h), fast response (4.6 s for coloring, 10.4 s for bleaching), high contrast (ΔT is 77.2 % at 692 nm), and excellent cycling stability (ΔT loss is smaller than 3.1 % after continuous working for 1000 cycles), highlighting their potential for advanced optical applications.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Tong Xue,Dunjie Fang,Leilei Si,Yunjie Yin
Textiles with antibacterial and antiultraviolet properties have gained significant attention because of their ability to protect the human body. This study presents the design and synthesis of a Schiff base for chitosan modified with salicylaldehyde and titanium dioxide (SCSB-Si-TiO2). SCSB-Si-TiO2 was coated onto cotton fabrics by using a layer-by-layer self-assembly method, resulting in functional cotton fabrics (SCSB-Si-TiO2/cotton) with excellent antibacterial and antiultraviolet properties. This functional textile demonstrated excellent antibacterial effects with inhibition rates of 95.22% against Escherichia coli and 98.99% against Staphylococcus aureus. Moreover, SCSB-Si-TiO2/cotton exhibited outstanding antiultraviolet characteristics, with a ultraviolet protection factor (UPF) value of 110.9, and maintained a UPF value above 82 even after 25 washing cycles. Additionally, SCSB-Si-TiO2/cotton exhibited good hydrophobicity with a water contact angle of 123.6°. The breathability of SCSB-Si-TiO2/cotton decreased slightly, and its tensile strength increased, which was sufficient to meet daily life requirements. This study presents an approach to the development of multifunctional textiles.
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SOLID STATE SCIENCES
·
2024
·
IF 3.4
Yanping Dong,Qi Guo,Xiqiang Tian,Muhammad Zahid
The amalgamation of an appropriate cocatalyst is a proficient technique to expand the efficacy of precious Pt-based catalytic materials. In this study, Mo 2 N–TiO 2 with regularly distributed Mo 2 N particles were simply prepared for the deposition of precious Pt nanoparticles (NPs). Numerous techniques were implemented to thoroughly explore, how synthesis method influence the bulk structural, interfacial and cata1ytic features of the as-prepared 3 wt%Pt/TiO 2 and 3 wt%Pt/Mo 2 N–TiO 2 catalytic materials. The catalytic results obviously show that the 3 wt%Pt/Mo 2 N–TiO 2 catalyst has exceptional hydrogenation performance when compared to 3 wt%Pt/TiO 2 catalyst. The 3 wt%Pt/Mo 2 N–TiO 2 catalyst displayed high conversion (72.4 %) of cinnamaldehyde (CAL) with a maximum selectivity (82.1 %) towards C O bond. The excellent hydrogenation performance is attributed to the synergistic interaction taking place between Pt NPs and Mo 2 N entities of 3 wt%Pt/Mo 2 N–TiO 2 . Also, the enhanced standardized dispersal of Pt NPs on the Mo 2 N–TiO 2 surface causes more exposed Pt 0 sites on the 3 wt%Pt/Mo 2 N–TiO 2 surface, which is productive for the improved activation and conversion of C O bond of CAL to yield COL . In addition, the 3 wt%Pt/Mo 2 N–TiO 2 catalyst retained its higher catalytic activity for consecutive five successive rounds without substantial loss in either conversion or selectivity.
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