COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Yan Wang,Shengzhe Zhao,Yi Yang,Raul D. Rodriguez,Anya Lipovka,Yun Lu,Honglan Huang,Jinju Chen
Ag nanoparticle-decorated Bi 2 O 3 -TiO 2 heterogeneous photocatalysts were successfully obtained by combining facile sacrificial templates and photoreduction . The as-synthesized Ag@Bi 2 O 3 -TiO 2 photocatalysts with a narrow band gap of 2.40 eV exhibited considerable photocatalytic activity to degrade rhodamine B (RhB) and tetracycline hydrochloride (TCH), and the removal efficiency reached 100% and 92%, respectively. Ag@Bi 2 O 3 -TiO 2 photocatalysts also exhibited stable recyclability for the degradation of RhB and TCH. Trapping experiments helped determine the major reactive oxidative species for TCH photodegradation . The desirable photodegradation performance is mainly attributed to improved light absorption , enhanced charge separation, and strong redox capacity of Ag@Bi 2 O 3 -TiO 2 nanostructures with S-scheme heterojunction . This work provides a facile avenue to construct heterogeneous tubular nanostructures with intensive photoabsorbance and effective photocatalysis to degrade organic contaminants.
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高影响因子
THIN SOLID FILMS
·
2014
·
IF 1.867
Fei Ge,Jun Lin,Xiaoxiao Huang,Kui Cheng,Huiming Wang,Wenjian Weng
For orthopedic implant coatings, excellent biological performance and anti-infective property have been both increasingly required for implantation surgery. In this work, TiO 2 nanorod films with good cellular responses and mesoporous bioactive glass (MBG) with good drug loading and release ability were adopted, and MBG-incorporated TiO 2 nanorod films were prepared by the sol–gel technique. The effects of TiO 2 nanorod density and MBG composition on the formation of the incorporated films were investigated. The results show that T-MBG (SiO 2 /CaO/P 2 O 5 /TiO 2 = 80/5/5/10) tightly cohered to TiO 2 nanorods in the films, and the degree of T-MBG incorporation ranged from about 100 nm to 300 nm of exposed TiO 2 nanorods in height. T-MBG incorporation had a positive role in the cytocompatibility of the films. Importantly, T-MBG incorporation improved greatly the drug release behavior of the TiO 2 nanorod films. The present work provides an approach to build organized nanostructure films on implant surfaces with satisfactory biological performance and essential anti-infective ability.
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高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2015
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IF 3.65
Song Shen,Lin Wu,Jiejie Liu,Meng Xie,Haijun Shen,Xueyong Qi,Yongmin Yan,Yanru Ge,Yi Jin
To facilitate targeting drug delivery and combined therapy, we develop titanium dioxide-encapsulated Fe 3 O 4 nanoparticles (Fe 3 O 4 @TiO 2 NPs). Titanium dioxide (TiO 2 ), which is employed as a sonosensitizer for sonodynamic therapy (SDT), can also be used for the loading of doxorubicin (DOX). The fabricated Fe 3 O 4 @TiO 2 NPs exhibit pH-dependent loading and release of doxorubicin (DOX) in vitro. After incubation with cancer cells, reactive oxygen species (ROS) are generated efficiently upon the irradiation of ultrasound. In the biodistribution experiments, extremely high in vivo tumor accumulation of Fe 3 O 4 @TiO 2 NPs and long-time retention effect are observed. Compared with chemotherapy or sonodynamic treatment alone, the combined therapy demonstrated a synergistic effect, resulting in stronger cytotoxicity and higher therapeutic efficacy. Thus, the constructed NPs are endowed with multifunctions which allow them to selectively deliver combinatorial therapeutic payload to tumor with enhanced therapeutic effectiveness and minimal side effects.
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PubMed
高影响因子
Catalysts
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2022
·Vol. 12
·期 6
·599
·
IF 4.501
Yong Li,Mingqing Zhang,Yanfang Liu,Qinghua Zhao,Xin Li,Qianyu Zhou,Yuanfu Chen,Shifeng Wang
Research has demonstrated that the formation of composites of titanium dioxide (TiO2) with silver phosphate (Ag3PO4) through the construction of heterojunctions can expand its light absorption range and suppress the recombination of photogenerated electron–hole pairs, thereby improving the photocatalytic performance. However, this method offers only limited performance improvements, and the composite photocatalysts are costly due to the expensive Ag3PO4. In this study, Ti3C2MXene, which has good hydrophilicity and excellent electrical conductivity, is first used to form Schottky junction composites with bronze TiO2(TiO2(B)) via electrostatic self-assembly. Then, Ag3PO4quantum dots were further formed on the surface of the TiO2(B)/Ti3C2MXene by in situ self-growth, and Ag3PO4formed heterojunctions and Schottky junctions with TiO2(B) and Ti3C2MXene, respectively. Finally, a ternary composite photocatalyst TiO2(B)/Ti3C2MXene/Ag3PO4was jointly constructed by these functional junctions. Under the synergistic effect of these functional junctions, the mobility and fast separation performance of photogenerated electron–hole pairs of the composite photocatalyst were significantly improved, the recombination of photogenerated electron–hole pairs was effectively suppressed, and the light absorption performance was enhanced. As a result, the composite photocatalyst exhibited excellent photocatalytic performances.Keywords:ternary composite photocatalyst;heterojunction;photocatalytic degradation;bronze TiO2;Ti3C2MXene
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Jing Zhu,Jingyu Wang,You-Peng Chen,Taiping Qing,Peng Zhang,Bo Feng
With the increasing concerns regarding bacterial adaption to nanomaterials , it is critical to explore the main mechanism behind the adaptive morphogenesis of microorganisms . In this work, the biofilms formed from activated sludge exposed to 5 and 50 mg/L nTiO 2 in the dark had increased biomass and selectively enriched pathogens . To further elaborate adaptive mechanism of biofilm formation induced by nTiO 2 , the protein response and protein phosphorylation modification of Escherichia coli K12 were determined using integrative systems biology analyses of proteomics and phosphoproteomics. Results identified that E. coli cultivated with nTiO 2 considerably upregulated iron acquisition, and regulated protein phosphorylation states associated with of transcription and translation and biofilm formation relative to unexposed controls. Accordingly, bacteria increased siderophores and exopolysaccharide content (increased by about 57% and 231%, respectively), and enhanced resistance to transcriptional inhibitory antibiotics. Moreover, a dose of an iron chelator, i.e., deferoxamine mesylate salt, effectively retarded the biofilm development of bacteria exposed to 50 mg/L nTiO 2 . Overall, this work will provide a new insight for biofouling control, and contribute to an improved understanding of microbial adaption to nanomaterials.
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PubMed
高影响因子
Acta Biomaterialia
·
2021
·
IF 8.947
Jing Cao,Yu Sun,Cong Zhang,Xue Wang,Yiqing Zeng,Tao Zhang,Pintong Huang
Sonodynamic therapy (SDT) represents a viable approach to overcoming the limited ability of photodynamic therapy to penetrate biological barriers. However, pancreatic tumors contain a hypoxic microenvironment that limits the efficacy of oxygen-dependent type II SDT, complicating efforts to develop reliable, stable, and hypoxia-tolerant sonosensitizer. Herein, a tablet-like TiO 2 /C nanocomposite with a metal-organic-framework (MOF)-derived carbon structure was designed and found to be hypoxia-tolerant and stable in response to repeated ultrasound irradiation, enabling the TiO 2 /C-mediated generation of large quantities of reactive oxygen species (ROS) and thereby achieving efficacious type I SDT. Importantly, this nanocomposite continued to generate ROS in response to repeated ultrasound irradiation, and was able to induce tumor cell apoptosis via SDT-induced DNA damage in vitro and in vivo . This TiO 2 /C nanocomposite also exhibited good biocompatibility and did not induce any apparent toxicity in vitro and in vivo . Together, these data highlight TiO 2 /C as a valuable nanocomposite capable of facilitating repeated type I SDT, making it a promising tool for the treatment of hypoxic solid pancreatic tumors. Statement of significance In this research, a tablet-like TiO 2 /C nanocomposite with a metal-organic-framework (MOF)-derived carbon structure was designed, which exhibited great stability upon repeated ultrasound irradiation, hypoxic-tolerant ability and good biocompatibility. After ultrasound irradiation, TiO 2 /C could efficiently generate reactive oxygen species in an oxygen-independent manner, which overcame the limitation of pure TiO 2 nanoparticles . Therefore, it was applied to repeated type I sonodynamic therapy of hypoxic pancreatic tumor.
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PubMed
高影响因子
CHEMPHYSCHEM
·
2015
·Vol. 16
·期 13
·2826-2835
·
IF 3.419
Shiwei Zhou,Yingying Wang,Ming Zhao,Li-Ping Jiang,Jun-Jie Zhu
Graphical Joining the dots: A core–shell–shell CdSeTe@CdS@ZnS quantum-dot-sensitized macroporous TiO 2 plate is built as a photoelectrochemical signal output system, and the film is modified further with biotin–DEVD–peptide, which can be cleaved specifically by caspase-3 and streptavidin-labeled alkaline phosphatase (SA-ALP), to assemble a multisignal-amplified photoelectrochemical platform. A macroporous TiO 2 film (M-TiO 2 ), which was prepared by burning off the polystyrene microsphere (PS) template from a PS/TiO 2 composite film, can provide a large active surface, improve electron-transport performance, and increase the photocurrent. Furthermore, core–shell–shell CdSeTe@CdS@ZnS quantum dots (QDs) were introduced to sensitize the M-TiO 2 film, which can efficiently broaden the absorption spectra range, separate and transfer charge carriers, reduce recombination loss, and improve photovoltaic response, with a sensitization shell of CdS and a passivation shell of ZnS. A multisignal-amplified photoelectrochemical platform was fabricated by further modifying this film with a combination of biotin–DEVD–peptide (Biotin–Gly–Asp–Gly–Asp–Glu–Val–Asp–Gly–Cys) (which is specifically cleaved by caspase-3) and streptavidin-labeled alkaline phosphatase (SA-ALP). Under the enzymatic catalysis of ALP with the substrate 2-phospho- L -ascorbic acid trisodium salt (AAP), ascorbic acid (AA) was generated as a better electron donor, leading to increased photocurrent output. The activity of caspase-3, which depends on the amount of residual peptide on the electrode, was inversely proportional to the amount of AA. By monitoring the variation of photocurrent caused by AA, caspase-3 activity and the therapeutic effect of nilotinib (a special medicine of chronic myeloid leukemia, CML) were indirectly detected and evaluated. The photoelectrochemical platform can be used as a potential evaluation system for monitoring caspase-3 activity and drug effects.
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PubMed
高影响因子
CARBOHYDRATE POLYMERS
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2018
·
IF 5.158
Hui Zhan,Na Peng,Xiaojuan Lei,Yanan Huang,Dong Li,Rongjun Tao,Chunyu Chang
Emulsified oily wastewater threated to human health seriously, and traditional technologies are unable to separate the emulsion for the small size of oil droplets. Membranes with special wettability are considered as an efficient way for oil/water emulsions separation, but challenges remain in terms of high material costs, complex processing, and easy to be fouled. Herein, novel self-cleanable membranes composed of nanocellulose and TiO 2 nanoparticles were developed through a facile and sustainable vacuum-assisted filtration process. TiO 2 nanoparticles in situ generated on the surface of tunicate cellulose nanocrystals (TCNC), a kind of nanocellulose, by hydrolysis of titanium oxysulfate. The prepared nanocomposite membrane showed hierarchical architecture, high roughness, superhydrophilicity and underwater oleophobicity. After UV-light irradiation, the resulting membrane exhibited improved underwater oil contact angles and water fluxes, beneficial for the selective oil/water emulsions separation. Importantly, the TiO 2 /nanocellulose membrane could rapidly degrade contaminant (oleic acid) under UV-light irradiation, suggesting excellent self-cleaning property. This works provided a facile strategy for development of self-cleanable membrane from nanocellulose for oil/water emulsion separation.
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PubMed
高影响因子
Nanoscience and Nanotechnology Letters
·
2018
·Vol. 10
·期 1
·51-59
·
IF 2.917
Guo Min,Yang Lu,Zhang Jun,Su Haijun,Liu Lin,Chen Jia,Fu Nianqing
To achieve highly efficient visible-light photocatalysis, a new composite photocatalyst was designed and constructed for the first time in this study by coupling novel TiO2 nanotube photonic crystals (TiO2 NT PCs) with localized surface plasmon resonance (LSPR)
of gold nanoparticles (Au NPs). Due to the synergistic effect of slow photon and LSPR which originated from TiO2 NT PCs and Au NPs respectively, the photocatalyst could expand the light absorption spectrum, thus enhancing photocatalysis efficiency in the visible light region. Compared
to its bare TiO2 NT and TiO2 NT PC counterparts, the optimized Au NPs/TiO2 NT PC showed superior performances under the visible light irradiation. Moreover, over 65% Rhodamine B was degraded within 3.5 h by the optimized Au NPs/TiO2 NT PC, while
only 15% and 8% Rhodamine B were degraded within the same time by using Au NPs/TiO2 NT and bare TiO2 NT, respectively. We believe that this work will be helpful in designing of PC-coupled plasmonic nanostructure materials for visible-light-driven photocatalysts, as well
as other photoelectronic applications, such as photoelectrochemical water splitting and photovoltaic.
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高影响因子
TEXTILE RESEARCH JOURNAL
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2014
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IF 1.332
Omer Kamal Alebeid,Tao Zhao
A new approach for ultraviolet (UV) protection of cotton fabrics based on TiO2 nano-sol and reactive dye was studied. Cotton fabrics were cationized with different amounts of 3-chloro-2-hydroxypropyl trimethylammonium chloride. TiO2 nano-sol was prepared by the sol-gel method using tetraisopropyl orthotitanate and applied on cationized cotton fabrics with different quantities using the same finishing formulation and treatment sequence. Treated fabrics were then dyed with various concentrations of BH-3RS-Reactive yellow 176. Samples were further tested for UV protection factor, color strength, color fastness to washing, durability and tensile strength. The chemical and morphological structures of the coated fabrics were characterized by attenuated total reflection–Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffractometry. Cationized cotton fabrics treated with TiO2 nano-sol and dyed with reactive dye showed better UV protection with slight reduction in color depth (K/S) and tensile strength.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Guozhen Liu,Xinguang Yuan,Yanmin Yang,Jianming Tao,Yubin Chi,Lixun Hong,Zhiya Lin,Yingbin Lin,Zhigao Huang
Wreath-like Co 3 O 4 particles consisting of microplates are synthesized by a facile solvothermal method and subsequently surface-modified with TiO 2 ultrathin layer using a low-temperature hydrolysis process. Comparing with pure Co 3 O 4 , Co 3 O 4 @TiO 2 exhibits superior electrochemical performances in terms of reversible capacity, rate capability and cycling stability. Co 3 O 4 @TiO 2 exhibits high reversible capacity of 813.0 mAhg −1 at 500 mAg −1 after 180 cycles while the pristine Co 3 O 4 only has a discharge capacity of 512.5 mAhg −1 . The filling of TiO 2 nanoparticles in porous Co 3 O 4 sheets and the TiO 2 -coating on Co 3 O 4 surface, could effectively suppress large volume expansion of Co 3 O 4 and consequently enhance structural stability during the Li-ion insertion/extraction processes. Analysis from the electrochemical measurements reveals that the improved performances should be attributed to reduced the charge-transfer resistance and enhanced Li-ion diffusion kinetics because of TiO 2 -coating. In addition, the reduced work function induced by TiO 2 -coating is helpful to facilitate electron transfer in composites. Moreover, the built-in electric field resulting from the difference in work function between Co 3 O 4 and TiO 2 , would facilitate electron-transfer and Li-ion migration across heterojunction interfaces.
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高影响因子
MATERIALS SCIENCE FORUM
·
2016
·
IF 0
Ting Xi Li,Hai Bo Su,Li Gao,Lin Jiang,Cheng Xiang Zhang,Yong Qin Han,Yanmin Wang,Qing Wang
Improving the mechanical properties and ultraviolet resistant properties of epoxy resin (EP) is attracting the scientists’ increasing interest in engineering industries at present. For this reason, novel Vi-POSS-TiO2/EPnanocomposites were prepared by incorporating nanotitanium dioxide (TiO2) and PSS-Octavinyl substituted (Vi-POSS) organic-inorganic hybridparticles into the epoxy resin. Filling up with TiO2 and Vi-POSS may create an inherent ultraviolet (UV) absorption property and mechanical property, respectively. The obtained composites were characterized by some standard analytical techniques such as UV-vis spectroscopy, Scanning electron microscope (SEM), and Thermal gravity analysis (TGA). When the content of TiO2was 1.5wt%, UV-vis absorption spectra showed that the excellent absorption properties of EP composites can be achieved. When the content of Vi-POSS was 6wt%, the values of bend strength and impact strength were improved 14.75%and37.94%, respectively. The TGA result showed that the thermal stability of EP composites varied in a small range before and after adding 6wt% Vi-POSS.
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