JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 7
·4445-4456
·
IF 1.354
Liu Min-Chao,Liu Bing,Sun Xiang-Yu,Lin Hui-Chao,Lu Jia-Zheng,Jin Shu-Fang,Yan Si-Qi,Li Yan-Yu,Zhao Ping
The dose-dependent toxicity and low specificity against cancerous cells have restricted the clinical use of daunomycin (DNM). Titanium dioxide (TiO2) has been wildly used as an inorganic photodynamic therapy (PDT) agent and drug carrier. To facilitate the targeted drug delivery
and combined therapy, in the present study, TiO2-coated Fe3O4 nanoparticles (Fe3O4@TiO2 NPs) were employed to load DNM and the drug-loaded Fe3O4@TiO2-DNM Nps exhibited smart pH-controlled releasing
and satisfactory cytotoxicity as well as photocytotocity. The combination of prussian blue staining and fluorescence methods evidenced the effortless cell internalization of the fabricated Fe3O4@TiO2-DNM Nps for the cancer cells. The cell cycle status experiments
indicated that the as-prepared nanospheres arrested the S and G2/M periods of the cancer cell proliferation in the dark, and further induced the apoptosis under the irradiation of ultraviolet light. The cell apoptotic results revealed that the apoptosis induced by the Fe3O4@TiO2-DNM
Nps was in the early stage. The constructed Fe3O4@TiO2-DNM NPs have been endowed with multifunctions that allow them to selectively deliver combinatorial therapeutic payload and exhibit integrated therapeutic effectiveness to tumors.
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DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 19
·3403
·
IF 5.719
Dandan Yan,Zhi Yu,Tingting Zou,Yucai Lin,Wenchi Kong,Jianjun Yang
The acquiring of superhydrophilic surfaces attracts the strong interest in self-cleaning, anti-fogging and anti-icing fields based on the unique features. However, the persistent time of superhydrophilic surfaces is still facing a big challenge because of easily adsorbing hydrophobic groups. Here, we propose a strategy to achieve a superhydrophilicity persisting for an unprecedently long time on sapphire surfaces, by compounding the femtosecond laser-induced hierarchical structures and the subsequent varnish of TiO2. The superhydrophilic effect (with a contact angle of CA = 0°) created by our method can be well prolonged to at least 180 days, even for its storage in air without additional illumination of UV lights. Based on comprehensive investigations, we attribute the underlying mechanisms to the coordination of laser-induced metal ions on the material surface via TiO2doping, which not only prevents the adsorption of the nonpolar hydrocarbon groups, but also modulates the photo-response properties of TiO2. In addition, further experiments demonstrate the excellent anti-fogging properties of our prepared samples. This investigation provides a new perspective for further enhancing the durability of superhydrophilicity surfaces.Keywords:femtosecond laser;long-time superhydrophilicity;sapphire;TiO2
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yifang Mi,Na Wang,Xingyu Fang,Jia Cao,Meng Tao,Zhihai Cao
Integration photocatalysis with membrane technology offers a potential solution to combat fouling dilemma. Herein, an interfacial polymerization polyamide nanofiltration (NF) membrane with self-cleaning ability was prepared by incorporation of carbon quantum dots /titanium dioxide (CQD/TiO 2 ) nanoparticles (NPs). The addition of hydrophilic CQD/TiO 2 NPs promoted membrane hydrophilicity and endowed the NF membrane with high water flux (67.22 L m −2 h −1 ), which was 1.8 times compared with that of the pristine membrane, and salt rejection of Na 2 SO 4 (96.7%). Simultaneously, the prepared NF membranes maintained high dye rejection to methyl blue (MYB, 99.1%) and congo red (99.8%). Moreover, visible light-driven photocatalytic ability of CQD/TiO 2 allowed the membranes to efficiently degrade MYB dyes absorbed on the membrane surface. In stark contrast to the results of cyclic physical water cleaning, the flux recovery ratios were maintained 97–98% without sacrificing MYB rejections during the cyclic fouling-irradiation process, demonstrating stable and efficient self-cleaning performance. Even after continuous membrane fouling for 72 h, the water flux only decreased by 6.7% after visible light irradiation, surpassing the performance of pristine polyamide NF membrane (decreased by 23.4%). The hydrophilicity and visible light-driven self-cleaning ability make the prepared NF membrane via interfacial polymerization highly suitable for efficient dye wastewater treatment.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
·
IF 6.146
Junxiong Guo,Yiyi Li,Shangdong Li,Xumei Cui,Yu Liu,Wen Huang,Linna Mao,Xiongbang Wei,Xiaosheng Zhang
We synthesized a mesoporous film based on TiO 2 –reduced graphene oxide (RGO) hybrids using a one-step vapor-thermal method without the need for an additional annealing process. The vapor-thermally prepared TiO 2 -graphene hybrid (VTH) features unique structures with an ultra-large specific surface area of ˜260 m 2 g −1 and low aggregation, giving rise to enhanced light harvesting and increased charge generation and separation efficiency. It was observed that a mesoporous film with uniform pore distribution is simultaneously obtained during the VTH growth process. When a 5.0 wt% RGO VTH film was used as the active layer in photocatalysis , the highest photocatalytic activity for degradation of methyl orange was achieved. For another, when a 0.75 wt% RGO VTH film was used as the photoanode in a dye-sensitized solar cell, the power conversion efficiency reached 7.58%, which represents an increase of 73.1% compared to a solar cell using an a photoanode of pure TiO 2 synthesized by a traditional solvothermal method. It is expected that this facile method for the synthesis of TiO 2 /graphene hybrid mesoporous films will be useful in practical applications for preparing other metal oxide/graphene hybrids with ultra-high photocatalytic activity and photovoltaic performance.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Guang Gao,Zelun Zhao,Jia Wang,Yongjie Xi,Peng Sun,Fuwei Li
ABSTRACT Engineering the surface microenvironment by tuning the binary interactions between a supported metal with a secondary metal oxide (MO x ) or support has been a common method for improving the catalytic performance of supported metal catalysts. However, few studies have investigated the ternary interactions among the metal, MO x , and support. Here, we report for the first time the formation of metal-MO x -support interaction (MMSI) in reducible TiO 2 -supported PtReO x catalysts, affording 87% yield and 100% ee in the tandem hydrogenation of an aqueous chiral cyclohexane-1,2-dicarboxylic acid into the corresponding diol; the catalytic activity is eight times higher than that obtained with non-reducible support counterparts in the same reaction via traditional batch synthesis with multiple steps and unfriendly reagents. Detailed experimental and computational studies suggest that the TiO 2 crystalline phase-dependent density of the oxygen vacancies induces different Pt-ReO x -TiO 2 interactions, which dominate the electron transfer therein and tune the adsorption strength of the carbonyl moiety of the substrate/intermediate, thus promoting the hydrogenation activity and selectivity. In addition, the strong MMSI endows the optimal rutile TiO 2 supported PtReO x catalyst with an outstanding lifetime of 400 h in a fixed-bed reactor under acidic aqueous conditions and ensures efficient applications in the selective hydrogenation of aliphatic dicarboxylic acids and functional carboxylic acids. This work provides a promising strategy for the development of efficient and stable supported catalysts for the selective hydrogenation of diverse C–O and C=O bonds.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Limin Guo,Runze Hu,Caifu Zhong,Xinxin Wang,Jiaming Liu,Xiaohui Wang
An elegant templating method has been developed for the rational design and synthesis of hierarchical SnS 2 nanoclusters composed of ultrathin nanosheets and embedded inside TiO 2 nanoporous arrays. Herein, benefiting from their unique structural merits and metal-like plasmonic activity, the TiO 2 @SnS 2 heterostructures exhibit enhanced photocatalytic H 2 evolution properties in terms of good cycling performance. S vacancies and N-doping are proved to be vitally important to the electronic structures and bandgap of SnS 2 , thus influence the plasmonic property and separation of photo-carriers. The optimized TiO 2 @6nmSnS 2 /N nanoporous arrays give an ultra-high H 2 yield rate of 285 μmol h −1 cm −2 under a low catalyst loading mass, that comparable to most noble metal catalysts . Remarkable cycling performance with a capability retention of 90% is achieved after 30 h under solar light illumination. As an innovative exploration, this study demonstrates that the photocatalytic activities of nonmetal, earth-abundant SnS 2 can be enhanced with plasmonic effect, which may serve as an excellent catalytic agent for solar energy conversion to chemical fuel.
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高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Zhaoying Guo,Qi Wang,Tao Shen,Xianjie Hou,Jianlei Kuang,Wenxiu Liu,Wenbin Cao
A novel CQDs/TiO 2 hierarchical structure with enhanced photocatalytic properties was achieved by uniformly decorating urchin-like and yolk-shell TiO 2 microspheres (UYTMs) with carbon quantum dots (CQDs) through an environmentally friendly hydrothermal process. The CQDs were firstly synthesized by the electrochemical method, and the TEM, Raman and PL characterizations strongly indicated that the as-prepared CQDs exhibited good dispersion, high crystallinity and unique up-conversion properties. The UYTMs synthesized by a NaOH-assisted hydrothermal process showed stable 3D hierarchical structure and large surface area, which was beneficial for light absorption and contacting with contamination. The good combination of CQDs and UYTMs was further successfully achieved during the hydrothermal process, and demonstrated by a series of tests. The photocatalytic experiments suggested that the CQDs/UYTMs exhibited better photocatalytic activities than the pure UYTMs and P25 under both visible and UV light irradiation. The CQDs/UYTMs combining with 6 wt% of CQDs showed the best photocatalytic efficiency, while excessive CQDs tended to inhibit the photocatalytic activity. According to the results and discussions, a possible mechanism in improving the photocatalytic efficiency of the CQDs/UYTMs is significantly proposed. The up-conversion property of CQDs can broaden the absorption spectrum of CQDs/UYTMs to the visible light. Moreover, the CQDs, as the electron reservoirs, are efficient to separate the electrons and holes, leading to an improved photocatalytic activity of CQDs/UYTMs.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yaoyao Zhu,Yeqiang Lu,Hang Yu,Guojun Jiang,Xueting Zhao,Congjie Gao,Lixin Xue
Super-hydrophobic F-TiO 2 @PP membranes were developed from polypropylene (PP) non-woven fabric by in situ cross-linking polymerization of trifluorofluorooctyl methacrylate (FOMA) and sol–gel-derived titanium dioxide with vinyltriethoxysilane (VTES). Due to the formation of super-hydrophobic “coral”-like synapses on the filamentous surfaces of PP non-woven fabric, F-TiO 2 @PP membranes showed extremely high water contact angles up to 157° and capability of rapidly absorbing oil drops. The F-TiO 2 @PP membranes were also able to expel water from water-in-oil emulsions with robustly high oil permeate fluxes (up to 11,000 L m −2 h −1 under gravity), water removing efficiency (up to 99.7%), re-usability and long-term stability even at the presence of surfactant and salts. Such superior performance could lead to potential applications in rapid collection and efficient purification of recovered oily organic components from waste liquids or accidental oil discharges in marine or continental situations.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ying Xu,Zhiwen He,Shuili Yu,Lei Li,Luyang Cai,Peng Yi
Recently, the heterogeneous advanced reduction processes (ARPs) for bromate (BrO 3 - ) degradation have attracted considerable attention due to its stable performance and easy combination with UV disinfection. In this study, a UV/TiO 2 -Bi advanced reduction process (ARP) was established for BrO 3 - removal without adding external sacrificial agents. In the UV/TiO 2 -Bi ARP, Bi nanoparticles (NPs) doped on the TiO 2 acted as hole trapping centers, while TiO 2 NPs were used as reduction centers for the reduction of BrO 3 - , which enhanced the charge carrier separation. The UV/TiO 2 -Bi-1% ARP exhibited the highest BrO 3 - removal rate without the addition of sacrificial agents in the reaction solution compared to UV/TiO 2 ARP and the UV/TiO 2 -Bi ARP at other Bi/Ti ratios. The result of 72% removal of 200 µg/L BrO 3 - at 60 min by 0.2 g/L TiO 2 -Bi-1% in tap water at pH 6.8 and 7.71 mg/L dissolved oxygen (DO) demonstrates the promising potential of the UV/TiO 2 -Bi ARP for the removal of BrO 3 - in practical applications. Compared to the 99.5% removal in deionized (DI) water at 60 min, lower BrO 3 - reduction in tap water was likely attributed to the consumption of photo-generated electrons by NO 3 – and the adsorption of natural organic matter on the surface of TiO 2 -Bi-1% nanocomposites. The study provides not only a novel BrO 3 - removal system with good photo-reduction performance, but also some guidance for the influence of constituents in raw water on the treatment of BrO 3 - .
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Geshan Zhang,Hanrui Wu,Hangdi Yu,Xiali Zheng,Tian Yuan,Xiaoqiang Jin,Yifan Zheng,Zongjian Liu
Mo 2 N decorated TiO 2 nanowires were obtained via impregnating titanate nanowires with a mixture of (NH 4 ) 6 Mo 7 O 24 and hexamethylenetetramine , followed by the calcination at 600–800 o C in N 2 atmosphere. The results show that only Mo 6+ species can be found in the sample calcined at 600 o C while Mo element is still dominantly in the form of Mo 6+ with a negligible amount of γ-Mo 2 N (namely Mo δ+ , 0 < δ < 4) and Mo 4+ at 700 o C. In the sample calcined at 800 o C, however, ultrasmall γ-Mo 2 N nanocrystals with an average size of about 3.3 nm can be observed on the surface of TiO 2 nanowires. The photocatalytic activity test reveals that, although the γ-Mo 2 N-absent sample obtained at 800 o C is dominantly in the form of inert rutile TiO 2 , the introduction of γ-Mo 2 N nanocrystals can significantly improve its performance to be more than doubled in methyl orange (MO) removal percentage, increasing from 36.5% to 75.5% after 2h irradiation (high-pressure mercury lamp), due to the formation of heterojunction between γ-Mo 2 N and TiO 2 nanowires. Furthermore, 5% γ-Mo 2 N decorated TiO 2 exhibit better photocatalytic activity due to its higher surface area and more heterojunctions between γ-Mo 2 N and TiO 2 . This γ-Mo 2 N decorated TiO 2 photocatalyst can broaden the practical scope of rutile TiO 2 and have a promising potential in photocatalytic application.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Xiaojie Song,Xiufang Wang,Weiwei Dong,Qishu Qu,Haichen Wang,Fan Yang
Solar-to-chemical energy conversion via heterogeneous photocatalysis is one of the effective approaches to tackle the growing environmental and energy challenges. Homogeneously dispersed silver nanoparticles (Ag NPs) and cadmium sulfide nanoparticles (CdS NPs) with average particle size not>20 nm were fabricated on the surface of titanium dioxide nanotubes (TNTs) (Ag/CdS/TNTs) with the help of sodium dodecyl benzene sulfonate (SDBS). Herein, more surface active sites are created on the surface of nanocomposites. The experimental results demonstrate that the photocurrent intensity of the nanocomposites obviously increased, which effectively improves the photocatalytic activity. The results of photocatalytic experiments indicated that using triethanolamine (TEOA) and acetonitrile (MeCN) as sacrificial agents, the nanocomposites afford the CO yield from CO 2 (1455.6 μmol‧g −1 ‧h −1 ). Besides, Ag/CdS/TNTs nanocomposites displayed the H 2 evolution rate of 3700.57 μmol‧g −1 ‧h −1 , which was twice as much as pure TiO 2 NPs. The increase in the photocatalytic ability of the nanocomposites is basically attributed to the three materials formation S-scheme heterojunction which reduce the recombination probability of the photo-induced electrons and holes and thus enhances the photocatalytic activitys. Ultimately, a photocatalytic reaction mechanism is proposed for Ag/CdS/TNTs nanocomposites in the reduction of CO 2 .
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Weilin Zhong,Chao Wang,Bo Jiang,Suqing Peng,Hailun Zhao,Riyang Shu,Zhipeng Tian,Yanping Du,Ying Chen
Combining solar energy utilization and hydrogen production is an ideal model for renewable energy development. Especially the conversion of broad-spectrum solar energy into chemical energy of hydrogen and thermal energy can enrich solar energy storage methods. Herein, novel multifunctional Au/TiO 2 @n-octadecane microcapsules with core-shell structure were design and synthesized by wet chemical reduction and electrostatic adsorption self-assembly methods for photothermal hydrogen production and thermal storage . The results showed that microencapsulation of photothermal catalysts could provide an effective reaction area and excellent dispersion stability , where hydrogen production and light to hydrogen efficiency were increased in the 43% and 0.3% respectively, compared to the nanoparticle suspension system. Based on the recorded temperature variations caused by the photothermal effect, the calculated photothermal conversion efficiency and specific absorption rate of Au/TiO 2 @n-octadecane was 25.01% and 277% higher than that of Au/TiO 2 suspension. The proposed hydrogen production and thermal storage method via multifunctional microcapsules might shed some light on the study of improving full-spectrum energy conversion efficiency of solar energy.
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高影响因子
危险品化学品经营许可证（带存储）