Journal of Energy Storage
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2024
·
IF 8.9
Min Sun,Zhijun Liang,Rui Zhang,Kai Zhang,Kai kai Ba,Yanhong Lin,Dejun Wang,Tengfeng Xie,Yu Zhang
Recently, constructing heterostructures at the working electrode has emerged as a promising technique in energy storage. This approach utilizes the interfacial energy level difference between two semiconductors to enhance charge transfer and improve Li + diffusion kinetics. In this work, we employed an in-situ hydrothermal method to successfully fabricate TiO 2 /MoO 3 heterostructured electrodes. The resulting interface driving force of approximately 0.54 V exhibited a significant enhancement in charge transfer and demonstrated superior Li + storage performance compared to individual MoO 3 electrodes. Additionally, the incorporation of TiO 2 effectively reduced volume expansion, enhancing the stability of the electrode material. As expected, the heterostructure electrode TiO 2 /MoO 3 (x = 10) exhibits the highest specific capacitance of 606.36 F·g −1 . Our further fabricated asymmetric supercapacitor TiO 2 /MoO 3 (x = 10)//PPy device presents an energy density of 42.28 Wh·kg −1 , which is 1.57-fold higher than that of the MoO 3 //PPy device. This study introduces a methodology that enhances the efficiency and accessibility in the process of creating electrode materials, thereby offering a more streamlined and user-friendly avenue for the advancement of supercapacitor.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Jianfeng Lan,Xianhui Zhang,Jiangfan Chang,Bo Wu,Baiyi Chen,Jianhua Wu
Titanium, often referred as the “metal of the ocean”, shows substantial promise for marine engineering applications. However, its widespread use remains constrained by the persistent challenge of biofouling in the marine environment, underscoring the critical need for effective anti-fouling strategies tailored for titanium. This paper develops a novel anti-fouling titanium surface, prepared through a straightforward two-step electrochemical method that completely fills the anti-fouling agent Cu 2 O into TiO 2 nanotube arrays on the titanium surface. The method achieves the complete filling of Cu 2 O into TiO 2 nanotube arrays by selectively enhancing the bottom conductivity of TiO 2 nanotube arrays and the optimized pulse deposition parameters. Anti-fouling performance evaluations demonstrate that this novel anti-fouling titanium surface exhibits excellent anti-adhesion properties against marine fouling organisms, including bacteria, diatoms, and barnacles. Furthermore, it maintains significant anti-fouling efficacy for nearly one month in the marine environment. The design and fabrication process of this novel anti-fouling titanium surface proposed in this paper provides a promising strategy for the application of titanium in the marine environment.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xiaoyan Ma,Huiting Wang,Yaxian Chen,Longfei Fu,Jie Zhou,Ling Zhang,Zhiqiang Xing,Qian Zhang,Lixin Xia
Utilizing hydrothermal synthesis, TiO 2 and g-C 3 N 4 were grown on cotton fabric. Subsequently, Ag NPs were uniformly deposited on their surfaces to produce a Ag@g-C 3 N 4 /TiO 2 cotton fabric substrate (AGTC) with dual-functionalilites of photocatalytic reusability and SERS signal amplification. The introduction of TiO 2 and g-C 3 N 4 nanocomposites significantly enhances the SERS signal on the AGTC substrate for malachite green (MG) detection. The SERS signal on the AGTC substrate is 2.28 times stronger than that on the bare silver-modified cotton fabric, with a reduced detection limit of 6.74 × 10 −13 M. Additionally, the Local Surface Plasmon Resonance (LSPR) effect induced by Ag NPs facilitates electron transfer among substrate components, markedly enhancing photocatalytic capability for degrading organic pollutants under visible light. Consequently, under visible light, the substrate rapidly degrades pollutants and reverts to a reusable state. Experimental results demonstrate the substrate's capability to continuously detect various concentrations and types of target substances, while maintaining high sensitivity. Leveraging the flexibility of cotton fabric, convenient wipe detection and self-cleaning experiments were conducted on the surfaces of different fish species, validating AGTC's outstanding sensitivity in real sample analysis. Therefore, as a flexible and reusable SERS substrate, AGTC exhibits broad potential applications in both SERS detection and photocatalytic degradation of pollutants.
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RSC Advances
·
2016
·Vol. 6
·期 56
·50506-50512
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IF 3.289
Kaifu Zhang,Wei Zhou,Xiangcheng Zhang,Yang Qu,Lei Wang,Weiyao Hu,Kai Pan,Mingxia Li,Ying Xie,Baojiang Jiang,Guohui Tian
Stable mesoporous black anatase TiO2 nanosheets (MBTNs) are synthesized via an earth-abundant low-cost biotemplate method combined with an ethanediamine encircling process, and subsequent high-temperature calcinations and surface hydrogenation. The MBTNs, which can be synthesized on a large scale with a low cost, are composed of Ti3+ in frameworks and surface disorders. In this case, the employment of ethanediamine encircling plays a vital role in fabricating the stable MBTNs, and not only favors high-temperature hydrogenation (600 °C), but also retains the mesoporous network as well as inhibiting the anatase-to-rutile phase transformation and grain growth. The resultant MBTNs possess a relatively high surface area of ∼74 m2 g−1, and large pore size and pore volume of ∼10 nm and 0.15 cm3 g−1, respectively. The MBTNs, with a narrow bandgap of ∼2.85 eV, can extend the photoresponse from the ultraviolet to visible light region, and exhibit an excellent solar-driven photocatalytic hydrogen evolution rate (∼165 μmol h−1 0.05 g−1), which is about twice as high as that of pristine mesoporous TiO2 nanosheets (∼82 μmol h−1 0.05 g−1). This efficient solar-driven photocatalytic hydrogen evolution is ascribed to the synergistic effects of the highly crystalline, ultrathin 2D mesoporous structure of Ti3+ in frameworks and surface disorders.
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CHEMISTRY OF MATERIALS
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2016
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IF 9.407
Jun Shao,Songwang Yang,Lei Lei,Qipeng Cao,Yu Yu,Yan Liu
Pore size and porosity of the porous materials play an important role in catalysis, dye-sensitized solar cells and mesoscopic perovskite solar cells (PSC), etc. Increasing pore size and porosity of mesoporous TiO2 is crucial for facilitating pore-filling of perovskite, charge extraction on TiO2/CH3NH3PbI3 interface and thus cell performance enhancement. Highly porous TiO2 films (TFs) with a large pore size that extends the limit of particle size have been achieved through a novel TiO2 paste using copolymer P123 as a pore-adjusting agent and 2-butoxyethyl acetate as a solvent. A highly porous structure with the pore size of 34.2 nm and porosity of 73.5% has been obtained, the porosity of which is the largest that has ever been reported in the screen-printed TiO2 thick films. The pore size and porosity of TFs can be successively adjusted in a certain range by tuning the P123 content in the pastes. As particle size and surface area of TFs are kept almost constant, the specific investigation on the effect of varied pore size on the performance of bilayer-structured PSCs becomes possible. The hysteresis phenomenon, the notorious problem of PSCs, is found to depend greatly on pore size and porosity of TFs, that is, pore-filling of perovskite. The suppressing effect of highly porous TFs on hysteresis by avoiding charges accumulation on the interface due to enhanced interfacial contact is proved by the invariable photocurrent response after prebias treatment. A hysteresis-free solar cell with an efficiency of 15.47% was achieved by depositing a 242 nm-thick perovskite capping layer upon 350 nm-thick TF with a pore size of 34.2 nm. This method developed for the preparation of highly porous TFs provides a new way to fabricate hysteresis-free PSCs and is widely applicable for the fabrication of other mesoporous metal oxide films with large pore sizes.
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QUIMICA NOVA
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2016
·Vol. 39
·期 8
·956-961
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IF 0.617
Zhang Xiuli,Yin Yidong,Sun Zhibo,Du Yingqiu,Ma Shichao,Wu Yan
Chromium and sulfur co-doped nanometer TiO2 hollow glass microspheres (Cr/S/TiO2-HGM) were synthesized by a sol-gel method. Characterization used X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), N2 adsorption-desorption (Brunauer-Emmett-Teller (BET) measurements) and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity was evaluated by photodegradation of indigo carmine in an aqueous solution under visible light irradiation. The results indicated that the Cr/S/TiO2 containing 0.60% (atomic ratio) chromium and 1.2% (atomic ratio) sulfur calcined at 500 ºC for 2 h had high catalytic efficiency under visible light irradiation. The floating Cr/S/TiO2-HGM catalyst had greater photocatalytic activity than Cr/S/TiO2 powder. Therefore, Cr/S/TiO2-HGM is a promising, high-performing, visible-light-driven, and more reusable photocatalyst.
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Journal of Environmental Sciences
·
2017
·
IF 2.865
Fangzhou Li,Jiangshan Zhou,Chun Du,Wei Li,Yinzhen Wang,Guannan He,Qinyu He
A one-step microwave irradiation method was used to deposit carbon and nitrogen co-doped TiO 2 ((C, N)-TiO 2 ) on commercial brick ((C, N)-TiO 2 /brick). The as-prepared samples were characterized by X-ray diffraction, ultraviolet–visible (UV–vis) diffuse reflectance spectroscopy, photoluminescence spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy (SEM). A selective technique was also used to investigate the concentration of hydroxyl radicals during UV–vis irradiation of the Methyl Orange solution with the as-prepared samples. The C and N dopants enhanced visible light absorption and provided a longer lifetime for the photo-generated electron–hole pairs. The SEM images showed that the as-prepared sample is porous. The dark adsorption and photodegradation test for (C, N)-TiO 2 /brick showed good photodegradation and good recyclability . The best photodegradation rate was 94% after 2 hr. The maximum degradation rate was maintained even after the 6th cycle. The good photocatalytic properties are attributed to the enhanced visible light absorption , enhanced pollutant adsorption arising from the porous structure of the (C, N)-TiO 2 thin film , and longer lifetime of the photo-generated electron–hole pairs. (C, N)-TiO 2 /brick should have potential commercial applications in photodegradation processes because of its low cost, good photodegradation, and excellent recyclability .
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PubMed
高影响因子
Journal of Nanomaterials
·
2015
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IF 1.644
Sufeng Wang,Fengjing Lv,Tifeng Jiao,Jingfen Ao,Xiaochun Zhang,Fengdan Jin
Artemia egg shells have an asymptotic sized pore structure (pore diameter: 500 nm–2500 nm), which could be used as a porous carrier for the preparation of nanocomposite materials. The objective of the present study was to prepare shell-supported TiO2 using a naturally porous carrier, Artemia egg shell, and to exhibit a case study of shell-supported TiO2 for formaldehyde removal. Characterization of shell-TiO2 using SEM-EDS, TEM, and XRD proved that Artemia shell with asymptotic reduction pores (pore diameter: 500 nm–2500 nm) can be used as the carrier for nanocomposite materials. Artemia egg shell-supported TiO2 in polycrystalline-like nanostructures can be used for the high efficiency removal (adsorption and degradation) of formaldehyde under visible light. Our results suggest that iron, one of the shell’s components, should broaden the absorption of visible light and enhance the photocatalytic efficiency of nanotitanium dioxide under visible light. Due to their interesting absorption and formaldehyde removal qualities, Artemia egg shell, as a novel naturally porous carrier for nanocomposite materials preparation, especially in the preparation of nanocatalysts, is worthy of further study.
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FIBERS AND POLYMERS
·
2013
·Vol. 14
·期 11
·1794-1802
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IF 0.912
Li Hui,Fu Shiyu,Peng Lincai
Depositing of TiO 2 nanoparticles on cellulose fiber surface has potential technological applications in the field of photocatalysis. With this motivation, multilayers composed of lignosulfonates (LS) and TiO 2 nanoparticles were constructed on cellulose fiber surface via layer-by-layer (LBL) self-assembly technique. X-ray photoelectron spectroscopy (XPS), zeta potential measurement and atomic force microscopy (AFM) were used to characterize the LS/TiO 2 multilayers on cellulose fiber surface. Moreover, the photocatalytic activities of modified cellulose fibers (decomposition of methyl orange and antibacterial test) were investigated. The decomposition efficiency of methyl orange for a (LS/TiO 2 ) 5 multilayer modified cellulose fibers was 74.7 % under 5 h UV irradiation. Photocatalytic decomposition efficiency of methyl orange by LS/TiO 2 multilayer modified cellulose fibers under the same UV irradiation time increased linearly with the number of bilayers. Antibacterial tests results revealed that the cellulose fibers modified with LS/TiO 2 multilayers exhibited excellent antibacterial activity against E.coil . The degree of E.coil growth inhibition for a (LS/TiO 2 ) 5 multilayer modified cellulose fiber reached as high as 93 %. In addition, the effect of LS/TiO 2 multilayers on properties of handsheets made from modified cellulose fibers was also considered. The air permeability of the handsheet prepared from fibers modified with TiO 2 /LS multilayers had 6.1–24.3 % higher compared with that of handsheet prepared from original fibers. The wetting properties measurement results demonstrated that the water contact angle of handsheet oscillated with the increasing number of layers depended on building block which was in the outermost layer.
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APPLIED PHYSICS LETTERS
·
2013
·Vol. 102
·期 14
·
IF 3.794
Wang Juangang,Shang Yunli
In the present work, we describe a practical technique to construct double-layer organized mesoporous TiO 2 films with a combined thickness of 0.85 μ m. Large mesopores (25.74 nm) formed in the film by using ovalbumin as the main template facilitate entry and adsorption of dye molecules. The films were sensitized by a dye that exhibits a high molar extinction coefficient because it contains a ligand with a fused-ring system. The double-layer films exhibited a solar conversion efficiency of 7.37%, which was about 35% higher than that of monolayer films.
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RSC Advances
·
2014
·Vol. 4
·期 69
·36708-36712
·
IF 3.708
Lei Zeng,Wulin Song,Changsheng Xie
Here, we report a special rod in tube nanostructured TiO2 prepared by a moderate esterification reaction. The morphology evolution with reaction time was observed by FSEM and FETEM. Comparing to the as-reported sphere in sphere nanostructured TiO2, the formation of a rod in tube nanostructure was attributed to the use of a solid precursor. The nucleation-dissolution-anisotropic grain growth-recrystallization mechanism is responsible for the formation of the rod in tube nanostructure. Moreover, the photocatalytic properties of different morphologies of samples were also compared, indicating that the rod in tube nanostructured TiO2 possessed the best photocatalytic activity. The improvement of photocatalytic activity is mainly attributed to the enhancement of light-harvesting and the separation of electron–hole pairs. Finally, the present work also provided a template-free method to synthesize hierarchical porous TiO2 nanotube through prolonging reaction duration.
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ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Hong Tao,Wanping Chen,Jing Wang,Weijun Ke,Jiawei Wan,Jionghua Wu,Guo-jia Fang
Size controllable anatase TiO 2 microspheres with compact nano-aggregate structures are synthesized via a facile and low-temperature solvothermal treatment. The diameters of as-prepared products can be controlled to vary from 250 to 1100 nm. Different kinds of TiO 2 microsphere films are built on the top of TiO 2 nanoparticle underlayer to prepare a type of bi-layer anodes. It is illustrated that this type of TiO 2 microsphere scattering layer can not only increase the absorption of light, but also improve the carrier transport and charge collection efficiency of dye sensitized solar cell (DSSC). Therefore, an optimized efficiency of 8.20% is achieved for DSSC with a scattering layer consisted of 500 nm TiO 2 microspheres. Then we further optimize the interface of TiO 2 microsphere scattering layer through TiCl 4 treatment and Mg 2+ modified TiCl 4 treatment. TiCl 4 treatment can improve the dye adsorption and connections between the TiO 2 microspheres. However, it also generates more surface defects in the meantime. And through the Mg 2+ modified TiCl 4 treatment, we can increase the dye adsorption density and retard the interfacial charge recombination and decrease the surface defects, simultaneously. As a result, the efficiency of DSSC based on bi-layer anode is enhanced from 8.20% to 9.12%.
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