INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yanyan Wang,Xin Ding,Ping Zhang,Qi Wang,Kang Zheng,Lin Chen,Jianjun Ding,Xingyou Tian,Xian Zhang
In this work, a TiO2/g-C3N4 photocatalytic coating is built on cotton fabrics with a simple layer-by-layer (LBL) self-assembly strategy in which TiO2 and g-C3N4 are alternately assembled on cotton fabrics via electrostatic attraction. The fabrics, as support, disperse TiO2/g-C3N4 powder photocatalyst to expose more active sites. The fabrics also act as an adsorbent to boost the pollutants capture. Consequently, the coated fabrics exhibit an outstanding photocatalytic property applicable for degradation of both liquid rhodamine (RhB) and gaseous toluene pollutants. The fabric with seven bilayer coatings shows the best for RhB decomposition with degradation rate of 92.5%. Over 90% toluene could be eliminated by the photocatalytic coating under simulated sunlight irradiation. Besides, the coating fabrics show excellent stability and reusability.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Gang Yang,Rongrong Deng,Yincheng Chang,Hongbo Li
Developing titanium-based dental implants with both excellent antibacterial properties and good osseointegration is crucial for the success of the implant operation and the long-term durability of the implant. In this study, a polydopamine-based coating was created by attaching TiO 2 nanosheets-cyanine composites onto the titanium surface, enabling the integration of effective photothermal antibacterial therapy with osseointegration. The exceptional dual-photothermal conversion abilities of polydopamine and cyanine in the coating resulted in outstanding photothermal antibacterial and antibiofilm therapy against four types of bacteria. Furthermore, TiO 2 nanosheets promoted the adhesion, proliferation and early osteogenic differentiation of osteoblasts. In an infected dental implant model in rats, the developed coating exhibited potent antibacterial activity and remarkable osteogenic differentiation in the bone, leading to increased bone formation around the implants. This innovative approach, combining photothermal therapy with osteogenic two-dimensional nanomaterials, presents a novel method for surface functionalization of implants to achieve effective antibacterial and osseointegration capabilities.
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Kai Wei,Kexin Li,Liushui Yan,Shenglian Luo,Huiqin Guo,Yuhua Dai,Xubiao Luo
In this paper, graphitic carbon nitride nanosheets/titanium dioxide hollow microspheres heterojunctions (g-C 3 N 4 NSs/TiO 2 HMSs) with excellent photocatalytic activity were successfully fabricated by a simple one-step synthesis strategy in the assistance of hydrothermal carbon microspheres. Hydrothermal carbon microspheres act as both dispersant and structure-directing agent for the simultaneous construction of graphitic carbon nitride nanosheets and titanium dioxide hollow microspheres. The synergistic photocatalytic effects in the 4-fluorophenol/hexavalent chromium [4-FP/Cr(VI)] and hexavalent chromium/trivalent arsenic [Cr(VI)/As(III)] multi-component composite pollution systems were studied by using as-prepared g-C 3 N 4 NSs/TiO 2 HMSs under different pH conditions. Interestingly, the efficiencies of 4-FP degradation, Cr(VI) reduction, and As(III) oxidation were simultaneously improved in the 4-FP/Cr(VI) and Cr(VI)/As(III) multi-component synergistic photocatalytic systems relative to the single-component photocatalytic systems. The synergistic photocatalytic mechanisms in the 4-FP/Cr(VI) and Cr(VI)/As(III) multi-component synergistic photocatalytic systems were systematically discussed.
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高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 38
·20195-20201
·
IF 8.867
Jiuwang Gu,Qitong Huang,Yufei Yuan,Kai-Hang Ye,Zilong Wang,Wenjie Mai
Unfavorable interfacial electron back-injection, sluggish surface kinetics, and poor bulk conductivity leading to remarkable recombination are the key issues which significantly hinder the solar-to-hydrogen efficiency of PEC photoanodes. In this study, Ti foil is employed as the substrate for fabricating BiVO4 photoanodes. Surface passivation of TiO2 is sophisticatedly designed to block interface recombination in solar water splitting for the first time, so that a significant two-fold increase in photocurrent and a large decrease in dark current are observed. In addition, to address the other two issues, CoOx oxygen evolution catalysts (OECs) and Mo/N doping are applied to increase the photocurrent density and applied bias photon-to-current efficiency to 5.04 mA cm−2 at 1.23 VRHE and 1.41% at 0.75 VRHE, respectively, under AM 1.5 G illumination, which suggests the great potential of integrating strategies to target specific issues in BiVO4 photoanodes.
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高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 33
·16872-16879
·
IF 5.968
Zai-lin Gong,Dong-yan Tang,Yu-di Guo
This article reports on the fabrication of hybrid titanium dioxide (TiO2) nanoparticles grafted with thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) and their self-flocculation effect caused by the thermal phase transition and entanglement behavior of PNIPAM. Surface-initiated atom transfer radical polymerization (ATRP) of N-isopropylacrylamide (NIPAM) was conducted rapidly (within a few minutes) in aqueous solution at ambient temperature by using CuBr/N,N,N′,N′′,N′′-pentamethyldiethylenetriamine (PMDETA) as the catalysts and started from the surface of TiO2 nanoparticles derivatized with ATRP initiators. Without purifying the inhibitor, the grafted PNIPAM gives low molecular weights (Mn < 3000) and a narrow molecular weight distribution (PDI < 1.1) determined by GPC detection, which gives the hybrid TiO2–PNIPAM both a self-flocculation effect with rapid response to temperature, and a temperature-controlled switching effect of the degradation of Rhodamine B in solution. Moreover, the hybrid TiO2–PNIPAM exhibits a particular dispersion effect at ambient temperature in aqueous solution caused by the hydrophilicity and the entanglement interaction of the grafted PNIPAM. These effects for hybrid TiO2–PNIPAM provide a new way to re-use TiO2 nanoparticles for pollutant degradation systems and to avoid secondary pollution effectively due to the thermal phase transition and entanglement behavior.
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Journal of Energy Chemistry
·
2021
·
IF 9.676
Dan Lv,Dongdong Wang,Nana Wang,Hongxia Liu,Shaojie Zhang,Yansong Zhu,Kepeng Song,Jian Yang,Yitai Qian
Fast charging and high volumetric capacity are two of the critical demands for sodium-ion batteries (SIBs). Although nanostructured materials achieve outstanding rate performance, they suffer from low tap density and small volumetric capacity. Therefore, how to realize large volumetric capacity and high tap density simultaneously is very challenging. Here, N/F co-doped TiO 2 /carbon microspheres (NF-TiO 2 /C) are synthesized to achieve both of them. Theoretical calculations reveal that N and F co-doping increases the contents of oxygen vacancies and narrows the bandgaps of TiO 2 and C, improving the electronic conductivity of NF-TiO 2 /C. Furthermore, NF-TiO 2 /C exhibits the high binding energy and low diffusion energy barrier of Na + , significantly facilitating Na + storage and Na + diffusion. Therefore, NF-TiO 2 /C offers a high tap density (1.51 g cm −3 ), an outstanding rate performance (∼125.9 mAh g −1 at 100 C), a large volumetric capacity (∼190 mAh cm −3 at 100 C), a high areal capacity (∼4.8 mAh cm −2 ) and an ultra-long cycling performance (∼80.2% after 10,000 cycles at 10 C) simultaneously. In addition, NF-TiO 2 /C||Na 3 V 2 (PO 4 ) 3 full cells achieve an ultrahigh power density of 25.2 kW kg −1 . These results indicate the great promise of NF-TiO 2 /C as a high-volumetric-capacity and high-power-density anode material of SIBs.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Zhifeng Jiang,Kun Qian,Chengzhang Zhu,Hongli Sun,Weiming Wan,Jimin Xie,Huaming Li,Po Keung Wong,Shouqi Yuan
Photocatalytic H 2 evolution from water splitting requires an efficient photocatalyst with excellent charge separation ability and broad visible-light adsorption region. 0D CdS-TiO 2 nanodots (NDs) were successfully decorated on the 2D g-C 3 N 4 sheets via an epitaxial growth process. The as-synthesized ternary composite of CdS-TiO 2 @g-C 3 N 4 exhibits enhanced visible-light-driven photocatalytic H 2 evolution activity, as compared to the binary composites and their single components, which is about 6.7 and 11.2 times higher than those of single CdS and g-C 3 N 4 , respectively. Moreover, the as-obtained ternary composite has an external quantum efficiency (EQE) of 11.9% at 420 nm, implying the high utilization efficiency of photo-induced charges. In addition, the superior photostability can be achieved by this coupling method. The enhanced photocatalytic activity was attributed to the efficient charge separation originated from the three-level electron transfer system, the matched energy level positions, the abundant adsorption sites and active sites (0D/2D structure) and the synergistic effect among CdS, TiO 2 and g-C 3 N 4 . The work present here demonstrated that the construction of this three-level electron transfer system is an effective strategy to design more efficient ternary materials toward solar energy conversion (like H 2 production and CO 2 reduction).
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Xuan Luo,Zepeng Pu,Haowei Li,Enyan Zhao,Xiaohui Yang,Aiping Fu,Xuehua Liu,Yu-Guo Guo,Hongliang Li
Lithium‑sulfur batteries (LSBs) with a high theoretical specific capacity are considered as one of the most promising energy storage devices for next-generation. However, issues such as the insulation of pristine sulfur, the shuttle effect of polysulfides (LiPSs), and the volume change of sulfur cathode during cycling hinder their commercial applications. In this work, composite microspheres of TiO 2 @p-C consisting of porous carbon decorated with TiO 2 nanoparticles, have been designed and synthesized aiming to confine and trap the polysulfides inside the porous substrates and to improve the kinetics of the electrochemical reaction therein. TiO 2 particles with size of a few nanometers are prepared by a tetraethyl ammonium hydroxide assisted sol-gel method. Composite microspheres of TiO 2 @p-C are created through spray drying technique using chitosan as carbon source, and nanoparticles of SiO 2 with TiO 2 as co-template while selectively etching of the former. The confinement effects via the pores in the TiO 2 @p-C microspheres and the affinity between the polar TiO 2 moieties and the polysulfide species work synergistically, alleviating the effusion of the polysulfides and promoting the conversion reaction of them as well. As a result, the shuttle effect of polysulfides can be inhibited obviously. Significantly, the S@TiO 2 @p-C-2 composite cathode exhibits excellent cyclic performance of 1263 mAh g −1 at 0.2C and maintains still a discharge capacity of 809 mAh g −1 after 100 charge and discharge cycles. At a current density of 2C, it still delivers an outstanding specific capacity of 772 mAh g −1 . In the case of high sulfur load up to 90 wt%, the discharge capacity of S@TiO 2 @p-C-2 composite electrode could still maintain at 469.5 mAh g −1 after 100 cycles under current density of 0.2C.
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高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Jianan Dai,Chao Wu,Jing Ma,Shu-Hao Chang,Weiwei Liu
The conventional heterojunction formed by combining two different semiconductors is associated with issues of low compatibility, restricted intimate contact, and limited charge anti-recombination process. To address these issues, a simple strategy was adopted to fabricate a hetero-phase junction flanked with two dissimilar crystal phases of a single semiconducting material . This study employed TiB 2 as the initial material to fabricate an anatase/rutile TiO 2 hetero-phase junction material (AR-TiO 2 ), followed by its combination with highly conductive monolayer Ti 3 C 2 nanosheets to develop an AR-TiO 2 /Ti 3 C 2 composite photocatalyst . The photocatalyst displayed a wide range of light absorption and a remarkable capability for separating photogenerated carriers. The closely interconnected hetero-phase junction surface, formed by the rutile and anatase phases of AR-TiO 2 , combined with the incorporation of highly conductive Ti 3 C 2 nanosheets , synergistically increased the availability of multi-dimensional active sites and increased the efficacy of separating photogenerated electron pairs. The optimized AR-TiO 2 /Ti 3 C 2 achieved a degradation efficiency of 91.49 % for tetracycline hydrochloride (TCH) within 2 h and produced 1005.81 μmol of hydrogen in 6 h. The impacts of initial pH, co-existing anions, initial TCH concentration, initial temperature, and various pollutant species on the catalytic efficiency were also investigated. pH was shown to have the greatest impact on the photocatalytic performance of AR-TiO 2 /Ti 3 C 2 for TCH degradation. •O 2 − , and h + were identified as the primary reactive species that enabled the photocatalytic performance of AR-TiO 2 /Ti 3 C 2 through trapping experiments. This study presents a novel method to synthesize hetero-phase junction photocatalysts and suggests that Ti 3 C 2 has potential prospects for use in photocatalysis .
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产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 45
·2204446
·
IF 15.153
Hui Shu,Changtao Peng,Qian Chen,Zhangfeng Huang,Chen Deng,Wenjie Luo,Haijin Li,Wenfeng Zhang,Wenhua Zhang,Yuelong Huang
Combining two kinds of electron transport layer (ETL) which have complementary advantages into a bilayer structure to form a bilayer ETL is an effective way to transcend inherent limitations of single-layer ETL, which is very helpful in the development of perovskite solar cells (PSCs). In this work, a strategy is proposed to break constraints on the application of the staggered bilayer ETL in high-efficiency PSC, namely utilizing a built-in field to overcome the dilemma in E CBM making it possible to improve V OC and FF simultaneously by tuning the Fermi level of ETLs properly. According to the strategy, a bilayer ETL structure comprised of C-TiO 2 and SnO 2 layer and corresponding Li-doping process are developed, and the characterization results confirm the effectiveness of the strategy, making the potentials of the C-TiO 2 (Li)/SnO 2 bilayer ETL fully released for its application in high-efficiency PSCs: a V OC of 1.201 V for an ordinary triple-cation-perovskite-based PSC and a photoelectric conversion efficiency of 24.3% for a low-bandgap-perovskite-based PSC with high haze FTO superstrate are successfully achieved, indicating that the C-TiO 2 (Li)/SnO 2 bilayer ETL is a successful application paradigm of the proposed strategy and very promising in the application of high-efficiency PSCs.
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PubMed
高影响因子
SOLAR ENERGY
·
2019
·
IF 4.674
Han Song,Zhenxiao Pan,Huashang Rao,Xinhua Zhong
The time-consuming transport of photo-generated electrons across conventional photoanode film, composed of disordered P25 TiO 2 nanoparticulates, is one of the main bottlenecks to improve the performance of quantum dot-sensitized solar cells (QDSCs). A convenient and effective method was developed for the preparation of high performance photoanodes based on composite paste composed of conventional P25 TiO 2 nanoparticulates and TiO 2 hierarchical nanowires (HNW) for QDSCs. The shortened transport path in the composite photoanode brings forward suppressed charge recombination processes at the interfaces between photoanode and electrolyte, and improved photovoltaic performance of the resulting solar cells. Through optimizing the composite photoanode and the adoption of N-doped mesoporous carbon/Ti counter electrodes, average power conversion efficiency of Zn-Cu-In-Se (ZCISe) QDSCs was increased from 12.77% corresponding to conventional P25 photoanodes to 13.43% ( J sc = 27.38 mA cm −2 , V oc = 0.764 V, and FF = 0.642) corresponding to photoanodes with HNW/P25 weight ratio of 0.1%. Furthermore, this composite photoanode is also effective in improving the photovoltaic performance of QDSCs under different QD sensitizers (such as Zn-Cu-In-S (ZCIS) QDs) as well as different counter electrodes (such as Cu 2 S/brass).
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 87
·84457-84463
·
IF 3.289
Jiangshan Zhou,Fangzhou Li,Chun Du,Junming Liu,Yinzhen Wang,Wei Li,Guannan He,Qinyu He
In recent years, microwave sintering has become a common tool in materials science because of its rapid heating rate and high energy utilization efficiency. In this study, a fast one-step microwave method (3 min) was employed to prepare a porous nitrogen and carbon co-doped TiO2/activated carbon ((C,N)-TiO2/AC) composite bulk material. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), and electrical conductivity measurements. Photodegradation and recyclability experiments were also performed. For comparison, a sample was made by physically mixing (C,N)-TiO2 and AC, and was characterized and examined by the same technique. The photodegradation of a methyl orange solution by the porous (C,N)-TiO2/AC bulk revealed its good photocatalytic properties, with 94% photodegradation occurring within 100 min of irradiation following the initial 4 h of adsorption in the dark. The porous (C,N)-TiO2/AC bulk also demonstrated very good recyclability, achieving 94% photodegradation in the 6th recycle. The results show that the composite material can be used in commercial photodegradation processes because of its low cost, simple method of preparation, and good recyclability.
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高影响因子
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