NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 36
·17026-17031
·
IF 3.3
Ya-Jiao Zhang,Shi-Tian Xiao,Yi-Tian Wang,Feng-Juan Wu,Si-Ming Wu,Lu Wu,Fu-Fei Pu,Li-Ying Wang,Ge Tian,Cong-Yun Huang,Xiao-Yu Yang
Hierarchical TiO2 nanofibers with enriched surface hydroxyl groups and oxygen vacancies have been synthesized. An assessment of their photocatalytic properties shows that the new catalyst has high stability and exhibits excellent photocatalytic H2 production performance in seawater. The enhanced activity of the catalyst is a consequence of the elevation in the rates of charge transfer and H+ adsorption by the synergistic effects of surface hydroxyls and oxygen vacancies.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Xian Hou,Jianping Zhou,Sumei Huang,Wei Ou-Yang,Likun Pan,Xiaohong Chen
Circular plate like lithium doped hierarchical TiO 2 (Li-hier-TiO 2 ) nanostructures were synthesized and scattered on the compact TiO 2 layer as a quasi-scaffold layer for perovskite solar cells (PSCs). The quasi-scaffold layer provides superior contact properties with perovskite layer and helps to form the high quality perovskite film with better crystallinity and less pin-holes. Simultaneously, Li-hier-TiO 2 quasi-scaffold compared to pure hier-TiO 2 quasi-scaffold exhibits superior electronic properties due to the reduced trap states together with better electron transport and extraction abilities. PSCs using Li-hier-TiO 2 quasi-scaffold layer to host the CH 3 NH 3 PbI 3 photoactive layer produce substantially higher PCE of 18.25% with suppressed hysteretic behavior, which is obviously higher than PCE (15.64%) of PSCs using pure hier-TiO 2 quasi-scaffold layer.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2015
·
IF 1.09
Yupeng Gao,Hao Chen,Aiguo Zhou,Zhengyang Li,Fanfan Liu,Qianku Hu,Libo Wang
Hierarchical TiO 2 /carbon nanocomposites were synthesized by oxidation of two-dimensional (2D) Ti 3 C 2 nanosheets at different temperatures. Crystal structures and morphologies of the obtained samples were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and Raman spectroscopy. The results show that 2D Ti 3 C 2 nanosheets are partially oxidized to form a novel hierarchical nanostructure which is composed of carbon nanosheets and TiO 2 nanoparticles. With the calcination temperature increasing, the crystal structure of TiO 2 nanoparticles changes from anatase to rutile and the hierarchical structure was gradually destroyed. The photodegradation results reveal that the samples obtained at 200°C and 285°C show much better photocatalytic properties than P25. And meanwhile the photocatalytic property will become worse with the increase in calcinations temperature.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 44
·19192-19200
·
IF 3.288
Jixin Ai,Zhiguang Guo
Functional superamphiphobic coatings have attracted great attention due to their promising applications in oil transportation and anti-contamination. Herein, a superamphiphobic cotton fabric with excellent mechanical stability and antifouling property was constructed by coating flower-like TiO2 nanoparticles onto the cotton fabric surface by a facile spraying method and further modification with 1H,1H,2H,2H-perfluorooctyltrichlorosilane (FOTS). The synthetic mechanism, surface structure, chemical composition of the F-TiO2 particles were investigated by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), respectively. The prepared cotton fabrics exhibited high liquid repellency to water, rapeseed oil, glycerol, 1,2-dichloroethane and n-hexadecane with a lower surface tension, showing a contact angle of 159°, 157°, 155°, 153° and152°respectively. Furthermore, the F-TiO2-coated fabrics displayed excellent self-cleaning and self-healing properties. Moreover, the great mechanical stability of F-TiO2 fabrics was confirmed after sand paper abrasion and water-impacting tests. The result indicates that F-TiO2 coatings with versatile abilities exhibited promising potential to achieve numerous applications.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2019
·
IF 1.901
Jie Hu,Yi Lu,Xiao-Fang Zhao,Yu-Qian Tang,Yuan-Zhou Li,Yu-Xuan Xiao,Zhi-Yi Hu,Bao-Lian Su,Xiao-Yu Yang
TiO 2 hierarchical microsphere assembled from anatase TiO 2 nanosheets has been successfully prepared and exhibited excellent catalytic activities of H 2 production and benzyl alcohol selective oxidized to benzaldehyde. These enhanced photoactivity can be mainly ascribed to the charge separation promoted by the surface F and nanosheet units, enhancement of substrate molecular transport profited from the hierarchical structure.
研究领域:
材料科学
·
光催化领域
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 27
·21237-21241
·
IF 3.84
Guoqiang Zhang,Zhao Zhao,Huaqiao Tan,Haifeng Zhao,Dan Qu,Min Zheng,Weixing Yu,Zaicheng Sun
Hierarchical TiO2 spheres composed of nanosheets are successfully synthesized via a simple solvothermal route. TiO2 spheres with high surface area (∼100 m2 g−1) exhibit excellent photocatalytic activity. Au nanoparticles are loaded on the surface of TiO2 nanosheets through anchor molecules – thiolglycolic acid. The LSPR absorption band at ∼550 nm of Au nanoparticles is clearly observed in the diffusion reflective UV-Vis spectra. H2 production results show that the TiO2 spheres have higher photocatalytic activity than commercial P25 TiO2. After loading with Au nanoparticles, TiO2–Au spheres display a 27.6 μmol (g−1 h−1) H2 production rate under visible light irradiation (λ > 420 nm) because the localized surface plasmon resonance (LSPR) of Au nanoparticles enhances the visible light absorption. Furthermore, the H2 production rate could be improved to 92.4 μmol (g−1 h−1) for TiO2 spheres loaded with both Au and Pt nanoparticles. Based on these results, we propose a possible mechanism. Under UV light, TiO2 absorbs UV light and generates excited electrons, passing to Au nanoparticles for H2 production. In the case of visible light irradiation, the hot electrons are generated from Au nanoparticles due to the LSPR effect. And then the hot electrons are transferred from the Au nanoparticles to TiO2 and cocatalyst Pt nanoparticles for H2 generation.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 44
·22136-22144
·
IF 7.443
Renzhong Zhang,Xueqin Wang,Jun Song,Yang Si,Xingmin Zhuang,Jianyong Yu,Bin Ding
Construction of nanoparticle modified titanium dioxide nanofibrous membranes (TiNFs) with a mesoporous and stable nanoparticle-nanofiber composite structure would have significant implication for environmental remediation; however, currently nanoparticle-TiNFs are generally brittle with poor structural integrity upon large deformation; thus, creating flexible, robust, and stable nanoparticle-TiNF composites has proven to be extremely challenging. Herein, we report flexible and hierarchical mesoporous TiO2 nanoparticle (TiO2 NP) modified TiNF (TiNFNPs) composites fabricated by the combination of sol–gel electrospinning and in situ polymerization. The electrospun TiNFs served as templates and a synthesized bifunctional benzoxazine (BA-a) was used as a novel carrier and fixative for non-agglomerated growth of TiO2 NPs. Benefiting from the large surface area, high porosity, homogeneity, stable nanofiber–nanoparticle composite structure, and robust mechanical properties, the as-prepared anatase TiNFNPs exhibited excellent photocatalytic activity towards methylene blue including fast degradation within 30 min, good reversibility in 4 cycles, and easiness of recycling. Moreover, the degradation products have been analysed and TiNFNPs exhibited better photodegradation performance towards methylene blue compared with a commercial catalyst (P25). Significantly, the successful synthesis of such fascinating materials may provide a versatile platform for further development of nanofibrous membrane-based photoreactors towards water and air pollutant treatment.
研究领域:
材料科学
·
环境修复
·
纳米技术
·
光催化
·
高分子科学
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2020
·Vol. 7
·期 13
·2905-2916
·
IF 4.154
Keliang Jiang,Yongjian Niu,Dong Fang,Linlin Zhang,Cheng Wang
Graphical Energy boost : Simultaneous acceleration of lithium diffusion and electron transport is achieved by homogeneous sulfur incorporation into the hybrids of hierarchical TiO 2 nanosheets and carbon nanotubes (CNTs). Moreover, the numerous interfaces in the 0D-2D-1D architecture provide extra lithium accommodation sites, resulting in dominated capacitive lithium storage processes and boosted high-rate performances of S−TiO 2 /CNTs. To boost the lithium storage performance of TiO 2 , sulfur was homogeneously incorporated into the hybrids of hierarchical TiO 2 nanosheets and carbon nanotubes (CNTs) through a solvothermal-calcination process. The resulting 0D-2D-1D architecture endowed the hybrids with considerable interfaces for lithium accommodation and shortened pathways for lithium diffusion. Moreover, the interplane spacings of TiO 2 and CNTs were expanded and their electronic structures were modified atomically, owing to partial sulfur substitution for oxygen and carbon. Benefitting from the simultaneous acceleration of lithium and electron transport as well as the dominated capacitive charge storage mechanism, lithium-ion batteries based on S−TiO 2 /CNTs delivered an initial discharge capacity of 870.4 mAh g −1 at 0.2 A g −1 , a high-rate capacity of 119.3 mAh g −1 at 5.0 A g −1 and a reversible capacity of 195.5 mAh g −1 at 2.0 A g −1 after 700 cycles, far superior to the counterpart without sulfur doping and comparable to most reported TiO 2 -based nanostructures.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2018
·Vol. 8
·期 5
·1395-1403
·
IF 5.365
Yanyan Duan,Shaochen Zhou,Zhihong Chen,Jianmin Luo,Mei Zhang,Fu Wang,Tao Xu,Chuanyi Wang
An efficient photoelectrochemical water splitting system is developed based on a hierarchical TiO2 nanowire/microflower (H-TiO2) photoanode, which is synthesized via a one-step hydrothermal process. The H-TiO2 structure is formed via three primary self-assembly processes and simultaneously offers excellent ultraviolet light absorption capacity and large specific surface area. The H-TiO2 photoanode achieves a 1.3 fold enhancement in photocurrent density compared to its TiO2 nanowire-based counterpart at 1.23 V vs. reversible hydrogen electrode (the theoretical potential for water electrolysis). More strikingly, by incorporating the surface plasmon resonance (SPR) effect from Au nanoparticles (NPs), the resulting Au/H-TiO2-based photoanodes (Au/H-TiO2) exhibit an about two-fold enhancement in photocurrent density under both simulated sunlight and visible-light illumination. Moreover, the maximum photoconversion efficiency of Au/H-TiO2 gives three fold enhancement compared to that in the absence of Au NPs. Significantly, Au NPs incorporated on the H-TiO2 surface also serve as co-catalysts like Pt under white-light illumination, reducing the onset potential by about 0.15 V and the current saturation potential by about 0.18 V. The enhanced photoactivity under white light is due to the co-action of electron transfer from the efficient carrier separation of H-TiO2 (ultraviolet part) and Au to H-TiO2 under the SPR effect (visible part). The present study provides a new strategy for designing and fabricating TiO2-based devices with favorable energy conversion efficiency for photoelectrochemical water splitting.
研究领域:
材料科学
·
能源科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 33
·15569-15578
·
IF 3.3
Shengbiao Zheng,Jialong Fan,Feilong Yin,Jie Chen,Zhenzhen Hui,Jing Tang,Xuchun Wang,Jiahao Guo
A heterostructured TiO2/Co nanoparticle/N-doped carbon nanotube (TiO2/Co/NCNT) nanomaterial was derived from ZIF-67@TiO2 by calcination at high temperature in an Ar/H2 atmosphere. The obtained TiO2/Co/NCNT composite was made up of numerous dodecahedron-like boxes with twisting nanotubes on surfaces, modified on a glassy carbon electrode (GCE) for the electrochemical determination of tert-butylhydroquinone (TBHQ). The excellent electrocatalytic performance of TBHQ could be owing to the combination of multi-phase composition, fast electron transfer and the constructed Co/Ti multi-active sites. The TiO2/Co/NCNT sensor showed a broad linearity from 0.04 to 100 μM with a low detection limit of 4 nM, and possessed stability, anti-interfering ability and reproducibility. Finally, the analytical utility of the TiO2/Co/NCNT sensor was checked by detecting TBHQ in edible oil.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Hao Wang,Zhiguang Guo
Hierarchical TiO 2 submicron-sized spheres (TiO 2 HSSs) with diameters of 400–600 nm were synthesized by a facile one-step solvothermal method in ethanol solvent. The HSSs composed of nanoparticles of ∼14 nm have a relatively large surface area of ∼35 m 2 /g. When applied as the scattering overlayer in dye-sensitized solar cells (DSCs), such TiO 2 HSSs effectively improved light harvesting and led to the increase of photocurrent in DSCs. Furthermore, bilayer-structured photoanode also provided fast electron transportation and long electron lifetime as confirmed by electrochemical impedance spectra. As a result, DSC based on P25 nanoparticle underlayer and HSS-2 overlayer exhibited the highest cell efficiency (6.23%) compared with ones with pure P25 (5.50%) or HSS-2 (2.00%) photoanodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 4
·1194-1203
·
IF 3.069
Can Huang,Fengyi Wang,Daheng Wang,Zhiguang Guo
In this study, superamphiphobic coatings, which could repel liquids with a surface tension as low as 21.6 mN m−1 (n-octane), were prepared using a spray-coating method based on a flower-like hierarchical structure and highly fluorinated TiO2/SiO2 composite particles. And the coating exhibited broad liquid repellency to water-based composites, various oils, organic solvents and hot water. Moreover, the coating also possessed remarkable mechanical and chemical stability towards various forms of mechanical damage and in harsh chemical environments. Multiple features enable the coating to find more vital applications in antifouling, corrosion resistant, fuel transportation, gas adsorption, and protective coatings, etc.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）