Nano Research
·
2024
·Vol. 17
·期 6
·4764-4772
·
IF 9.5
Duan Yuhao,Wei Liuxu,Cai Chenyu,Mi Junbao,Cao Fuyuan,Chen Jiaze,Li Xiaolong,Pang Xiujiang,Li Bin,Wang Lei
The chlorine evolution reaction (CER) is a crucial step in the production of chlorine gas and active chlorine by chlor-alkali electrolysis. Currently, the endeavor to fabricate electrodes capable of yielding high current density at minimal overpotential remains a central challenge in advancing the realm of chlorine evolution reactions. Here, we grow TiO 2 and RuO 2 on MXene@carbon cloth (CC) through the favorable affinity and induced deposition effect between the surface functional groups of MXene and the metal. A self-supported electrode (RuTiO 2 /MXene@CC) with strong binding at the electrocatalyst–support interface and weak adhesion at electrocatalyst–bubble interface is constructed. The RuTiO 2 /MXene@CC can reduce the electron density of RuO 2 by regulating the electron redistribution at the heterogeneous interface, thus enhancing the adsorption of Cl − . RuTiO 2 /MXene@CC could achieve a high current density of 1000 mA·cm − 2 at a small overpotential of 220 mV, superior to commercial dimensionally stable anodes (DSA). This study provides a new strategy for constructing efficient CER catalysts at high current density.
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Small
·
2018
·Vol. 14
·期 41
·1802443
·
IF 9.598
Xiao-Tian Gao,Ying Xie,Xiao-Dong Zhu,Ke-Ning Sun,Xu-Ming Xie,Yi-Tao Liu,Jian-Yong Yu,Bin Ding
Being conductive and flexible, 2D transition metal nitrides and carbides (MXenes) can serve in Li–S batteries as sulfur hosts to increase the conductivity and alleviate the volume expansion. However, the surface functional groups, such as OH and F, weaken the ability of bare MXenes in the chemisorption of polysulfides. Besides, they create numerous hydrogen bonds which make MXenes liable to restack, resulting in substantial loss of active area and, thus, inaccessibility of ions and electrolyte. Herein, a facile, one-step strategy is developed for the growth of TiO 2 quantum dots (QDs) on ultrathin MXene (Ti 3 C 2 T x ) nanosheets by cetyltrimethylammonium bromide-assisted solvothermal synthesis. These QDs act as spacers to isolate the MXene nanosheets from restacking, and preserve their 2D geometry which guarantees larger electrode–electrolyte contact area and higher sulfur loading. The stronger adsorption energy of polysulfides with TiO 2 (than with Ti 3 C 2 T x ), as proven by density functional theory calculations, is essential for better on-site polysulfide retention. The ultrathin nature and protected conductivity ensure rapid ion and electron diffusion, and the excellent flexibility maintains high mechanical integrity. In result, the TiO 2 QDs@MXene/S cathode exhibits significantly improved long-term cyclability and rate capability, disclosing a new opportunity toward fast and stable Li–S batteries.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chengkai Liu,Yuan Tian,Yongling An,Qinglin Yang,Shenglin Xiong,Jinkui Feng,Yitai Qian
Gel electrolytes are key components for flexible energy storage devices. However, disadvantages such as poor ionic conductivity and mechanical behavior limit the practical applications of gel electrolytes. Herein, two-dimensional TiO 2 nanosheets are fabricated from Ti 3 C 2 T x MXene by a one-step hydrothermal reaction . The structure and component of Ti 3 C 2 T x MXene can be easily controlled by modulating the synthesis conditions. Influences of TiO 2 nanosheets content in PVA-based gel electrolyte are explored, which brings higher ionic conductivity and better mechanical properties with suitable additive amount. As a consequence, with the hybrid gel electrolyte, highly stable Zn plating/stripping is achieved (over 3000 h at 0.5 mA cm −2 ). Full Zn||PVA-Zn(CF 3 SO 3 ) 2 -TiO 2 ||V 2 O 5 cell shows high capacity (216 mAh g −1 after 115 cycles) and excellent cycling performance. This work provides an alternative route to develop high performance hybrid gel electrolyte for flexible energy storage devices such as Li/Na/K/Zn and supercapacitors.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 7
·7150-7160
·
IF 1.798
Yu Libo,Ren Xuefeng,Yang Zirong,Han Yuqi,Li Zhen
Highly ordered TiO 2 nanowire (NW) arrays were constructed by hydrothermal process as support materials for quantum dot sensitized solar cells (QDSSCs). The CdS x Se 1−x alloyed quantum dots (QDs) with tunable composition have been assembled onto the TiO 2 NW arrays via a facile hydrothermal method to form CdS x Se 1−x /TiO 2 NW photoanodes. The light absorption range of the CdS x Se 1−x /TiO 2 NW photoanodes can be controlled by changing the atomic ratio of S to Se. Based on CdS x Se 1−x /TiO 2 NW photoanodes, the photovoltaic performance of these CdS x Se 1−x /TiO 2 NW solar cells gradually improved as the increase of Se content in CdS x Se 1−x alloyed QDs. Among all sample CdS x Se 1−x /TiO 2 NW solar cells which were prepared with different feed molar ratio of S:Se, the CdS 0.27 Se 0.73 /TiO 2 NW solar cell (prepared with S:Se = 0:4) produced the highest power conversion efficiency up to 2.46 %. The results of investigation into optical properties and incident photon-to-current conversion efficiency indicates that the enlarged light absorption range and effective photo-to-electrical efficiency can be obtained with Se-rich CdS x Se 1−x /TiO 2 NW photoanodes, which contribute to the enhanced photovoltaic performance of the CdS 0.27 Se 0.73 /TiO 2 NW solar cell.
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RSC Advances
·
2016
·Vol. 6
·期 32
·27094-27101
·
IF 3.289
Xiao Yu,Ling Xin,Yong Liu,Wenxia Zhao,Baojun Li,Xiang Zhou,Hui Shen
One of the main drawbacks with applying the most promising electrode materials in lithium-ion batteries is their intrinsic poor electronic conductivity. Many approaches which include mixing them with good electrical conductors have been developed to solve this problem, yet they do not improve the lattice electronic conductivity within the crystal. Here we present a one-step hydrothermal route for fabricating the core–shell heterostructures through sequential growth of the core and shell materials. The cores are Nb-doped TiO2 rods with improved conductivity that can deliver high capacity, yet the Nb2O5 nanosheets shells can act as a protective layer to prevent electrode dissolution and maintain the electrode integrity over long term cycles and contribute additional lithium storage capacity. When employed as an anode material in lithium-ion batteries, it exhibits an outstanding cycle stability of 189 mA h g−1 at 170 mA g−1 for more than 700 cycles. This work provides an important strategy to improve the conductivity of the host and construct a protective layer by simply adding a guest ion in reaction.
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ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Xiong Yin,Zhongzhong Xu,Yanjun Guo,Peng Xu,Meng He
Perovskite solar cells, which utilize organometal–halide perovskites as light-harvesting materials, have attracted great attention due to their high power conversion efficiency (PCE) and potentially low cost in fabrication. A compact layer of TiO2 or ZnO is generally applied as electron-transport layer (ETL) in a typical perovskite solar cell. In this study, we explored ternary oxides in the TiO2–ZnO system to find new materials for the ETL. Compact layers of titanium zinc oxides were readily prepared on the conducting substrate via spray pyrolysis method. The optical band gap, valence band maximum and conduction band minimum of the ternary oxides varied significantly with the ratio of Ti to Zn, surprisingly, in a nonmonotonic way. When a zinc-rich ternary oxide was applied as ETL for the device, a PCE of 15.10% was achieved, comparable to that of the device using conventional TiO2 ETL. Interestingly, the perovskite layer deposited on the zinc-rich ternary oxide is stable, in sharp contrast with that fabricated on a ZnO layer, which will turn into PbI2 readily when heated. These results indicate that potentially new materials with better performance can be found for ETL of perovskite solar cells in ternary oxides, which deserve more exploration.
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JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2026
·
IF 4.1
Zheng Chen,Yang Yu-Ma,Xiao Jian-Wu,He Jun-Jie,Lin Bo,He Fu-An
In this work, the novel multifunctional electrospun trimethoxy (1H,1H,2H,2H-heptadecafluorodecyl)silane (TMHFDS)/Ag-TiO 2 /polyvinylidene fluoride (PVDF) mats were prepared. In the preparation process, the AgNO 3 was reduced to be the Ag nanoparticle and then in situ deposited on the TiO 2 nanoparticle to form the Ag-TiO 2 hybrid, which was used as the filler to fabricate the electrospun Ag-TiO 2 /PVDF mats followed by the TMHFDS modification. The successful preparation of the electrospun TMHFDS/Ag-TiO 2 /PVDF mats were proved by the characterizations of scanning electron microscopy, two-dimension energy-dispersive X-ray spectroscopy mapping, Fourier transform infrared spectroscopy, differential scanning calorimeter, and wide-angle X-ray diffraction. The electrospun TMHFDS/Ag-TiO 2 /PVDF mats possessed not only the enhanced crystallinity degree and useful piezoelectric β-crystal content of PVDF than those of the PVDF solid film and the electrospun PVDF mat but also the photocatalytic degradation ability for the oil red O dye. Moreover, for the electrospun TMHFDS(3%)/Ag-TiO 2 (30%)/PVDF mat, its water contact angle reached as high as 156.4° which was 24.6° higher than that of the electrospun PVDF mat before the TMHFDS modification, and its oil absorption capacities for valorous oils ranged between 16.3 g g −1 and 25.1 g g −1 , exhibiting the well oil–water separation ability.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yuxiang Deng,Zhenyu Cai,Libo Yang,Zhiyao Wu,Bihong Chen,Chang Gao,Xinyu Yu,Nannan Wang,Xinpeng Wang
3DOM-TiO 2 /CuO S-scheme heterojunction synthesized via hard templating • Removes 99.06% U(VI) in 120 min; capacity of 1751.33 mg/g • Dynamic Cu valence change & O-vacancy evolution restrain charge recombination. • In situ multi-spectra & DFT reveal charge transfer and U(VI) reduction mechanism. Photocatalysis offers a sustainable approach for uranium-containing wastewater remediation, yet conventional materials still suffer from limited solar-light utilization and rapid charge recombination. Herein, a three-dimensional ordered macroporous TiO 2 /CuO composite (3DOM-TC) was synthesized using resorcinol–formaldehyde resin spheres as a hard template. The ordered macroporous TiO 2 framework enables slow-photon-assisted light harvesting and multiple light scattering, while CuO coupling broadens the light-response range and constructs an S-scheme TiO 2 /CuO heterojunction to promote directional charge separation. Meanwhile, oxygen vacancies mainly serve as electron-trapping and O 2 /intermediate adsorption–activation sites, which are coupled with the dynamic Cu 2+ /Cu + variation during photocatalysis. As a result, 3DOM-TC achieves 99.06% U(VI) removal within 120 min, corresponding to a maximum extraction capacity of 1751.33 mg/g. Photoelectrochemical tests confirm enhanced photocurrent density and efficient interfacial charge transport compared with pristine TiO 2 . In situ EPR, XPS, and DFT calculations reveal the photoinduced charge-transfer pathway and illumination-enhanced oxygen-vacancy signals. Moreover, in situ FTIR spectroscopy confirms that photogenerated ·O 2 − can further convert to H 2 O 2 -related species, thereby promoting U(VI) precipitation as (UO 2 )O 2 ·4H 2 O. This work highlights the synergistic integration of 3DOM-enabled light harvesting, S-scheme charge separation, and vacancy-assisted electron transfer and O 2 activation, providing a promising strategy for efficient photocatalytic U(VI) sequestration. Download: Download high-res image (232KB) Download: Download full-size image
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Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Lin Daifeng,Gong Wanyu,Lu Zeyang,Zhuo Qian,Yang Wenqing
Herein, Ru-doped V 2 O 5 -WO 3 /TiO 2 (VWTi) catalysts were prepared to study the impact of Ru doping on chlorobenzene (CB) oxidation activity. The introduction of Ru weakens the V–O bond strength, resulting in neutralizing the Lewis acid effect and optimizing the overall acid balance of the VWTi catalyst. Moreover, the presence of RuO 2 can significantly enhance the redox capability and surface lattice oxygen mobility. Hence, a significant improvement in both low-temperature activity and CO 2 selectivity has been achieved with the Ru-doped VWTi catalyst, reaching a CB conversion of 50% at 205 °C and a CO 2 selectivity of 73% at 400 °C for 0.50Ru-VWTi catalyst.
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LANGMUIR
·
2026
·
IF 4.4
Yuxin Yan,Yurong Ma
The relationship between the nanostructures and the long-term properties of slippery liquid-infused porous surfaces (SLIPS), including liquid-holding ability and anti-icing performance, is an important issue, but poorly systematically elucidated. Herein, we used TiO2 nanotube arrays with exquisitely designed diameter and length as a model system to investigate the effects of the structural parameters on the long-term properties of SLIPS. The TiO2 nanotube arrays with diameters ranging from 40 to 110 nm and lengths from 3 to 12 μm were fabricated for the first time on Ti substrates via an optimized anodic oxidation method and then infused with a lubricant to form SLIPS with superior slippery properties. The contact angle hysteresis (CAH) of TiO2 SLIPS after 20 min high-speed centrifugation or 7 day water shearing was lower than 4° or as low as 8°, respectively, indicating the excellent liquid-retention property of TiO2 SLIPS. We propose that the long-term liquid-holding ability of the obtained TiO2 SLIPS is attributed to the synergistic effect of the small nanotube diameter (strengthening capillary force) and the large porous volume (enhancing lubricant storage). Furthermore, we find that icing on TiO2 SLIPS can be delayed for more than 24 h at low temperature (−22 °C), indicating the superior anti-icing ability derived from the lubricant film maintained by the optimized structures. The results reveal that structural parameters, including the nanotube diameter and length and porous volume that can be used to hold lubricant, significantly influence the slippery property, liquid-holding property, and long-term anti-icing property of SLIPS.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 15
·1145
·
IF 3.2
Mao Tan,Wang Wei,Liu Peilong,Zha Junyan,Bu Xiran,Song Rui,Luo Xueke
To overcome the intrinsic limitations of TiO 2 , specifically its wide band gap and rapid photogenerated carrier recombination, for dyeing wastewater treatment, a Yb 3+ /Er 3+ co-doped TiO 2 -ZnO heterostructure was fabricated by sol–gel method. X-ray diffraction revealed inhibited anatase-to-rutile phase transition. X-ray photoelectron spectroscopy confirmed Ti 2p binding energy shifts, indicating strong electronic interactions between dopants and the host lattice. Ultraviolet–visible diffuse reflectance spectroscopy showed band gap narrowing to 2.927 eV, with upconversion effect extending light absorption to the near-infrared region. Photoluminescence measurements demonstrated suppressed carrier recombination, and XPS confirmed abundant oxygen vacancies. The optimal sample achieved 74.31% methylene blue degradation under visible light for 6 h and 98.58% under ultraviolet light for 2 h, outperforming commercial P25. The Yb 3+ /Er 3+ co-dopants serve dual functions: they act as upconversion centers to harvest low-energy photons and function as electronic modulators that induce Ti 2p binding energy shifts and create oxygen vacancies, thereby enhancing charge separation and surface reactivity. This work integrates rare-earth co-doping with heterojunction engineering to boost TiO 2 photocatalysis.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Jianxiang Xiong,Xuejun Lai,Hongqiang Li,Hao Wang,Xiangyu Su,Xingrong Zeng
The tracking resistance of silicone rubber was commonly improved by incorporating a large amount (>40 wt%) of inorganic fillers, such as aluminum hydroxide, which severely deteriorated its processability and mechanical properties. In this work, platinum-anchored TiO 2 (Pt@TiO 2 -450) was prepared by impregnating TiO 2 in H 2 PtCl 6 aqueous solution and heating at 450 ℃. It was found that the platinum-anchored rutile TiO 2 (Pt@TiO 2 -R450) and fluorophlogopite nanosheet (FPN) could synergistically promote the ceramization of silicone rubber to significantly enhance its tracking resistance. When the content of Pt@TiO 2 -R450 and FPN was 1.0 phr and 0.5 phr, respectively, the tracking resistance of SR/Pt@TiO 2 -R450 reached 1A4.5 level and the erosion ratio was 0.7%. After heating at 1000 ℃ for 1 h, the organic–inorganic conversion ratio and flexural strength were 47.1% and 7.02 MPa, respectively. High-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) spectroscopy revealed that the exposed crystal plane of rutile TiO 2 in Pt@TiO 2 -R450 was (110) plane and oxygen vacancies were generated during high-temperature treatment. The oxygen vacancies could anchor Pt and suppress its aggregation at elevated temperature. Meanwhile, the electron transfer from TiO 2 to Pt reduced the oxidation state of Pt species to enhance the catalytic activity for crosslinking of silicone rubber at elevated temperature, which promoted the organic–inorganic conversion to form ceramic barrier. The skeletal support and barrier effect of FPN further improved the compactness of the ceramic barrier. As a result, the silicone rubber rapidly formed a compact SiOC-like ceramic barrier on its surface when subjected to arc discharge, which efficiently defended arc bombardment and heat transfer. Therefore, the tracking resistance of silicone rubber was significantly enhanced.
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