CRYSTENGCOMM
·
2017
·Vol. 19
·期 18
·2509-2516
·
IF 3.474
Dedong Jia,Zhen Qi,Xuequan Li,Linlin Li,Li-Hua Shao,Hong Liu
TiO2 is one of the most extensively investigated materials owing to its unique properties and several promising applications. The properties of TiO2 are highly dependent on its microstructure and feature size. Herein, we report a strategy for the synthesis of hierarchical porous TiO2 with two distinguishable scales of ligament sizes, which consists of both macro-pores and meso-pores. A metallic melt dealloying process with CuTi alloy was followed to form a porous Ti precursor. Subsequently, this precursor was used as a substrate for anodization to form TiO2. By controlling the anodization potential, time and initial porous Ti ligament size, nanotubular nanotubes or nanoporous TiO2 were distributed uniformly on the ligaments of porous Ti. Both the sizes of the macropore (400 nm to 2 μm) and mesopore (10 to 30 nm) can be tuned. A core–shell structured TiO2/Ti composite with a nanoporous or nanotubular structure in the shell and un-anodized porous Ti in the core can be achieved by partial anodization. The hierarchical structure with high surface area is essential for mass transport (large pore) and functionality (small pore), which makes it a potential candidate for various applications such as in sensors and catalysts.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 4
·1011-1021
·
IF 5.934
Junping Ma,Qiuyu Zhao,Dongli Wei,Haiqiang Liu,Xiangke Wang,Zhe Chen,Jianjun Wang
The adsorption remediation of radioactive contamination from wastewater is scientifically and economically important. In this work, titanium dioxide-modified manganese dioxide (MnO2@TiO2) was prepared by immobilizing crystalline anatase titanium dioxide (TiO2) on the surface of alpha manganese dioxide nanowire (MnO2). The base material MnO2 nanowire acted as a physical template for the guest TiO2, and the formed MnO2@TiO2 composite exhibited a highly uniform core–shell nanorod structure. The MnO2@TiO2 composite was investigated as an efficient adsorbent for the removal of U(VI) from aqueous solution. In the same system, MnO2@TiO2 exhibited a much higher maximum adsorption capacity (105.3 mg g−1) for U(VI) as compared with MnO2 (13.3 mg g−1), showing that the performance of the surface-modified MnO2 was greatly improved. The fitting results for kinetic and isothermal models manifested that U(VI) ion adsorption by MnO2@TiO2 involved monolayer chemisorption. Characterization before and after adsorption was performed and the results compared and analyzed carefully, with the conclusion that there might be three kinds of interactions between U(VI) and MnO2@TiO2 during the adsorption process, namely inner-sphere surface complexation, chemical precipitation, and electrostatic interaction. The low-cost, facile fabrication method and efficient performance endow the adsorbent MnO2@TiO2 with a high potential for U(VI) removal from actual wastewater.
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2024
·Vol. 137
·期 3
·1535-1552
·
IF 1.7
Feng Shangzhen,Zhou Hantao,Jiang Huanjin,Yang Jie,Chen Jixiang
Herein, the Ni–Co alloy supported on TiO 2 catalysts were prepared by sol–gel method assisted with Polymethyl Methacrylate (PMMA) template, and they were tested for in situ aqueous phase hydrodeoxygenation (HDO) of methyl palmitate to hydrocarbons using methanol as hydrogen donor. It has been found that the introduction of PMMA decreases the Ni–Co alloy particles size, reduces the metal-support interactions (SMSI), constructs the mesopores and enlarges the mesopore size. Also, the Ni–Co alloy particles can be partially embedded in TiO 2 , beneficial to the catalyst stability since the sintering and leaching of the Ni–Co alloy particles can be suppressed under hydrothermal condition. In the in situ HDO of methyl palmitate, the main deoxygenation pathway is decarboxylation/decarbonylation on the Ni–Co alloy catalysts. The catalysts prepared with PMMA exhibits higher activity than that without PMMA, giving the pentadecane yield of 86.2% at 310 °C. This is ascribed to their more exposed active sites and wider mesopores. Moreover, the catalyst is not obviously deactivated during five reactions.
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2016
·Vol. 11
·期 1
·1-9
·
IF 2.584
Wang Wen,Zhang Zongbao,Cai Yangyang,Chen Jinshan,Wang Jianming,Huang Riyan,Lu Xubing,Gao Xingsen,Shui Lingling,Wu Sujuan,Liu Jun-Ming
In this work, perovskite solar cells (PSCs) with CH 3 NH 3 PbI 3- x
Cl
x
as active layer and spiro-OMeTAD as hole-transport media have been fabricated by one-step method. The methylammonium iodide (CH 3 NH 3 I) solution with different concentrations is used to modify the interface between mesoporous TiO 2 (meso-TiO 2 ) film and CH 3 NH 3 PbI 3− x
Cl
x
perovskite layer. Several techniques including X-ray diffraction, scanning electron microscopy, optical absorption, electrochemical impedance spectroscopy (EIS) and photoluminescence are used to investigate the effect of the interfacial modification. It is found that the interfacial modification by CH 3 NH 3 I enhance the crystallinity and increase the grain size of CH 3 NH 3 PbI 3− x
Cl
x
layer, and improve the surface wetting properties of perovskite precursor on meso-TiO 2 film. The sunlight absorption and external quantum efficiency of PSCs in the visible region with wavelength less than 600 nm have been improved. The Nyquist plots obtained from the EIS suggest that the CH 3 NH 3 I modification can reduce the charge recombination rates. The photoluminescence measurement shows that the exciton dissociation in the modified devices is more effective than that in the control samples. The photovoltaic performance of the modified devices can be significantly improved with respect to the reference (control) devices. The CH 3 NH 3 I modified devices at the optimized concentration demonstrate the average power conversion efficiency of 12.27 % in comparison with the average efficiency of 9.68 % for the reference devices.
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 47
·期 2
·348-356
·
IF 4.029
Hao Xu,Dongsheng Dai,Songsong Li,Lei Ge,Yangqin Gao
Semiconductor-based photocatalytic hydrogen evolution from water with earth-abundant and low cost co-catalysts has attracted much attention. Herein, novel Cu2(OH)2CO3 decorated 2D TiO2 nanosheets for photocatalytic water splitting were synthesized by a facile in situ synthetic method. The chemical and photophysical properties of Cu2(OH)2CO3/TiO2 nanosheets were investigated by X-ray diffractometry (XRD), transmission electron microscopy (TEM), UV-vis diffusion reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV) analysis. At an optimal Cu2(OH)2CO3 loading content of 1.5 mol%, the hybrid photocatalyst delivers a high photocatalytic H2 production rate of 1555.07 μmol g−1 h−1. Such enhanced photocatalytic activity is attributed to tight interfaces formed between Cu2(OH)2CO3 nanoparticles and TiO2 nanosheets, which play a vital role in the separation of photo-excited carriers, and the formation of active Cu1+ and Cu0 species can also benefit the charge separation process by reducing the over-potential of water reduction. Based on the above results, a possible mechanism is proposed and further verified using photoluminescence (PL) spectra. This work may provide more insight into the synthesis of novel Cu2(OH)2CO3/TiO2 nanosheets with high photocatalytic H2 evolution activity for solar-to-chemical conversion and utilization.
✓ 已验证
DOI
高影响因子
Nanoscale Horizons
·
2018
·Vol. 4
·期 2
·452-456
·
IF 9.391
Yong Zhang,Wenxin Xu,Xiaojie Xu,Wei Yang,Siyuan Li,Jiaxin Chen,Xiaosheng Fang
It has always been a challenge to prepare self-powered ultraviolet photodetectors (UV PDs) utilizing a green, facile and low-cost method. Here, we provide such an approach for fabricating self-powered photodetectors based on Te nanowire/TiO2 nanoparticle (NP) and Te nanowire/ZnO nanoparticle (NP) heterojunctions. It is noteworthy that such devices were prepared via simply brushing non-toxic solution-processed Te nanowires and commercial TiO2 and ZnO nanoparticles onto paper. The as-obtained UV PDs can work under zero bias due to photovoltaic effects from the Te/TiO2 and Te/ZnO heterojunctions. This study not only presents high-performance UV PDs, but also provides a general and effective method for developing environmentally-friendly and energy-efficient optoelectronic devices for practical applications. The concept of employing daily-use brushes and recyclable paper provides a facile way to fabricate green low-cost PDs.
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2014
·
IF 4.908
He Chen,Qian Lin,Qiang Xu,Yang Yang,Zongping Shao,Yong Wang
Atomic layer deposition (ALD) of TiO 2 was applied on porous polypropylene (PP) membranes which were used as separators in lithium-ion batteries (LIBs) composed of Li 4 Ti 5 O 12 (LTO) anode/Li cathode. Without plasma activation on the bare PP membrane, the initial deposition of TiO 2 was based on the subsurface nucleation mechanism , which prevented the formation of a conformal hydrophilic TiO 2 layer at low ALD cycles. The improvement of wettability of the PP membrane to the electrolyte could only be achieved at high ALD cycles up to 500. However, the severe narrowing of membrane pores counterbalanced the wetting enhancement, which hardly improved the performance of the LIBs. Plasma pretreatment was efficient to generate active groups on the highly chemically inert surface of polypropylene membranes, thus ultrathin TiO 2 films could be conformally deposited by ALD on the membrane surface based on the layer-by-layer mechanism at cycles as low as 20. Such a conformal ultrathin layer of TiO 2 was confirmed to concurrently overcome both the thermal shrinkage and poor wettability of the PP membranes. Beneficial from the improved wettability at no expense of pore size, the electrochemical performances of LIBs such as specific discharge capacities at different discharge rates were upgraded.
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yuechang Lian,Xiaojing Wang,Shuaiyu Chen,Siyuan Xiang,Yuchao Wang,Shengyang Tao,Wendong Liu
Superhydrophobic fabrics exhibit exceptional potential for oil–water separation, providing effective solutions to environmental challenges such as industrial wastewater and marine oil spills. To streamline the fabrication process and mitigate oily contamination, we developed an in situ growth approach to coat polyester fabric with superhydrophobic TiO2-doped silicone nanofilaments. The coated fabric facilitates highly efficient oil–water separation and exhibits light-driven self-cleaning properties. By precisely controlling the synergistic hydrolysis conditions of methyl trichlorosilane (MTCS) and tetrabutyl titanate (TBT), TiO2-doped silicone nanofilaments were successfully grown on the fabric surface, resulting in a highly porous coating. Integrating this porous structure with the residual methyl groups from MTCS made the fabric superhydrophobic, allowing it to separate various oil–water mixtures efficiently with excellent reusability and high-pressure resistance (2950 Pa). Incorporating TiO2 further endowed the superhydrophobic fabric with light-driven self-cleaning capabilities, enabling the degradation of organic contaminants without compromising its liquid repellency. This simple, cost-effective, and productive fabrication method is highly adaptable, making it valuable for researchers aiming to introduce superhydrophobicity to diverse substrates and surfaces. With its high oil–water separation efficiency and light-driven self-cleaning properties, the superhydrophobic TiO2-doped silicone nanofilament-coated fabric holds significant potential for applications in oil pollution remediation, self-cleaning surfaces, and desalination.
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Xiangfeng Meng,Zhiping Wang,Xiaoting Lv,Lihuan Hou,Hong Jin,Wenjuan Li,Junwei An,Chen Wen
A composite anti-corrosion coating with five different graphene ratios was coated on the surface of 2A12 aluminum alloy, using graphene/TiO 2 mixed powder as the anti-corrosion filler and K 2 SiO 3 water glass as the matrix. Scanning electron microscope (SEM) and X-ray diffractometer (XRD) were used to characterize the microscopic morphology, element composition, and phase composition of coatings. The corrosion resistance of the coating was appraised using electrochemical characteristics such as AC impedance and polarization curves. The surface of the coatings with low graphene content is dense and level. The surface of coatings with graphene content exceeding 0.5 g (2.5 wt.%) exhibit large-sized pits and cracks, and large corrosion products are produced after immersion in 3.5 wt.% NaCl solution. All five coatings maintained a stable phase structure before and after corrosion. Electrochemical analysis shows that the increase in graphene content leads to a first strong and then weak physical barrier effect of the coating against corrosive media. The coating with 0.25 g(1.25 wt.%) graphene exhibits the best corrosion resistance, with its |Z| 0.01H z value maintaining around 10 5 Ω·cm². When the graphene content exceeds this value, the inhibition of the coating on corroding media will be weakened by reason of particle aggregation.
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Ying Xu,Shuili Yu,Zhiqiang Fan,Xingli Ji,Cong Huang,Zheng Xu,Rui Liu,Chao Jiang
Bromate (BrO 3 − ), a carcinogenic and regulated disinfection by-product, poses a persistent challenge to drinking water safety due to its high solubility and chemical stability. In this work, a noble-metal-free Fe 3 O 4 /TiO 2 /Bi photocatalyst was successfully prepared and subsequently applied for BrO 3 − reduction under ultraviolet light. The ternary composite design enables cooperative functionality among the components, where Fe 3 O 4 facilitates charge transfer and magnetic separability, Bi 0 acts as a hole scavenger, and TiO 2 serves as the primary photoactive material. Characterization results confirmed the successful formation of the heterostructure with enhanced charge separation properties. The composite containing 5 wt% Bi exhibited the highest activity, achieving 99 % BrO 3 − removal within 25 min at pH 7.0, with a pseudo-first-order rate constant of 0.185 min −1 , which is 11.8 times that of pure TiO 2 . The enhanced photocatalytic performance is ascribed to the synergistic effect between Bi, Fe 3 O 4 and TiO 2 . Bi 0 nanoparticles functioned as hole acceptors to suppress recombination, while Fe 3 O 4 facilitated electron transport and provided magnetic separability. The photocatalyst retained high activity over five consecutive cycles with negligible metal leaching and performance loss. In addition, its effectiveness was verified in tap water containing typical inorganic ions and dissolved organic matter, demonstrating moderate inhibition but maintaining BrO 3 − reduction capability. This study provides a cost-effective, magnetically recoverable, and noble-metal-free photocatalyst with improved charge separation efficiency and recovery feasibility, offering practical potential for BrO 3 − mitigation in drinking water treatment.
✓ 已验证
产品关联
DOI
高影响因子
TOXICOLOGY AND APPLIED PHARMACOLOGY
·
2025
·
IF 3.4
Yanan Xia,Lihua Feng,Yuzhi Lan,Xiangxiang Chen,Xiaomin Tang,Hengyi Xu,Yang Liu
Children's daily exposure to titanium dioxide nanoparticles (TiO₂ NPs) poses significant risks to the developing testes, yet few studies have examined their impact on young testicular growth. Given ghrelin's established antioxidant and testis-protective effects in animal models, we hypothesized that it could mitigate TiO₂ NPs–induced damage. In this first systematic investigation of young testicular responses, three-week-old male rats received oral gavage of TiO₂ NPs (100, 200, or 400 mg/kg), followed 30 min later by intraperitoneal ghrelin (50 mg/kg) for four weeks. Exposure to TiO₂ NPs disrupted seminiferous tubule architecture and reduced serum levels of key developmental and sex hormones, including IGF-1, FSH, LH, and testosterone. Mechanistically, TiO₂ NPs activated the ROS/AMPK/mTOR signaling pathway, resulting in a marked reduction of SOD, CAT, and GSH activities and the induction of oxidative imbalance, while simultaneously upregulating the autophagy protein ULK1 and autophagy-related genes to trigger excessive autophagy, ultimately compromising testicular architecture and function. We further assessed ghrelin's protective efficacy against TiO₂ NPs-induced reproductive injury in young rats, demonstrating that ghrelin inhibited the ROS/AMPK/mTOR signaling pathway, attenuated oxidative stress, and suppressed excessive autophagy, thereby mitigating testicular injury. These findings represent the first evidence of the developing testicular heightened vulnerability to TiO₂ NPs toxicity and underscore ghrelin's potential as a novel protective intervention. Our study provides new insights into the reproductive toxicology of engineered nanoparticles and supports targeted strategies to safeguard pediatric reproductive health.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Di Li,Qin Li,Yimeng Zhou,Qiong Zhang,Qianjin Ye,Ran Yang,Deli Jiang
Steering selectivity in photocatalytic conversion of CO2, especially toward deep reduction products, is vital to energy and environmental goals yet remains a great challenge. In this work, we demonstrate a facet-dependent photocatalytic selective reduction of CO2 to CH4 in Cu-doped TiO2 catalysts exposed with different facets synthesized by a topological transformation from MIL-125 (Ti) precursors. The optimized round cake-like Cu/TiO2 photocatalyst mainly exposed with the (001) facet exhibited a high photocatalytic CO2 reduction performance with a CH4 yield of 40.36 μmol g–1 h–1 with a selectivity of 94.1%, which are significantly higher than those of TiO2 (001) (4.70 μmol g–1 h–1 and 52.6%, respectively), Cu/TiO2 (001 + 101) (18.95 μmol g–1 h–1 and 69.6%, respectively), and Cu/TiO2 (101) (14.73 μmol g–1 h–1 and 78.9%, respectively). The results of experimental and theoretical calculations demonstrate that the Cu doping dominating the promoted separation and migration efficiencies of photogenerated charges and the preferential adsorption on (001) facets synergistically contribute to the selective reduction of CO2 to CH4. This work highlights the significance of synergy between facet engineering and ion doping in the design of high-performance photocatalysts with respect to selective reduction of CO2 to multielectron products.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）