INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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IF 4.084
Shanhu Liu,Yinxi Xu,Debabrata Chanda,Lei Tan,Ruimin Xing,Xiying Li,Liqun Mao,Nakata Kazuya,Akira Fujishima
Highly efficient and durable non-noble metal-based hydrogen evolution electrocatalysts are critical to advance the production of hydrogen energy via alkaline water electrolysis . Herein, we prepared a novel TiO 2 @WS 2 hybrid via a facile and scalable two-step hydrothermal strategy combined with selective etching. Benefited from acid-etched TiO 2 nanobelts with rough surface as substrate, ultrathin WS 2 nanosheets nucleated and vertically grew into few layers in the confined configuration with more exposed active edges. Furthermore, the partial incorporation of oxygen in WS 2 inherited from the remaining O–W bonds of tungsten precursor enhanced the electrical conductivity of the hybrid. Therefore, TiO 2 @WS 2 hybrid was proved to be efficient and durable electrocatalyst for hydrogen evolution in alkaline medium . Upon optimal conditions, the hybrid only required a small onset overpotential of 95 mV and a low overpotential of 142 mV at 10 mA cm −2 , superior to pristine WS 2 and TiO 2 . In addition, better cycling stability during the alkaline HER process was also obtained, indicating its capability in future practical application. The synthesis strategy presents a cost-effective approach to produce efficient WS 2 -based HER electrocatalyst for electrochemical water splitting.
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高影响因子
POLYMER COMPOSITES
·
2019
·Vol. 41
·期 3
·1013-1023
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IF 2.268
Fei Sun,Shih-Yu Huang,Hai-Tao Ren,Ting-Ting Li,Yue Zhang,Ching-Wen Lou,Jia-Horng Lin
This study uses PVDF, PAN, and coaxial electrospinning technique to build a core-sheath structure for TiO 2 @PVDF/PAN electrospun membranes. The resulting electrospun membranes are compared with traditional electrospun membranes in terms of photocatalysis and oil-water separation, which examines the influences of electrospinning fibrous structure. The test results show that the core-sheath structure provides TiO 2 @PVDF/PAN electrospun membranes with a large diameter, high strength, a rough surface, a high photocatalysis, and good oil-water separation. With PVDF as the sheath and PAN as the core, TiO 2 @PVDF/PAN electrospun membranes have a maximum strength of 8.96 MPa and exhibit 97% of rhodamine B pollutant after the exposure to the UV light. Moreover, the oil-water separation rate is 99% and an oil flux is 40 163.79 L·m 2 ·h −1 , and the membrane maintains a high flux after 10 cycles, which makes TiO 2 @PVDF/PAN electrospun membranes an important candidate for treating wastewater produced in industry and daily life.
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JOURNAL OF NANOPARTICLE RESEARCH
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2019
·Vol. 21
·期 10
·1-10
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IF 2.009
Jiang Xinde,Wang Zhenxi,Zhang Xiaohang,Jiang Guixian,Peng Yong,Xu Sheng,Cao Meng,Dai Xin,Liu Zuhan,Ma Jianye
A green bioreduction method was used to prepare highly efficient supported TiO 2 photocatalysts with bimetallic (Au-Ag) nanoparticles at room temperature using Cinnamomum camphora leaf extract as both the protective agent and reducing agent. The resulted Au-Ag/TiO 2 exhibits high photocatalytic activity toward the degradation of organic dyes. It was demonstrated that after some of the biomolecules were removed through ionic-liquid extraction and/or calcinations, the Au-Ag/TiO 2 photocatalyst exhibits significantly enhanced catalytic performance toward the degradation of methyl orange compared to the pristine untreated catalyst. As a result, 300 mL of 20 mg/mL methyl orange can be fully degraded in 30 min. These can be explained by the sufficient biomolecules could protect the nanoparticles stay in small size, but excess biomolecules played an unfavorable role in hindering the electron transportation during the catalytic reaction. The low-cost preparation, the high activity, together with the good stability and recyclability make this developed Au-Ag/TiO 2 a promising photocatalyst toward the degradation of wastewater.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Yongwei Cai,Qi Zhao,Xuejun Quan,Wei Feng,Qingkuo Wang
Superhydrophobic and superoleophilic meshes have attracted great attention in oil/water separating application. However, superhydrophobic surfaces are not only complicated in preparation but also easy to break in practical applications. In this paper, we prepared fluorine-free hydrophobic hexadecyltrimethoxysilane (HDTMS)-TiO 2 coated meshes with properties of cost-effectiveness, easy to manufacture, and high separation efficiency by a liquid phase deposition method. The surface topography , composition , and functional groups of the meshes were characterized by field emission scanning electron microscope (FE-SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Fourier transform microscopic infrared spectrometer (FT-IR) spectrum, respectively. A new gravity-driven oil/water separator was designed for the separation experiments. The separation efficiency of the hydrophobic HDTMS-TiO 2 coated meshes maintained over 97.8% after 35 separating cycles. This study indicated that the superhydrophobicity of the separating mesh was nonessential for the highly efficient oil-water separation. The fluorine-free hydrophobic HDTMS-TiO 2 coated meshes provided an economical and beneficial solution to treat industrial oily wastewater mixtures and environmental oil spills.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2019
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IF 5.589
Weie Wang,Qinqin Sang,Ming Yang,Juan Du,Libin Yang,Xin Jiang,Xiaoxia Han,Bing Zhao
Herein, a surface-enhanced Raman scattering (SERS) strategy based on semiconducting substrate was exploited for detection of several antibiotic residues both in ultrapure water system and in actual water system. The as-prepared Ag-TiO 2 (Ag synchronously deposited and doped TiO 2 ) nanoparticle SERS-active substrate can achieve high sensitive SERS detection for difloxacin hydrochloride, ciprofloxacin, enrofloxacin, danofloxacin and enoxacin (five widely used quinolone antibiotics) in actual water samples, and the detection limits are as low as 4.36 × 10 −12 , 7.08 × 10 −11 , 3.94 × 10 −11 , 3.16 × 10 −11 and 3.15 × 10 −10 mol/L, respectively. These detection limits are far below the maximum of residue limit (3.01 × 10 −7 mol/L) stipulated by the European Union. And, the desirable quantitative relationships can be obtained in a wide concentration range. The recoveries of five antibiotic residues from spiked actual water samples are found to be more than 80.8% with the relative standard deviations between 2.1% and 4.7%. Even, the proposed SERS method can accurately distinguish every antibiotic species from a mixed antibiotic residue sample with multiple antibiotics. And, Ag-TiO 2 nanoparticles can also serve as an efficient photocatalyst for photocatalytic degradation of these antibiotic residues, which provides a multi-functional platform for synchronous determination and degradation of antibiotic residues in real environment.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Mengnan Nie,Chao Zhou,Weiwei Feng,Changhui Xin,Xin Yu,Qian Li
Self-doped Ti 3+ -TiO 2 and amorphous ZnS layers-coated Ti 3+ -TiO 2 nanostructures were successfully fabricated for via a calcination-ultrasonic synthesis strategy for organic pollutant degradation under visible-light illumination. The experimental results revealed that the synthesized Ti 3+ -TiO 2 clusters displayed efficient visible-light absorption and photocatalytic performance. It was also found that amorphous ZnS layers were formed on the coral-like Ti 3+ -TiO 2 clusters via an ultrasonic synthesis method, and the strongly combined interfaces greatly boosted the charge separation between ZnS layers and self-doped Ti 3+ -TiO 2 clusters. The synthesized Ti 3+ -TiO 2 @ZnS-15% heterojunction presented the highest photocatalytic activity with a rate constant of 0.03197 min −1 , approximately 9.87 times of commercial TiO 2 . In addition, the prepared Ti 3+ -TiO 2 @ZnS composites also exhibited highly boosted photocatalytic performance towards ciprofloxacin and tetracycline degradation under visible-light illumination compared with those of commercial TiO 2 , Ti 3+ -TiO 2 , and ZnS samples. Finally, the norfloxacin degradation pathways and visible-light photocatalytic mechanism over nanostructured Ti 3+ -TiO 2 @ZnS heterojunctions were suggested.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Xiaohong Hu,Jin Yuan,Zhuang Liu,Jinxing Mi,Houlin Wang,Shangchao Xiong,Jianjun Chen
TiO 2 crystal phase regulates oxide-support interaction strength in CeO 2 /TiO 2 . • Rutile-derived interfaces show stronger Ce-to-Ti charge transfer and higher Ti 3+ fractions. • CeO 2 /TiO 2 -R has lower oxygen-vacancy formation energy and enhanced oxygen activation. • 90% toluene conversion occurs approximately 70 °C lower on CeO 2 /TiO 2 -R than on CeO 2 /TiO 2 -A. Controlling the oxide–oxide interface is crucial for designing efficient oxide catalysts for volatile organic compound (VOC) oxidation, yet how the TiO 2 crystal phase regulates oxide-support interaction remains poorly understood. Here, CeO 2 supported on rutile (R) and anatase (A) TiO 2 was investigated as a model system for toluene oxidation. CeO 2 /TiO 2 -R exhibits markedly higher activity than CeO 2 /TiO 2 -A, with the temperature required for 90% toluene conversion lowered by approximately 70 °C. High-resolution transmission electron microscopy and quasi- in situ X-ray photoelectron spectroscopy show that the rutile-derived CeO 2 /TiO 2 interface exhibits stronger interfacial coupling and more pronounced electron redistribution between CeO 2 and TiO 2 , accompanied by a higher Ti 3+ -related contribution under oxidative conditions. In situ electron paramagnetic resonance measurements, together with density functional theory calculations, reveal enhanced oxygen activation at the CeO 2 /TiO 2 -R interface, associated with a lower interfacial oxygen-vacancy formation energy and promoted lattice‑oxygen activation as well as reactive oxygen species generation. Temperature-programmed infrared spectroscopy further shows faster turnover of toluene-derived oxygenated intermediates on CeO 2 /TiO 2 -R, with benzyl alcohol, benzaldehyde, and benzoate species identified along the reaction pathway, supporting an enhanced Mars–van Krevelen oxidation pathway enabled by enhanced oxygen activation. This work highlights crystal-phase engineering of oxide supports as an effective strategy to regulate oxide–oxide interfacial redox chemistry and improve VOC oxidation performance. Download: Download high-res image (496KB) Download: Download full-size image
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高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2023
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IF 3.9
Lijie Li,Shuangqing Li,Gaohong He,Minqiang Jiang,Zixuan Xu,Wenjun Zhang
As one of the essential treatments for bilirubin removal in clinical, hemoperfusion of bio-sorbents required efficacy, efficiency and biosafety. Dopamine of biocompatibility and spontaneous polymerization was herein proposed for the bilirubin-imprinted adsorptive polymers of selectivity, doped with TiO 2 of adsorptivity and Fe 3 O 4 as fixed magnets. Via electrostatic reaction and hydrogen bonding, the magnetic sorbents composed of polydopamine doped with TiO 2 removed bilirubin of 263.5 mg·g −1 non-homogeneously during 240 min. With a competitive adsorption coefficient (t N ) of 10.4, the magnetic sorbents also exhibited the decent blood compatibility of acceptable hemolysis ratio and plasma recalcification time. Prospectively, the TiO 2 -doped bilirubin-imprinted PDA cored with Fe 3 O 4 was potentially for bilirubin selective removal via hemoperfusion in clinic.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 46
·17483-17499
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IF 4.5
Tang Qin,Chen Hui,Shen Jun
The flower-like MoS 2 /cotton fiber-derived TiO 2 (MoS 2 /CF–TiO 2 ) composites were successfully prepared through the bio-template method and hydrothermal reaction. The influence of TiO 2 morphology and content on the electromagnetic wave (EMW) absorption performance of the composites was explored. The enhancement effect and mechanism of the heterostructure formed by MoS 2 and CF–TiO 2 on the EMW absorption performance were analyzed. The results showed that when CF–TiO 2 was added with a titanium-molybdenum atomic ratio of 2:1, the MoS 2 /CF–TiO 2 composites reached the minimum reflection loss (RL) of − 42.4 dB at 6.4 GHz when the thickness was 4.0 mm. The strong EMW absorption performance of MoS 2 /CF–TiO 2 composites could be attributed to the improvement of impedance matching. The good interface contact between the tubular CF–TiO 2 and flower-like MoS 2 not only increased the specific surface area of the material, but also greatly improved the conductivity of the material, enhancing the conduction loss and various polarization losses.
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高影响因子
Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Yahui Zhou,Xiaohua Cheng,Zijian Duan,Xin Liu,Huiyu Yang,Bo Deng
Black TiO 2 microspheres photocatalysts with high light absorption intensity and photosensitive activity were prepared by a simple two-step method of flame-assisted combustion hydrolysis of tetrabutylorthotitanate (TBOT) and NaBH 4 reduction. The black TiO 2 microspheres photocatalysts were characterized by XRD, TEM, XPS, EELS , and UV-Vis absorption spectroscopy . The results show that the reduced TiO 2 exhibits a unique core-shell composite structure with a large number of oxygen vacancies and defects in the outer layer due to Ti 3+ , which effectively reduces the band gap of the photocatalyst. Compared with the commercial P25 catalyst, B-TiO 2 (1:7) showed higher removal of carbamazepine (CBZ) under visible light and its photocatalytic activity was 1.7 times higher than that of P25. This high photocatalytic activity is due to the efficient separation of electron-hole pairs, creating a greater number of active species. B-TiO 2 (1:7) maintained high activity after five repeated cycles and achieved 89.7 % removal of CBZ.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 45
·21010-21023
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IF 3.3
Taoming Yu,Li Liu,Yuehui Wang,Shiwen Zhang,Lili Li,Ce Liang
The construction of photocatalysts with a Z-scheme heterojunction is considered to be a superior strategy for improving photocatalytic activity. In this study, a photocatalyst (PI/TiC/TiO2) with a Z-scheme heterojunction was fabricated, in which polyimide (PI) and TiO2 were used as the organic/inorganic semiconductor photocatalyst and TiC acted as the transmission bridge for electrons between PI and TiO2. In the self-made air flow photocatalytic reactor, the photocatalytic degradation efficiencies of organic dyes by PI/TiC/TiO2 increased with the increase of both the concentration and diffusion rate of O2. The degradation efficiencies of RhB and MB by PI/TiC/TiO2 reached 93.87% and 90.96%, respectively, within 90 min of visible light exposure, showing its outstanding photocatalytic performance. The mechanism analysis indicated that the Z-scheme heterojunction in PI/TiC/TiO2 facilitated the separation and migration of photoexcited charges while retaining stronger redox capabilities for charge carriers. This study provides an insight into the construction of visible light responsive organic/inorganic photocatalysts with Z-scheme heterojunctions for organic pollution treatment applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Hongying Li,Bicheng Zhu,Jian Sun,Haiming Gong,Jiaguo Yu,Liuyang Zhang
Compared to hydrogen production through pure water photocatalysis , the direct utilization of seawater for hydrogen production aligns better with the principles of sustainable development. Seawater, however, contains impurity ions like Na + and Cl − , which pose higher demands on photocatalysts . It is widely acknowledged that RuO 2 and TiO 2 demonstrate excellent stability in seawater . Consequently, this study focuses on the model system of RuO 2 -modified TiO 2 for investigating hydrogen production in simulated seawater. TiO 2 /RuO 2 nanofibers (NFs) were synthesized via a one-step electrospinning method, ensuring intimate contact between the two components. The hydrogen production activity of TiO 2 /RuO 2 NFs in simulated seawater nearly matches that in pure water. Remarkably, RuO 2 serves as an oxidation cocatalyst, effectively scavenging holes from the valence band of TiO 2 and enhancing the separation efficiency of electrons and holes. Interestingly, Cl − ions, similar to RuO 2 , contribute to reducing excess holes. This study lays the groundwork for future research into hydrogen production from seawater.
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