JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Xuehan Xiao,Zongxue Yu,Ximei Zhu,Juan Wang,Qingcan Xiang
Microwave synthesis was taken to synthesis A-SEP@TiO 2 which has a steady chemical property. The A-SEP@TiO 2 composite materials and GO (with different proportion)were mixed and then pumped on commercial PVDF membranes to filter. Finally, the composite membrane A-SEP@TiO 2 /GO was obtained Under electrostatic self-assembly. Due to the superhydrophilicity and underwater super hydrophobicity of the surface of A-SEP@TiO 2 /GO membrane, A-SEP@TiO 2 /GO composite has shown great potential in the field of oil in water. The separation rates of four different emulsions (petroleum ether, toluene, Mesitylene, n-hexane) are all above 90%. With the steady chemical properties, A-SEP@TiO 2 /GO composite membrane is able to separate oil from water in harsh environment in long-run. After being immersed in 1 mol/L acid and alkali salt solution for one month respectively, all the sample membranes showed a better stability than commercial PVDF membranes. Also, the oil and water removal flux of A-SEP@TiO 2 /GO composite membrane only decreased by less than 10%, and that was why the composite membranecan can still maintain good cleaning performance even after ten times’ repetition of experiments,. Moreover, the membrane could efficiently remove dyes and heavy metal ions. Therefore, it has a great application prospect in complex water environment treatment.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2023
·
IF 3.5
Lin Wang,Dehua Ma,Chonghe Xu,Luyi Zhu,Yadong Lv
In this study, we successfully fabricated TiO 2 /SiO 2 ceramic nanofibrous membranes with different molar ratios using a combination of electrospinning and sol-gel technology. The resulting nanofibers were composed of amorphous SiO 2 and fine-grained anatase; the amorphous SiO 2 served as a lubricating zone and refined the rutile grains in the nanofiber structure. The hybrid nanofibrous membranes exhibited exceptional mechanical properties: the highest average tensile strength was 3.22 ± 0.98 MPa, which is threefold higher than that of the TiO 2 nanofibrous membranes. Consequently, the TiO 2 /SiO 2 nanofibrous membranes withstood stretching, bending, folding, and compressing processes without breaking. Furthermore, the average reflectance of the TiO 2 /SiO 2 nanofibrous membranes exceeded 89.57% in the range of 500–2500 nm, and their thermal conductivity at room temperature was below 0.0310 W·m − 1 K −1 . The flexible and robust ceramic materials have significant potential for various applications such as thermal insulation, flexible energy, and wearable electronics.
研究领域:
材料科学
·
纳米技术
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Weicheng Cui,Hongye Bai,Jianpeng Shang,Fagen Wang,Dongbo Xu,Jinrui Ding,Weiqiang Fan,Weidong Shi
Constructing the high-performance photoanode is critical to improve photoelectrochemical (PEC) efficiency, but it is still an inevitable challenge to rationally fabricate the organic-inorganic hybrid-photoanode system. For the first time, we report a novel hybrid-photoanode built from ultrathin NiFe-MOF and TiO 2 by a sacrifice template method. The in-situ etch of NiFe-layered double hydroxide (LDH) on the surface of TiO 2 has been successfully realized in the coordination environment, for creating coordinately unsaturated metal sites on NiFe-MOF. The coordinately unsaturated metal sites could significantly promote the water oxidation kinetic , compared with conventional electrode/electrolyte interface. The photocurrent density of the NiFe-MOF/TiO 2 has reached about 3.35 times of bare TiO 2 at 1.23 V (vs. RHE), and the incident photon to current conversion efficiency (IPCE) value has been improved up to 42% (at 390 nm). The significant augment of the charge injection ( η injection ) of 92.8% and charge separation ( η separation ) efficiency of 37.4% has also been exhibited. Moreover, NiFe-MOF/TiO 2 shows a long-term stability ( < 10% decay) after 4 h of continuous illumination. This work provided a novel and rational strategy about the integration of the inorganic semiconductor and organic MOF , which can provide a new insight into understanding MOF-based catalysts for PEC water splitting.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Hui Kang,Quan Shao,Luming Li,Yanlin Zhang,Xin Xiao,Yuefeng Liu
The gas-inducing strategy has proven highly effective in constructing high-density oxide interfaces. In this study, we utilized CO 2 hydrogenation reaction to induce the spontaneous dispersion of In 2 O 3 species on the surface of TiO 2 , forming numerous InO x /TiO 2 interfaces. The 2 %In 2 O 3 /TiO 2 catalyst demonstrated a 33-fold enhancement in reverse water-gas shift reaction (RWGS) performance after dispersion. Multi-technique characterization revealed that H 2 in the reactants reduced In 2 O 3 to partially reduced states (In +(3-x) ), which were more prone to migration. The spontaneous dispersion was not solely driven by the strong interaction (anchoring) ability of the support for In 2 O 3 species. Further mechanistic studies showed that the high-density InO x /TiO 2 interface formed via spontaneous dispersion significantly promoted the formation of formate species during CO 2 hydrogenation, which decomposed into CO at lower temperatures (297 °C), thereby improving catalytic performance. This work highlights the potential of atmosphere-induced structural evolution in catalysis, underscoring the importance of a comprehensive analysis of the activation, migration, and anchoring mechanisms, as well as the catalytic promotion principles of the induced structure.
研究领域:
催化化学
·
材料科学
·
表面科学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 7
·2443-2456
·
IF 2.2
Li Keyu,Liang Miaoqing,Zhang Mei,Nie Jinmei,Bao Lihong
In this study, a dye-sensitizing graphene/TiO 2 (DTG) based photocatalytic composite film (TPU-DTG) was developed to address the challenging recovery of graphene photocatalyst powder from treated sewage. The composite film was created by incorporating self-made dye-sensitizing graphene/TiO 2 onto an electrospun polyurethane film using electrostatic spraying technology. The structure and morphology of the composite film were analyzed using Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and X-ray diffraction (XRD). Additionally, the tensile properties and thermal stability of the composite film were examined. X-ray diffraction (XRD) analysis indicated the presence of the diffraction peak of the DTG 101 crystal plane. SEM observation of TPU-4%DTG showed that the photocatalytic nanoparticles were evenly dispersed on the fiber membrane without visible agglomeration. TPU-4%DTG presented a maximum fracture stress of 17.2128 N and an elongation at a break of 335.43%. The photocatalytic performance study revealed that TPU-4%DTG was capable of eliminating over 99% of methylene blue (MB) within 10 h, and even after five cycles of photocatalytic experiments, the removal rate of MB remained above 90%.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 100
·期 1
·015948
·
IF 2.6
Fucheng Yu,Zengguang Huang,Jinghong Zhang,Sihua Zhong
Cu3BiS3 has been considered as an attractive photovoltaic material due to its suitable bandgap, excellent photoelectric properties, abundant component elements and low toxicity. However, most of the reported Cu3BiS3 solar cells contain toxic components in other functioning layers such as CdS in electron-transport layers (ETLs). In this study, the Cu3BiS3 thin films were prepared by spin-coating method. We find that the CuCl concentration in precursor solutions has influences on both the optical bandgap and grain size of the Cu3BiS3 thin films, thus affecting the performance of solar cells. The optimal CuCl concentration is 0.91 M. Besides, Al doped TiO2 (ATO) and MoOx films are employed as ETLs and hole-transport layers (HTLs) respectively, constructing a totally non-toxic thin film solar cell. Moreover, it is demonstrated that the ratio (RAl:Ti) of Al source (Aluminum nitrate nonahydrate) to Ti source [Titanium diisopropoxide bis(acetylacetonate)] in the precursor solution of ATO and the thickness of MoOx have significant influences on solar cells. Moderate Al doping in ATO, e.g. RAl:Ti=1:50, can produce oxygen vacancies and accelerate the interfacial charge transfer, thus resulting in the increased short-circuit current density and fill factor. With the optimized Cu3BiS3 absorber, ETL and HTL, improved cell performances are observed comparted to the spin-coated Cu3BiS3 counterparts with CdS as ETLs in literature.
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 Energy
·
2012
·
IF 0
Chenbo Wang,Zifei Jiang,Lin Wei,Yanxue Chen,Jun Jiao,Micah Eastman,Hong Liu
We combine CdS semiconductor quantum dots and single-crystalline rutile TiO 2 nanorod arrays to produce a practical quantum dot sensitized solar cell . A facile wet-chemical approach was implemented for growth of this CdS@TiO 2 architecture. Rutile TiO 2 nanorod arrays with lengths of 1–2 μm and diameters of 40–60 nm were synthesized on fluorine-doped tin oxide glass by a hydrothermal process in a titanium tetrachloride precursor solution . CdS quantum dots with a size of 5–10 nm were deposited onto a TiO 2 nanorod surface using an ultrasonic-assisted chemical bath deposition method . The resulting CdS quantum dots and TiO 2 nanorods formed a type-II heterojunction and showed increased absorption over visible light range. Incident photon-to-current conversion efficiencies (IPCE) as high as 85% and power conversion efficiencies of 2.54% were obtained using a polysulfide electrolyte.
研究领域:
材料科学
·
纳米技术
·
光伏技术
✓ 已验证
DOI
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Jian Zhang,Yuanchun Li,Congze Liu,Chuntao Zhu,Chen shao,Yue Zhao
Semiconductor photo-electrocatalytic technology is considered as an efficient and environmentally friendly wastewater treatment and energy production technology. TiO 2 NTs is widely used in the field of photoelectricity catalysis because of its chemical stability and good recycling. In this paper, g-C 3 N 4 and Ag nanoparticles were deposited on the surface of TiO 2 NTs by solid-phase sublimation and electrodeposition method to prepare Ag/g-C 3 N 4 /TiO 2 NTs composite photo-electrocatalytic materials. The Ag/g-C 3 N 4 /TiO 2 NTs composites showed significant photo-electrocatalytic activity compared with the single component materials. The mechanism of enhanced catalytic activity is that the tight interface formed between Ag, g-C 3 N 4 and TiO 2 NTs, facilitating the photoinduced electron migration from g-C 3 N 4 to TiO 2 NTs and inhibiting the recombination of carrier pairs under the cooperative mechanism of photoelectric catalysis. The results of five cycle experiments show that Ag/g-C 3 N 4 /TiO 2 NTs has good stability. LC-MS and ECOSAR analysis results indicate that Ag/g-C 3 N 4 /TiO 2 NTs photo-electrocatalytic system can be safely used for wastewater degradation treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 18
·3953-3959
·
IF 5.686
Zhiming Zhou,Hongyan Jia,Yong Guo,Yangang Wang,Xiaohui Liu,Qineng Xia,Xi Li,Yanqin Wang
Graphical Sulfates : The introduction of sulfates into TiO 2 supported Pt-WO x catalyst greatly improves the dispersion of Pt and WOx species, increases the acid amount and inhibits the leaching of Pt and WO x species, resulting in dramatically promoted catalytic activity and stability for glycerol hydrogenolysis to 1,3-PDO and n-PO with 93 % total yield. Pt-WO x based catalysts were widely investigated and showed high industrial application potential for glycerol hydrogenolysis. Further improving the catalytic activity and stability of the Pt-WO x based catalysts is important. Herein, we modified the TiO 2 supported Pt-WO x catalyst with sulfate doping and employed for the glycerol hydrogenolysis. The introduction of sulfates dramatically promoted the catalytic activity and stability of the Pt/W/Ti catalyst in glycerol hydrogenolysis. Sulfates-doped Pt/W−S/Ti achieved 100 % conversion of glycerol, with 36 % selectivity to 1,3-PDO and 57 % selectivity to n-PO at 120 °C and 4 MPa, while the conversion over Pt/W/Ti only reached 57 %. Moreover, Pt/W−S/Ti offered 22.5 times more glycerol conversion (90 %) than Pt/W/Ti (4 %) for the second run. The much higher activity of the Pt/W−S/Ti was ascribed to the better dispersion of Pt and WO x species and more Brønsted acid amount. The enhanced stability of Pt/W−S/Ti was attributed to its strong anti-leaching ability after sulfate doping.
研究领域:
催化化学
·
工业化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2019
·Vol. 66
·期 7
·740-747
·
IF 1.188
Chenghao Mo,Huixian Wei,Tongjun Wang
Self-doped TiO 2 nanotube array (DTNA) electrodes were fabricated through anodic oxidation combined with cathodic reduction. The morphology and structural features of pristine TiO 2 nanotube arrays and DTNA electrodes were studied through scanning electron microscopy, X-ray diffractometry, and X-ray photoelectron spectroscopy. An accelerated life test was used to test the electrode service lifetime and thus the electrode's stability. The service lifetime of the DTNA electrode prepared at constant 40 V for 6 hr was approximately 338.7 hr at constant 1 mA/cm 2 in a 1 M NaClO 4 solution. Methyl orange (MO) was employed as the degradation probe for measuring electrochemical oxidation performance. The color removal rate of 200 mg/L MO of the DTNA electrode (85.2% at 1 mA/cm 2 ) was greater than that of the Ti/IrO 2 electrode (31.1% at 1 mA/cm 2 ). The larger the surface area of the DTNA electrode is, the more conductive the electrode is for the degradation of organic substances. Organic degradation on the DTNA electrode occurred primarily through an indirect pathway (producing [∙OH]).
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 32
·期 6
·e4351
·
IF 3.581
Qingqing Lu,Wenhui Peng,Suhang Xun,Minqiang He,Ruliang Ma,Wei Jiang,Wenshuai Zhu,Huaming Li
The aggregation of nanoparticle catalysts is one of the main problems in catalytic reactions. In this study, a series of TiO 2 nanoparticle catalysts with various dispersions were prepared and applied in the catalytic oxidation of dibenzothiophene (DBT) systems. Compositions and structures of the as-prepared samples were analyzed by means of wide-angle X-ray diffraction, Raman and X-ray photoelectron spectroscopies. The dispersions of TiO 2 nanoparticles were controlled by calcining at various temperatures and verified using transmission electron microscopy. It was found that the activities of TiO 2 nanoparticles in the catalytic oxidation of DBT were positively correlated with the dispersions. TiO 2 nanoparticles calcined at 500 °C (500-TiO 2 ) showed the best catalytic activity and the oxidation of DBT reached 99.8% under mild conditions. Based on the results of GC–MS analysis, radical trapping experiments and electron spin resonance spectra, • O 2 − radicals were proved to be the main active species in the oxidation process, and a mechanism is proposed. Meanwhile, the recycling performance of 500-TiO 2 was investigated, and no obvious decrease was observed after six recycles.
研究领域:
材料科学
·
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymer-Plastics Technology and Materials
·
2019
·
IF 0
Linshuang Li,Yong Xu,Jianfei Che,Liu Xiaohong,Wei Zhao,Zhifeng Ye
A series of white fluorinated polyimide/TiO2 composite films were prepared by a solution mixing method. They showed high tensile strength beyond 95.1MPa and excellent insulting property with surface and volume resistances exceeding 1.9 × 1011Ω and 2.3 × 1012 Ω cm, respectively, coupled with water absorptions below 1.1%, water contact angles up to 95.9 and whiteness beyond 58.5. It was found that their optical transparency decreased dramatically with the increasing doping of TiO2. The thermal degradation of pure fluorinated polyimide (FPI) and representative polyimide/TiO2 composite film with 5 wt% of TiO2 (PI/TiO2-5 wt%) was also studied.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）