APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ning Wan,Zipeng Xing,Junyan Kuang,Zhenzi Li,Junwei Yin,Qi Zhu,Wei Zhou
In-situ oxygen vacancy-mediated C-N-S-tridoped single crystal black TiO 2 (B) nanorods are smoothly manufactured. The sample preparation is divided into two steps, first of all, a simple hydrothermal process, followed by an in-situ solid-state chemical substitution method with calcination at 500 °C. We have a number of representations of the catalyst such as crystallinity, morphological structure, etc. by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–vis diffuse reflectance spectroscopy, respectively. This b-C-N-S-TiO 2 (B) has the advantages of Oxygen Vacancy, single crystal structure of nanorods, Ti 3+ self-doping, C-N-S-tridoped, so this sample band gap is narrow. Moreover, through the reduction of phenol and Cr(VI), we know the photocatalytic performance of the b-C-N-S-TiO 2 (B), the reduction efficiency of phenol and Cr(VI) is ∼6.1 times and ∼7 times of no doping samples, respectively, under visible light illumination. The predominant photocatalytic performances because of the synergetic action of Ti 3+ self-doping, C-N-S-tridoped, oxygen vacancy, and the 1D single crystal B phase nanostructure, favoring the separation and transportation of photogenerated charge carriers and the visible light utilization.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 38
·7554-7559
·
IF 4.726
Shupei Zhang,Guifang Xu,Lingshan Gong,Hong Dai,Yilin Li,Zhensheng Hong,Yanyu Lin
TiO2-B nanorods, with excellent properties including large specific surface area, open structures with significant voids, and continuous channels, were explored for the first time in the photoelectrochemical biosensing field. To reduce the destructive effect of UV light on biomolecules, dopamine was introduced onto the TiO2-B nanorod surface through the coordination of dopamine to the undercoordinated titanium atoms of the TiO2-B nanorods, which makes the complex a promising matrix for subsequent biosensing. Furthermore, concanavalin A as a recognition element was attached onto the TiO2-B nanorod/dopamine modified electrode surface by virtue of covalent interaction between concanavalin A and dopamine. Accordingly, a new competitive-like non-enzymatic photoelectrochemical biosensor was established by using glucose labeled SiO2 nanospheres of fixed concentration as photoelectrochemical signal inhibitors competing with target glucose of various concentrations for reaction with concanavalin A. Moreover, this ultrasensitive biosensor with excellent analytical performance was successful applied to noninvasive glucose determination in human saliva. Promisingly, the successful application of TiO2-B nanorods in this research provides a new consideration in the selection of excellent photoactive materials for photoelectrochemical sensing.
研究领域:
光电化学
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生物传感器
·
纳米材料
·
葡萄糖监测
✓ 已验证
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2018
·Vol. 8
·期 19
·4934-4944
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IF 5.365
Jinghua Liu,Tong Ding,Hao Zhang,Guangcheng Li,Jinmeng Cai,Dongyue Zhao,Ye Tian,Hui Xian,Xueqin Bai,Xingang Li
Herein, we report the high performance of thermally reduced Pt/TiO2(B) catalysts for the catalytic oxidation of CO. Our findings show that through hydrogen spillover from Pt to TiO2, surface-engineered defects of oxygen vacancies are “constructed” on the TiO2 support during the reduction process, thus generating active surface-adsorbed oxygen species. With an increase of the reduction temperature, the TiO2(B) phase gradually transforms to the anatase phase, which takes place from the bulk to the surface of TiO2, and is eventually completed at 700 °C. Compared with the anatase phase, the oxygen vacancies are more easily formed on the TiO2(B) phase, and the latter has much stronger interactions with Pt, as well. As the reduction temperature increases, the metal–support interaction between Pt and TiO2(B) is strengthened. Meanwhile, we simultaneously observe an increase in the dispersion of Pt, the proportion of Pt0 and the adsorbed oxygen species on the surface. Our findings reveal that for thermally reduced Pt/TiO2 catalysts, surface-adsorbed oxygen and Pt0 are active species for the catalytic oxidation of CO. Among the thermally reduced catalysts, H-600 shows the highest catalytic activity because it has the largest amount of active Pt0 sites and surface-adsorbed oxygen species. In addition, it shows high water vapor resistance.
研究领域:
催化化学
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材料科学
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环境化学
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表面科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Xueying Cheng,Renquan Guan,Yunning Chen,Yingnan Sun,Qingkun Shang
A Z-scheme heterojunction photocatalyst (TiO 2 (B)/BiOCl 0.7 I 0.3 -P) was constructed (B: bronze phase; BiOCl 0.7 I 0.3 : a solid solution of BiOCl and BiOI in a molar ratio of 7:3; P: polyvinylpyrrolidone). The open channels parallel to the b-axis between the axial oxygen atoms in the bronze TiO 2 , the unique layered structure of BiOCl and the excellent light absorption characteristics of BiOI create excellent conditions for the absorption and utilization of light, the separation and transmission of photo-generated carriers in the photocatalytic process. TiO 2 (B)/BiOCl 0.7 I 0.3 -P can almost completely degrade and mineralize fomesafen within 20 min, and the environmental toxicity of the degradation products is significantly reduced. Combined with high-resolution mass spectrometry, the degradation pathway of fomesafen was proposed. In addition, TiO 2 (B)/BiOCl 0.7 I 0.3 -P can also quickly and effectively degrade phenol and acetaminophen, indicating that it has good universality. To eliminate the harm caused by various herbicides to the ecological environment, photocatalytic technology will play an increasingly important role.
研究领域:
环境科学
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材料科学
·
化学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2012
·Vol. 24
·期 24
·3201-3204
·
IF 13.877
Shaohua Liu,Haiping Jia,Lu Han,Jiulin Wang,Pengfei Gao,Dongdong Xu,Jun Yang,Shunai Che
Graphical Hierarchical porous TiO 2 –B with thin nanosheets is successfully synthesized. TiO 2 –B polymorph ensures fast insertion of Li-ion due to its pseudocapacitive mechanism. The thin nanosheet walls with porous structure allow exposure to electrolytes for facile ionic transport and interfacial reaction. The joint advantages endow this material with high reversible capacity, excellent cycling performance, and superior rate capability.
研究领域:
材料科学
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电化学
·
纳米科技
·
能源存储
·
无机非金属材料
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电极材料
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锂离子电池
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Zhu Mengting,Tonni Agustiono Kurniawan,Ram Avtar,Mohd Hafiz Dzarfan Othman,Tong Ouyang,Huang Yujia,Zhang Xueting,Tjandra Setiadi,Iswanto Iswanto
We test the feasibility of TiO 2 (B)@carbon composites as adsorbents, derived from wheat straws, for tetracycline (TC) adsorption from aqueous solutions. Hydrochar (HC), biochar (BC), and hydrochar-derived pyrolysis char (HDPC) are synthesized hydrothermally from the waste and then functionalized with TiO 2 (B), named as ‘Composite-1′, ‘Composite-2′, and ‘Composite-3′, respectively. A higher loading of TiO 2 (B) into the HC was also synthesized for comparison, named as ‘Composite-4′. To compare their physico-chemical changes before and after surface modification, the composites are characterized using FESEM-EDS, XRD , BET, FRTEM, and FTIR. The effects of H 2 O 2 addition on TC removal are investigated. Adsorption kinetics and isotherms of TC removal are studied, while TC adsorption mechanisms are elaborated. We found that the Composite-4 has the highest TC removal (93%) at pH 7, 1 g/L of dose, and 4 h of reaction time at 50 mg/L of TC after adding H 2 O 2 (10 mM). The TC adsorption capacities of the Composite-1 and Composite-4 are 40.65 and 49.26 mg/g, respectively. The TC removal by the Composite-1 follows the pseudo-second order. Overall, this suggests that converting the wheat straw into HC and then functionalizing its surface with TiO 2 (B) as a composite has added values to the waste as an adsorbent for wastewater treatment .
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Xinlu Li,Yin Liu,Xinlin Zhang,Cong Yao,Ronghua Wang,Chaohe Xu,Juan Lei
A porous spherical hybrid of TiO 2 (B)/anatase entwined by graphene nanoribbons (GNRs) was synthesized by a facile and scalable method. The entwining of GNRs can adhere on the surface of TiO 2 by electrostatic interactions and prevent TiO 2 nanoribbons from self-scrolling to nanotubes , facilitating large lithium storage and high rate capability. The TiO 2 /GNRs nanocomposite exhibited high rate capability in galvanostatic charge-discharge experiments, providing a capacity of 131 mAh g −1 with a coulombic efficiency of 99.2% at a charge rate of 10C (1 C = 335 mA g −1 ) over 1400 cycles. The appealing electrochemical performance can be attributed to the synergistic effect of TiO 2 nanoribbons entwined by GNRs.
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
FUEL
·
2022
·
IF 8.035
Xu Li,Long Yan,Ziyue Liu,Yuhe Liao,Longlong Ma
Catalytic hydrodeoxygenation (HDO) of oxygenated compounds is essential for chemical refining, which is always carried out under high temperature, hydrogen pressure or/and strong acids. Herein, we developed a novel Pt/TiO 2 (B) catalyst for the ambient HDO process. With the modified organic functional TiO 2 (B) nanosheets, the catalytic activity of Pt/TiO 2 (B) was significantly improved. Through the synergistic effect of highly dispersed Pt species and TiO 2 (B) supports, phenol was efficiently converted into cyclohexane and concomitant cyclohexanol under 50 °C and atmospheric hydrogen without extra acid. The characterizations of catalysts showed that the introduction of organic functional groups not only led to the formation of highly dispersed Pt species, but was also conducive to the yielding of key HDO intermediates. Due to the low C O bond energy of enol intermediates, the HDO of phenol could be carried out at mild conditions through the implementable C O bond cleavage of enol intermediates. This study provides a new understanding of the green HDO process and a novel approach for HDO catalyst development.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Nan Zhou,Yufan Wu,Qing Zhou,Yiran Li,Shihan Liu,Hongbo Zhang,Zhi Zhou,Mao Xia
Silicon monoxide (SiO) is regarded as a great potential anode material for high-energy lithium-ion batteries (LIBs) owing to the high theoretical specific capacity (2650 mAh g −1 ), low voltage platform, eco-friendly and rich reserves. However, the particle pulverization , induced by large volume change during (de)lithiation, can result in the capacity degrading significantly. As we all know, it is a good strategy that using TiO 2 to modify the SiO-based anode. TiO 2 can serve as rigid outer layer to keep the structural integrity. In addition, the electrochemical performances of monoclinic TiO 2 (B) are better than anatase and rutile TiO 2 . Therefore, compositing with TiO 2 (B) is an admissible method to enhance the electrochemical properties of SiO-based materials. And the pretreated-SiO/TiO 2 (B) composites (abbreviated as p-STB) are prepared by hydrothermal treatment at 180 °C for 12 h and then calcined at 325 °C for 2 h. In this paper, p-STB-1 and p-STB-2 are prepared that the weight ratios p-SiO and TiO 2 (B) are 4:1 and 3:1, respectively. The structure and components of composites are also performed on X-ray diffraction (XRD), Fourier transform infrared reflectance (FT-IR) spectroscopy, scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). For p-STB, TiO 2 (B) is mainly covered on the surface of pretreated SiO (p-SiO). The Li-ion diffusion coefficients of as-prepared materials are calculated by cyclic voltammetry and electrochemical impedance spectroscopy . The electrochemical test results suggest that the p-STB-1 has batter cycling performance (730 mAh g −1 after 100th cycle) and admirable rate capacity (450 mAh g −1 under 3.2 A g −1 ). The modified method, which was compositing with TiO 2 (B), is beneficial to the commercialization of SiO-based materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Caiyun Sun,Guangsheng Huang,Chaohe Xu,Lingjie Li,Aitao Tang,Xiaoyuan Zhou,Jingfeng Wang,Fusheng Pan
Aqueous rechargeable Mg-ion batteries (ARMIBs) are promising for large-scale energy storage due to the aqueous electrolyte's high safety and low cost. However, the aqueous electrolyte's narrow electrochemical stability window (ESW) significantly hinders the development of ARMIBs, especially the compatibility of electrolytes with anode materials . We first report a TiO 2 (B) anode for ARMIBs that has high compatibility with wide potential aqueous electrolytes (ESW: ∼3.66 V), thus resulting in a low magnesiated potential (∼0.95 V vs. Mg 2+ /Mg), highest capacity (50 mA g −1 : 247.7 mAh g −1 ) reported for Ti-based oxide anodes in aqueous metal-ion batteries thus far, and fast Mg 2+ diffusion kinetics (∼3.49 × 10 −11 cm 2 s −1 ). When the magnesiated TiO 2 (B) (Mg x TiO 2 (B)) anode is paired with V 2 O 5 , the Mg x TiO 2 (B)||V 2 O 5 full cell can deliver high voltage (2.5 V), high capacity (100 mA g −1 : 64.4 mAh g −1 , based on the total electrode mass) and high cycling stability with no capacity decay after 200 cycles at 100 mA g −1 . The versatile intercalation chemistry of TiO 2 (B) observed here is expected to spur the development of high-voltage ARMIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 12
·8337-8344
·
IF 1.354
Guo Min,Yang Lu,Chen Jia,Zhang Jun,Su Haijun,Liu Lin,Xie Keyu
The relatively small electron diffusion coefficient and high charge recombination rate of TiO2 nanoparticle (NP) film limit charge collection in TiO2 NP based dye-sensitized solar cells (DSSCs). Herein, ultralong bending TiO2 (B) nanowires (NWs) were
introduced to TiO2 NP photoanode and expected to modify electron transport of DSSCs. The TiO2 (B) NWs/TiO2 NP composite structure was prepared by a facial process combining the stirring hydrothermal method with mechanical mixing method. When the composite structure
was applied to DSSCs, the rapid electron transport pathway was formed in photoanode, which was clarified by the small electron transport resistance and long electron diffusion length, improving the charge collection efficiency. Moreover, the scattering effect of TiO2 (B) NWs could
enhance the light harvesting, and thus improve the power conversion efficiency (PCE) of DSSCs. The excellent electronic and optical characteristics of TiO2 (B) NWs yield the maximum enhancement of PCE (36.4%) when 50% (wt.%) TiO2 (B) NWs was integrated into TiO2
NP based DSSC. The work provides new insights into the design and tailoring nanowires to enhance the PCE of DSSCs for practical applications.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
能量转换
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2017
·
IF 3.648
Dun Fu,Yujia Huang,Xueting Zhang,Tonni Agustiono Kurniawan,Tong Ouyang
This study investigates the impacts of hydrogen peroxide (H 2 O 2 ) addition on the removal of tetracycline (TC) from aqueous solution by TiO 2 (B) nanosheets (NSs) and compares the changes of its characteristics due to adsorption treatment. The morphology and textural properties of the TiO 2 (B) NSs structure before and after the treatment were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). Effects of pertinent parameters such as dose of TiO 2 (B) and/or H 2 O 2 concentration, initial adsorbate concentration, pH, and temperature on the TC adsorption by TiO 2 (B) NSs were examined. The adsorption mechanisms of TC by the integrated treatment of TiO 2 (B) NSs and H 2 O 2 are also presented. The results demonstrated that the integrated treatment of TiO 2 (B)-H 2 O 2 system had significantly improved the TC removal by 250% (with its adsorption capacity ( q max ) of 212.77 mg g − 1 ), as compared to that of the TiO 2 -H 2 O 2 system (paired t-test ; p ≤ 0.05) under the same optimum conditions (2 g L − 1 of TiO 2 (B) NSs; 20 mM of H 2 O 2 ; 0.1 g L − 1 of initial TC concentration). The enhanced TC adsorption by the integrated TiO 2 (B)-H 2 O 2 system not only is due to the H-bonding between the TC molecules and the –OOH groups formed on TiO 2 (B) surface, but it is also because of electrostatic interactions. Their adsorption isotherms followed the Elovich model and were also applicable to both the Langmuir and the Freundlich models. In spite of the adsorbent's promising performance, its treated effluents still could not meet the required TC effluent limit of < 62.5 μg L − 1 . This suggests that further subsequent treatment like biological processes is still necessary to completely remove the target pollutant from the wastewater samples.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）