MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Rong Cheng,Xiaozhen Fang,Yulin Wang,Chengzhen Gu,Xinyu Zheng,Mingwei Yang
The electrooxidation of dopamine (DA) and uric acid (UA) suffers from significant signal overlapping due to their similar oxidative potentials. In this study, a composite material consisting of carbon film coating on the surface of anatase TiO 2 (TiO 2 @C) is proposed for the simultaneous detection of DA and UA. The synergistic effect of TiO 2 @C, which includes enhanced charge transfer efficiency and improved conductivity, significantly promotes the electrooxidation process. TiO 2 @C is prepared via a simple calcination approach by annealing MIL-125 at 750 °C under a nitrogen atmosphere. Systematic material characterization, including x-ray diffraction, high-resolution transmission electron microscopy, Raman spectroscopy, etc., is performed to confirm the structural properties and surface composition of TiO 2 @C. TiO 2 @C is then used to modify a glassy carbon electrode (GCE) via drop-coating. A series of electrochemical measurements are conducted for the detection of DA and UA. After optimizing the measurement procedure, simultaneous detection of DA and UA is achieved, with linear ranges of 0.2 to 200 μM for DA and 0.2 to 40 μM for UA, and detection limits of 0.11 μM for DA and 0.09 μM for UA (D = 3σ/k). Further evaluations, including anti-interference testing, stability, and reusability, provide a comprehensive understanding of TiO 2 @C’s performance. Finally, the TiO 2 @C/GCE is applied to determine DA and UA in human urine samples, yielding recoveries between 100.19–101.87 % for DA, and 93.09 %–105.30 % for UA. This study highlights the synergistic effect of TiO 2 @C in electrode modification, demonstrating its potential for the sensitive and selective electrochemical detection of DA and UA.
研究领域:
材料科学
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分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2013
·
IF 2.224
Zhimin Ren,Chao Chen,Xinxin Fu,Jia Wang,Chenyao Fan,Guodong Qian,Zhiyu Wang
Anatase TiO 2 /C composites nanorods were prepared via a simple internal-reflux approach under atmospheric pressure and subsequent carbonization. The oleic acid, which was used as the surfactant and carbon source, played an important role in synthesis and carbonization process. The TiO 2 /C nanorods prepared have high surface area and mesoporous structure, which are ascribed to the small diameter (2–4 nm) of nanorods and in situ formation of amorphous carbon , and both of those characters can improve the electrochemical property of TiO 2 /C electrode. The nanorods exhibit a high reversible capacity and improved capacity retention. The initial discharge capacity of TiO 2 /C composites is 411 mAhg −1 and still remains about 164.2 mAhg −1 after 50 cycles at a current of 177 mAg −1 , when used as anode materials for lithium ion batteries .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xinle Wang,Jin Chen,Yuzhao Ma,Jianye Shi,Yueying Wang,Xiaofeng Yang,Meidan Que,Yuxi Zhou,Yanjun Li
Two-dimensional (2D) transition metal carbide MXene (Ti 3 C 2 T x ) exhibits great potential in electromagnetic wave (EMW) absorbing materials due to its abundant surface functional groups and defects, tunable conductivity and high specific surface area. The Co@NC/TiO 2 /C composites were successfully synthesized through a solvothermal method and carbonization process using Ti 3 C 2 T x /Co-BTC as precursor. The incorporation of magnetic metal Co nanoparticles and Rutile-TiO 2 effectively addresses the issue of single loss mechanism in Ti 3 C 2 T x . The results show that CTC-100 exhibits excellent EMW absorption performance with a minimum reflection loss (RL) value of −51.3 dB at a thickness of only 1.48 mm, and the corresponding effective absorption bandwidth is (EAB, RL < −10 dB) 4.3 GHz. Simultaneously, by adjusting the matching thickness of the material from 1.29 mm to 5.0 mm, the EAB can achieve 15.42 GHz (from 2.85 GHz to 18 GHz). The excellent EMW absorption performance of CTC-100 composite is primarily attributed to the synergistic effect of magnetic loss and dielectric loss. This study provided an effective strategy for the design of Ti 3 C 2 T x -based EMW absorbing materials with high absorption intensity, reduced thickness, and broad effective absorption bandwidth (EAB).
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 12
·8100-8107
·
IF 3.9
Yu Hua,Xiaomeng Zhang,Fulin Chen,Yuantao Sun,Xinyu Wang,Ziliang Wen,Qinghao Tan,Chenxi Sun,Buhe Bateer
In this study, we utilized a simple calcination method to prepare a Ni/TiO2/C composite, which was synchronously grown from magnetic, semiconductor, and conductive materials. XRD, SEM, Raman, and XPS characterization methods were used to analyze the crystal structure, graphitization degree, morphology size, and valence state of Ni/TiO2/C, and its electromagnetic wave absorption performance was tested. It was revealed that rod-like Ni/TiO2/C had good electromagnetic wave absorption performance at a thickness of 1–5.5 mm; in particular, its reflectance reached −40 dB at 3.5 mm and its absorption bandwidth (reflectivity < −10 dB) reached 4.4 GHz (6.0–10.4 GHz) at a thickness of 4.0 mm. It was thus revealed that its electromagnetic wave absorption rate and absorption bandwidth can be regulated by its thickness. Compared with Ni/TiO2, it was proven that the conductive materials (carbon), magnetic materials (Ni), and semiconductor materials (TiO2) in the rod-like Ni/TiO2/C composite can synergistically absorb electromagnetic wave energy through dielectric and magnetic losses.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 91
·74774-74782
·
IF 3.84
Wenjun Zhu,Hui Yang,Wenkui Zhang,Hui Huang,Xinyong Tao,Yang Xia,Yongping Gan,Xingzhong Guo
A Li4Ti5O12/TiO2/carbon (Li4Ti5O12/TiO2/C) nanocrystalline composite has been successfully synthesized by a facile sol–gel method and subsequent calcination treatment. Moreover, pure Li4Ti5O12, Li4Ti5O12/C and Li4Ti5O12/TiO2 composites have also been synthesized for comparison. All the samples present a nanocrystalline structure with a uniform size distribution, and abundant phase interfaces can be detected for the Li4Ti5O12/TiO2 and Li4Ti5O12/TiO2/C composites. Electrochemical measurements demonstrate that the resultant Li4Ti5O12/TiO2/C composite exhibits a superior rate capability and cycle stability in comparison with pure Li4Ti5O12, Li4Ti5O12/C and Li4Ti5O12/TiO2 composites, which can be attributed to a high grain boundary density, abundant phase interfaces and in situ formed carbon, for storing extra lithium ions, enhancing rapid lithium insertion/extraction kinetics and improving the electron transport rate.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Yunfei Yang,Hongfang Shen,Congcong Ma,Bo Ma,Dong Li,Haibo Li,Youjun Lu,Yanmin Wang
It remains a huge challenge to design a kind of high performance, multifunctional and low cost photocatalysts driven by visible light for the remediation of pollutants from waste water. In this work, the carbon coated Tb 2 O 3 /Er 2 O 3 /TiO 2 nanotubes (Tb 2 O 3 /Er 2 O 3 /TiO 2 @C) 0D/1D hybrid photocatalysts were synthesized by a microwave hydrothermal method. Essentially, the Er 2 O 3 nanoparticles can absorb low-energy photons at 800–980 nm and emit high-energy photons to TiO 2 through the up-conversion effect, meanwhile, the Tb 2 O 3 act as a redox center to promote the separation of photoinduction charges since the instantaneous photoelectric density was increased by 10 times by compared to TiO 2 @C. As a result, the photodegradation efficiency of the optimized Tb 2 O 3 /Er 2 O 3 /TiO 2 @C photocatalysts is about 15.7 times higher than that of TiO 2 @C under visible light irradiation for decomposing rhodamine B, respectively. Moreover, the photodegradation efficiency remained above 70 % after reused for 5 times. Thus, the enhanced synergistic effect between Er 2 O 3 and Tb 2 O 3 promises the excellent photodegradation activity and reduce cost. It remains a huge challenge to design a kind of high performance, multifunctional and low cost photocatalysts driven by visible light for the remediation of pollutants from waste water. The carbon coated Tb 2 O 3 /Er 2 O 3 /TiO 2 nanotubes (Tb 2 O 3 /Er 2 O 3 /TiO 2 @C) 0D/1D hybrids were synthesized by a microwave hydrothermal method. The Er 2 O 3 nanoparticles can absorb low-energy photons at 800–980 nm and emit high-energy photons to TiO 2 through the up-conversion effect, meanwhile, the Tb 2 O 3 act as a redox center to promote the separation of photoinduction charges since the instantaneous photoelectric density was increased by 10 times by compared to TiO 2 @C. As a result, the photodegradation efficiency of the optimized Tb 2 O 3 /Er 2 O 3 /TiO 2 @C photocatalysts is about 15.7 times higher than that of TiO 2 @C under visible light irradiation for decomposing rhodamine B. Moreover, the photodegradation efficiency remained above 70 % after reused for 5 times. Thus, the enhanced synergistic effect between Er 2 O 3 and Tb 2 O 3 promises the excellent photodegradation activity and reduce cost.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）