Journal of Applied Spectroscopy
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2025
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IF 1
Han Dan,Niu Xiaoxue,Wang Jing,Yan Zihong
Zr and Cl double-doped carbon dots (Zr/Cl-CDs) were prepared by a one-step hydrothermal method using citric acid, urea, and ZrCl 4 as precursors. Zr/Cl-CDs were characterized by ultra-violet-visible spectroscopy (UV-Vis), transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy (XPS). Experimental analysis revealed that the average size of Zr/Cl-CDs was 2–3 nm, while XPS analysis revealed the presence of C–Cl and Zr–O bonds. The fluorescence quantum yield of the final CDs was 17.5% at the excitation of 360 nm. In addition, Zr/Cl-CDs exhibited excellent performance in the detection of rutin with a concentration of 30–110 and 100–160 μmol/L, respectively. Linear correlation coefficients (R 2 ) were 0.9931 and 0.9962. The underlying mechanism was that rutin had an excellent quenching effect on the emission of the Zr/Cl-CDs as the fluorescence intensity exhibited a good linear relationship between rutin concentration and fluorescence intensity. These findings provide a new strategy for synthesizing double-doped CDs for rutin detection.
研究领域:
材料科学
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分析化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2016
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IF 5.31
Shunhang Wei,Rong Wu,Xiaoxiang Xu,Jikang Jian,Haixia Wang,Yanfei Sun
Black core-shelled anatase titania were successfully prepared using a simple one-step synthetic method by calcining colloid titania precursor in N 2 flow under atmospheric pressure. The physicochemical properties of the as-prepared samples were characterized by various techniques such as X-ray diffraction, high resolution transmission electron microcopy, etc. The samples demonstrate a unique core-shelled structure and electron paramagnetic resonance spectra reveal the presence of high concentration of Ti 3+ and oxygen vacancies at the surface, which accounts for their black appearance. A possible mechanism for the formation of such core–shell structure is proposed based on the results (X-ray photoelectron spectra, etc) of products prepared under different ration between urea and hydrochloric acid. Ethanol absolute is found to have critical effect in preventing phase transition of titania (from anatase to rutile) upon elevated temperatures. The black appearance of the sample powder (high visible light absorption) as well as slow electron/hole recombination rate after introducing oxygen vacancies/N species signify the core-shelled anatase titania as an efficient visible light active photocatalyst.
研究领域:
材料科学
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光催化
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纳米材料
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表面化学
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无机合成
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Dawei Lan,Huiwen Zhu,Jianwen Zhang,Chengrui Xie,Fan Wang,Yueying Zheng,Zeyu Guo,Mengxia Xu,Tao Wu
This work provided a green, one-pot route to synthesize mesoporous g-C3N4. A series of characterizations revealed that the mesoporous sample maintained the typical structure of g-C3N4. The findings displayed that this mesoporous material had enlarged porosity and optical properties. The largest SBET of the mesoporous sample (32.65 m2/g) was 4.36 times larger than that of the bulk sample (7.48 m2/g). The photoactivity of the prepared photocatalysts was measured by the photocatalytic removal of rhodamine B (RhB). In agreement with the characterization analysis, the mesoporous g-C3N4 (99.60%) exhibited a 3.88 times better photocatalytic efficiency than that of bulk g-C3N4 (25.63%) and an 11.19 times faster reaction rate in the same period. In addition, the possible mechanism of this photodecomposition reaction was identified by the electron spin resonance (ESR) and trapping tests. The results demonstrated that •O2– and •OH made contributions, and •O2– played a dominant role in this process. This research offers a promising method for the synthesis of mesoporous g-C3N4 in an environmentally friendly and cost-effective route with remarkably high photoactivity.
研究领域:
环境化学
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材料科学
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光催化
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纳米材料
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环境功能材料
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绿色合成
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2015
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IF 6.217
Zhantao Liu,Xusong Qin,Hui Xu,Guohua Chen
In this study, a one-pot sintering process incorporating sol–gel preparation route and in-situ carbon coating was proposed for the synthesis of carbon-coated nanosized LiTi 2 (PO 4 ) 3 . Experimental results show that the prepared LiTi 2 (PO 4 ) 3 particles are of high crystallinity and well-coated by turbostratic carbon. Attributed to nanosized particles and enhanced conductivity provided by turbostratic carbon coating, the carbon-coated LiTi 2 (PO 4 ) 3 showed high rate performance and good cycling life in aqueous electrolyte. Particularly, the carbon-coated LiTi 2 (PO 4 ) 3 exhibited initial specific capacities of 103 and 89 mAh g −1 , and retained 80.6% and 97% of the initial capacities after 120 cycles at 1C and 10C in aqueous electrolyte, respectively. The high rate performance and good cycling life of carbon-coated LiTi 2 (PO 4 ) 3 in aqueous electrolyte reveal its potential as negative electrode in aqueous lithium-ion batteries for electric vehicles and industrial-scale energy storage systems .
研究领域:
材料科学
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电化学
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能源存储
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纳米技术
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无机化学
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2019
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IF 4.182
Jian Zhang,Ya Wang,Lei Dong,Zhuwen Chen,Yanding Wang,Mei Hong
Micrometer-sized hierarchical LTA-type zeolite crystals with uniform embedded macropores were synthesized via steam-assisted conversion (SAC) of spherical mesoporous silica particles (MSPs) impregnated with alkaline aluminate. The one-pot synthesis was achieved by direct transformation without the need of organic structure directing agents or pre-formed seeds. The obtained cubic hierarchical NaA zeolite materials were 2–5 μm in size which possessed a core-shell structure with a microporous wall in the shell and multi-hollow macropores about 400 nm in the core. Time-series studies revealed the in situ dissolution–crystallization formation mechanism, in which the mesoporous silica particles functioned as silica source as well as “space-filling” template. When the starting MSPs were pre-loaded with metal precursors, multi-hollow zeolite nanoreactor crystals with encapsulated metals were successfully synthesized by this strategy. The present study provides an organic-free way to fabricate hierarchical aluminosilicate zeolites with embedded macropore system.
研究领域:
材料科学
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化学合成
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纳米技术
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催化化学
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无机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）