JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 18
·22910-22920
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IF 2.478
Zhao Yuan,Zhang Mengqi,Wang Wei,Song Wenli,Jiang Kanrui,Zhang Xiaojuan
Ti 3+ /N-co-doped TiO 2 was successfully synthesized in situ by one-step hydrothermal method using tetrabutyl titanate (TBOT) as the titanium source and hydrazine hydrate as the reducing agent and nitrogen source. Afterward, the microstructure and physicochemical properties of the catalysts were characterized by transmission electron microscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, UV–vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy. Results indicated that nitrogen was effectively doped into the lattice of TiO 2 and Ti 3+ was stably presented in the prepared TiO 2 , which reduced the band-gap TiO 2 (2.96–2.75 eV) and enhanced photo-induced charge separation efficiency under visible light. In addition, the photocatalytic activity was evaluated by degradation of rhodamine B under xenon lamp with 420 nm filter. With the amount of hydrazine hydrate increased, the photocatalytic degradation performance of the sample increased first and then decreased. When the volume ratio of hydrazine hydrate to TBOT was 1:5, the sample showed the best photocatalytic performance.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Tingyuan Zhang,Lingxiao Song,Jiahui Yang,Jiajia Wang,Dong Feng,Baojun Ma
Heteroatom doping is a promising strategy for optimizing the photocatalytic activity of semiconductors. However, relying solely on single-element doping often poses challenges in modulating the capabilities of semiconductors. Herein, we adopt a strategy of simultaneously modifying ZnIn 2 S 4 with the double non-metallic elements nitrogen (N) and oxygen (O) to form (N, O)-ZnIn 2 S 4 . Interestingly, (N, O)-ZnIn 2 S 4 exhibits significantly higher hydrophilicity and specific surface area compared to pristine ZnIn 2 S 4 . The contact angle decreases from 24° to 21°, while the specific surface area increases from 56 m 2 /g to 75 m 2 /g. The hydrogen production rate of (N, O)-ZnIn 2 S 4 reaches 400 μmol/h/g, which is 2.52 times higher than that of pristine ZnIn 2 S 4 . Photoelectrochemical characterization reveals that (N, O)-ZnIn 2 S 4 has a lower overpotential, higher photocurrent, lower resistance, reduced fluorescence intensity, and shorter fluorescence lifetime. Additionally, co-catalyst loading boosts the hydrogen production activity of ZnCo 2 S 4 /(N, O)-ZnIn 2 S 4 from 548 μmol/h/g to 810 μmol/h/g, compared to ZnCo 2 S 4 /ZnIn 2 S 4 . This study presents a dual non-metallic modification strategy to enhance semiconductor properties, achieving superior performance in photocatalytic hydrogen production.
研究领域:
材料科学
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能源科学
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DOI
PubMed
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 4
·1195-1204
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IF 8.8
Dong Wei,Zhou Shi-An,Ma Yan,Chi Dian-Jun,Chen Rong,Long Hong-Ming,Chun Tie-Jun,Liu Sheng-Jun,Qian Fu-Ping,Zhang Kui
Designing a heterojunction photocatalyst to improve the separation efficiency of photogenerated electrons and holes is of great significance to improve the hydrogen production efficiency. In this work, we report a rational design to grow ZnIn 2 S 4 on Mo-MOF-derived N-doped C-coated MoO 2 (MOZIS), and it has excellent photocatalytic hydrogen production with triethanolamine (TEOA) as sacrificial agent. N-doped C improves the electron transport efficiency between MoO 2 and ZnIn 2 S 4 . The systematic study shows that MOZIS has good properties to promote the effective separation and transfer of photocatalytic charges, which is attributed to the tight contact interface and good energy band structure between MoO 2 and ZnIn 2 S 4 . The optimized nanocomposites have a high hydrogen production efficiency of 10.89 mmol·g −1 (4 h) under visible light. MOF-derived N-doped C-coated MoO 2 is an effective strategy to improve the photocatalytic hydrogen production efficiency of ZnIn 2 S 4 . Graphical abstract
研究领域:
材料科学
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能源科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Jianian Chen,Mingyu Chu,Fenglei Lyu,Jin Gong,Linzhong Wu,Lijia Liu,Yong Xu,Qiao Zhang
Two-dimensional (2D) metal carbides, carbonitrides, and nitrides (MXenes) have recently emerged as promising candidates in catalysis due to their unique properties. In this work, we composited Ti3C2 with Co-embedded N-doped carbon nanotubes (CNTs) via the pyrolysis of zeolitic imidazolate frameworks (ZIF-67) for propyne selective hydrogenation. Detailed characterizations show that strong synergistic effects are observed between the Ti3C2 and Co-embedded N-doped CNTs in the composite catalysts. This work provides an efficient strategy to achieve N-doping on Co nanoparticles, which play a vital role in the propyne selective hydrogenation. The optimized catalyst gives a high propyne conversion (∼99%) and high propene selectivity (∼96%) on propyne selective hydrogenation at 150 °C, which surpasses the reported non-noble metal catalysts in literature works. This work may not only open an avenue for obtaining active and selective catalysts for propyne selective hydrogenation but also promote research on the role of MXenes in catalysis.
研究领域:
化学工程
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材料科学
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催化
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DOI
高影响因子
DYES AND PIGMENTS
·
2022
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IF 5.122
Lin Yuan,Lei Jiang,Ze Liu,Yingying Xiang,Fei Song,Yujiao Tu
Tartrazine preferred in food and textile industries, but excessive consumption threats human health. Due to toxicity, non-biodegradability, and trace accumulation in the food chains, Hg 2+ has attracted people's attention. Thus, it is important to detect tartrazine and Hg 2+ with sensitivity way. Using VB 2 and citrate as precursors, yellow-green fluorescent carbon dots were prepared by hydrothermal method . The N-CDs were purified by dialysis, thin layer chromatography and chromatographic column. Excellent linear ranges of 0.25–5 μM and 5–50 μM of tartrazine were obtained with low detection limits 34.98 nM, while good linear ranges of 0.25–5 μM and 10–50 μM of Hg 2+ with low detection limits 29.64 nM, respectively. In addition, the quenching mechanisms of targets to the fluorescent of N-CDs were illuminated. Furthermore, the nanoprobe was efficiently applied to determine the content of tartrazine in carbonated drink, fruit jelly and sugar samples, and Hg 2+ in tap water, lake water, and river water samples. It showed great potential to detect tartrazine and Hg 2+ .
研究领域:
分析化学
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环境科学
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食品科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2022
·
IF 5.304
Xin Wang,Xiaodan Zhang,Haiyan Cao,Yuming Huang
N-doped Ti 3 C 2 quantum dots (N-Ti 3 C 2 QDs) as the fluorescent nanoprobe were synthesized through inorganic base (i.e. KOH) stripping and solvothermal approach. The N-Ti 3 C 2 QDs displayed well-monodispersed near-spherical particles with average size of 2.3 nm, exhibited brightly blue emission and good stability, and possessed 14.46% of fluorescent quantum yield. Upon addition of Co 2+ or Ag + ions, the fluorescence (FL) of N-Ti 3 C 2 QDs could be quenched significantly. Mechanism investigation indicated that the inner filter and static extinguishing effects are responsible for the Co 2+ or Ag + ions induced FL quenching of the N-Ti 3 C 2 QDs. Based on above outcomes, we developed a simple N-Ti 3 C 2 QDs based fluorescent assay for the simultaneous determination of Co 2+ and Ag + ions, with a low detection limit of 0.21 and 0.10 μM, respectively. The assay was used to determine the content of Co 2+ and Ag + in real samples. This work will provide another way for the synthesis of fluorescent N-Ti 3 C 2 QDs and exploited their application in simultaneous detection of Co 2+ and Ag + .
研究领域:
材料科学
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分析化学
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DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 1
·105-111
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IF 1.158
Di Huang,Long Yanju,Luo Lijun,Li Lingxin,Zhang Sifeng,Wang Lulu,Jiang Fengzhi
N-doped Bi2O3 with hierarchical structure was synthesized using precipitation/calcination method. In this method, ethylenediamine was used as both the nitrogen source and morphology controller besides the P123 triblock copolymer as main structure directing agent,
to control the texture and morphology of the catalyst. The microstructure and chemical composition of N-doped Bi2O3 photocatalyst were characterized with XRD, XPS, SEM-EDS, DR UV-vis, and N2 physisorption. The prepared hierarchical N-doped Bi2O3
was used for the photocatalytic degradation of 17β-estradiol (E2) under visible light. The absorption edge of prepared N doped Bi2O3 appeared an obvious red shift comparing with pure phase Bi2O3. This would help photocatalyst make full
use of light source to degrade E2. Under the same conditions of the photocatalytic reaction, the rate constant of degradation of E2 over N-doped Bi2O3 was 6.3 times of that obtained over Bi2O3. The stability of N-doped Bi2O3
and the mechanism of the photocatalytic degradation of E2 under visible light were studied.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Qian Wang,Yali Ma,Ting Yang,Yang Jiao,Dajun Lang,Yongwei Huang,Liang Cheng,Tingting Wang
As a flammable and volatile liquid, ethanol is also a marker of diabetes in children that can be rapidly detected by gas sensors based on metal oxide semiconductors. However, reducing the operating temperature and achieving high response at ultra-low concentrations remain urgent tasks. In this study, N-doped p-type MoS 2 and MIL-125(Ti) -derived n-type TiO 2 were selected to construct p-n heterostructure with rich active sites and fast carrier transport, which further optimized the detection limit of ethanol gas at lower operating temperature. Compared with pure TiO 2 , the TiO 2 @N-doped MoS 2 composite with a MoS 2 mass ratio of 60 wt% exhibits significantly improved gas sensing properties for ethanol, including lower operating temperature (160 °C), higher response value (R a /R g = 9.229 at 100 ppm), and ppb-level detection limit (1.702 at 100 ppb), as well as good repeatability and stability. These improvements in sensing performance could be mainly attributed to the electronic effects of MoS 2 , the synergistic effect of p-n junctions, and the strong adsorption energy of TiO 2 @N-doped MoS 2 composites on the ethanol gas. This work suggests that the prepared TiO 2 @N-doped MoS 2 composites are promising materials for the highly efficient detection of ethanol.
研究领域:
材料科学
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传感器技术
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纳米技术
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Xijin Zhao,Xin Kou,Xin Li,Mingjia Li,Ding Xi,Amjad Farid,Hui Huang,Yongpeng Zhao
Herein, multi-layer composite electrodes of MnFe 2 O 4 @carbon nanotubes/carbon cloth (MFO@CNT/CC) are prepared by dip coating and the subsequent hydrothermal method. Flexible conductive carbon cloth (CC) substrate provides a 3D strong base support. The carbon nanotubes (CNT) connected by CC form a conductive network with a large specific area, which is also conducive to electron transfer. The modified MnFe 2 O 4 nanoparticles have abundant active sites, which can enhance the electrochemical activity. CNT and MnFe 2 O 4 nanoparticles form a tandem structure beneficial to increase the active site and promote the response to heavy metal ions. The MFO@CNT/CC electrode has good detection performance for Cd 2+ (0.25–12 ppm) and Pb 2+ (0.25–12 ppm) and a low detection limit of 0.25 ppm. In the presence of interfering ions, it exhibits a highly selective response to the target ion, with minimal current changes and a range of variations (−3.48–5.59 %). The actual detection recovery is in the range of 97.33–101.17 %, suggesting its practical reliability. Furthermore, we propose a detection and analysis method that combines electrochemistry with machine learning; the model attains a perfect classification accuracy of 100 % for both Pb 2+ and Cd 2+ , underscoring the robustness of the classification. Overall, this work provides innovative composites and performance explorations for advancing high-performance simultaneous detection of heavy metal ions.
研究领域:
材料科学
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环境科学
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电化学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
He-Qiang Chang,Guo-Hua Zhang,Kuo-Chih Chou
Electrochemical water splitting is considered a sustainable route for the hydrogen industry. In this work, Mo 2 C/MoC heterostructure supported on N -doped carbon (Mo 2 C/MoC@NC) was prepared via a carbonization strategy. For the product (Mo 2 C/MoC@NC-1-2) fabricated with a g-C 3 N 4 / ammonium molybdate tetrahydrate molar ratio of 1:2 at 700 °C under 10%CH 4 /H 2 atmosphere, a high stability and good HER activity with a η 10 of 113 mV in 1M KOH were achieved. To further enhance the catalytic performance of the synthesized Mo 2 C/MoC@NC, the phosphating strategy was proposed for the preparation of Mo 2 C/MoC/MoP heterostructure supported on N-doped carbon (Mo 2 C/MoC/MoP@NC). When the precursor Mo 2 C/MoC@NC-1-2 was phosphated at 650 °C with a heating rate of 5 °C min −1 and kept for 0 min, the as-synthesized Mo 2 C/MoC/MoP@NC-650-0 exhibits good HER catalytic activity with a pretty low η 10 of 78 mV, a j 0 of 0.398 mA cm −2 , and a Tafel slope of 52 mV dec −1 in 1M KOH. This good activity of HER can be ascribed to the N-doped carbon as substrate and the construction of transition metal-based heterostructures.
研究领域:
材料科学
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电化学
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DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2020
·
IF 2.65
Chang Ma,Lei Liu,Fang Zhang,Yue Zhang,Senlin Hou,Aibing Chen
The hierarchical porous carbon (HPC) materials have rich porous structure , high specific surface area and reasonable porosity for a wide range of applications in many fields, such as catalysis, adsorption, and energy storage, etc. Although some synthetic strategies have been developed, efficient preparing HPC materials remains challenging. In this work, we propose a method to prepare N-doped hierarchical porous carbon (NHPC) by acetone dissolution following co-assembly process. 1-Alkyl-3-methyl imidazole bromide ([C 18 Mim]Br), tetraethyl orthosilicate (TEOS) and resorcinol-formaldehyde were co-assembled to form a pleated sheet composite material, where [C 18 Mim]Br induced formation of the sheet structure and also led to nitrogen doping in the carbon skeleton. TEOS created a mesoporous structure and increased specific surface area, while acetone dissolved the oligomer of the resin, creating a macroporous structure, but destroying the morphology of the sheet. At an appropriate amount of acetone, the resulting NHPC exhibits the hierarchical porous structure, high specific surface area and N-doping characteristics. When used as a supercapacitor material, NHPC exhibits the specific capacitance is as high as 241 F g −1 at 1 A g −1 . Furthermore, the symmetric supercapacitor manufactured with NHPC has a power density of 4.1 kW kg −1 , an energy density of 2.56 Wh kg −1 , and demonstrates excellent cycle stability of up to 92.82%, exhibiting the potential as good supercapacitor materials.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 10
·4136
·
IF 4.6
Yongwang Ren,Huizhong Xu,Beibei Han,Jing Xu
At present, the selective hydrogenation of α, β-unsaturated aldehydes remains a challenge due to competition between unsaturated functional groups (C=C and C=O). In this study, N-doped carbon deposited on silica-supported nickel Mott–Schottky type catalysts (Ni/SiO2@NxC) was prepared for the selective hydrogenation of cinnamaldehyde (CAL) by using the respective hydrothermal method and high-temperature carbonization method. The prepared optimal Ni/SiO2@N7C catalyst achieved 98.9% conversion and 83.1% selectivity for 3-phenylpropionaldehyde (HCAL) in the selective hydrogenation reaction of CAL. By constructing the Mott–Schottky effect, the electron transfer from metallic Ni to N-doped carbon at their contact interface was promoted, and the electron transfer was demonstrated by XPS and UPS. Experimental results indicated that by modulating the electron density of metallic Ni, the catalytic hydrogenation of C=C bonds was preferentially performed to obtain higher HCAL selectivity. Meanwhile, this work also provides an effective way to design electronically adjustable type catalysts for more selective hydrogenation reactions.Keywords:Ni catalyst;N-doped carbon;electronic effect;cinnamaldehyde hydrogenation
研究领域:
催化化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
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