CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Mengran Li,Jialing Gu,Qinke Tang,Jiabao Bai,Bin Cui,Ruoyu Ma,Yunfeng Zhu,Rui Shi,Yao Zhang,Jiguang Zhang,Yana Liu,Jun Wang,Zhixin Ba,Xiaohui Hu
Magnesium hydride (MgH 2 ) is a highly promising solid-state hydrogen storage material, but its application is hindered by sluggish kinetics and high operating temperatures. Currently, alloying and catalysis are effective strategies for improving the hydrogen storage performance of MgH 2 , but the designing of a hydrogen ab/desorption system which synergistically combines them remains a challenge. Herein, Mg Al solid solution and intermetallic compounds (Al species), and a spherical Nb-doped TiO 2 (Nb-TiO 2 ) were introduced into Mg/MgH 2 to enhance the hydrogen storage performance. Al species significantly enhanced the dehydrogenation thermodynamics of Mg 90 Al 10 - 15 at.% Nb-TiO 2 , while improving the hydrogen ab/desorption kinetics of the composite synergistically with the Nb-TiO 2 . Density functional theory (DFT) calculations revealed that the synergism of Al species and Nb-TiO 2 led to preferential adsorption of H atoms at the interfaces of Nb-TiO 2 and Mg 17 Al 12 , with abundant electron transfer. The dehydrogenation enthalpy ( ΔH ) of Mg 90 Al 10 - 15 at.% Nb-TiO 2 decreased from 80.86 (MgH 2 ) to 69.05 kJ/mol, while its hydrogen desorption apparent activation energy ( E a ) decreased from 146.40 (MgH 2 ) to 88.80 kJ/mol simultaneously. The composite could absorb 4.70 wt% H 2 within 2000 s at 200 °C and showed a dehydrogenation onset temperature of 209 °C. This work reveals a synergistic effect between alloying and catalysis, advancing both the performance enhancement strategies and the mechanistic understanding of Mg-based hydrogen storage materials.
研究领域:
材料科学
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氢储能
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固态化学
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计算材料学
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纳米催化
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能源材料
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产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 32
·e202401965
·
IF 1.9
Xiulong Shi,Biyang Tuo,Shengqing Wang,Jianli Wang,Yaxin Deng,Xvjun Zhang
Graphical In this paper, heterojunction photocatalyst TiO 2 @BiOCl-BiOI was successfully synthesized by composite modification method combined with sol-gel method, and it was applied to the degradation of CR. Thanks to the heterostructure structure, TiO 2 @BiOCl-BiOI showed excellent photocatalytic performance for CR under simulated sunlight, with a removal rate of 96.45 %. After 5 times of recycling, the removal rate of CR by TiO 2 @BiOCl-BiOI is still higher than 87 %. Under the action of ⋅O − 2 , h + and ⋅O, CR is oxidized to H 2 O, CO 2 and other harmless substances. TiO 2 @BiOCl-BiOI heterostructure photocatalyst with high photocatalytic activity was prepared by the composite modification and sol-gel procedure. TiO 2 nanoparticles highly dispersed on the surface of TiO 2 @BiOCl-BiOI, which provides sufficient active sites for the photocatalytic degradation process. The photodegradation performance of the photocatalyst was evaluated by the removal rate of Congo Red. The researches showed that the degradation effect of TiO 2 @BiOCl-BiOI for Congo Red is significantly stronger than that of TiO 2 and BiOCl-BiOI, which is mainly due to the type-II heterojunction structure of TiO 2 @BiOCl-BiOI and its enhanced visible-light response. The experiments of free radical capture indicated that ⋅ and are the main active species in the photocatalytic degradation system. This study showed that TiO 2 @BiOCl-BiOI can almost completely degrade Congo Red under simulated sunlight, making it the harmless substances such as H 2 O and CO 2 .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hongying Cheng,Song Liu,Cuiying Hu,Hongxia Wang
A novel flower-like film composed of uniform hollow TiO 2 -NH 2 nano-shell (HTNs), luminol and aniline was synthesized by electro-copolymerization method in acidic ionic liquid EmimCl (IL, 1-ethyl-3-methylimidazolium chloride). The surficial morphology of the film was characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), selected-area electron diffraction (SAED) and atomic force microscope (AFM), which showed the polycrystalline property. Its copolymerization mechanism was discussed in detail, which presented symmetric arrangement. The most obvious multiple increase of peak current in CV indicated the conjugate of HTNs in luminol structure and in aromatic ring skeleton. This film with excellent electrocatalysis performance used for nonelectroactive acetochlor (ACT) detection showed the lowest catalytic potential. Some important parameters were optimized for a homogeneous film and for a sensitive detection. On the optimum film, the electrocatalysis sensor exhibited a linear response within the concentration range of ACT from 2.0×10 −7 M to 1.5×10 −5 M, and an absolute detection limit of 0.15×10 -9 M at a signal-to-noise ratio of 3. Then the proposed method was used for the detection of ACT residue in the real strawberry sample with good results. The promising sensor presents good reproducibility and stability, providing a new fast and sensitive method for the analysis of real samples in environment.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Ao Zhang,Yan Zhang,Weihua Cheng,Xinran Li,Kai Chen,Fangjie Li,Dongye Yang
This study presents a novel strategy for the rapid detection of hydrogen and ammonia gases through the synthesis of a composite material that integrates SnO 2 and TiO 2 into an n-n heterostructure on the surface of two-dimensional layered Ti 3 C 2 Tx MXene. The incorporation of Pd nanoparticles significantly enhances the sensor's adsorption and sensing capabilities, particularly for hydrogen. The resulting dual-gas sensor demonstrates a pronounced linear response to hydrogen with a low detection limit of 200 ppb, along with rapid response times, excellent repeatability and long-term stability. Leveraging MXene's superior ammonia adsorption properties, the sensor also exhibits commendable linearity and robustness in detecting ammonia, with strong resistance to humidity-induced interference. To further improve the sensor's performance, machine learning techniques such as support vector machine (SVM) and artificial neural network (ANN) are incorporated, substantially enhancing the sensor's selectivity and sensitivity of the detection. These advancement enables the precise identification and quantification of complex gas mixtures containing hydrogen and ammonia. The sensor’s meticulously designed circuitry operates in real-time sensing mode, ensuring accurate differentiation between the two gases. This research establishes a robust foundation for the development of advanced gas sensing technology, showcasing its potential for multi-gas detection and analysis across diverse industrial and environmental applications.
研究领域:
材料科学
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传感器技术
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人工智能
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Zhongming Wang,Xiaoqian Huang,Yong Jia,Lina Guo,Hong Wang,Wenxin Dai
Photocatalytic hydrogen production from formic acid (FA) is a daunting challenge, yet an essential task for the development of hydrogen energy. In this study, a p-NiO/n-TiO 2 heterojunction incorporating 7-nm metallic Ni was fabricated, which demonstrated a remarkable localized surface plasmon resonance (LSPR) effect. Notably, 5 wt% Ni/TiO 2 exhibited 1271-fold higher photocatalytic activity (2416 μmol⋅g −1 ⋅h −1 ) than TiO 2 alone under light radiation at room temperature. The experimental investigations revealed the excitation of distinct components via irradiation by different light sources. Visible light-driven hydrogen production was predominantly influenced by the LSPR-induced hot electrons and holes effects of Ni. Further, FA molecules simultaneously lost and accepted electrons at the Ni 0 –Ti 3+ and Ni 0 –O 2− sites, respectively, generating a bidirectional electron transfer behavior with “valley-shaped” gas-sensitive responses, which was crucial to boost the activity. Moreover, the photocatalytic activity was mainly attributed to the heterojunction and defects structure under UV light irradiation, and Ti 3+ , V O s, and O 2− as adsorption sites for FA. Thus, the synergistic interplay among different light sources could effectively boost the photocatalytic hydrogen production performance. Significantly, this research reveals that the LSPR effect of metallic Ni can effectively regulate electron transfer behavior and enhance visible light-driven photocatalytic activity.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 23
·2960-2968
·
IF 2.378
Le Peng,Jun Zhou,Zhaoheng Liang,Yaping Zhang,Lucia Petti,Tao Jiang,Chenjie Gu,Danting Yang,Pasqule Mormile
Based on surface-enhanced Raman scattering (SERS) technology, Au@Ag@4MBA@5′-NH2-ssDNA probes and a Ag/TiO2@3′-NH2-ssDNA substrate were prepared and constructed into a sandwich structure to develop a high sensitivity bioassay of miRNA-21. The Au@Ag@4MBA@5′-NH2-ssDNA probes were prepared by immobilizing 5′-NH2-ssDNA onto the surfaces of 4MBA-labelled Au@Ag core–shell nanoparticles, and the Ag/TiO2@3′-NH2-ssDNA substrate was prepared by immobilizing 3′-NH2-ssDNA on the surface of Ag/TiO2 nanowires SERS-active substrates. The experimental results showed that the SERS-based sandwich bioassay of miRNA-21 presented a low limit of detection of 0.75 fM and a broad dynamic range from 1.0 fM to 1.0 nM. Also, the test data for the SERS-based sandwich bioassay were not only consistent with that of the real-time fluorescence quantitative polynucleotide chain reaction (RT-qPCR) method but also displayed higher detection sensitivity. It was shown that the SERS-based sandwich bioassay of miRNA-21 has importance for use in potential applications involving diagnosing clinical cancer patients.
研究领域:
生物技术
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分子诊断
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纳米医学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 6
·期 2
·025055
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IF 1.151
Jiao Xu,Yihao Shi,Yufei Chen,Qing Wang,Jian Cheng,Ping Li
The synergy of up-conversion luminescence nanocrystals NaYF4:Yb,Tm and CdS quantum dots(CdS QDs) is used to improve the photocatalytic activity of TiO2 in visible and infrared light. The photocatalyst was fabricated with the water-soluble NaYF4:Yb,Tm nanocrystals as the core and anatase-TiO2 as the shell. Then CdS QDs were deposited on the surface of shell TiO2 by hydrothermal method. The photocatalytic activity of the prepared NaYF4:Yb,Tm@TiO2/CdS QDs composite was investigated by photodegration of Rhodamine B under white, visible light and near-infrared light. When compositing TiO2 with the upconversion NaYF4:Yb,Tm, the photocatalytic activity of the NaYF4:Yb,Tm@TiO2 was 6.8 times to TiO2 under white light and 2.5 times to TiO2 under visible light. After coupling the upconversion effect and the quantum dots sensitization effect with TiO2, the photocatalytic activity of the NaYF4:Yb,Tm@TiO2/CdS QDs composite was significant 11.2 times to TiO2 under white light, and 6.5 times to TiO2 under visible light, respectively. Even more considerable enhancement was discovered under the near-infrared light. The NaYF4:Yb,Tm@TiO2/CdS QDs composite showed 1590 times relative to almost no activity of TiO2. The photocatalytic enhancement is attributed to two effects. First, the sensitization of CdS QDs can extend the absorption region of TiO2 to 490 nm. Secondly the upconversion NaYF4:Yb,Tm can absorb near-infrared light and emit ultraviolet (348 nm and 366 nm) absorbed by anatase-TiO2 and visible light (476 nm) absorbed by CdS QDs.
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
RSC Advances
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2016
·Vol. 6
·期 99
·96768-96777
·
IF 3.289
Yuhao Chu,Yuenan Chen,Nanjun Chen,Fanghui Wang,Hong Zhu
Recently a new method for increasing the ion conductivity of anion exchange membranes (AEM) was developed based on the novel materials ionic liquids (ILs). We mixed the ILs into the membrane directly instead of immobilizing onto the polymer backbone as in the traditional way. Nano-TiO2 was introduced to stabilize the ILs in the membrane. The ILs were immobilized by the nano-TiO2, acting as the “active sites” in the membrane, to enhance the mobility of the hydroxyl groups so as to increase the ion conductivity. Both pure ILs composite membranes and ILs–TiO2 composite membranes were synthesized, and their properties were compared. 1H nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy were used to analyze the structures of the composite membranes. The mechanical properties, thermal stabilities, ion conductivities, water uptakes, swelling ratios, and ion exchange capacities of the membranes were investigated. The interaction between the TiO2 and ionic liquids was confirmed by X-ray diffraction. The stability of the ILs in the membrane was measured comprehensively. All these results show that this novel method is effective and promising for AEM applications.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Zhihong Zhang,Shuai Zhang,Linghao He,Donglai Peng,Fufeng Yan,Minghua Wang,Jihong Zhao,Hongzhong Zhang,Shaoming Fang
A composite made of polyacrylic acid and hollow TiO 2 spheres (TiO 2 @PPAA) was prepared by the plasma polymerization method and subsequently used as an electrode material for detecting lysozyme . The chemical structure, surface morphology , and electrochemical performance of the TiO 2 @PPAA composite were mainly affected by the plasma input power used during plasma polymerization. After optimizing plasma conditions, aptamer strands exhibited high adsorption affinity toward the surface of TiO 2 @PPAA composite via synergistic effects between TiO 2 and PPAA. Electrochemical impedance spectroscopy results showed that the developed TiO 2 @PPAA aptasensor presents highly sensitive detection ability toward lysozyme; the limit of detection of the proposed aptasensor is 0.015 ng mL −1 (1.04 pM) within the range of 0.05–100 ng mL −1 in terms of 3 σ value. The film further showed excellent selectivity toward lysozyme in the presence of interfering proteins, such as thrombin, bovine serum albumin , and immunoglobulin E. Thus, this aptasensing strategy might broaden the applications of plasma polymerized nanomaterials in the field of biomedical research and early clinical diagnosis.
研究领域:
生物医学工程
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分析化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Ziyang Lu,Fei Chen,Ming He,Minshan Song,Zhongfei Ma,Weidong Shi,Yongsheng Yan,Jinze Lan,Fang Li,Peng Xiao
Magnetic imprinted TiO 2 photocatalyst (MITP) with excellent transparency was prepared via a microwave heating method based on enrofloxacin hydrochloride (ENRH) as the template molecule, methyl methacrylate (MMA) as the functional monomer, and TiO 2 @SiO 2 @Fe 3 O 4 (TSF) as the matrix material. TSF was synthesized by a mild sol–gel method. The results indicated that MITP possessed hierarchical spherical structure, good monodispersity, superior magnetic properties (Ms = 11.59 emu/g), the average diameter was approximately 410 nm, and the surface-imprinted layer was composed of the imprinted polymer and poly (methyl methacrylate). Moreover, MITP was proved to exhibit an excellent photochemical stability and a higher photocatalytic efficiency than other photocatalysts, the apparent rate constant ( k ) for degradation of ENRH with MITP in 90 min under the visible light irradiation was 1.08 min −1 . The coefficient of selectivity ( k selectivity ) of MITP relative to TSF and magnetic non-imprinted TiO 2 photocatalyst (MNITP) was 2.14 and 2.08, respectively, indicating that MITP also possessed the strong ability to selective recognition and photodegradation of ENRH in the binary antibiotic residues solution containing ENRH and tetracycline (TC). In addition, the mechanism and intermediate products of selective photodegradation of the binary antibiotic residues solution with MITP were further discussed.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2017
·Vol. 9
·期 10
·1497-1504
·
IF 1.889
Shao Xuefeng,Mo Songping,Pan Ting,Chen Ying,Jia Lisi,Yang Zhi,Yin Tao,Cheng Zhengdong
This study investigated the dispersion stability of aqueous TiO2 nanofluids. The dispersion stability of binary nanofluids containing different concentrations of TiO2 nanoplatelets (TiNP) and TiO2 nanospheres (TiNS), either with or without dispersant
sodium dodecyl sulfate (SDS), was evaluated by sedimentation observations and measurements of the Turbiscan stability index (TSI) values. The results revealed that the mixing of TiNS and TiNP nanofluids remarkably improved the dispersion stability than those of the individual TiO2
nanoplatelets and nanospheres. Additionally, the binary nanofluids exhibited good dispersion stability up to 70% percentage of TiNP, after which the sedimentation increased. Moreover, the maximum total concentration of 0.8 wt.% TiO2 binary nanofluids exhibited greater dispersion
stability than those of the individual nanoparticles, but further increase to 0.9 wt.% resulted in the loss of dispersion stability. Furthermore, the addition of dispersant SDS further improved the dispersion stability of the TiO2 nanofluids in case of the individual nanoparticles
as well as that of binary nanofluids and retained good dispersion stability for increase in the maximum nanoparticle concentration from 0.9 to 4.0 wt.% of the TiO2 nanofluids. The improved dispersion stability of TiO2 nanofluids after combination with each other as well
as with SDS offer potential applications for development of novel heat transport media and engineering research.
研究领域:
材料科学
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热力学工程
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化学工程
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
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2023
·
IF 1.5
Liying Wei,Xiaokun Li,Suxiang Feng
In this paper, a CdSe quantum dots (QDs) sensitized TiO 2 photoanode was synthesized by molten-salt-assisted self-assembly (MASA) on a fluorine-doped tin oxide (FTO)-coated glass (CdSe QDs-TiO 2 /FTO), and an efficient photoelectrochemical (PEC) sensor was constructed for the sensitive detection of rutin. CdSe can transfer photo-excited electrons to the conduction band of TiO 2 , thus enhancing the photoelectric activity of TiO 2 . The experimental results show that the PEC sensor has excellent selectivity, good stability, and a wide linear response range for rutin of 0.025–50.0 μM with a low detection limit of 0.007 μΜ. Moreover, the PEC sensor was successfully applied to the detection of rutin content in serum sample.
研究领域:
分析化学
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生物医学工程
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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）