Arabian Journal of Chemistry
·
2024
·
IF 5.3
Azim Khan,Ruhumuriza Jonathan,Shafiq Ur Rehman,Muhammad Shoaib,Feng Cao,Sajjad Ali,Mohamed Bououdina,Pir Muhammad Ismail,Junwei Wang,Hazem Abu-Farsakh,Yifan Liu,Xian Jian
Enhancement in the visible light absorption and efficient interfacial charge transfer is crucial for optimizing photocatalytic efficiency in the degradation of pollutants such as methyl orange (MO) and formaldehyde. This study focuses on the properties of a TiO 2 /C/g-C 3 N 4 hybrid efficient photocatalyst, which is developed using an air calcination method to deposit graphitic nitride (g-C 3 N 4 ) onto a carbon-modified TiO 2 surface. The characterization techniques, including high-resolution transmission electron Microscopy (HRTEM), X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), were used to provide a comprehensive understanding of the material’s structural, morphological, thermal, and chemical properties. This hybrid catalyst is specifically engineered for the efficient decomposition of methyl orange (MO) and formaldehyde, demonstrating a significant increase in photocatalytic activity. The TiO 2 /C/g-C 3 N 4 photocatalyst also exhibits an enhanced specific surface area of 181.2 m 2 /g, which facilitates increased physical adsorption and photo-catalytic active sites. Experimental results confirm that this catalyst effectively adsorbs MO physically even in the dark without degradation. Combining physical and photo-catalytic functions, this catalyst degrades 94 % of MO within 180 min with the initial concentration 0.2 mol/L of MO, and achieves almost 100 % decolorization of MO under visible light irradiation. Notably, the catalyst retains its high activity after 4 cycles of MO degradation, underscoring its durability and consistent performance. Additionally, the hybrid catalyst features a staggered type-II energy level configuration, which effectively enhances charge separation and boosts photocatalytic efficacy. The incorporation of an ultrafine carbon layer further augments electron mobility towards the surface, crucial for effective catalytic reactions. This study paves the way for future development of highly efficient photocatalytic materials for environmental purification.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiefei Ding,Xin Ding,Xinxiu Wang,Guanglong Li,Xianglong Meng,Yong Zhang,Ruirun Chen
The application of Mg-based hydrides in portable and stationary energy storage is primarily hindered by sluggish sorption kinetics and unfavorable cycle stability. Herein, an attempt is made to enhance the hydrogen storage properties of MgSc alloy by the addition of TiO 2 nanoparticles to regulate multivalent‑oxygen vacancy. The formation of Sc 2 O 3 and MgTi 2 O 4 phases during heat treatment act as active sites, facilitating hydrogen absorption in the initial stages. Notably, MgSc-TiO 2 demonstrates a rapid rate of de/hydrogenation. The absorption capacity in the first cycle is 6.5 wt%, and releases 6.3 wt% H 2 within just 5 min. TiO 2 doping significantly improves the kinetics and cycling stability of the hydrogen absorption and desorption reaction, achieving a reversible capacity of 6.14 wt% at 320 °C. After 10 cycles, the capacity remains 6.32 wt% without visible decay. The improvement is attributed to the solid solution effect of Sc, the multivalent of Ti, the acceleration of electron transfer by oxygen vacancies and the alleviation of volume expansion stress by MgTi 2 O 4 . Ti hydrides participate in the de/hydrogenation reaction. Additionally, multivalent Ti contributes to electron transfer between Mg 2+ and H − , thereby weakening the stability of Mg H bond. Oxygen vacancies enhance the absorption of hydrogen and accelerate H atoms diffusion.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xiaosong Zhou,Jiabao Liang,Limei Xu,Siyu Wu,Minyi Xie,Qiongdan Liang,Jin Luo,Xuliang Fan,Xunfu Zhou,Xiaoqin Zhou
The photocatalytic efficiency of Black P is limited by its rapid carrier recombination and poor oxidation ability. In contrast, the photocatalytic efficiency of TiO 2 is limited by its rapid carrier recombination and poor visible light absorption capability. Given this, coupling Black P with TiO 2 to construct a heterojunction achieves complementary weaknesses. With an effective photocatalytic water splitting activity, Black P/TiO 2 produces hydrogen at a rate of 139.50 μmol h −1 g −1 under visible light, which is 4.73 times more than Black P’s. The main reason for the big increase in photocatalytic activity is that a Z-scheme heterojunction forms between Black P and TiO 2 . The internal built-in electric field promotes the recombination of electrons with low reduction potential and holes with low oxidation potential, achieving spatial separation of photogenerated electrons with high reduction potential and holes with high oxidation potential. This spatial separation endows the heterojunction photocatalyst with excellent redox capabilities.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2024
·Vol. 99
·期 4
·978-988
·
IF 2.8
Likai Dai,Zheng Fang,Anxian Peng,Yunhong Chen,Yitong Liu,Huimei Chen,Rongjun Yan,Rencheng Zhou,Mingming Du
BACKGROUND Photothermal catalytic oxidation technology for synthesis of high value-added chemicals has become a hot topic of research at home and abroad. As a special structure, titania (TiO 2 ) nanotubes (Ti-NTs) possess larger specific surface area and adsorption capacity, which have shown great application prospects in photothermal catalytic oxidation. RESULTS In this work, high-performance palladium (Pd-Ti-NTs catalyst were prepared and applied to the photothermal catalytic oxidation of 5-hydroxymethyl (HMF) and benzyl alcohol. The photothermal dependence on catalytic activity and selectivity of HMF and benzyl alcohol oxidation was studied in detail. The results revealed that compared with thermal catalytic oxidation, the catalysts showed significantly higher conversions of both benzyl alcohol and HMF under light. in particular, HMF conversion increase from 55.6% to 99.7%. Aldehyde oxidation is inhibited by alcohol and can be dramatically promoted by light radiation. This is probably because alcohol can inhibit the adsorption of aldehyde, and this inhibiting effect is weakened through light radiation, thus promoting the oxidation of aldehydes. Therefore, the selectivity of the final products 2,5-furandicarboxylic acid (FDCA) and benzoic acid were dramatically increased in both systems under light radiation, and the selectivity for FDCA was obviously increased from 5.8% to 61.3%, and the yield reached 61.0%, which is higher than that of most of the reported Pd-TiO 2 -based catalysts for FDCA. CONCLUSIONS In this paper, we verify that Pd-Ti-NTs could preferentially promote the conversion of aldehydes to acids in the presence of light, and obtained catalysts with high catalytic performance and high stability for benzyl alcohol and HMF oxidation. © 2024 Society of Chemical Industry (SCI).
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2024
·
IF 3.4
Zihao Song,Longjin Huang,Sheng Cui
In this work, a novel strategy for preparing Ga-doped TiO 2 composite aerogel antibacterial agent through the sol–gel method and supercritical technology is demonstrated. The specific surface area of the samples is as high as 175 m 2 g −1 and exhibits a 3D network structure with a multistage pore distribution. The obtained antibacterial agent combines the phototoxicity of TiO 2 , photo-independent toxicity of Ga 3+ , and structural properties of aerogels, showing a synergistic antibacterial effect. On the one hand, TiO 2 produces reactive oxygen species in the presence of light, thus destroying the structure of bacteria. On the other hand, Ga 3+ competitively replaces Fe 3+ and hinders the metabolic process of bacteria. Moreover, the structural properties of aerogels promote superior antimicrobial performance of antibacterial agents. Their antibacterial properties against Escherichia coli and Staphylococcus aureus bacteria are mainly investigated through the inhibition zone and natural colony counting method. In the results, it is shown that the structure and bactericidal activity of TiO 2 aerogel is effectively optimized with Ga 3+ doping. The maximum zone of inhibition of the composite aerogel against E. coli and S. aureus is 17.5 and 16 mm, and the bactericidal rate is as high as 98.57% and 96.60%, which exhibit outstanding bactericidal performance.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yunlei Cen,Yuanyuan Zhou,Mingshi Zhu,Ke Zheng,Shaoqi Zhou
In this work, Ti/TiO2-RNTs/SnO2–Sb–Ni-La electrodes were developed in three deposition stages. TiO2-RNTs improved the bonding of the bottom layer, and Ni–La codoping resulted in higher film stability. Compared with other electrodes, this electrode exhibits excellent performance with a denser structure, higher OEP (2.17 V), lower Rct (5.36 Ω), longer electrode strengthening life, and larger active specific surface area. The degradation of oily wastewater revealed an oil removal rate equal to 97.88% under optimal conditions. In comparison to the Ti/TiO2-RNTs/SnO2–Sb obtained via the one-step hydrothermal technique, the service life improved by 8.60 times, and the degradation rate (RD) of the current electrode (k = 0.0254 min–1) was enhanced by 2.67 times, whereas the removal rate remained stable after 10 cycles. Under the continuous attack of free radicals such as •OH, 48 types of organic matter in wash oil were decomposed, and most of the alkanes and polycyclic aromatic hydrocarbons were mineralized. Compared with direct current, pulse current electrolysis of the oil-washing wastewater can save 47.95% electrical energy, and the energy consumption of chemical oxygen demand removal per unit mass can be reduced by 72.02%. Therefore, the Ti/TiO2-RNTs/SnO2–Sb–Ni-La pulse electrochemical oxidation method is expected to reduce energy loss and improve the electrochemical treatment of oily wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Aiqun Kong,Mao Peng,Menghui Liu,Ye Lv,Houjun Zhang,Yusheng Gao,Jing Liu,Yan Fu,Wei Li,Jinli Zhang
Herein, we developed a novel and simple strategy to construct Pt-decorated TiO 2 /β-Ni(OH) 2 nanosheet arrays that steadily deliver large current densities in alkaline electrolyte. It is of great interest to find that the versatile role of few-layered Ti 3 C 2 endows the unique growth mechanism of Pt/TiO 2 /β-Ni(OH) 2 . It is worth noting that the interconnected array electrode exhibits noticeable hydrogen evolution reaction (HER) performance, achieving ultralow overpotentials of 107, 145 and 184 mV at high current densities of 500, 1000 and 1500 mA cm −2 , respectively, which outperforms most reported HER electrocatalysts. It requires only 1.95 V to drive 1000 mA cm −2 towards full water electrolysis along with considerable stability. It is demonstrated for the first time that the synergistic effect of Pt and TiO 2 /Ni(OH) 2 the enhanced HER performance. This work reports a robust nanoarray support for Pt electrocatalyst to break through its intrinsic barrier in alkaline HER and under large current density.
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2024
·Vol. 15
·期 3
·2402295
·
IF 24.4
Songshan Zhu,Shimin Ma,Di Song,Sufang He,Yunzhu Wang,Jichang Lu,Tianhao Ai,Yongming Luo
The regulation and stabilization of strong metal-support interactions (SMSI) in high temperature hydrogen-rich reaction condition remains a huge challenge due to its structural sensitivity. Herein, tunable SMSI is constructed and stabilized on TiO 2 supported Ni catalysts by TiO 2 crystal phase engineering strategy, and then a SMSI-degree-depended ethanol stream reforming (ESR) performance is demonstrated. Rutile supported Ni exhibited a weakened SMSI with 48.6% coverage, exposing more metallic Ni and Ni-TiO 2 perimeter interface sites, and displayed exceptional H 2 yield of 4.7 mol H2 /mol ethanol and an ultra-long stability of 420 h without deactivation at 500 °C. The low reaction energy and high resistance to carbon deposition (0.9 mg c /g cat ·h) and Ni 0 sintering on Ni/r-TiO 2 catalyst explained its excellent catalytic performance. Furthermore, the effect of well-defined SMSI structures on the reaction pathway and deactivation mechanism of the ESR is clarified. This work provides a precedent for the tailor and application of SMSI in high temperature hydrogen-rich reaction conditions.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yi-Fan Qiao,Wen-Cui Li,Lei He,Jia Wang,Danhui Sun,Zihao Wang,An-Hui Lu
To efficiently convert ethanol into C 4+ olefins without an external hydrogen supply, this study designed an anatase-supported zinc oxide catalyst (ZnO/TiO 2 -A). Combining characterizations with kinetics measurements, we infer that the highly dispersed Zn-O-Ti sites efficiently promote ethanol dehydrogenation to acetaldehyde, which is identified as the rate-limiting step. Concurrently, Ti-O sites with strong C-C coupling ability convert acetaldehyde into high-carbon enal intermediates, which subsequently undergo hydrogenation and dehydration to yield C 4+ olefins with a high formation rate of 43.96 mmol C-atom ·g cat. −1 ·h −1 , outperforming most reported catalysts in the literature. Crucially, nuclear magnetic resonance spectroscopy analysis confirms that ethanol acts as an intrinsic hydrogen donor, supplying active hydrogen for the hydrogenation of C C and C O bonds in enal intermediates, thereby obviating the need for external hydrogen. This work presents a new strategy employing a non-precious metal oxide catalytic system for upgrading ethanol to high-value products.
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Zebao Rui,Xin Zhong,Hongli Fang,Jiaqi Chen,Shen Jinlong
Titanium dioxide (TiO2) based photocatalysts have been extensively explored, yet their practical application is hindered by limited light absorption and inefficient light-matter interactions. Herein, a robust TiO2-supported carbon quantum dots (CQDs) and CuAg bimetallic nanoparticles (CQDs/CuAg/TiO2) ternary composite catalyst is developed for photothermal catalytic VOCs degradation. The low-dimensional CQDs modulate the micro-environment at the CuAg-TiO2 interface, induce electronic redistribution, and amplify the localized surface plasmon resonance (LSPR) effect of CuAg nanoparticles through geometric and electronic synergies. Such micro-environmental modulation optimizes the spectral absorption range, enhances carrier generation/separation efficiency, and promotes hot-electron-mediated VOCs activation ability and photothermal synergy of CQDs/CuAg/TiO2. The ternary design not only reduces noble metal dependency but also achieves remarkable photothermal synergy. Under simulated three times solar irradiation, Under simulated three times solar irradiation, CQDs/CuAg/TiO2 exhibits 4.0 and 1.6 times photothermal toluene mineralization activity higher than TiO2 and CuAg/TiO2, respectively. This work provides a cost-effective and scalable approach to designing high-performance photothermal catalysts for VOCs degradation and advancing solar-driven environmental remediation technologies.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Zhenyou Li,Shiqi Zhang,Zijian Li,Haodong Tang,Zongjian Liu
Conventional synthesis of stable metal oxide-encapsulated metal particles typically requires two-stage processing: metal particle formation and oxide coating via a sol-gel method. However, this biphasic protocol is often time-consuming and environmentally unfriendly. Herein, a novel, one-step approach that enables concurrent metal particle formation and oxide encapsulation is proposed to synthesize TiO₂-encapsulated Sn-based particles. The proposed method involves ultrasonic emulsification of molten Sn or Sn alloys (e.g. Sn-Zn-Cu) within a LiCl-KCl-CsCl eutectic melt containing TiO₂ nanoparticles, followed by rapid emulsion solidification and salt matrix dissolution in water. Our results demonstrate that Sn-based capsules with diameters ranging from hundreds of nanometers to several micrometers and TiO₂ shell thicknesses typically in the range of 80–120 nm were successfully synthesized via such emulsion-based system, where the capsule size decreases with the concentration of TiO₂ nanoparticles. The as-prepared Sn-2.0Zn-1.5Cu (in wt%) phase change capsules exhibit significantly reduced undercooling (∼7 °C vs. ∼88 °C for Sn capsules of comparable size) and their phase change properties remain stable after 300 thermal cycles, thereby showing great potential for thermal energy storage applications. With short emulsification durations (<10 min) and recyclable chloride salts, this Pickering-type metal-in-salt emulsion methodology might serve as a new pathway for rapid and environmentally friendly synthesis of metal-based micro/submicro-capsules across diverse material systems by varying metal alloy compositions and selecting suitable nanoparticle stabilizers.
✓ 已验证
产品关联
DOI
高影响因子
THIN SOLID FILMS
·
2020
·
IF 2.03
Lixin Song,Piaopiao Chen,Zhaowu Li,Pingfan Du,Yefeng Yang,Ni Li,Jie Xiong
Flexible counter electrode (CE) is a key to develop flexible dye-sensitized solar cells (DSSCs). To obtain flexible CE with well electro-catalytic activity, the carbon nanotubes (CNTs) were employed to modify the flexible TiO 2 /C nanofibrous film. All the CNTs/TiO 2 /C nanofibrous film with incorporation of CNTs into TiO 2 /C nanofiber showed pleasurable flexibility. In addition, the specific surface area, the conductivity, and the electro-catalytic activity of the nanofibrous film increased as the content of CNTs increased, reaching the largest values before decreasing. The CNTs/TiO 2 /C nanofibrous film with 2% of CNTs incorporation possessed optimal electro-catalytic activity. Therefore, the conversion efficiency of the flexible quasi-solid DSSCs based on the nanofibrous film CE was greatly enhanced and the highest conversion efficiency of about 3.4% was achieved. Besides, the properties of the CNTs/TiO 2 /C nanofibrous film almost remained constant after 50 cycles with the bending radius of 1 mm and the twisting angle of 10π, implying that it exhibited excellent bending stability and twisting stability. The flexible CNTs/TiO 2 /C nanofibrous film has a huge potential in flexible devices.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）