CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yifang Sun,Xiongwei Yang,Hao Zhou,Xinxin Zhao,Yao Shen,Jingkai Zhao,Jiexu Ye,Chenghang Zheng,Shihan Zhang,Xiang Gao
CO 2 emissions from industrial processes are becoming a growing global concern due to their impact on climate change. Catalyst-aided amine solvent regeneration is an effective approach for achieving low-energy carbon capture. Existing desorption catalysts regenerate amine solutions by accelerating proton transfer during CO 2 desorption, but limited proton transfer efficiency under alkaline conditions leads to inevitable deactivation of active sites. Herein, we developed TiO 2 /Ti 3 C 2 , a TiO 2 nano-islands structured catalyst via in situ oxidation of Ti 3 C 2 T x MXene nanosheets. The remaining MXene enhances electron transfer between TiO 2 nano-islands, promoting CO 2 desorption-induced solvent regeneration through proton-coupled electron transfer effect via Raman spectroscopy and low-temperature electron paramagnetic resonance experiments. Theoretical calculation demonstrates that TiO 2 /Ti 3 C 2 reduce the energy barrier of solvent regeneration by 44.9 % compared to the non-catalytic scenario. The CO 2 desorption rate increased by 150 %, while the relative energy penalty of the solvent regeneration decreased by 75 %. The regeneration temperature was reduced from 120 °C to 98 °C with an amine-based biphasic solvent, effectively preventing ~28 % of amine degradation. Additionally, TiO 2 /Ti 3 C 2 demonstrates exceptional stability, showing negligible performance degradation and structural changes after 10 cycles. This work offers valuable insights for designing catalysts to achieve efficient and robust CO 2 capture.
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高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jingjing Ren,Taolin Zhang,Shouzheng Jiao,Fanghua Pan,Jingru Sun,Ran Mo,Yuwei Hao,Zhengyu Chen,Siqiao Zhang,Zhicheng Sun,Zhongjun Cheng
This study reports a novel core-shell structured microcapsule system, in which 2-hydroxyethyl methacrylate is used as the core material and Ethyl cellulose (EC) as the shell. Titanium dioxide (TiO 2 ) nanoparticles were electrostatically assembled onto the microcapsule surface and subsequently grafted with polydimethylsiloxane (PDMS) under UV irradiation, forming PDMS-functionalized TiO 2 -ethyl cellulose microcapsules (PDMS-TECM). These microcapsules were uniformly embedded within an epoxy matrix to construct a robust and intelligent coating. The incorporation of TiO 2 significantly enhanced the thermal stability, mechanical strength, and UV-induced thermal effects of the coating, enabling rapid crack closure under UV exposure. Simultaneously, the photocatalytic activity of TiO 2 enabled the degradation of organic pollutants, while the grafted PDMS chains imparted surface hydrophobicity and antifouling properties. The synergistic integration of UV-induced thermal self-healing, photocatalytic cleaning, and hydrophobic surface functionality provides a multifunctional strategy for the development of next-generation self-sustaining coatings suitable for harsh environments.
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CERAMICS INTERNATIONAL
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2025
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IF 5.6
Minghui Sun,Xiangqian Quan,Xi Ma,Hetuo Chen,Xianpeng Qin,Guohong Zhou
The effects of TiO 2 content and sintering temperature on the electrical and mechanical properties of the alumina ceramics prepared via vacuum sintering were investigated. The sample comprises the phases of Al 2 O 3 , MgAl 2 O 4 , and Al 2 TiO 5 . Under vacuum sintering conditions, oxygen atoms in TiO 2 detach from the crystal lattice, forming quasi-free electrons, oxygen vacancies and Ti 3+ , thereby reducing the volume resistivity of alumina ceramics. XPS (X-ray photoelectron spectroscopy) analysis revealed that the increasing TiO 2 content facilitates the transformation of Ti 4+ to Ti 3+ , while elevated sintering temperatures further enhance Ti 3+ concentration, attributed to the enhanced lattice activity of TiO 2 . The increasing TiO 2 generated more Al 2 TiO 5 with Al 2 O 3 , which accumulated at grain boundaries, inhibiting grain growth through a pinning effect and forming more uniform and smaller grains, thereby enhancing mechanical property. Optimal comprehensive properties were achieved at a sintering temperature of 1500°C with 6 % TiO 2 content, demonstrating a density of 3.88 g/cm 3 , volume resistivity of 1.2×10 11 Ω·cm, dielectric strength of 3.6×10 6 V/m, hardness of 14.4 GPa, and thermal conductivity of 17 W/(m·K). The series of outstanding performances confirm that Al 2 O 3 ceramic with TiO 2 doping is an excellent candidate material in advanced semiconductor processing.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 11
·1-16
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IF 2.4
Yao Liang,Wang Hao,Li Shuangde,Chen Yunfa
Sulfur dioxide (SO 2 ) emissions, a major source of air pollution, can be effectively mitigated through catalytic reduction to elemental sulfur using carbon monoxide (CO). In this study, Fe loaded TiO 2 catalysts were synthesized and subsequently subjected to pre-sulfurization treatment under varied conditions. Their catalytic performance was evaluated in SO 2 reduction for thermal and dielectric barrier discharge (DBD) plasma enhanced thermal catalysis. The results showed that OFS-Fe/TiO 2 catalyst with oxygen-free sulfurization (OFS) treatment exhibited the highest catalytic activity, achieving above 90% SO 2 conversion between 250 and 550 °C under oxygen-assisted reaction (OAR), along with long-term stability under 40–60% water vapor. However, the SO 2 conversion were below 20% for Fe/TiO 2 and oxygen-assisted sulfurization OAS-Fe/TiO 2 catalysts within 250 to 400 °C. Notably, the significantly enhanced catalytic performance of the OFS-Fe/TiO 2 catalyst was probably attributed to the high dispersion of Fe over nano-TiO 2 , the lower Fe 2+ /Fe 3+ ratio, and the formation of active FeS 2 species detected by SEM-EDS, XPS and TPD techniques. Furethermore, a conversion efficiency exceeding 90% was maintained throughout 80 to 550 °C under DBD plasma reaction over POFS-Fe/TiO 2 catalyst with room-temperature DBD plasma oxygen-free sulfurization treatment, surpassing thermal catalysis performance. The significantly enhanced low-temperature activity of plasma catalysis was attributed to the lowest Fe 2+ /Fe 3+ ratio, together with the transformation of FeS 2 into FeS, generating more sulfur vacancies. In-situ DRIFTS experiments confirmed two distinct SO 2 adsorption and reduction mechanisms between Fe/TiO 2 and OFS-Fe/TiO 2 catalysts. The results demonstrate that pre-sulfurization and plasma modification serve as an effective catalytic strategy to enhance CO-mediated SO 2 reduction, offering a sustainable emission control approach through sulfur resource utilization. Graphical
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Acta Biomaterialia
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2025
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IF 9.6
Zhizi Ma,Zhuang Yang,Jie Ma,Sainan Liu,Qi Meng,Wenying Zhang,Ziyong Cheng,Zhangfeng Wang,Abdulaziz A. Al Kheraif,Ping’an Ma,Jun Lin
With the deepening of research of sonodynamic therapy (SDT), it is shown that the efficacy of single component and single functional sonosensitizers is not satisfactory. Therefore, this study utilized multihole TiO 2 @Ag 2 O (TA) as sonosensitizer to achieve synergetic SDT and sonothermal therapy (STT) under US irradiation. As a p-n nanoformulation, the construction of TA is conducive to generate a built-in electric field and lead to energy band bending, which are efficient in separating electrons and holes. Besides, it can promote carrier relaxation between the different energy bands to produce abundant phonons, inducing lattice thermal vibration and realizing the conversion of mechanical energy to thermal energy. Moreover, the feasibility of enhancing cavitation effect for improving sonothermal capability is demonstrated for the first time. When TA enters tumor cells under US irradiation, plentiful ⚫OH and 1 O 2 are generated to attack mitochondria, causing dysfunction, disrupting energy supply and damaging DNA, thereby inducing apoptosis. Meanwhile, TA can also cause rapid local heating of surrounding environment to kill tumor cells by lattice thermal vibration and cavitation bubbles bursting on its surface. Obviously, this work effectively achieves both heterojunction enhanced SDT, and carrier relaxation and cavitation effect promoted STT combined anti-tumor therapy through designing multihole p-n TA. Statement of Significance None
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Long Jiang,Hao Deng,Heng Yang,Pengliang Liang,Shuying Shi,Minyan Yang,Yanyan Chen,Jing Yin,Ailin Yang,Yan Liu,Ying Xiong
Rhenium (Re), as a high-value metal, plays a significant role in many strategic fields, but not has independent mineral sources worldwide and mainly exists as an associated with other mineral resources. The associated rhenium in uranium (U) ore is of great concern. Herein, we propose a novel photocatalytic strategy to extract rhenium from mixed waste liquid after uranium mining. A typical bronze phase TiO 2 (B) photocatalyst was prepared by a simple hydrothermal treatment method, and were characterized by various spectroscopic techniques. The special energy band and morphology of TiO 2 (B) facilitate the photogenerated carrier separation and transfer. The photocatalytic performance of the material for Re(VII) in the absence or presence of U(VI) was investigated. The results indicate that under the irradiation of simulated sunlight, TiO 2 (B) can completely extract rhenium from the rhenium/uranium mixed waste liquid with a concentration of 0.1–1 mg L −1 Re(VII) at pH = 0, and then sequentially extract U(VI) (10 mg L −1 ) at pH = 5 through adsorption and photocatalysis. After photocatalytic reaction, soluble Re(VII) was reduced to Re(VI), and then disproportionated to insoluble Re(IV). Compared with the reported photocatalysts, the photocatalytic Re(VII) reduction on TiO 2 (B) was directly achieved only by photogenerated electrons. The advantage of TiO 2 (B) lies in its wider bandgap and more negative conduction band potential, which makes the extraction of rhenium from aqueous solution through a feasible and green photocatalytic pathway.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Wanyu Li,Muzi Liu,Xiangyu Xin,Yu Xiao,Jinping Li,Guang Liu
MgH 2 is recognized as an exceptionally promising solid-state material for hydrogen storage, but its high thermodynamic stability, slow kinetics, and cycling-induced particle coarsening remain major obstacles to practical application. In this study, a composite oxide catalyst, Nb 2 O 5 @TiO 2 -C, was synthesized via a hydrothermal route by loading nano-Nb 2 O 5 onto a TiO 2 -C support derived from a Ti-based metal- organic framework. Doping with Nb 2 O 5 @TiO 2 -C markedly enhances the hydrogen storage performance of MgH 2 . Carbon within the support effectively suppresses nanoparticle agglomeration, while the catalyst is partially reduced to low-valence species during de/rehydrogenation cycles, both contributing to the enhanced performance. The MgH 2 -7 wt.% Nb 2 O 5 @TiO 2 -C composite starts dehydrogenating at 210.6 °C. At 300 °C, it rapidly releases over 6 wt% hydrogen within 5 min. The dehydrogenated sample also exhibits fast absorption kinetics, absorbing 6 wt% hydrogen within 1 min at 200 °C under 30 bar H 2 . Moreover, the system shows excellent cycling stability, retaining a hydrogen capacity of 6.6 wt% after 20 cycles.
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Journal of Water Process Engineering
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2026
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IF 6.7
Tariq Ali,Yiwei Li,Yuxian Wu,Yuke Zhang,Bingjie Fang,Saleem Raza,Ruidi Chen,Yeyuan Xiao
Photocatalytic technology offers a promising solution for degrading organic pollutants in wastewater. However, catalysts often suffer from limited light absorption and rapid electron-hole recombination. To address the challenges, we developed a heterogeneous TiO 2 /CoAl-LDH catalyst for photocatalytic degradation of dyes such as Acid fuchsin (AF) and methyl orange (MO) and real wastewater under UV light irradiation. The aligned band structures of TiO 2 and LDH enhanced UV light energy absorption and electron-hole separation, resulting in superior photocatalytic activity. In treating real dyeing wastewater, TiO 2 /CoAl-LDH + H 2 O 2 + UV achieved higher decolorization than UV/H 2 O 2 or catalyst/H 2 O 2 alone under the same operating conditions. The process within the early stage (0–45 min) followed pseudo-first-order kinetics (kₐₚₚ ≈ 1.50 × 10 −2 min −1 ), with a clear H 2 O 2 optimum at 40.8 mM. Excitation–emission matrix (EEM) fluorescence showed rapid quenching of protein-like (B/T) and humic/fulvic-like (A/M/C) peaks with blue-shifts under the TiO 2 /CoAl-LDH + H 2 O 2 + UV condition corroborating deeper oxidation and mirroring the ADMI decolorization trend (fast loss of B/T within 15 min, followed by progressive depletion of humic-like emission). This study presents a simple and cost-effective method for developing efficient hierarchical semiconductor materials potentially applicable as photocatalysts for wastewater treatment.
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Green Energy & Environment
·
2026
·
IF 14.6
Chunxia Wang,Yanxin Sun,Zhuo Wang,Yifeng Zeng,Qin-Yi Li,Xinchen Kang,Guoyong Huang
Copper (Cu) doping modifies the band structure of TiO 2 by slightly narrowing the bandgap and shifting the Fermi level, while creating localized states that serve as temporary electron reservoirs to suppress carriers rapid recombination. On this basis, a ternary heterojunction Cu-TiO 2 /g-C 3 N 4 (Cu-CT) was constructed by anchoring Cu-TiO 2 onto g-C 3 N 4 nanosheets. The synergistic interaction between Cu-doping and the S-scheme interfacial configuration generates an internal electric field that promotes vectorial carrier migration, enabling electrons in the conduction band of Cu-TiO 2 and holes in the valence band of g-C 3 N 4 . This spatial separation preserves strong redox potentials and markedly suppresses recombination. Consequently, Cu-CT achieves a hydrogen evolution rate of 10.21 mmol g -1 h -1 , more than twenty times higher than pristine TiO 2 . In-situ XPS, KPFM, and DFT analyses collectively validate the S-scheme charge-transfer pathway and highlight the synergistic role of Cu doping with heterojunction engineering, providing mechanistic insights to the rational design of advanced ternary photocatalysts for efficient solar-driven hydrogen production.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.6
Jinxu Song,Jiangwen Xu,Haotian Li,Hui Song,Hongyi Li,Jinshu Wang
The corrosion protection performance differences between TiO 2 nanotubes of varying diameters combined with the same corrosion inhibitor were investigated. TiO 2 nanotube arrays with distinct diameters were grown in-situ on a titanium substrate by adjusting the anodic oxidation voltage. Subsequently, a stearic acid composite coating was formed on the array surface via a chemical bath process. The electrochemical corrosion resistance, fouling resistance, and self-healing behavior of this superhydrophobic composite coating were comprehensively evaluated in both air and solution environments. In-situ monitoring of surface corrosion evolution at different interfaces in 7 days was performed using scanning vibrating electrode technology. Results indicate that, under identical corrosion inhibitor loading, the coating's corrosion protection performance is significantly influenced by TiO 2 nanotube diameter. Furthermore, the nanotube array exhibits the capacity to store stearic acid, which is released upon coating damage, conferring self-healing properties to the interface in both air and solution environments. This study provides novel insights for the design of corrosion inhibitor carrier structures and self-healing anti-corrosion coatings.
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Functional Materials Letters
·
2019
·
IF 1.388
Lin Zhao,Yanzhao Xie,Qiuyu Lin,Rongze Zheng,Yong Diao
A series of composite catalysts of C, N and P co-doped TiO 2 were prepared by sol-gel method, using a biomass (soluble starch) dopant. The samples were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS), fourier transform infrared (FTIR) spectroscopy. The results show that TiO 2 is co-doped with C, N and P by one step. The resulting composite exhibited higher specific surface area, wider visible-light absorption band with respect to the pure TiO 2 . The sample calcined at 400 ∘ C for 2 h with a doping amount of 6 g soluble starch showed the best electrochemical performance. The C, N and P co-doped TiO 2 was also used for the degradation of methylene blue (MB) and degradation ratio was up to 98% in 80 min under visible light irradiation.
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CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.706
Xuehui Liu,Ma Zheng,Tong Hongtao,Li Kaiwei,Hou Baorong
Smart containers can be produced with polyelectrolyte multilayers that can release inhibitors in response to environmental changes at the coating defects. In this study, mesoporous TiO2 hollow spheres were adopted as carriers for the encapsulation of corrosion inhibitor. The inhibitor-loaded TiO2 containers were modified by polyelectrolyte shells using layer-by-layer self-assembly technology. The release behaviour of the encapsulated inhibitor was investigated using UV–visible spectroscopy. Corrosion protection performance of the epoxy coating with polyelectrolyte-modified TiO2 containers was studied using electrochemical impedance spectroscopy and scanning Kelvin probe (SKP) techniques. Epoxy coating with the polyelectrolyte-modified TiO2 containers provided better barrier properties than that of the blank coating. Waterborne epoxy coating impregnated with the polyelectrolyte-modified TiO2 containers presented a significant self-healing effect after immersion in 0.5 M NaCl solution from the SKP results.
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危险品化学品经营许可证（带存储）