CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lu Liu,Yajie Chen,Jiajia Zhang,Fanze Zeng,Jinyu Bao,Wenpeng Li,Guohui Tian
The rational construction of heterojunctions with surface defects and localized surface plasmon resonance (LSPR) effect is a promising strategy for improving CO 2 photoreduction performance. Herein, the one-dimensional/two-dimensional (1D/2D) S-scheme heterostructures integrated with non-stoichiometric 1D W 18 O 49 nanowires (H-W 18 O 49 NWs) and 2D ultrathin MIL-125(Ti) nanosheets (MIL-125(Ti) NSs) were constructed by self-assembly for photocatalytic CO 2 reduction. In situ X-ray photoelectron spectroscopy (XPS), electron spin resonance spectra (ESR), and photoluminescence (PL) spectroscopy characterizations confirm the construction of S-scheme heterojunction and the solid internal electric field at the heterointerface enables effective spatial charge separation while keeping a strong redox capability. The hot electrons generated from the LSPR effect of visible-near-infrared light-excited H-W 18 O 49 NWs can be injected into MIL-125(Ti) NSs to increase the electron density and accelerate the reaction rate. Thus, the optimized H-W 18 O 49 NW/MIL-125(Ti) NS heterostructure exhibited good performance, achieving a CO yield of 202.37 μmol g -1 h −1 . This study enriches the diversity and architecture of available heterostructures for photocatalytic applications.
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Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Junjing Li,Han Yu,Yongjiao Ding,Liang Wang
In order to improve the metal utilization of the noble metal Pd and the catalytic activity of the reaction, a novel and efficient Pd/Ti 4 O 7 /Ti electrode was prepared by introducing a Ti 4 O 7 intermediate layer for electrocatalytic hydrodechlorination (EHDC) of chlorinated pharmaceuticals and personal care products (PPCPs). The presence of oxygen vacancies (Ov) on the Ti 4 O 7 surface was confirmed by electron paramagnetic resonance (EPR). The results showed that the introduction of Ti 4 O 7 increased the electrochemical active surface area electrode (ECSA) of the Pd/Ti 4 O 7 /Ti electrode, accelerated the electron transfer rate on the catalyst surface, and promoted the generation of electron-rich Pd, which in turn improved the dechlorination efficiency. The Pd/Ti 4 O 7 /Ti electrode had a removal efficiency of 99.6% for florfenicol (FLO) within 180 min. Meanwhile, the removal efficiency of the Pd/Ti 4 O 7 /Ti electrode was still above 95% in seven cycles, which significantly improved the catalytic activity and stability compared with that of the Pd/Ti electrode. In addition, the reaction pathway for the electrocatalytic hydrodechlorination process of FLO at Pd/Ti 4 O 7 /Ti electrode was proposed. The ecotoxicity of the pollutants was also evaluated by the Toxicity Estimation Software Tool (T.E.S.T) model. In this study, an efficient electrocatalyst for EHDC was explored, and the Pd/Ti 4 O 7 /Ti electrode provided strong support for pollutant removal.
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IONICS
·
2025
·
IF 2.6
Lu Lianwu,Guo Shenghui,Hua Yixin,Cheng Mingqiang,Zhang Yinghua,Gao Lei,Ru Juanjian
Brightly saturated oxide films are successfully prepared on Ti sheets surface by anodic oxidation in ethaline deep eutectic solvent (DES) with the regulation of H 2 O content, to enhance the decorative and corrosion resistance. As H 2 O content increases from 0 wt .% to 100 wt .% in the DES, the colored surface of Ti sheets exhibits a highly reproducible and a variety of colors including yellow, brown, red, purple, and blue. The role of H 2 O during the coloring process is discussed to shed light on the deeper causes of the color changes of Ti sheets. There exists a critical H 2 O content, i.e. 20 wt. %, and below this value, it benefits to the increase of bath voltage and the formation of oxide films, reflecting in a regular change in the color of Ti sheets. Above 20 wt. %, some characteristics conferred by ethaline DES may be weakened, so that the color of Ti sheets basically remains unchanged in blue tone. Besides, systematically characterizations of colored Ti sheets demonstrate that non-stoichiometric titanium oxides are formed as a mixture of TiO 2 , Ti 2 O 3 and TiO. The variations in H 2 O content have significant impacts on the surface composition of colored Ti sheets, resulting in an increased O/Ti ratio of the surface oxides and altering the optical properties of the colored films. Furthermore, the EIS and dynamic potential polarization tests show a significant increase in impedance and a decrease in corrosion current density for the colored Ti sheets compared to the untreated, implying an enhancement in corrosion resistance.
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Journal of Cleaner Production
·
2024
·
IF 9.7
Taotao Cai,Ying Zhang,Shili Zheng,Peiyi Yan,Yi Zhang
Titanium is a highly valued material. Developing a lower-cost titanium (Ti) metal powder production process, potentially substituting the conventional Kroll-HDH method, has challenged the titanium community for decades. The ease of aluminum forming alloys with titanium and the strong chemical affinity of titanium to oxygen rule out the possibility of fabricating pure Ti metal directly by aluminum reduction of TiO 2 . Based on the demonstrated enhanced deoxidation of Ti using Mg metal, this paper proposes an Al–Mg combined stepwise reduction of TiO 2 to fabricate Ti metal powder. Critical challenges overcome in this research include predicting reaction thermodynamics and preparing Ti 2 O intermediate by Al reduction of TiO 2 without significant Al alloying, which is made possible by forming mild-acid soluble Ca 12 Al 14 O 32 Cl 2 byproduct. Various Al reduction conditions were investigated and optimized. To the best of our knowledge, it is the first report to fabricate Ti 2 O powder by Al reduction of TiO 2 with a highly stable chemical composition. The difficulty of sintering the Ti 2 O intermediate before Mg deoxidation to reduce the surface oxygen contribution is mitigated by mixing a certain amount of low-oxygen titanium powder with the Ti 2 O powder. This allows the densification temperature to be lowered from 1400 °C for sintering pure Ti 2 O powder to 1100 °C. Even with as much as around 15 wt% oxygen, the sintered powder can be effectively deoxidized by Mg with the help of hydrogen. A titanium metal powder with an oxygen content of 0.134 wt%, an Al content of 0.123 wt%, and other impurities meeting the standard of pure titanium metal powder (GB/T 34486-2017 FTA1) is successfully prepared by the Al reduction-Mg deoxidation combined process. It is a promising alternative for producing titanium metal powder and its derivatives.
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METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
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IF 2.4
Zhu Liguo,Zhang Zuqing,Kong Lingxin,Wang Chengyuan,Yang Bin,Xu Baoqiang
Ti is produced by the Kroll method, mainly by carbothermic chlorination, magnesiothermic reduction, and vacuum distillation, which result in complex processes, low efficiency, and high cost. Although Ti has many excellent properties, its high production costs limit its widespread applications. There is an urgent need to develop new Ti extraction processes to reduce the cost of Ti production. In this study, we propose a new method for the direct preparation of low-oxygen Ti powder from TiO 2 using Mg as a reducing agent and the formation of CeOCl (2Mg ( l ) + TiO 2 ( s ) + 2CeCl 3 ( l ) = Ti ( s ) + 2CeOCl ( s ) + 2MgCl 2 ( l )). First, a deoxidization experiment of Ti with Mg as a deoxidizer was conducted, and the ability of Mg to deoxidize Ti was demonstrated. At 1273 K, when the activity of CeCl 3 was 1, the oxygen concentrations of Ti-A and Ti-B were 380 and 270 ppm, respectively. Subsequently, the TiO 2 reduction experiment was conducted using Mg as the reducing agent. The results showed that MgO activity was effectively reduced by the formation of CeOCl (MgO( s ) + CeCl 3 ( l ) = MgCl 2 ( l ) + CeOCl( s )). When the system reached the Mg/MgCl 2 /CeOCl/CeCl 3 equilibrium, low-oxygen Ti powder below 1000 ppm was directly produced from TiO 2 .
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WATER ENVIRONMENT RESEARCH
·
2025
·Vol. 97
·期 3
·e70057
·
IF 1.9
Bin Zheng,Haixia Wu,Min Zhang,Shaohua Lin
As microplastic pollution in aquatic ecosystems continues to rise, research on wastewater treatment methods designed to address microplastics has gained significant attention. To reduce the power consumption of electrocoagulation, this study presents an approach using Ti–Al electrode under pulsed current conditions to address polystyrene (PS) microplastic contamination in wastewater. After selecting the appropriate electrode materials and shapes, we conducted a comprehensive investigation into the effects of various operational parameters—such as initial solution pH, electrolyte concentration, current density, pulse frequency, and pulse duty cycle—on PS removal efficiency. Under optimal conditions (electrode spacing of 1 cm, current density of 4 A·m −2 , pulse duty cycle of 40%, pulse frequency of 500 Hz, initial solution pH of 7, and electrolyte concentration of 0.05 mol·L −1 ), the removal efficiency of PS reached 93.24%, with a power consumption of 0.00977 kWh·mg −1 . Analysis of the resulting flocs revealed that free radicals generated during the electrocoagulation process disrupted the microplastic surfaces and facilitated the formation of Ti and Al flocs, which ultimately removed the microplastics through a combination of adsorption, electro-neutralization, and capture mechanisms. This study demonstrates the effectiveness of Ti electrode electrocoagulation for treating microplastic-laden wastewater and provides valuable insights for advancing microplastic treatment technologies. Practitioner Points Using pulse current electrocoagulation to remove polystyrene microplastics from wastewater. Titanium electrodes outperforms traditional electrodes ()in terms of efficiency and energy consumption. The mechanism for removing polystyrene microplastics using titanium electrodes in pulse current electrocoagulation was proposed. Titanium electrode electrocoagulation is effective in removing microplastics from wastewater and provides a reference for actual wastewater treatment. Graphical Titanium complexes such as Ti 4+ , Ti 3+ , Ti (OH) 2 + , and Ti (OH) 3 + generate during the electrocoagulation process, while alongside aluminum complexes like Al 3+ , Al (OH) 2+ , and Al (OH) 2 + generate. These positively charged species engage in charge neutralization with negatively charged microplastic particles. In addition, [Ti (OH) 4 ] n and [Al (OH) 3 ] n flocculants remove polystyrene particles via adsorption, net trapping, and rolling actions owing to their increased surface functional groups and larger specific surface area.
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高影响因子
ACS Omega
·
2025
·
IF 4.3
Tianzeng Zhao,Xinxin Peng,Zhongpeng Zhu,Zhaolin Fu,Xiangyu Wang,Dandan Jia,Weiping Zheng,Jie Zhao,Zhiping Tao,Xingtian Shu
The pore-expanding modification of zeolites is an important means to improve their catalytic performance. This study demonstrates the postsynthesis of Ti-Sil-BEA zeolites via silanization-modified parent BEA zeolite and its application in catalyzing epoxidation reactions of dicyclopentadiene (DCPD). The zeolites were characterized by BET, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–vis spectroscopy, and X-ray electron spectroscopy. The impact of silanizing reagents on the crystallization of BEA zeolites as well as pore-expanding was studied. It is revealed that the addition of N-[3-(Trimethoxysilyl)propyl]ethylenediamine (TSPED) before crystallization of *BEA-type zeolites can effectively introduce mesoporous structures without impacting the integrity of the zeolite crystals (resulting in an augmentation of the mesopore volume by 55% and emergence of mesopores with a diameter of 11 nm). Furthermore, the introduction of TSPED led to the reduction of zeolite size, and the change of the mesoporous structure of Ti-Sil-BEA improved its catalytic performance for the DCPD epoxidation reaction; the DCPD conversion was increased by 11.5%. The dicyclopentadiene dioxide (DCPDDO) selectivity was increased by 52.5%.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 24
·1-13
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IF 2.8
Rafiq Muhammad Nasir,Dai Zhonghua,Zheng Yuanyuan,Li Xujun,Liu Chenxi,Zhao Xin,Cong Yu,Gu Shuitao
The performance of lead-based ceramics in energy storage applications is often hindered by their low energy density and inadequate phase transition properties. The (Pb, La) (Zr, Sn, Ti)O 3 (PLZST) antiferroelectric ceramics have attracted much attention as energy storage materials. In this work, ceramics Pb 1−1.5 x La x (Zr 0.93 Sn 0.05 Ti 0.02 )O 3 at ( x = 0.015, 0.025, 0.035, and 0.045) were prepared using a solid-state method, and their dielectric and energy storage characteristics were studied. It was observed that integrating lanthanum significantly improved the perovskite structure, reducing grain size and boosting the polarization intensity. In this present study, a recoverable energy storage density ( W rec ) of 6.24 J/cm 3 was achieved under an electric field of 270 kV/cm. Moreover, these ceramics demonstrated an impressive discharge energy density ( W dis ), with 90% of the energy released within 1.29 μs. The outcomes show that PLZST is a highly effective material for advanced energy storage, pulse power applications, and paving the way for technological advancements.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Jinqiang Fu,Fenglan Liang,Wenjing Zhong,Tao Kuang,Ziyuan Yin,Yongshi Li,Zhenggui Huang,Hongli Liu,Deyun Ma
Establishing a simple and consistent strategy to adjust the photocatalyst surface to improve the photocatalytic performance is crucial but remains challenging. Herein, a photocatalyst of TiO 2 -Q-Pd is obtained through one-step quenching of TiO 2 (derived from NH 2 -MIL-125(Ti)) into an aqueous solution of sodium tetrachloropalladium, which displayed a significant improvement in photocatalytic activity, achieving 97 % tetracycline degradation within 60 min and 95 % mineralization at 5 h. The mineralization reaction rate (0.6321 h −1 ) was 2.75 times that of the commercial TiO 2 . Our findings show that quenching leads to the creation of numerous zigzag surfaces and the near-surface palladium atom doping, therefore adjusting the chemical environment of Ti, which accelerates electron-hole pair separation and transfer, and thereby improves the photocatalytic performance. This finding introduces a novel approach to activating metal oxide catalysts derived from MOFs and expands the role of quenching chemistry in catalytic processes.
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高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Yinxuan Liang,Guohuang Kang,Yanru Liu,Jinhui Zhang,Yao Lv,Kangning Cai,Yilei Zhang,Feiyu Kang,Yidan Cao
Lithium-rich manganese-based cathode materials, as promising candidates for next-generation high-energy-density lithium-ion batteries due to their high specific capacity (>250 mAh g −1 ) and cost-effectiveness, are limited by severe capacity decay and voltage fade driven by irreversible structural transitions and oxygen release during cycling. Here, we report a Ti/Si dual-element modification strategy for cobalt-free Li 1.2 Ni 0.2 Mn 0.6 O 2 (LNMO) cathodes. The Ti/Si co-modified TS-LNMO cathode demonstrates superior structural stability and electrochemical performance. Bulk Ti 4+ doping stabilizes the oxygen framework via robust Ti–O bonds and enhances the lattice oxygen redox reversibility, while an in situ formed Li 2 SiO 3 layer suppresses interfacial side reactions, enhances lithium-ion diffusion, and prevents HF-induced erosion. As a result, the TS-LNMO cathode achieves 90% capacity retention after 200 cycles at 0.5 C and maintains ∼80% capacity in full cells cycled to 4.8 V. Additionally, the TS-LNMO cathode exhibits impressive rate performance even at a high rate of 5 C. This work offers an effective strategy for advancing cobalt-free, high-performance lithium-rich cathodes for sustainable energy applications.
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CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Hongyu Wang,Fumin Wang,Kaiwei Wang,Xubin Zhang,Changhao Bing,Xiaolu Fan,Tongxue Zhang,Syed Mujtaba ul Hassan
Developing an approach for the efficient synthesis of TS-1 zeolites with desirable morphologies and tunable coordination environments for Ti active sites is a pivotal challenge in the design of high-performance catalysts and zeolite crystal engineering. Herein, we report a cost-effective and efficient additive, guanidinoacetic acid (GAA), and conduct a systematic study on the synthesis of plate-like TS-1 zeolites using GAA as an additive. Introducing GAA during hydrothermal synthesis not only modulates the morphology of TS-1 crystals but also permits GAA to adequately chemically interact with titanium precursors to form hexa-coordinated Ti species. TS-1 zeolites with a controllable b-axis thickness in the range of 80–110 nm, and abundant framework Ti and hexa-coordinated Ti species are successfully achieved by optimizing the synthetic parameters. Through SEM, FT-IR, XPS, TEM, and XRD analysis, the mechanism of GAA altering crystal growth is mainly to inhibit the growth of the (010) plane. A b-axis-oriented TS-1 zeolite enriched with hexa-coordinated Ti species displays better catalytic performance in the 1-hexene epoxidation reaction than the conventional TS-1 zeolite containing only framework Ti species (35 vs 24%). This can be ascribed to the more active hexa-coordinated Ti species and shorter diffusion distance. This synthetic strategy provides a way to change the zeolite morphology and tune the number and distribution of Ti species in TS-1 zeolites.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Pengfei Wang,Yanyan Li,Bo Fan,Bin Yang,Liangdong Lin,Chen Bao,Qinghai Ma,Gaofeng Li,Dianbo Ruan
A series of Ti-doped Na 3 V 2 (PO 4 ) 2 O 2 F materials were synthesized through a controlled coprecipitation method with precise Ti content regulation. Experimental results indicate that a 15 wt% Ti doping level (NVTOPF-0.15) optimally enhances electrochemical performance, yielding an initial discharge capacity of 119.3 mAh g −1 at 0.2C and retaining 84.3 % of its capacity after 2000 cycles at 5C. Titanium doping exerted a dual-functional effect: streamlining the synthesis pathway through synergistic coprecipitation with controllable particle size and enhancing the lattice substitution of Ti 4+ for V in VO 6 octahedra. This substitution refined the crystal structure and enhanced Na + diffusion kinetics. Titanium doping-induced structural reconstruction led to a reduction in particle size, thereby facilitating the electrochemical reaction kinetics. Additionally, using a combination of the Randles-Sevcik equation and theoretical calculations, it was found that titanium doping significantly increased the Na + diffusion coefficient and decreased the band gap. This study presents a dual-functional titanium-doping approach for high-rate and long-life sodium-ion cathode materials. The synthesis of NVTOPF via the co-precipitation method will provide new guidance for the development and application of positive electrode materials in sodium-ion batteries.
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