CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuangchun Jiang,He Tao,Yingjuan Shao,Yao Fu,Wenqi Zhong
The pressurization can significantly enhance the thermochemical energy storage performance of Ca-based materials. In this study, detailed experimental investigations were conducted in both fixed bed and fluidized bed on the performance of TiO 2 modified Ca-based materials ranged from 700 °C to 900 °C under pressurized conditions (0.1 MPa to 0.8 MPa) from powder to pellet, including the influence of inert dopants on the properties of CaO powder, the optimization of biomass pore-former agents' selection and the enhancement of pressurized fluidization states on the performance of pelletized materials. The findings indicated that the pressure intensity has a positive correlation with the energy storage density and cyclic stability of TiO 2 modified Ca-based materials. The results demonstrated that the properties of CaO powder intensified with the pressure and the energy storage density was increased by 31.4 % with 5 % TiO 2 doped at 0.8 MPa. And the energy storage performance of the pelletized CaO-5TiO 2 with 10 % bagasse added was also significantly improved at a higher-pressure condition. The energy storage performance of the determined 10B-CaO-5TiO 2 pellet under fluidization conditions at 0.8 MPa was 38.9 % higher than that of atmospheric pressure after 10 cycles. As the carbonation pressure increased, the average grain size of CaO exhibited a decline of 7.0 %, a slighter sintering and deeper reaction region were observed into the determined pellet. Furthermore, the specific surface area and pore volumes of the 10B-CaO-5TiO 2 pellets under high carbonation pressure were 382.8 % and 460.0 % higher than that of atmospheric pressure in the fluidized bed, respectively.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Zihan Huang,Zhixuan Zhang,Yifeng Han,Liya Rong,Hongling Yao,Changwen Li,Xianbao Wang,Tao Mei
The practical application of high-performance lithium‑sulfur batteries (LSB) was primarily hindered by polysulfides shuttling and sluggish sulfur redox kinetics. To overcome these limitations, this study introduces a multifunctional three-phase heterostructured TiO 2 /ZnS@MXene catalyst engineered to synergistically combine high adsorption capacity and strong catalytic activity. The TiO 2 component, known for its' strong chemical affinity and ZnS, serving as an efficient electrocatalyst, were homogeneously anchored onto the highly conductive MXene substrate via in situ growth. Additionally, the MXene hollow microsphere structure effectively inhibited the self-stacking of lamellar host to ensure the maximum exposure of the active sites, providing a favorable buffer space for the volume expansion throughout the reaction process. The elaborately integrated TiO 2 /ZnS@MXene heterostructure provides a synergistic effect to realize the function of sequential capture-diffusion-transformation of sulfur species throughout the reaction process. As a result, the LSB containing TiO 2 /ZnS@MXene heterostructures could retain 821.7 mAh g −1 after 1000 cycles at 1C with only 0.010 % capacity decay per cycle. Even with a sulfur content of 5.8 mg cm −2 and lean electrolyte conditions (5.1 μL mg −1 ), it still delivers an area capacity of 4.1 mAh cm −2 at 0.2C.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Jiming Zeng,Hanyu Shi,Qian Wang,Chengchen Wang,Yukun Wang,YaXin Zhou,Guobin Yang,Jun Li,Giuseppe Mele,Chen Wang
Photocatalytic water splitting for hydrogen production and the degradation of organic pollutants are regarded as promising strategies to address the current energy crisis and environmental issues. As a wide-bandgap metal oxide, TiO 2 is characterized by low catalytic activity and a narrow range of light absorption when used alone, whereas its combination with narrow-bandgap semiconductors has been shown to lead to a significant enhancement in catalytic performance. In this study, CdS–TiO 2 composites were synthesized via a ball-milling method, after which Pt–Pd nanoparticles were deposited by photodeposition. The noble metals were found to interact with CdS and TiO 2 respectively, while a synergistic catalytic effect between Pd and Pt was also observed. The photocatalytic efficiency was further extended by the formation of CdS–TiO 2 heterojunctions, resulting in a significantly enhanced hydrogen production rate of 4656.99 μmol h −1 g cat −1 in the ternary system. Moreover, the composite demonstrated significantly enhanced performance in the photocatalytic reduction of 4-NP, The Pt–Pd NPs/CdS-Vo-TiO 2 photocatalyst achieved a 95.2 % conversion rate for 4-NP within 2 min, also demonstrating high photocatalytic activity.
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MOLECULES
·
2025
·Vol. 30
·期 6
·1306
·
IF 4.6
Yu Ren,Rui Luan,Ziyao Zhao,Lina Tang,Chunxia Wang,Yuehui Li,Meixian Li
To fabricate recyclable catalytic materials with high catalytic activity, Se4+@TiO2photocatalytic materials were synthesized by the sol–gel method. By introducing free radicals on the surface of polyester (PET) fabrics through plasma technology, Se4+@TiO2/PET composite photocatalytic materials with high photocatalytic activity were prepared. The surface morphology, crystal structure, chemical composition, and photocatalytic performance were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible absorption spectroscopy (UV–Vis), and photoluminescence spectroscopy (PL), respectively. The photocatalytic degradation performance was determined by assessing the degradation of azo dye methyl orange under simulated solar irradiation. The results demonstrated that Se4+@TiO2/PET exhibited a superior degradation rate of methyl orange, reaching up to 81% under simulated sunlight. The PL spectra indicated that the electron–hole pair separation rate of Se4+@TiO2/PET was higher than that of TiO2/PET. Furthermore, UV–Vis spectroscopy demonstrated that the relative forbidden band gap of Se4+@TiO2/PET was determined to be 2.9 eV. The band gap of Se4+@TiO2/PET was narrower, and the absorption threshold shifted toward the visible region, indicating a possible increase in its catalytic activity in simulated solar irradiation. In addition, the antibacterial properties of Se4+@TiO2/PET were subsequently investigated, achieving 99.99% and 98.47% inhibition againstS. aureusandE. coli, respectively.
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ChemCatChem
·
2025
·
IF 3.9
Yu Tang,Kaiyang Xu,Lingfeng Weng,Yuanjie Xu,Li Tan,Lizhi Wu
Cyclopentanone (CPO) is a high-value platform chemical widely used in fuel, fragrances, and polymers, yet its sustainable production from biomass remains challenging. This work addresses this gap by developing efficient Ni/TiO 2 catalysts through crystal phase engineering of TiO 2 supports (anatase, rutile, mixed-phase P25) for aqueous-phase hydrogenative ring-rearrangement of furfural (FAL) to CPO. Crucially, the TiO 2 phase dictates the Ni–O–Ti interface structure, governing nickel speciation and reactivity. Ni supported on mixed-phase P25 achieves exceptional performance under industrially relevant conditions: 91.1% FAL conversion, 89.3% CPO selectivity, and specific rate of 71.6 h −1 , surpassing catalysts on pure anatase (9.1% conversion) or rutile (55.8% conversion). Physical mixture experiments confirm this superiority stems from the intrinsic interface of P25, not component blending. Characterization reveals that P25 stabilizes a multifunctional surface ensemble: metallic Ni⁰ (18.0% by XPS) enables hydrogenation, while cationic Ni 2+ facilitates acid-catalyzed dehydration and ring rearrangement. Simultaneously, sufficient metal–support interaction permits in situ regeneration of active sites. The optimized 1Ni/P25 demonstrates robust stability over five cycles with retained selectivity (>90%), showcasing practical durability. This study provides a scalable design strategy—support crystal phase tuning—to engineer cost-effective, multifunctional catalysts for industrial biomass upgrading, advancing green manufacturing of cyclic ketones without precious metals. Graphical This study investigates how the TiO 2 crystal phases (anatase, rutile, and P25) affect Ni-based catalysts in the conversion of furfural (FAL) to cyclopentanone (CPO). Ni/TiO 2 -P25 shows superior performance: 91.1% FAL conversion and 89.3% CPO selectivity, outperforming that on anatase and rutile. It stabilizes mixed-valence Ni (Ni° for hydrogenation, Ni 2+ for acid-catalyzed steps) via unique Ni–O–Ti interfaces, enabling efficient FAL conversion.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 26
·1-16
·
IF 2.8
Wei Qian,Zheng Meng
Microplastics (MPs) pose significant environmental and health risks, and conventional disposal methods often suffer from inefficiency and potential ecological harm. Photocatalytic degradation has emerged as a promising solution. However, traditional TiO 2 -based photocatalysts are limited by high electron–hole recombination rates, narrow visible light absorption, and poor reusability. In this study, we develop and optimize a Fe 3 O 4 @TiO 2 /Ag nanocomposite for the efficient degradation of polyethylene (PE) MPs with facile recovery. The synergistic integration of Fe 3 O 4 and Ag with TiO 2 enhances visible light absorption and mitigates charge carrier recombination. Notably, the Fe 3 O 4 @TiO 2 /Ag nanocomposite exhibits a degradation efficiency of 15.54%, outperforming Fe 3 O 4 @TiO 2 (12.63%) and pristine TiO 2 (1.15%). Moreover, the composite maintains its performance over five consecutive cycles, underscoring its durability. The degradation efficiency of Fe 3 O 4 @TiO 2 /Ag was further optimized using response surface methodology. Overall, the developed Fe 3 O 4 @TiO 2 /Ag nanocomposite exhibits excellent photocatalytic efficiency, magnetic recoverability, and long-term stability, highlighting its potential for practical applications in mitigating microplastic pollution.
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ADVANCED MATERIALS
·
2019
·Vol. 31
·期 8
·1806095
·
IF 25.809
Wanpei Hu,Weiran Zhou,Xunyong Lei,Pengcheng Zhou,Mengmeng Zhang,Tao Chen,Hualing Zeng,Jun Zhu,Songyuan Dai,Shihe Yang,Shangfeng Yang
Titanium oxide (TiO 2 ) has been commonly used as an electron transport layer (ETL) of regular-structure perovskite solar cells (PSCs), and so far the reported PSC devices with power conversion efficiencies (PCEs) over 21% are mostly based on mesoporous structures containing an indispensable mesoporous TiO 2 layer. However, a high temperature annealing (over 450 °C) treatment is mandatory, which is incompatible with low-cost fabrication and flexible devices. Herein, a facile one-step, low-temperature, nonhydrolytic approach to in situ synthesizing amino-functionalized TiO 2 nanoparticles (abbreviated as NH 2 -TiO 2 NPs) is developed by chemical bonding of amino (-NH 2 ) groups, via Ti N bonds, onto the surface of TiO 2 NPs. NH 2 -TiO 2 NPs are then incorporated as an efficient ETL in n-i-p planar heterojunction (PHJ) PSCs, affording PCE over 21%. Cs 0.05 FA 0.83 MA 0.12 PbI 2.55 Br 0.45 (abbreviated as CsFAMA) PHJ PSC devices based on NH 2 -TiO 2 ETL exhibit the best PCE of 21.33%, which is significantly higher than that of the devices based on the pristine TiO 2 ETL (19.82%) and is close to the record PCE for devices with similar structures and fabrication procedures. Besides, due to the passivation of the surface trap states of perovskite film, the hysteresis of current–voltage response is significantly suppressed, and the ambient stability of devices is improved upon amino functionalization.
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Advanced Energy Materials
·
2024
·
IF 24.4
Wenliang Feng,Chenchen Meng,Xiaolong Guo,Bin Wu,Xulei Sui,Zhenbo Wang
Na-ion hybrid capacitors (NICs) are known for their potential to integrate high power and energy density along with superior lifespan into a single energy storage device. However, the practical implementation of NICs is delayed due to their inadequate energy densities (<100 Wh kg −1 ), which is a result of the lack of anodes with rapid Na-ion diffusion kinetics to match the cathodes. To accelerate Na-ion diffusion kinetics, cobalt-doped TiO 2 (Co x Ti 1−x O y ) nanosheet anodes with reconstructed low-energy barrier channels for Na-ion transfer are designed. Crystal defects, including nanointerfaces, Ti interstitials, and oxygen vacancies, are intentionally introduced to the Co x Ti 1−x O y structure to improve its conductivity and induce pseudocapacitive-type Na-ion storage. Moreover, these crystal defects subtly alter the Na-ion transfer pathways in the bulk Co x Ti 1−x O y and reduce the energy barrier, as confirmed by density functional theory (DFT) simulations. Rapid Na-ion diffusion kinetics can minimize the kinetics discrepancy between anodes and cathodes, presenting great potential for achieving high-performance anodes for NIC applications. When integrated with activated carbon/reduced graphene oxide composite (AC/rGO) cathodes, the fabricated NICs demonstrate remarkable energy density (164 Wh kg −1 at 31 W kg −1 ), power density (8307 W kg −1 at 56 Wh kg −1 ), and an ultralong lifespan (83% capacity retention after 15000 cycles).
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WATER RESEARCH
·
2024
·
IF 11.4
Yuyang Yao,Yueyue Lu,Jingwen Xu,Jiacheng Yu,Liang Guo,Heda Ding,Jian Li,Junbin Liao,Edison Huixiang Ang,Zhenlu Shen,Jiangnan Shen
Membrane-contamination during electrodialysis (ED) process is still a non-negligible challenge, while irreversible consumption and unsustainability have become the main bottlenecks limiting the improvement of anion exchange membranes (AEMs) anti-contamination activity. Here, we introduce a novel approach to design AEMs by chemically assembling 4-pyndinepropanol with bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) in an electrochromic-inspired process. Subsequently, the co-mingled TiO 2 @Ag nanosheet with the casting-solution were sprayed onto the surface of the substrate membrane to create a micrometer-thick interfacial layer. The addition of Ag nanoparticles (NPs) enhances the active sites of TiO 2 , resulting in stronger local surface plasmon resonance (LSPR) effects and reducing its energy band gap limitation (From 3.11 to 2.63 eV). Post-electrodialysis electrochromic AEMs incorporating TiO 2 @Ag exhibit synergistic enhancement of sunlight absorption, effectively suppressing photogenerated carrier binding and promoting migration. These resultant-membranes demonstrate significantly improved bacterial inhibition properties (42.0-fold increase for E. coli ) and degradation activity (7.59-fold increase for rhodamine B) compared to pure TiO 2 membranes. Importantly, they maintain photocatalytic activity without compromising salt-separation performance or stability, as the spraying process utilizes the same substrate materials. This approach to rational design and regulation of anti-contamination AEMs offers new insights into the collaborative synergy of color-changing and photocatalytic materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yunshuo Zhu,Lili Guan,Xiwen Song,Yarong Huang,Ming Li,Qingxian Zhang,Ruihua Guo
Strict control of carbon emissions is crucial for expediting the achievement of carbon neutrality. However, the current CO 2 RR electrocatalytic exhibits numerous shortcomings that impede the enhancement of catalytic activity. Issues such as lengthy catalyst preparation times, and high levels of precious metal content. Additionally, the aggregation of ultrafine nanoparticles contributes to a rapid deterioration in catalytic performance. Herein, a Joule-heating method is efficiently utilized to synthesize heterostructures nano-catalysts for CO 2 electroreduction on carbon cloth substrates. This method takes advantage of the thermoelectric coupling of the carbon cloth to achieve carbothermal reduction, while also regulating phase composition and introduction of oxygen vacancies. The Cu-CeO 2 /TiO 2 /CC catalyst synthesized in this method showed a current density in CO 2 of −32 mA·cm −2 at −1.0 V (vs. RHE). Notably, this catalyst demonstrated high CO selectivity and Faraday efficiency (FE CO ) of up to 82.5 % at a low potential of −0.3 V (vs. RHE). Optimal electrochemical performance is achieved at a power of 40 W. The ultra-fast temperature change process prevented the agglomeration of catalyst particles and facilitated the construction of a stable heterogeneous interface with a high oxygen vacancy concentration. In conclusion, this study presents a promising approach, particularly for the rapid preparation of low-cost, highly selective non-precious metal electrocatalysts.
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LANGMUIR
·
2024
·
IF 3.7
Yuanzhen He,Dengjie Zhong,Yunlan Xu,Ran Jiang,Jiayou Zhang,Pengfei Liao
A La-doped Ti/SnO2-Sb2O4 electrode with TiO2-NTs intermediate layer (Ti/TiO2-NTs/SnO2-Sb2O4-La) was created via the electrodeposition technique. The physicochemical and electrochemical properties of the electrode were analyzed through FESEM, XRD, XPS, CV, and LSV electrochemical tests. The results showed that TiO2-NTs were tightly packed on the surface of Ti substrate, thus improving the binding force of the SnO2-Sb2O4-La coating, offering greater specific surface area, more active spots, higher current response, and longer lifespan for the degradation of rhodamine B. The lifespan of the Ti/TiO2-NTs/SnO2-Sb2O4-La electrode reached 200 min (1000 mA cm–2, 1 M H2SO4), while the actual service life was up to 3699 h. Under the conditions of initial pH 3.0, Na2SO4 concentration of 0.1 M, current density of 30 mA cm–2, and initial rhodamine B concentration of 20 mg L–1, the color and TOC removal rate of rhodamine B reached 100% and 86.13% within 15 and 30 min, respectively. Rhodamine B was decomposed into acids, esters, and other molecular compounds under the action of •OH and SO4•– free radicals and electrocatalysis, and finally completely mineralized into CO2 and H2O. It is anticipated that this work will yield a novel research concept for producing DSA electrodes with superior catalytic efficacy and elevated stability.
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Journal of Environmental Sciences
·
2020
·
IF 4.302
Sijia Qian,Shengyan Pu,Ying Zhang,Peng Wang,Yingchen Bai,Bo Lai
TiO 2 /graphene oxide (GO) as photocatalyst in the photo-degradation of multitudinous pollutants has been extensively studied. But its low photocatalytic efficiency is attributed to the high band gap energy which lead to low light utilization. Cu-TiO 2 /GO was synthesized via the impregnation methods to enhance the catalytic performance. The Cu-TiO 2 /GO reaction rate constant for photo-degradation of pollutants (tetracycline hydrochloride, TC) was about 1.4 times that of TiO 2 /GO. In 90 min, the removal ratio of Cu-TiO 2 /GO for TC was 98%, and the maximum degradation ratio occurred at pH 5. After five cycles, the removal ratio of Cu-TiO 2 /GO still exceeded 98%. UV–visible adsorption spectra of Cu-TiO 2 /GO showed that its band gap was narrower than TiO 2 /GO. Electron paramagnetic resonance (EPR) spectra test illustrated the generation rate of •O 2 − and •OH was higher in Cu-TiO 2 /GO system than TiO 2 /GO and TiO 2 system. The contribution sequence of oxidative species was •O 2 − > holes (h + ) > •OH in both TiO 2 /GO and Cu-TiO 2 /GO system. Interestingly, the contribution of •OH in Cu-TiO 2 /GO was less than that in TiO 2 /GO during the photo-degradation process. This phenomenon was attributed to the better adsorption performance of Cu-TiO 2 /GO which could reduce the accessibility of TC to •OH in liquid. The enhanced non‑hydroxyl radical contribution could be attributed to that the more other active species or sites on (nearby) the surface of Cu-TiO 2 /GO generated after doping Cu. These results provide a new perspective for the tradition metal-doped conventional catalysts to enhance the removal of organic pollutants in the environment.
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