CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jialin Zhuang,Yechen Wang,Liping Lin,Jiaying Xiao,Jiahui Cai,Yingmo Hu,Qi An
Reactive oxygen species (ROS) as highly oxidative substances play significant roles in environmental matter cycling. Despite their high potential in environmental regulation, effective artificial ROS generation techniques are still in the primary stage. In this study, we propose an effective piezo-photocatalytic film for ROS generation in water flow and under light irradiation. The high ROS generation capability stem from the special suprathin and highly porous structure obtained using our developed spray-drying technique to prepare the composite film. During the spray process, optimized component of graphene oxide, TiO 2 nanoparticles, and Poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP) polymer chains self-organized to effective piezoelectrically and photocatalytically active assemblies, and highly porous structures are formed during the drying process. Especial mechanical sensibility to deform is realized in response to external force as weak as 0.2 N. The enhanced piezoelectricity of the PVDF-HFP microdomain, the narrowed band gap, and the electron transfer across the interfacial heterojunction between graphene and TiO 2 all contribute to the especially high piezo-photocatalytic capabilities. Water flow can effectively trigger the piezoelectric field generation in the film, which remarkably boost extractable charge carriers generated upon light irradiation. 88.05 % degradation efficiency of Rhodamine B during 15 min and 95.2 % degradation efficiency of ciprofloxacin in 120 min are realized, along with bacteriostat capabilities. The application potential of the composite are demonstrated in dest-top laundry process and the treated stained water can be used to cultivate plant. We expect the strategy to develop into a novel form of cleaning technique.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Xuyang Hu,Lihui Huang,Ting Sun,Zhenhui Gao,Zhengjun Qu
In this study, the synthesis of titanium dioxide nanotubes/graphene aerogel (TNGA) as a particle electrode and the application in the three-dimensional (3D) electrode for the treatment of low electrolyte concentration wastewater containing tetracycline hydrochloride (TCH) was studied. The effect of reaction parameters (electrode, electrolyte concentration, cell voltage, initial pH, ratio of TNGA mass to solution volume) on the degradation of TCH in an electrochemical system was investigated. At the optimum conditions (cell voltage 18 V, initial pH 6 and TNGA mass to solution volume ratio 2 mg/mL) predicted by the response surface methodology (RSM), a high TCH degradation rate (90.6 %) was obtained after 3 h. TNGA showed relatively high stability in the electrochemical oxidation of organic pollutants (82.3 %) even after fifty continuous cycling experiments. The quenching experiments and electron paramagnetic resonance (EPR) indicated that TNGA can generate singlet oxygen in the 3D electrode system. Two possible degradation pathways for TCH were given based on possible intermediates. This study first showed that TNGA is an excellent electrocatalytic material as a particle electrode in antibiotic elimination.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Xiaoling Xue,Chongyi Wang,Xun Zhu,Dingding Ye,Yang Yang,Hong Wang,Rong Chen,Qiang Liao
The use of a gas diffusion photoanode for a photocatalytic fuel cell is promising to simultaneously degrade VOCs and generate electricity. However, conventional gas-diffusion photoanode faces the issues of inefficient solar energy utilization and serious electron-hole recombination. Herein, a visible-light-responsive gas-diffusion g-C 3 N 4 /TiO 2 heterojunction photoanode is developed for simultaneous degradation of toluene and generation of electricity. In addition to the intrinsic feature of reduced mass transfer resistance of VOCs to the photocatalytic surface, such a gas-diffusion photoanode not only extends the photo-response spectrum, but also enhances charge separation. Accordingly, the photocatalytic fuel cell with the newly-developed photoanode demonstrates superior discharging performance and toluene removal efficiency over the gas-diffusion TiO 2 and g-C 3 N 4 photoanodes. The maximum power density achieved by the gas-diffusion g-C 3 N 4 /TiO 2 heterojunction photoanode is 0.0375 mW/cm², while the maximum toluene removal efficiency reaches 43.8 %. This study has promoted the development of photocatalytic fuel cells for the degradation of VOCs and electricity generation.
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Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 16
·9871-9885
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IF 10.7
Longyan Chen,Pengkun Zhang,Dong-Hau Kuo,Jianmei Jiang,Binghong Wu,Zhengjie Su,Osman Ahmed Zelekew,Jinguo Lin,Dongfang Lu,Xiaoyun Chen
Herein, we demonstrate a Co/S doped TiO2 bimetal sulfur oxide nanoparticle catalyst (labeled CoTiOS) with heterovalent Co states and abundant oxygen vacancy (Ov) defects for the photocatalytic nitrogen reduction reaction (PNRR) in an ambient environment. Co/S co-doping converted TiO2 into a catalyst for visible light photocatalytic nitrogen fixation. The incorporation of Co endows TiO2 with better electrical conductivity and electron trapping ability. The introduction of sulfur adjusts the amount of Ov and Co3+/Co2+ ratio. Ov acts as an active site for trapping H2O and activating H2O to generate a proton for the N2 reduction reaction. Active atoms Co3+ were exposed and activated for N2, and electrons hopping between Co2+ and Co3+ enhanced electron transfer. CoTiOS-3 with appropriate Co/S doping has abundant Ov, suitable heterovalent Co3+/Co2+ ratios, higher surface active sites, smaller crystal sizes, higher specific surface area (SBET), and fast transfer of electrons, and it exhibited a super PNRR activity of 491.56 μmol g−1 h−1, an apparent quantum efficiency (AQE) of 1.89% at 420 nm and a solar-to-ammonia (STA) conversion efficiency of 0.083% in pure water under AM1.5G light irradiation. It also exhibited excellent stability and persistence and shows potential for photocatalytic nitrogen fixation.
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Materials
·
2024
·Vol. 17
·期 18
·4546
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IF 3.1
Li Liu,Zhenghao Cui,Bo Feng,Mengjing Sui,Huaqin Huang,Zhaoyang Wu
In this study, novel Fe2O3/TiO2photocatalytic composites were synthesised by combining traditional oxidation roasting with the sol-gel method, using low-cost metallurgical waste (iron scales) as the raw material. The characterisation results revealed that the oxidised iron scales could be transformed into high-purity and porous Fe2O3particles through oxidation roasting, thereby providing additional sites for the adsorption process and thus serving as an effective carrier for TiO2-based photocatalytic materials. During the sol-gel process, TiO2was loaded onto the synthesised Fe2O3particles, generating core-shell heterostructure Fe2O3/TiO2photocatalytic composites. Under visible light irradiation for 90 min, the Fe2O3/TiO2photocatalytic composites achieved a remarkable methylene blue removal rate (97.71%). This reaction process followed the quasi-first-order kinetic model with a rate constant of 0.038 min−1. The results have demonstrated that this combination of various components in the Fe2O3/TiO2photocatalytic composites improved the adsorption, light utilisation, and charge separation effect of the photocatalysts. Moreover, the material exhibited favourable stability and recyclability, making it a decent candidate for the treatment of wastewater from the biochemical industry. Therefore, this study provides a new strategy for improving the photocatalytic activity of TiO2and expanding the high value-added utilisation of iron scales.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Yijun Luo,Wenxin Yang,Jincheng Liu,Wei Cai,Zewei Liao,Xiaoyan Xiang,Bingjie Li,Yanxiong Fang
The concurrent production of renewable hydrogen and valorization of biomass represents a promising strategy to tackle energy sustainability and environmental concerns. However, designing efficient bifunctional photocatalytic systems capable of driving both reactions remains a significant challenge. This study introduces a Z-scheme heterojunction composed of graphitic carbon nitride (g-C 3 N 4 ) and titanium dioxide (TiO 2 ), synthesized through a combined hydrothermal and self-assembly approach, for simultaneous photocatalytic H 2 evolution and selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF). The heterostructure establishes an internal electric field that directs photogenerated electrons to g-C 3 N 4 and holes to TiO 2 , thereby facilitating effective charge-carrier separation while preserving their strong redox potentials . Structural analyses confirm the uniform growth of TiO 2 nanorods with reduced diameter of less than 10 nm on g-C 3 N 4 nanosheets, which enhances light harvesting and exposes abundant reactive sites. Under optimized conditions, the composite exhibited exceptional performance, achieving H 2 and DFF production rates of 481.9 μmol g −1 h −1 , respectively, with 92.8 % DFF selectivity. This represents a 3.8-fold enhancement in activity compared to pristine g-C 3 N 4 . The improved efficiency is attributed to the Z-scheme charge-transfer pathway, which mitigates recombination losses and optimizes the utilization of electrons and holes for respective reduction and oxidation reactions. This work provides a scalable framework for integrating green hydrogen generation with biomass refining, advancing the development of multifunctional photocatalysts for sustainable energy and chemical synthesis.
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高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Long Chen,Le-Qing Fan,Fei-Fei Deng,Li-Na Wang,Xin-Yuan Song,Xiao-Tong Zhu,Fu-Da Yu,Yun-Fang Huang,Ji-Huai Wu
Recycling of photovoltaic silicon (Si) waste (WSi), which accounts for around 30 % of Si losses in the production of solar wafers, has been prioritized to meet the needs of sustainable energy and the circular economy. If WSi can be employed as the anodes of lithium-ion batteries (LIBs), the recycling of WSi should be effectively achieved. Herein, to form high-performance WSi-derived anodes, a Si/TiO 2 /polydopamine (PDA) composite was prepared by sol-gel method and subsequent in-situ polymerization. The as-prepared Si/TiO 2 /PDA composite consists of a Si core, an amorphous TiO 2 intermediate layer buffering the volume change of Si along with a PDA outer layer alleviating the expansion/contraction of Si together with promoting charge transfer. The Si-O-Ti bonds were formed between the Si core and the TiO 2 intermediate layer. Synergy of TiO 2 and PDA enables superior performance Si/TiO 2 /PDA possessing a reversible discharge capacity of 1757.1 mAh g −1 after 70 cycles at 0.2 A g −1 (65.1 % retention), indicating good cyclability, and super rate performance (1243.9 mAh g −1 at 2 A g −1 ). Lithium-ion full cell with Si/TiO 2 /PDA anode and LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode retains 113.2 mAh g −1 (81.1 % retention) after 100 cycles at 0.5 C.
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ANALYTICA CHIMICA ACTA
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2025
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IF 6
Jingzhi Zhou,Xichen Shi,Chaoqin He,Xiuwen Zheng,Ruo Yuan,Xia Yang
Background Entropy-Driven Circuits (EDC), distinguished by their spontaneous operation and absence of enzymatic reactions, represent a superior strategy for integration with CRISPR/Cas systems, as they obviate the potential for interference among various enzymes during the process of DNA amplification and CRISPR/Cas system integration. Due to the wide band gap of TiO 2 , its response to visible light is limited, and owing to its high crystallinity and exceptionally stable crystal lattice, the charge transfer (CT) process in TiO 2 is suboptimal. Results In this study, lychee-like Fe–TiO 2 was firstly prepared to serve as Raman enhanced substrate, facilitating exciton capture and separation to exhibit an excellent Surface-enhanced Raman spectroscopy (SERS) performance. It is proven that the incorporation of Fe results in a significantly narrower band gap for TiO 2 , facilitating exciton resonance. The amount of Fe in TiO 2 was optimized to fabricate a SERS biosensor for detection of miRNA-21 based on the Cas13a assisted entropy-driven system. The detection limit of miRNA was 43.88 fmol/L. Significance This work proposes a sensing strategy that integrates the CRISPR/Cas system with EDC, leveraging a semiconductor substrate exhibiting superior SERS performance to provide a stable Raman signal, thereby enabling highly sensitive detection of miRNA-21, which has a potential application in disease early warning and treatment.
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PubMed
高影响因子
OPTICAL MATERIALS
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2025
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IF 4.2
Bo Li,Yujia Liu,Lishuai Song,Yuyu Zhang,Nan Liu,Zequan Li
Absrtact This study successfully constructs a g-C 3 N 4 /TiO 2 heterojunction and its Pt nanocluster-modified composite (Pt C –CN–TiO 2 ) through an interface engineering strategy, systematically investigating their photocatalytic RhB degradation performance and mechanisms. Under visible light irradiation, Pt C –CN–TiO 2 achieves a RhB degradation efficiency of 99.29 % within 160 min, with a 34.3 % increase in reaction rate constant compared to the Pt-free catalyst. Mechanistic studies reveal that Pt acts as an electron sink, facilitating the generation of ·O 2 − , while inducing interfacial electronic structure renormalization to enhance surface hydroxyl adsorption and oxygen vacancy activity. Cycling experiments confirm its exceptional stability. This work provides novel interface engineering insights and theoretical foundations for designing highly efficient and stable solar-driven photocatalysts.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zheng Qian,Kunpeng Jia,Ruirui Ma,Yi Xu,Shunhang Dong,Jie Chen,Qiuyang Zhang,Changjiang Pan
Titanium and its alloys, widely used as orthopedic implants, frequently encounter clinical implantation failure due to insufficient antimicrobial and osteogenic activities. To address these problems, a bioactive multifunctional coating (named TNPTL/Sr@TET) was established on titanium surfaces in this study. Bone-like porous TiO 2 nanotubes (TNT) were first constructed via anodic oxidation, followed by bio-functionalization involving the loading of Sr 2+ ions (TNPTL/Sr) mediated by phase-transited lysozyme (PTL) and the covalently grafting of bone-targeted tetracycline (TET) via the carbodiimide reaction. The morphology, chemical constitution, and surface wettability of the prepared coatings were thoroughly characterized via Scanning Electron Microscopy, Energy Dispersive Spectroscopy, X-ray Photoelectron Spectroscopy, Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy, and water contact angle measurement. The results showed that regular TiO 2 nanotube arrays were developed with an average inner diameter of about 52 nm and a wall thickness of about 16 nm. Analysis of characteristic elements and functional groups confirmed that the amyloid-like PTL layer, Sr 2+ ions, and TET were effectively immobilized on the nanotubes in turn. The TNPTL/Sr@TET coating reduced the inner diameter, increased the wall thickness and roughness of nanotubes, and significantly improved the hydrophilicity of titanium surfaces. The TNPTL/Sr@TET coating accelerated in-situ deposition of cauliflower-like apatite, promoted early adhesion and proliferation of osteoblasts, and upregulated alkaline phosphatase, osteocalcin, and runt-related specific transcription factor-2. The TNPTL/Sr@TET coating also demonstrated strong antibacterial activity against S. aureus and E. coli . The TNPTL/Sr@TET coating presented here provides an innovative strategy to enhance both the osteogenic and antibacterial properties of titanium implants.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
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IF 3.5
Yan Jiaqi,Chen Wenkai,Ni Wenjin,Li Lu,Fu Jinfeng,Yang Qian,Yang Zhiyong
N -cyclohexylcyclohexanimine (N-CCA), a by-product of cyclohexylamine (CHA) oxidation to cyclohexanone oxime (CHO), was used as the starting reactant for the efficient conversion to CHO under an oxygen atmosphere, utilizing the constructed surface hydroxyl-rich Ti-based catalysts. Of these, the 20% TiO 2 /Hβ catalyst exhibited unique catalytic activity and stability, achieving 45.9% N-CCA conversion and 82.1% CHO selectivity, with the content of high-boiling by-products not exceeding 1.0%. The superior catalytic performance, as evidenced by characterization results, stems primarily from: (i) the combination of TiO 2 and Hβ, which promotes the formation of a high specific surface area with fine TiO 2 nanoparticles and high-density Ti δ+ active sites, which facilitate the adsorption and activation of N-CCA; (ii) the construction of rich hydroxyl groups, which enhances the Brønsted acid sites, thereby improving the generation of active oxygen species; (iii) the intercrystalline embedding of TiO 2 and Hβ, which forms Ti–O–Si bonds, effectively inhibiting Ti leaching and ensuring excellent catalyst stability. The conversion of N-CCA, the main by-product of CHA oxidation, to the desired CHO using an efficient and robust 20% TiO 2 /Hβ catalyst represents an attractive pathway.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Hui Liu,Long Yan,Feiyue Wang
A unique hybridized antioxidant named TiO 2 -KH550-PA, of which silane modified nano-TiO 2 particles were grafted with 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid by acylation reaction, was applied to intumescent fire-retardant coatings for cable. Through fire protection test, contact angle test , thermogravimetric test and UV-ageing test, the effects of TiO 2 -KH550-PA on hydrophobicity , flame retardancy, smoke suppression, anti-ageing and charring performance for coatings were evaluated. The obtained results indicate that the TiO 2 -KH550-PA can enhance the hydrophobicity of the coating, thereby reducing the adhesion of dust on the coating surface . Additionally, TiO 2 -KH550-PA has a greatly promoting role in strengthening the fire protection abilities of the coating, but an appropriate amount is the key. Compared to coatings without composite, the intumescent fire-resistant coating for cable containing 1 wt% TiO 2 -KH550-PA (IFRCC 2 ) exhibits excellent fire protection performance, including a prolongation by 2.6 times in failure time, an increase by 1.7 times in char layer height, and an increase by 0.4 times in light transmittance for smoke density test. Furthermore, the presence of TiO 2 -KH550-PA can also strengthen the oxidation resistance , charring ability and char layer stability of the coating, when the remaining mass of IFRCC 2 increases to 49.0 % at 800 °C. The anti-ageing performance test demonstrates that the TiO 2 -KH550-PA can absorb ultraviolet light , eliminate free radicals, and raise the structural stability of the coating, thus reinforcing the durability of the fire resistance for the coating.
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高影响因子
危险品化学品经营许可证（带存储）