CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Fangyuan Sun,Haibo Wu,Miao Li,Yiqi Xu,Yuanxin Yan,Yonghao Chen,Yanan He,Shiqi Zu,Xueqing Xu,Hsien-Yi Hsu,Fengyu Su,Yanqing Tian,Yan Jun Liu
Electrochromic (EC) smart windows offer significant potential for building energy efficiency through dynamic solar transmittance regulation. However, current EC technologies face a critical challenge in achieving complete optical blocking. Here, we present a dual-responsive device capable of achieving ultra-low optical transmittance (below 1 % in the range of 400–2500 nm) by integrating a novel EC film with a thermochromic (TC) electrolyte. The EC film, composed of TiO 2 nanoparticles and carefully designed extended viologen derivative with phosphoric moieties (FPB), could enable selective solar blocking through reversible color changes. Furthermore, we synthesized ethylene glycol-containing polymethacrylates as TC copolymers (O x M y ) for cooperative regulation of solar transmittance, which exhibited a wide tunable phase transition temperature range (32–58 °C) to accommodate diverse practical requirements. The resulting device demonstrated four distinct working modes including bleached, colored, opaque, and colored-opaque states. Experiments on house model revealed that the smart window in its colored-opaque state exhibited superior thermal management capabilities, achieving a 5.0 °C reduction in indoor temperature compared to conventional windows. Notably, the device could also function as a battery during operation, generating energy that can be utilized for indoor lighting. In summary, this work provides a promising new approach for developing next-generation smart windows.
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高影响因子
QUIMICA NOVA
·
2025
·
IF 0.7
Meng Shuangyan,Liu Bin,Xie Minglin,Yun Chaoxin,Qiang Jin,He Kaizhou,Yang Zhiwang,Wang Xiangqian
A composite photocatalyst, xTCN (xOTiO2/g-C3N4, where x represents the added quantity of graphite carbon nitride (g-C3N4)), was synthesized using a straightforward one-step hydrothermal method with H2O2 as an oxidant. The H2O2 incorporation into the xTCN composite facilitated the enrichment of oxygen (O) in titanium dioxide (TiO2). This synthesis process effectively reduced the bandgap energy, minimizing the recombination of photogenerated carriers. Concurrently, an O atom was integrated into the g-C3N4 molecule, which altered its bandgap structure and enhanced the photogenerated electron-hole separation efficiency. The dual modification effect was observed when 0.9TCN was used as the catalyst, which converted 77% of benzalcohol with a selectivity exceeding 99%. Additionally, five cycles of reuse only slightly decreased the benzalcohol conversion (by 16%) and selectivity (by 9%), indicating good reusability of the xTCN photocatalyst. The xTCN photocatalyst had an unchanged molecular structure before and after the photocatalytic reaction, demonstrating its superior light stability. The potential photocatalytic reaction mechanism was explored through an active species capture experiment and a Mott-Schottky (M-S) curve test. The results of these studies suggested that •O2- and •OH were the primary reactive species in the photocatalytic reaction.
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ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Yonghui Yang,Hengwei Yan,Zhanwei Liu,Shenghui Guo,Rui Xia,Jin Zhang
This study develops a two-step electrolysis process using TiO2 as the raw material for large-particle titanium powder production in fluoride-chloride molten salts. TiO2 is first dissolved in NaF-K2TiF6 molten salt at 850 °C to form Ti–O–F complexes, and then titanium is electrodeposited at 1.2 A/cm2 for 4 h to produce sponge-like titanium powder. The obtained titanium powder has an average particle size of approximately 30 μm and an oxygen content of about 0.59 wt %. Due to the high oxygen content, secondary electrorefining is performed in NaCl-KCl melts, investigating the effects of TiCl4 addition, current density, and Ti2+ ion concentration. Under conditions of 0.6 A/cm2 current density and 8 wt % Ti2+ ion concentration with TiCl4 addition, the titanium powder reaches an average particle size of 220 μm, with the oxygen content significantly reduced to 0.021 wt %, and its particle size increases significantly. The oxygen content decreases. The current efficiency during the electrolysis of TiO2 is 54%, while the current efficiency during the secondary electrorefining process is 72%. COMSOL Multiphysics simulation shows good agreement with experimental results, highlighting the influence of current density and titanium ion concentration on cathodic deposition thickness. Compared with the traditional Kroll process, this method reduces energy consumption by approximately 30%, offering a more sustainable and energy-efficient alternative for titanium production. This study confirms the feasibility of using TiO2 in fluoride-based molten salt systems for continuous titanium production.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Xin Wang,Xiaoling Ye,Bountheva Louangsouphom,Wenbin Qu,Bingxu Zhang,Huimei Liu
To address the critical limitations of TiO 2 photocatalysts, including insufficient visible-light response and rapid carrier recombination, this study developed a Gd-N co-doped hierarchical porous TiO 2 -macroporous resin (Gd/N/TiO 2 -MAR) composite via a sol-gel hydrothermal method. Multi-scale characterizations (XRD, XPS, BET) revealed that Gd 3 ⁺ doping modulates the band structure and surface properties through 4f-2p orbital hybridization, extending the light response range while suppressing carrier recombination via electron trapping. The hierarchical porous architecture and interfacial synergy significantly enhanced the adsorption-photocatalytic degradation efficiency. Under visible light, the composite exhibited a 1.6-fold higher degradation rate constant for Rhodamine B compared to single N-doped systems, alongside stable performance across a broad pH range (2−12) and under coexisting ion interference. Radical trapping and adsorption-photodegradation kinetic analyses elucidated the cooperative mechanism of interfacial charge transfer and reactive species generation. This work provides new structural design principles for developing efficient multifunctional materials for environmental remediation.
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ELECTROCHEMISTRY COMMUNICATIONS
·
2025
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IF 4.2
Lin Wang,Hai Yu,YaXin Wang,Miao Chun,QianQian Lei,XinPing Yao,XiaoChen Yao,Xin Wei,JianGuo Lv,Yan Xue,JingWen Zhang,SiWen Zhou,DanDan Qu
This study synthesized p-type Cu 2 O using an electrodeposition method and firmly attached it to TiO 2 nanosheets based on fluorine-doped tin oxide (FTO) substrates, forming a dense film that serves directly as a photoanode for photoelectrochemical (PEC) water splitting. Characterization techniques such as XRD, SEM, XPS, and UV–Vis confirmed the successful deposition of Cu 2 O on the TiO 2 nanosheets, forming a p-n heterojunction structure. The incorporation of Cu 2 O effectively broadened the light absorption range of TiO 2 , with a cut-off wavelength red-shifting to 537 nm, enabling it to absorb more visible light. Photoelectrochemical tests showed that under illuminated unbiased conditions, the photocurrent density of Cu 2 O-TiO 2 reached 0.3 mA/cm 2 , which is 7.5 times that of TiO 2 . After applying a small bias (0.5 V), the photocurrent density further increased to 2.1 mA/cm 2 , 5.2 times that under unbiased conditions, indicating that the introduction of electricity effectively accelerated the separation efficiency of photo-generated carriers. The Cu₂O-TiO₂ heterojunction exhibited significantly higher photocurrent density (measured by LSV) and charge transfer efficiency (evaluated by EIS) than pure TiO₂. This research provides new insights for PEC water splitting technology and serves as a reference for designing high-performance photocatalysts.
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APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Junya Wang,Chenxi Ma,Shikun Wen,Ping Ning,Yu Zhang,Yi Liu
This study synthesized a composite material of ZIF-67 and black titanium (BT) with high CO 2 reduction capability via a mechanochemical method. Through in-depth analysis of the morphology, structure, optical properties, and electrochemical behavior of the ZIF-67-BT composite photocatalyst, it was confirmed that the composite successfully formed an S-scheme heterojunction structure. This configuration can effectively separate photogenerated charge carriers, resulting in superior CO 2 reduction performance. The findings indicate that the composite material has optimal catalytic performance when the ZIF-67 doping content reaches 30 wt% (30 %ZIF-BT). Within 5 h, 30 %ZIF-BT exhibited excellent photocatalytic activity, with CO and H 2 yields reaching 2486.4 μmol·g −1 and 3495.0 μmol·g −1 , which were 44.0 and 29.4 times greater than the yields of BT, and 2.4 and 1.4 times than ZIF-67. The syngas (comprising CO and H 2 ) generated by ZIF-BT, with an adjustable CO to H 2 ratio ranging from 1:1.40 to 1:2.47, is regarded as a significantly beneficial and crucial intermediate for further conversion into valuable hydrocarbon fuels via Fischer-Tropsch synthesis. This research offers a feasible method to construct S-scheme heterojunction in ZIF-BT composite materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yonghui Yang,Hengwei Yan,Zhanwei Liu,Shenghui Guo,Wenhui Ma,Mingyi Hu,Rui Xia,Wenrong Wang
This study explores a CaO-regulated thermal–electrochemical synergistic reduction approach for TiO 2 in fluoride-based molten salts, aiming to enhance deoxygenation efficiency and particle densification. At elevated temperatures, CaO reacts with TiO 2 and the NaF–K 2 TiF 6 molten salt to form CaF 2 and reactive intermediate phases, which facilitate the in situ generation of metallic Ca and alter the local redox environment. These transformations promote the complete electrochemical reduction of TiO 2 into metallic titanium through the formation and subsequent reduction of titanium oxyfluoride complexes such as K 2 NaTiOF 5 and TiOF 2 . Cyclic voltammetry reveals that CaO addition induces a negative shift in the Ti(IV)/Ti(III) redox potential, suggesting a modified reduction pathway and increased activation energy. The titanium powders synthesized at 890 °C with current densities ranging from 2.0 to 3.5 A/cm 2 exhibit reduced oxygen content down to 2900 ppm and a dense, near-spherical morphology. Microstructural analyses using FIB–SEM and EDS confirm that CaO incorporation suppresses surface oxidation and promotes particle uniformity. These findings provide mechanistic insight into the synergistic role of CaO in titanium deoxygenation and demonstrate its potential in reducing the oxygen content of titanium powders and improving their compositional uniformity.
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Biosensors-Basel
·
2025
·Vol. 15
·期 8
·536
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IF 5.6
Yulin Li,Junbo Li,Haisu Wang,Shaorui Qi,Zhehao Zhang,Yaqiu Wang,Ying Wang,Wei Ji
Acanthopanax senticosusis an essential medicinal herb in traditional Chinese medicine, with its pharmacological properties largely attributed to bioactive flavonoids. The types and amounts of these flavonoids act as vital quality markers for both the raw materials and the resultant products. In this work, we introduce a TiO2@AgNP nanocomposite designed as a surface-enhanced Raman scattering (SERS) sensor aimed at the preliminary quantification and identification of flavonoids. This is achieved by leveraging the effective molecular adsorption properties of TiO2alongside the ‘hot spots’ generated by AgNPs. By optimizing SERS performance through adjustment of the molar ratio between TiO2and Ag, we can quantitatively evaluate four flavonoids—luteolin, kaempferol, quercetin, and rutin—with low detection concentrations of 10−6M, 10−5M, 5 × 10−6M, and 10−6M, respectively. Additionally, we observe a nearly linear relationship between the SERS signals and the flavonoid concentrations, allowing for dual or multiplex analysis of these compounds. Furthermore, we successfully differentiatedAcanthopanax senticosussamples from six different geographical regions in China based on the detection of significant flavonoid constituents. This serves as a proof of concept for practical applications that can enhance the identification and distinction of traditional Chinese medicine, as well as assess quality and medicinal efficacy.
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PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2025
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IF 2.5
Khoa Vu Dang,Bac Luong Huu
A novel NiTiO 3 /TiO 2 heterostructure was synthesized via a green sol–gel method using lemon juice as a natural precursor. The phase formation, structural, morphological, and optical properties of the synthesized composite were investigated using x-ray diffraction (XRD), Raman scattering, field-emission scanning electron microscopy (FESEM), and diffuse reflectance spectroscopy. XRD and Raman scattering results confirm the coexistence of both ilmenite NiTiO 3 and TiO 2 phases in the composite. The TiO 2 phase in the composite undergoes temperature-dependent phase transformation: it exists as anatase when calcined at 600°C, a mixture of anatase and rutile at 700°C, and pure rutile at 800°C. FESEM reveals that the synthesized NiTiO 3 particles exhibit spherical nanostructures. The NiTiO 3 /TiO 2 composites were investigated for their sonocatalytic activity in the degradation of rhodamine B under ultrasonic irradiation. The composite exhibited significantly enhanced sonocatalytic performance compared to pure NiTiO 3 , which can be attributed to the improved interfacial charge transfer and the synergistic effects between NiTiO 3 and TiO 2 . These results highlight the potential of green-processed composites in advanced oxidation processes for wastewater treatment. Graphic abstract
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Catalysts
·
2025
·Vol. 15
·期 8
·769
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IF 4
Chen Xie,Tianyi Zhao,Feng Zhou,Bohao Zhao
Photocatalysis offers a cost-effective and eco-friendly approach for environmental remediation, yet traditional powdered photocatalysts suffer from poor recyclability and separation challenges. To address these limitations, we developed a recyclable carbon fiber-supported composite photocatalyst (CC/TiO2NRs@MoS2NPs) featuring a three-dimensional hierarchical core–shell architecture. This structure comprises a TiO2seed layer, vertically aligned TiO2nanorod arrays as the core, and a MoS2nanoparticle shell, fabricated via sequential deposition. Under simulated solar irradiation, the TiO2@MoS2heterojunction exhibited significantly enhanced uranium adsorption capacity, achieving a remarkable 97.3% photocatalytic removal efficiency within 2 h. At an initial uranium concentration of 200 ppm, the material demonstrated an exceptional extraction capacity of 976.7 mg g−1, outperforming most reported photocatalysts. These findings highlight the potential of this 3D core–shell design for efficient uranium recovery and environmental purification applications.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Zhong Tian,He Guoxu,Wan Menghui,Xu Chenglong,Wang Zhiqiang,Wang Zhihua,Zhao Yanbao,Sun Lei
Inspired by the multi-scale wrinkled patterns observed on tree bark surfaces, a novel approach was developed to enhance oil–water selectivity in emulsion separation by constructing nanoscale rough structures on membrane surfaces, endowing them with superhydrophobic and superoleophilic properties. Specifically, PVDF electrospun nanofibrous membranes were coated with a composite layer composed of polydimethylsiloxane (PDMS) and TiO 2 nanoparticles through a simple one-step dip-coating method, resulting in the formation of PVDF@PDMS/TiO 2 membranes featuring heterogeneous interfaces. Through heat treatment at 120 °C, a durable three-dimensional textured surface was fabricated, exhibiting a water contact angle of 170.2°, which confirms its remarkable superhydrophobic properties. The membrane demonstrated outstanding performance in oil–water separation, achieving a separation efficiency greater than 99%, a high flux of 1100 L m⁻ 2 h⁻ 1 , and effective removal of organic dyes through the photocatalytic activity of TiO 2 . Antibacterial testing demonstrated over 99% inhibition effectiveness against both Staphylococcus aureus and Escherichia coli . Moreover, the membrane retained a contact angle above 160° when exposure to strong acidic or alkaline conditions, indicating excellent chemical stability. These characteristics suggest that the developed multifunctional nanofibrous membrane with a hierarchical wrinkled structure exhibits significant potential for the efficient treatment of complex industrial oily wastewater systems. Graphical abstract
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CHINESE JOURNAL OF PHYSICS
·
2025
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IF 4.6
Hanzhaobing Wu,Jin Xu,Hongping Zhao,Baolong Shi,Yu Wan,Hao Sun,Dalei Wang,Changwei Bi,Chao Wang,Wei Liu
Thiabendazole (TBZ) and thiram are widely used fungicides in agricultural production for effective disease control. However, their persistent environmental accumulation and migration lead to excessive residues in soil, groundwater, and other matrices, causing severe contamination and significant human health risks. In this study, TiO₂/PPy (polypyrrole) composites were synthesized via an eco-friendly chemical method to develop a photoelectrochemical (PEC) sensing platform for TBZ and thiram detection. The conductive PPy incorporation significantly enhanced TiO₂'s charge separation efficiency, yielding a notable photocurrent response (∼6 μA/cm²). The fabricated PEC sensor demonstrated reliable detection performance for both fungicides.
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高影响因子
危险品化学品经营许可证（带存储）