ACS Applied Energy Materials
·
2021
·
IF 6.024
Yan Li,Guangyu Chen,Jie Lin,Liuqing Huang,Chentong Zhang,Xuetao Luo
TC4 (Ti–6Al–4V) nanoparticles (TC4NPs) and silicon nanoparticles (SiNPs) with a median size of 146 and 51 nm were prepared by sand milling from scrap produced by refining silicon and TC4. The SiNPs and TC4NPs are mixed, carbonized, and leached in different proportions to obtain Si@C/TiO2@C/Hollow-C anode materials. The special structure of the anode materials provided more space for the volume expansion of silicon. The anatase TiO2 in TC4NPs relieves the volume expansion and reduces the transfer impedance, and the lithiated TiO2 can promote the electrical conductivity of the Si@C/TiO2@C/Hollow-C anode during the charge/discharge process. Furthermore, the Si@C/TiO2@C/Hollow-C (SiNPs/TC4NPs = 2:1) electrode delivers excellent rate performance; after cycling at a series of higher current densities, 92% of the original level of the reversible capacity can be maintained. The Si@C/TiO2@C/Hollow-C (SiNPs/TC4NPs = 2:1) anode retains 558 mA h·g–1 after 400 cycles with a large current density of 1000 mA·g–1. The synthesis method of the Si@C/TiO2@C/Hollow-C anode is a low-cost, facile, and nontoxic process, endowing it with the potential for application as energy materials for mass production.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 23
·11341-11349
·
IF 3.925
Chentao Hou,Xiaoping Yuan,Miaomiao Niu,Yijie Li,Liping Wang,Mingyuan Zhang
The in situ synthesis method was used to grow Co-based one-dimensional MOF Co-PYDC (CP) on a pre-synthesized TiO2/TiOF2 (TOF) material which was used to treat tetracycline antibiotic wastewater. Through the degradation of tetracycline hydrochloride (TCH) under simulated sunlight, the photocatalytic activity of the synthesized samples was investigated. The results showed that the 5% CP/TOF photocatalyst exhibited the best photocatalytic performance on tetracycline hydrochloride degradation. The adsorption efficiency of TCH was 48% in the dark reaction for 0.5 h, and the removal efficiency reached 85% under 1.5 h simulated sunlight, which was much higher than those of TOF and CP monomers. Among them, the prepared 5% CP/TOF nanocomposite had a lower bandgap energy (2.63 eV), a larger specific surface area (52.01 m−2 g−1) and a lower electron–hole recombination rate. The synthesized CP/TOF photocatalyst showed promising application potential in antibiotic wastewater treatment. Moreover, the detected superoxide radical was the main active species, which further explained the degradation pathway and catalytic mechanism of the CP/TOF photocatalytic degradation of TCH, following the z-type heterojunction model. In this study, a CP/TOF composite material for photocatalytic degradation of tetracycline wastewater was designed and developed, which provided experimental methods and ideas for the practical treatment of wastewater.
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PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2020
·Vol. 16
·期 6
·996-1002
·
IF 2.831
Zhang Rui,Li Gang,Zhang Yue
In this study, we decorated CdS on the surface of MIL-125(Ti) using a photochemical method to prepare the CdS-MIL-125(Ti) nanocomposites. The obtained samples were characterized by a series of techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) spectra, electrochemical measurements and UV-Vis diffuse reflectance spectra (DRS). The results show that the CdS nanoparticles were highly dispersed on surface of MIL-125(Ti). The combination will promote the separation of electron–hole pairs and increase the dispersity of CdS. The nanocomposites were subsequently used as photocatalysts in the selective oxidation of benzyl alcohol to benzaldehyde using the molecular oxygen as the oxidant. The nanocomposites show excellent performance in the photocatalytic reaction under visible light irradiation. The conversion of benzyl alcohol to benzaldehyde was about 20.1% with no by-products observed.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yi Wen,Chenguang Qian,Bowen Cui,Boxuan Tian,Chunquan Li,Hang Li,Fang Yuan,Zhiming Sun
Photocatalytic CO 2 reduction harnesses sunlight to convert CO 2 into fuels (e.g., CO, CH 4 ) to address global warming and energy shortages, but faces challenges like high cost and low efficiency. In this work, NH 2 -MIL-125(Ti)/diatomite composites were prepared by one-step solvothermal method using diatomite as a support. Characterization indicated that NH 2 -MIL-125(Ti) units were grown in-situ on diatomite through surface-mediated interactions with Si-O-Ti bonds. This process significantly reduced the agglomeration of NH 2 -MIL-125 particles. Among the resulting composites, NH 2 -MIL-125/DE-60 % had the best photocatalytic activity with a CO production rate of 7.36 μmol g −1 h −1 , which is 1.56 times higher than NH 2 -MIL-125. In four cycles, the yield remained above 6.88 μmol g −1 h −1 . Meanwhile, electrochemical characterization revealed that composite enhances the separation efficiency of photogenerated carriers and reduces carrier migration resistance. The excellent performance of NH 2 -MIL-125/diatomite composites could be attributed to the synergistic effects of its better dispersion and the Si-O-Ti interface formation, which improve light absorption, increase the number of active sites and facilitate charge separation. Meanwhile, the specific mechanism of CO 2 reduction by NH 2 -MIL-125/diatomite composites and its reduction pathway were also revealed. In conclusion, this study successfully reduced the agglomeration effect of MOFs, and provided implications for realizing in-situ growth of MOFs on mineral surfaces.
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PubMed
高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Kaiwen Yin,Zheng Liu,Chenyu Liao,Jiawei Li,Hao Wang,Kunhua Yang,Li Zhang,Yunfeng Li
The potential for persistent and controllable delivery of osteoprotegerin (OPG) under osteoporotic conditions has become an essential property of bone implants to promote osseointegration and osteogenesis. Herein, a microenvironment-responsive surface coating for titanium (Ti) implants by immobilizing metal-organic frameworks (MOFs) loaded with OPG onto alkali heat-treated Ti surfaces via gelatin (Gel) (AHT-MOF@OPG-GEL) was successfully fabricated. In weakly acidic environment, MOF@OPG can achieve responsive degradation and slow release of zinc ions (Zn2+) and OPG, which not only inhibits osteoclast activity and osteoclastic biomarker expressions, but also potentiates osteoblast proliferation and differentiation in vitro. Moreover, alkali heat treatment was favorable for the hydrophilicity and cell adhesion of the Ti surface. In addition, in vivo experiments in the osteoporotic bone defect model confirmed that the MOF-based functional coating could promote the generation of new bone around the implant, thereby enhancing the bonding strength between the implant and the surrounding bone tissue, and effectively facilitating the osseointegration of the implant with the bone tissue. In conclusion, this study is expected to provide new ideas for improving the osseointegration of implants in osteoporotic conditions.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yuyuan Zhang,Huawen Hu,Wanwen Kang,Guojian Qiu,Ruiyin Liang,Lifang Deng,Haoran Yuan
This study is devoted to the scalable fabrication of a high-performance composite photocatalyst by incorporation of the visible-light-active CdS flowers (with sharp edges exposed) onto a TiO 2 nanotube array (TNA) film on the Ti foil substrate. To evaluate the visible-light-harvesting performance of the prepared hierarchical architecture consisting of the CdS flowers, TNAs, and Ti foil, we subsequently assembled a photoelectrochemical (PEC) cell with membrane electrode assemblies fabricated innovatively by thermocompression. The CdS flowers can efficiently harvest the visible light energy , while TiO 2 collects photoelectrons, effectively separating of the photoexcited electron-hole pairs and hence enhancing the photocatalysis efficiency in the photoelectrochemical conversion and yield of hydrogen production from water splitting. An impressive hydrogen production rate of 22.44 μmol▪h −1 ▪cm −2 was obtained in the PEC cell with the CdS flowers-sensitized TNA film under simulated solar light with an active irradiation area of around 42 cm 2 , thus showing great potential for practical applications.
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RSC Advances
·
2018
·Vol. 8
·期 22
·12459-12470
·
IF 2.936
Minghua Wang,Longyu Yang,Jinyun Yuan,Linghao He,Yingpan Song,Hongzhong Zhang,Zhihong Zhang,Shaoming Fang
A series of bismuth sulfide (Bi2S3) nanorods and amine-functionalized Ti-based metal–organic framework heterojunctions [denoted by Bi2S3@NH2-MIL-125(Ti)] were constructed and explored as bifunctional photocatalysts for Cr(VI) reduction and rhodamine B (RhB) degradation under visible light illumination. Compared with the individual NH2-MIL-125(Ti) and Bi2S3, the as-synthesized Bi2S3@NH2-MIL-125(Ti) photocatalyst exhibited an enhanced photocatalytic activity toward Cr(VI) and RhB owning to the synergetic effect between Bi2S3 and NH2-MIL-125(Ti). Moreover, the Bi2S3@NH2-MIL-125(Ti) heterojunctions showed increased Cr(VI) removal efficiency by adding RhB in the system. The photocatalytic mechanism was proposed based on the analysis of different scavenger for active species and electron spin resonance spectrometry. The introduction of Bi2S3 into NH2-MIL-125(Ti) can extend the light adsorption and improve the transfer and separation of photogenerated charge carriers through the Bi2S3@NH2-MIL-125(Ti) heterojunction with unique band gap structure. The synthesized Bi2S3@NH2-MIL-125(Ti) photocatalyst also exhibited good reusability and stability.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 9
·6934-6940
·
IF 1.339
Shi Huajun,Xiao Xin,Zeng Lixuan,Zhang Qiuyun,Nan Junmin,Wang Lishi
Three-dimensional (3D) titanates hierarchical macro/nano-architectures constructed by one-dimensional (1D) nanobelts are successfully synthesized by a hydrothermal-calcining process using metal Ti particles as a precursor. Their morphology and structure are characterized, and their
photocatalytic reactivity to tetracycline hydrochloride (TC) is evaluated under visible-light irradiation. The results show that the 1D nanobelts are formed through hydrothermal reaction, and then those 1D nanobelts encircle the metal Ti particles precursor to form 3D macro/nano-architectures.
The products with different phase composition, from hydrated titanium oxides to sodium titanates, are obtained by increasing the post-calcining temperatures from 200 °C to 800 °C. The photocatalytic degradation of TC is observed for all samples under visible-light irradiation, and
the sample calcined at 600 °C achieves the best photocatalytic reactivity. The visible-light performance of as-synthesized catalysts is considered as a charge-transfer mechanism initiated by the photoexcitation of the surface-complex between TC molecules and titanates, and then followed
by the photosensitization mechanism. Two intermediates are identified in the photodegradation process using liquid chromatography combined with mass spectrometry. In addition, the as-synthesized titanates are stable and can be used repeatedly, showing their promising prospect in the practical
applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiepeng Zhao,Yifei Ma,Zijian Li,Zhaomin Tong,Mei Wang,Liantuan Xiao,Suotang Jia,Xuyuan Chen
This study presents the design of a composite photocatalyst that harnesses the combined effects of internal and external heterojunctions for enhanced performance. The internal heterojunction is achieved by annealing NH 2 -MIL-125(Ti) (NM) under an argon atmosphere, forming an N-doped C-coated anatase/rutile heterostructure (A-NM). By controlling the annealing temperature, the A-NM prepared at 650 °C (A 650 -NM) demonstrates superior photocatalytic CO 2 reduction capability, with an outstanding CO production rate of 0.25 μmol h −1 g −1 under a light intensity of 0.1 W cm −2 . An external heterojunction is then created by combining NM and A 650 -NM in an optimized ratio. At an optimal composite ratio of 9:1 (NM: A 650 -NM), the CO production rate reached 6.3 μmol h −1 g −1 , which is 3.5 times higher than NM and 25 times higher than A 650 -NM. Characterization and DFT analyses reveal that the improved performance stems from the internal heterojunction within A 650 -NM's TiO 2 crystal phases and the external heterojunction between NM and A 650 -NM, which enhanced charge separation and carrier mobility. The N-doped carbon layer further boosts charge carrier transfer efficiency. This work introduces a novel Metal–Organic Framework (MOF)-based photocatalyst for CO 2 reduction, offering valuable theoretical insights and practical strategies for optimizing its performance.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Li Kang,Yining Xing,Haibo Yu,Jing Lu
Microplastics, as pervasive pollutants, pose severe threats to ecosystems and human health, necessitating efficient and sustainable degradation strategies. Nanozymes, mimicking natural enzymes, provide an innovative strategy for eliminating water contaminants, with light activation significantly boosting their catalytic efficiency through a simple, remotely adjustable process. However, the cooperative mechanism of the nanozyme-photocatalytic system is still poorly elucidated, highlighting the need for comprehensive investigations into its microplastic degradation efficacy and underlying mechanisms. Herein, we developed nitrogen-doped titanate nanotubes (NTNTs) with Ti-N coordination, achieving exceptional photo-enzyme synergistic catalysis for highly efficient microplastic decomposition. Nitrogen doping into TNTs broadens their light absorption spectrum, improves charge separation efficiency, and enhances photocatalytic activity. The Ti-N interaction induces electronic structure modifications that impart peroxidase-like (POD-like) property to NTNTs. First-principles calculations reveal that NTNTs exhibit enhanced POD-like activity by enabling exothermic adsorption of -O/-OH intermediates (up to −6.6 eV for −2OH) and reducing the energy barrier for hydroxyl (•OH) radical generation compared to endothermic TNTs, thereby accelerating H 2 O 2 activation kinetics. Furthermore, H 2 O 2 activation promotes Ti(III)/Ti(IV) cycling, significantly boosting •OH generation while creating an autocatalytic system that sustains reactive oxygen species production, thereby reinforcing the photo-enzyme synergistic mechanism. NTNTs-2 demonstrates superior photo-enzyme synergistic degradation of PE (15.19 % mass loss in 8 h), outperforming individual photocatalytic (2.49 %) and enzymatic (0.04 %) processes, with broader pH adaptability (4.7–12.3) and universal effectiveness across PP/PS/PVC microplastics, while SEM confirms progressive surface fragmentation enhancing catalytic accessibility. This study achieves a breakthrough in multifunctional catalyst design by synergizing photocatalytic and nanozyme mechanisms for environmental remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huali Zhu,Jialong Ying,Yiying Wang,Ziyi Huang,Sunjing Yan,Yi Zhong,Qiulin He,Penghui Cao,Chuanchang Li,Zhaoyong Chen
Ultra-high‑nickel layered oxide cathode materials are considered key candidates for next generation high-energy-density lithium-ion batteries due to their remarkable specific discharge capacity. However, its extremely high nickel content results in severe structural degradation and interfacial side reactions during cycling, thus restricting its practical application. This work proposes a novel bulk-surface Al/Ti continuous modification strategy. Through this strategy, Al and Ti are co-doped into the bulk phase of NCM955, while a fast-ion-conducting solid electrolyte, Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP), is coated on the surface. The modified NCM955 delivers a high reversible capacity of 223.09 mAh/g at 0.1C (2.7–4.3 V) with excellent initial coulombic efficiency. After 100 cycles at 1C, the capacity retention and remaining capacity reach 90.18% and 183.44 mAh/g, and the capacity retention after 100 cycles in a full cell is 93.29%. Even after 100 cycles at a high rate of 10C, it retains 97.3% of its capacity. Bulk Al/Ti doping strengthens the transition metal‑oxygen bond energy, effectively suppressing lattice oxygen loss and inhibiting Ni 2+ migration. As a result, it reduces cation mixing and prevents structural deterioration during cycling. Simultaneously, the surface LATP coating enhances interfacial Li + diffusion kinetics, serves as a physical barrier against side reactions with air and electrolyte, and helps compensate for active lithium loss during cycling. This work demonstrates that the bulk-surface Al/Ti continuous modification strategy, achieved through synergistic Al/Ti co-doping and LATP coating, offers an effective approach to enhance the structural stability and electrochemical performance of ultra-high‑nickel cathode materials.
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Materials
·
2026
·Vol. 19
·期 18
·3885
·
IF 3.7
Zhe Wang,Xi Chen,Meng Jiang,Zhijian Lu,Yuan Chen,Xuan Su,Qingfeng Yang,Dequan Yang,Peng He,Yanbin Chen
This work examines the response of Ti-6Al-4V fabricated by wire-laser directed energy deposition (DED) to heat inputs between 175 and 350 J/mm. Microstructure, tensile behavior, and rotating-bending fatigue were evaluated. As input increased, the transverse size of columnar prior β grains rose from about 642 to 1079 μm and the mean α-lath width increased from 0.65 to 1.32 μm. The α structure consequently changed from a fine acicular/basketweave form to a coarser lamellar form with clearer colonies. Tensile and yield strengths stayed near 900 and 840 MPa, whereas elongation fell from 14.3% to 10.3%. After a 600 °C, 4 h stress relief, fully reversed fatigue tests were performed at 500 MPa (R = −1). Specimens with 175 J/mm heat input reached about 3 × 107cycles, while one with 350 J/mm fractured at roughly 1 × 105cycles. The longer life of H175 coincided with its finer interwoven α structure, closer striations, more secondary cracks, and a more tortuous crack route.
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