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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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2014
·Vol. 14
·期 9
·6934-6940
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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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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Jiepeng Zhao,Zijian Li,Yu Zuo,Sai Huang,Zhaomin Tong,Yifei Ma,Liantuan Xiao,Suotang Jia,Xuyuan Chen,Mei Wang
NH 2 -MIL-125(Ti) (NM) is a prototypical metal–organic framework (MOF) photocatalyst with visible-light responsiveness. However, its practical application in CO 2 reduction is significantly limited by fast charge carrier recombination and poor product selectivity. Constructing heterojunctions with appropriately matched semiconductors offers an effective strategy to overcome these limitations, where coupling material selection and precise interfacial engineering are key. ZnO, a stable n-type wide-bandgap semiconductor, not only possesses excellent electron mobility but also exhibits suitable conduction band alignment with NM, enabling favorable interfacial charge transfer. Moreover, ZnO can form an interfacial Ti–O–Zn bonding bridge with NM, facilitating directional electron transport and suppressing charge recombination. In this work, we employed atomic layer deposition (ALD) to construct uniform ZnO shells on NM with sub-nanometer precision, thereby finely tuning the ZnO loading and interface structure. A series of ZnO@NH 2 -MIL-125 (ZnO@NM) composites are obtained by controlling the ZnO loading, with the optimal sample showing the highest activity, yielding 13.30 μmol h −1 g −1 of CO and 5.47 μmol h −1 g −1 of CH 4 . Notably, CH 4 selectivity is significantly improved from 16 % to 29 %, and further increases to 31 % under gas-solid conditions. In situ Fourier Transform Infrared (FTIR) spectroscopy and Density Functional Theory (DFT) calculations reveal that ZnO not only promotes directional interfacial electron transfer but also facilitates the hydrogenation of *CO to *CHO, thus enhancing CH 4 selectivity. This study demonstrates an ALD-enabled interface engineering strategy to construct MOF-semiconductor heterojunctions, offering mechanistic insights and design principles for advancing efficient and selective photocatalytic systems for carbon dioxide reduction.
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BMC Oral Health
·
2025
·Vol. 25
·期 1
·1-16
·
IF 3.1
Li Congcong,Zhao Li,Chen Xiaotao,Aierken Aikepaer,Yu Min,Kong Chuifan,Baheti Wufanbieke
Background Pure titanium and titanium alloy implants have been widely utilized in dental implantology due to their excellent biocompatibility and favorable elastic modulus. However, the inherent bioinertness of titanium-based implant surfaces often results in suboptimal osseointegration with surrounding bone tissue. Consequently, surface modification is essential to enhance the osseointegrative capacity of titanium implants. Methods We fabricated hydroxyapatite-graphene oxide (HA-GO) coatings via electrochemical deposition and systematically compared four distinct protein loading methods. Ultimately, we developed a hydroxyapatite-graphene oxide/interleukin-4 (Ti@HA-GO@IL-4) coating on pure titanium substrates to investigate its physicochemical properties and biocompatibility. Results The composite coating was successfully fabricated on pure titanium substrates, inducing significant surface modifications including the incorporation of bioactive functional groups, enhanced hydrophilicity, and altered surface morphology. Comparative characterization revealed that the composite coating exhibited superior hydrophilic properties, improved mechanical compatibility with bone tissue, stable Interleukin-4 (IL-4) adsorption and sustained-release behavior, as well as excellent biosafety confirmed by proliferation and adhesion assays using mouse embryo osteoblast precursor (MC3T3-E1) cells, when compared to unmodified titanium controls. Conclusions Ti@HA-GO@IL-4 represents a composite coating material with exceptional physicochemical properties and biological performance. This material demonstrates efficient IL-4 loading capacity and sustained release characteristics, thereby effectively promoting osteogenesis. These findings provide valuable insights for developing bioactive functional materials to enhance implant osseointegration.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 23
·11341-11349
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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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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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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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MOLECULES
·
2025
·Vol. 30
·期 7
·1568
·
IF 4.6
Huohai Yang,Yeqi Gong,Xin Chen,Renze Li,Yuhang Chen,Mingjun Li,Xinrui Tang
The ecological impact linked to hydraulic fracturing, namely with the usage of water and the energy-intensive disposal of flowback fluids, has led to a thorough evaluation of alternative treatment approaches that are more environmentally friendly. The objective of this work was to create coralline-like anatase TiO2/α-Ni(OH)2particles using a hydrothermal approach. The purpose was to improve the efficiency of photocatalysis by increasing the number of oxygen vacancies. An ozone-assisted photocatalytic reaction was used to increase the composite photocatalyst’s degrading efficiency for fracturing flowback fluid. The fracturing flowback fluid’s chemical oxygen demand (COD) degradation efficiency was greatly increased following the introduction of the synergistic treatment system consisting of sedimentation, membrane separation, and ozone photocatalysis. This improvement led to a reduction of 98.42% during a processing time of 90 min, using a Ti/Ni mass ratio of 1:1. This collaborative method partially replaced traditional methods of evaporation concentration and electrochemical degradation, resulting in a 24.18% enhancement compared to individual material catalyst systems. These findings provide crucial insights for improving and optimizing external treatment techniques in shale gas fracturing operations.
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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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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 THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Qiqiang Zhang,Lei Cao,Bo Peng,Hui Zhang,Xingyuan San,Yanchun Zhou,Man Jiang,Qingguo Feng,Chunfeng Hu
MAX phase ceramics, as a family of ternary layered ceramics, have received a lot of attention in the past decade due to their potential as precursors for two-dimensional transition metal carbides. However, due to complex multi-component metallurgical reactions, multicomponent MAX phase ceramics have always faced difficulties in purification and homogenization. This paper identifies a new strategy for synthesizing multicomponent MAX phase ceramics that can eliminate these synthesis difficulties. This path utilizes low-temperature (below 1000°C) stable Ti 2 AlC and carbide powder as initial materials to simplify complex multi-component reactions into a one-step reaction, successfully achieving high purity and precise doping ratio. As an example, four novel doped MAX phase ceramics, Ti 2 MAlC 2 (M = Nb, Ta, W) and Ti 2 HEAlC 2 (HE = 1/7Ti, 1/7V, 1/7Zr, 1/7Nb, 1/7Hf, 1/7Ta, 1/7 W) were successfully synthesized using this method. This dynamic-based design, on one hand, simplifies the reaction mechanism to make purification easier, and on the other hand, the concentrated release of entropy during the reaction process promotes phase transition and related element homogenization.
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CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Anlin Xu,Weiqing Han,Jiansheng Li,Xiuyun Sun,Jinyou Shen,Lianjun Wang
A novel dual tubular membrane electrodes reactor was fabricated to degrade a refractory heterocyclic compound-tricyclazole using a tubular membrane Ti/IrO 2 –Ta 2 O 5 as anode and a carbon black-polytetrafluoroethylene (CB-PTFE) modified graphite membrane as cathode. Field emission scanning electron microscopy (FE-SEM), cyclic voltammetry (CV), Linear Sweep Voltammetry (LSV) and accelerated lifetime tests revealed that a porous tubular membrane Ti/IrO 2 –Ta 2 O 5 performed better electrocatalytic activity and high stability under acidic conditions. Meanwhile, the effects of aeration on electrogeneration of hydrogen peroxide (H 2 O 2 ) were assessed and the role of anode in dynamic system was elucidated by comparing with the static system. The influence of the operative parameters such as current density (2.5–12.5 A/m 2 ), membrane flux (52–178 L/m 2 ·h) and pH (3–11) were optimized and monitored. It is demonstrated that tubular membrane Ti/IrO 2 –Ta 2 O 5 anode provided enough oxygen to electrogenerate H 2 O 2 , up to 1586 mg/m 2 ·h, at 10 A/m 2 without aeration in acidic solution. Even if no circulation of the influent, the best removal rate of contaminants reached a stable value 79% at 20 min, which was 6.58-fold greater than the sum of the individual electrochemical oxidation. Synergism was observed during the dual tubular membrane E-Fenton system.
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