CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ju Cheng,Lei Zhang,Weigui Fu,Zihan An,Meixiu Sun,Yiping Zhao,Li Chen
Gelatin, a natural protein, is extensively used in the food, pharmaceutical, and cosmetics industries. However, purifying gelatin to meet the specific requirements of various industries remains a considerable challenge. Ceramic membrane separation technology, renowned for its high permeability, excellent anti-fouling properties, and long lifespan, has been widely applied in the food, biotechnology, and water purification industries. In this study, a sol-gel method was employed to fabricate a gradient multilayer TiO 2 -modified coating on the surface of an α-Al 2 O 3 porous ceramic membrane. The viscosity of the TiO 2 sols was adjusted by varying the concentrations of polyethylene glycol (PEG 2000) and aging times. The results indicated that coating the C-P5^5 composite membrane with a sol containing 5 wt% PEG, aged for different durations (2, 5, 10, 15, and 18 d), effectively reduced the weight-average molecular weight ( M w ) of the permeate from the feed solution of 52.4 kDa–11.9 kDa. However, the C-P10^5 composite membrane, with a 10 wt% PEG content and aged for the same durations, yielded a permeate gelatin M w of 13.6 kDa. The composite membrane with excellent anti-fouling and photocatalytic self-cleaning properties holds promise for innovative applications in gelatin purification and bio-separation processes.
研究领域:
材料科学
·
生物工程
·
化学工程
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Cong Wu,Chun Zhang,Xianyi Yan,Junhua Cheng,Lei Chen,Yufei Tang,Kang Zhao
Titanium implants have the risk of loosening or even failure, especially the force generated by chewing is not conducive to the use of conventional titanium bioactive coatings in the oral environment. In this work, a BCZT/TiO 2 bio-piezoelectric coating was prepared on titanium surface. The force generated by chewing is cleverly converted into the piezoelectric charge on the coating surface , and the formation of the combination of implant and alveolar bone is accelerated by its promoting effect on bone repair. The formation mechanism of the coating was studied. The BCZT/TiO 2 bio-piezoelectric coating showed good piezoelectric properties . The calcium deposition results of BCZT/TiO 2 coating with static , physiological loading and low-frequency ultrasonic conditions were compared. Interestingly, the effect of polarized BCZT/TiO 2 coating applied with low-intensity pulsed ultrasound on promoting calcium deposition was similar to that applied with physiological loading, suggesting that low-intensity pulsed ultrasound has the potential to stimulate piezoelectric effects. In addition, the BCZT/TiO 2 coating was non-toxic and has good biocompatibility and bioactivity. The polarized BCZT/TiO 2 coating showed the best proliferation results, and the osteoblast adhesion morphology on the coating surface was extended. The results provide data support for the application of titanium bio-piezoelectric coating on dental implants .
研究领域:
生物材料学
·
口腔医学
·
生物力学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Ying Zhang,Xuhuan Zhao,Shiqi Fu,Xiulong Lv,Qian He,Yingxin Li,Fangying Ji,Xuan Xu
An Ag/TiO 2 coating was deposited onto glazed ceramic tiles by a sol-gel and spraying method at high temperatures. The coating was characterized by X-ray diffraction, scanning electron microscopy, and atomic force microscopy . The results showed that silver was present in rutile-TiO 2 , and the temperature did not change the phase composition of the samples. The Ag/TiO 2 coating had a higher roughness than the TiO 2 coating. The tape test (D 3359–08) showed that the coatings prepared at 950 °C and 1000 °C had good adhesion to the ceramic tile substrate. The antibacterial activity of the coating was tested by photocatalytic sterilization experiments. The results showed that the Ag/TiO 2 coating had a higher antibacterial activity than the TiO 2 coating, and the sterilization efficiency of Escherichia coli, Staphylococcus aureus, Shigella , and Salmonella exceeded 99.655% under 2 h of visible light irradiation. This research provides a method to create Ag/TiO 2 coatings with good thermal resistance, adhesion, and antibacterial activity. This improves the low photocatalytic activity caused by the anatase-to-rutile transformation of TiO 2 at high temperatures and the poor adhesion at low temperatures.
研究领域:
材料科学
·
微生物学
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DOI
高影响因子
JOURNAL OF LIGHTWAVE TECHNOLOGY
·
2025
·
IF 4.8
Mingshi Song,Xili Jing,Zhiyong Yin,Shuguang Li
This paper designed a based on surface plasmon resonance (SPR) optical fiber type low crosstalk pH value and temperature sensor. The sensor has the ability to detect pH value and temperature simultaneously, and can overcome the error factor caused by temperature changes in the pH value detection process of optical fiber sensors. Sensor is based on a multimode fiber (MMF) fused with a coreless fiber (NCF) to build the sensing substrate. Ag was used as SPR excitation material and polyacrylic acid (PAA)/ chitosan (CS) composite membrane was used for pH detection. Compared with previous research on temperature compensation, the SPR cascade sensing method treated by TiO2/PDMS composite membrane significantly improved the temperature sensitivity of SPR signals and reduced crosstalk. This ensures that the SPR signal has a sufficient working range. In the range of -10°C ∼ 100°C, the maximum temperature sensitivity can reach -4.1301 nm/°C, and the detection limit (DL) is 0.1542°C. In the pH range of 4.08 ∼ 9.85, the sensor's pH sensitivity can reach up to -17.9359 nm/pH, and the resolution is 0.1272pH. Excellent sensing performance. The sensor is important for advancing future applications of high-precision temperature compensation detection, high-sensitivity pH biodetection, and SPR modulation technology.
研究领域:
传感技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
THIN SOLID FILMS
·
2018
·
IF 1.939
Bo Wang,Chao Chen,Hongtao Liu,Bingbing Xia,Yinan Fan,Tianchi Chen
Tungsten trioxide (WO 3 ) and titanium dioxide (TiO 2 ) decorated commercial stainless steel meshes (SSM 304) were fabricated by chemical deposition and dip coating. WO 3 and TiO 2 particles were firmly and uniformly coated on the membrane surfaces, forming rough micro-nano double structures with underwater superoleophobicity, large contact angles and low oil-adhesion characteristic. Furthermore, the as-prepared membranes achieved effective oil-in-water (O/W) emulsions separation with high efficiency up to 98.5% or more. The separation of O/W emulsions was easily implemented under gravity with water fluxes of >200 L m −2 h −1 or low pressure with water fluxes up to 1300 L m −2 h −1 or more. In addition, the superhydrophilic membranes with WO 3 /TiO 2 coatings were demonstrated for high oil rejection, stable underwater superoleophobic properties after abrasion treatment and steady water permeation flux after several cycles.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2018
·Vol. 7
·期 8
·1800829
·
IF 3.175
Bin Xiao,Peng-bo Wang,Zhen-jiang He,Zhuo Yang,Lin-bo Tang,Chang-sheng An,Jun-chao Zheng
0.5Li 2 MnO 3 ·0.5LiNi 0.5 Mn 0.3 Co 0.2 O 2 cathode materials with nano-MgO and nano-TiO 2 coating layers are synthesized via a facile approach. These nanocoating layers with a thickness of ≈20 nm are homogeneously coated on the surface of the materials. With the nano-MgO and nano-TiO 2 coating layers, the modified materials deliver excellent electrochemical performance. Nano-MgO-coated and nano-TiO 2 -coated Li-rich materials exhibit 147.56 and 137.96 mAh g −1 after 100 cycles at 1C rate and deliver 156.13 and 130.69 mAh g −1 at 2C rate, respectively, in the voltage range of 2.0–4.8 V. The materials with nano-MgO and nano-TiO 2 coating layers also show a high discharge voltage retention of more than 90% after 50 cycles, low impedance for Li + migration, and high diffusion coefficients of the lithium ions. Nano-MgO and nano-TiO 2 coating layers help decrease the content of Li 2 CO 3 on the surface of the materials and suppress side reactions. Thus, these materials play a significant role in strengthening the electrochemical performance of Li-rich cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaoyan Yu,Hua Lai,Hongjun Kang,Yuyan Liu,Youshan Wang,Zhongjun Cheng
Directional self-transportation of tiny droplets is significant in many fields. However, almost all existing studies focus on the phenomenon in air, and to realize similar performance in complex environments, such as oil, is still extremely rare. Here, we report a TiO2-coated conical spine (TCS) and demonstrate underoil directional self-transportation of water droplets on its surface. It is found that high surface hydrophilicity resulting from UV irradiation is necessary to achieve the self-transportation of water in oil. The critical water contact angle in oil is about 57°, and the maximal transport velocity can reach 1.4 mm/s. Mechanism analysis reveals that the excellent self-transportation property is ascribed to the combined effect between the Laplace force (FL) caused by the conical gradient structure and the hysteresis reduction resulting from the high hydrophilicity. Moreover, based on the special underoil self-transportation performance, a droplet-based microreaction and demulsification of water-in-oil emulsions were demonstrated using the TCS. This work reports the self-transportation of water in oil, which could provide some fresh ideas for designing new superwetting self-transportation materials.
研究领域:
材料科学
·
界面化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 31
·17941-17949
·
IF 3.049
Xinxin Li,Hebang Shi,Bo Wang,Na Li,Liqiang Zhang,Pengpeng Lv
Surface coating of metal oxides is an effective approach for enhancing the capacity retention of a nickel-rich layered cathode. Current conventional coating techniques including wet chemistry methods and atomic layer deposition are restricted by the difficulty in perfectly balancing the coating quality and scale-up production. Herein, a highly efficient TiO2 coating route through fluidized bed chemical vapor deposition (FBCVD) was proposed to enable scalable and high yield synthesis of a TiO2 coated nickel-rich cathode. The technological parameters including coating time and TiCl4 supply rate were systematically studied, and thus a utility TiO2 deposition rate model was deduced, promoting the controllable TiO2 coating. The FBCVD TiO2 deposition mechanism was fundamentally analyzed based on the TiCl4 hydrolysis principle. The amorphous and uniform TiO2 coating layer is compactly attached on the particle surface, forming a classical core–shell structure. Electrochemical evaluations reveal that the TiO2 coating by FBCVD route indeed improves the capacity retention from 89.08% to 95.89% after 50 cycles.
研究领域:
材料科学
·
化学工程
·
能源技术
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Yada Li,Weiqiang Wang,Fengyun Yu,Dongjiao Wang,Shiwei Guan,Yan Li,Min Qi
Calcium (Ca) and strontium (Sr) are beneficial for bone reconstruction. This study incorporated Ca and Sr into the TiO 2 coatings by one-step micro-arc oxidation (MAO) treatment with CaO and SrO added in tetraborate electrolytes. The structure, composition, hydrophilicity, ion release, and cytocompatibility of the coatings were studied. The coatings combine layered micron-scale pores in various sizes and nano-scaled pores, forming a hierarchical structure. This hierarchical structure is highly porous and super-hydrophilic. The coatings are composed of Ti, O, and B, as well as Ca or Sr. Ca and Sr mainly distribute in the outer layer of the coatings and exist in the forms of carbonates and oxides. The formation of the coatings was discussed. Ca and Sr incorporated into the coatings are readily released into aqueous solutions. The homogeneous surface structure of the coatings leads to an excellent and approximating performance in hydrophilicity, as well as the adhesion and spreading of the human bone marrow-derived mesenchymal stem cells (hBMSCs). The simultaneous incorporation of Ca and Sr incorporation exhibits superior facilitation in the proliferation of hBMSCs compared with single Ca or Sr incorporation. This study shows a promising method to incorporate bioactive elements into the MAO coatings on titanium surfaces.
研究领域:
生物材料
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Yada Li,Weiqiang Wang,Huiying Liu,Jingwu Lei,Jingying Zhang,Hongzhi Zhou,Min Qi
A novel “cortex-like” micro/nano dual-scale structured TiO 2 coating was prepared on a titanium surface by micro-arc oxidation (MAO) with tetraborate electrolytes. This structure, which combines microslots with nanopores, exhibits super hydrophilicity. This coating modified the surface structure, chemistry, and hydrophilicity in a one-step treatment. Evolution of the coating together with its surface and structure properties was studied. We propose a forming mechanism of the dual-scale structure in which the oxides formed during the MAO discharge dissolve in the tetraborate electrolytes, leaving little or no deposition outside the discharge channels. We performed in vitro tests using human bone marrow-derived mesenchymal stem cells (hBMSCs) that compared this coating with a “volcano-like” MAO coating and a commercial sandblasted, large-grit and acid-etched (SLA) coating. The adhesion, morphology, proliferation, and differentiation of hBMSCs, together with the matrix mineralization, were investigated. Results suggest that the “cortex-like” structure significantly promotes the adhesion, spreading, and differentiation of cells and increases the matrix mineralization. In vivo tests with mongrel dogs showed an excellent osseointegration of the “cortex-like” coating. The combination of the dual-scale structure and the hydrophilicity of the “cortex-like” TiO 2 coating synergistically resulted in an outstanding cytocompatibility and osseointegration, which may facilitate a higher level of implant success.
研究领域:
生物材料
·
组织工程
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Nianbing Zhong,Ming Chen,Haixing Chang,Tianheng Zhang,Zhengkun Wang,Xin Xin
We present a high-selectivity photochemical fiber-optic sensor in which a plastic optical fiber (POF), TiO 2 -based composite, and polymer membrane are coupled for detection of phenol concentrations in water. A thinned POF is coated with TiO 2 -based composite, which is composed of Er 3+ :YAlO 3 /SiO 2 /TiO 2 (EYST) and acts as the sensing region. The EYST coating shows good light-inducing capacity at the core–coating interface and high photocatalytic activity in the visible light region. The polymer membrane is synthesized using PEBA2533 doped with β-cyclodextrin and shows high phenol selectivity and permeability; thus, phenol molecules can freely permeate the membrane and are then transferred, become attached to the surface of TiO 2 nanoparticles, and are photocatalytically degraded. Photocatalytic degradation of phenol improves the refractive index (RI) and absorbance of the solution because of the photocatalytic byproducts; consequently, the transmitted output light intensity of the sensor changes, and the phenol concentration is accurately detected by measuring the change in the light intensity. Experimental results indicate that the prepared device detects phenol in water with high selectivity and pH independence; in phenol detection, the novel sensor shows a sensitivity of −0.195 × 10 −3 (mg/L) −1 and a low limit of detection of 40 μg/L.
研究领域:
环境科学
·
分析化学
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Ze Li,Zhen-Liang Xu,Ben-Qing Huang,Yu-Xuan Li,Ming Wang
Superior anti-fouling property, excellent mechanical strength, high flux and rejection of the membrane are essential for the separation of oil/water emulsions. In this work, a crack-free TiO 2 layer was fabricated on the inner surface of three-channel stainless steel hollow fiber (TCSSHF) membrane, which was coated with nano-TiO 2 particles suspension and polyvinyl alcohol (PVA) solution and then calcined at 500 °C. The prepared nano-TiO 2 modified three-channel stainless steel hollow fiber (TiO 2 -TCSSHF) membrane was systematically characterized by scanning electron microscopy (SEM), pore size distribution, water contact angle and dynamic underwater oil-adhesion measurement. TiO 2 -TCSSHF membrane showed a permeation flux of 760 L m −2 h −1 and a rejection of 99.8% for the separation of 5000 ppm vegetable oil/water emulsion at 0.10 MPa. The membrane also showed the superior fouling resistance and recyclability. Therefore, TiO 2 -TCSSHF membrane provided a promising potential for the practical application of the oil/water emulsion separation.
研究领域:
膜科学
·
环境工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）