Nanomaterials
·
2025
·Vol. 16
·期 1
·35
·
IF 4.3
Wenjing Wu,Zichao Yang,Min Zhang,Zhongjie Guan,Jianjun Yang
Photocatalytic reduction of carbon dioxide is a very effective strategy to address the energy crisis and greenhouse effect. TiO2is a widely used semiconductor photocatalyst, which has excellent catalytic activity, excellent chemical stability and low toxicity. Nevertheless, TiO2still has some inherent limitations, such as: wide band gap, high carrier recombination rate, and low adsorption activation ability for carbon dioxide. These drawbacks severely restrict its further application in the photocatalytic reduction of CO2. In this study, cotton-like blue C/TiO2NTs are successfully synthesized through the in situ growth of TiO2nanotubes on the MIL-125(Ti)-derived C/TiO2precursor. The experimental results revealed that the CO production rate of the cotton-like blue C/TiO2NTs was 1.84 times that of C/TiO2and 3.78 times that of TiO2nanotubes. These results clearly demonstrate that the cotton-like blue C/TiO2NTs exhibit a broad spectral response, a large specific surface area, and an abundance of oxygen vacancies. This research provides new insights into the design of titanium dioxide-based photocatalytic materials and opens up a promising avenue for enhancing the performance of titanium dioxide in the photocatalytic reduction of carbon dioxide.
研究领域:
材料科学
·
光催化
·
环境工程
·
纳米技术
·
能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Martin C. Koo,Yu Zhang,Bo Cai,Chen-Ming Liang,Shao-Hang Shi,Hua-Long Peng,Shu-Hao Yang,Xiao-Bo Sun,Guang-Sheng Wang
Microwave-absorbing materials (MAMs) play an important role in reducing electromagnetic pollution. However, achieving a balance between low filler loading, low minimum reflection loss (RL min ) and wide effective absorption bandwidth (EAB) for efficient absorption of microwaves remains challenging. In this work, an innovative method of using CO 2 atmosphere annealed Ti 3 C 2 T x MXene (C/TiO 2 ) combined with nickel nanowires (NiNW) via ultrasonic treatment was performed to yield C/TiO 2 /NiNW (CTN) composites with abundant NiNW/TiO 2 contacts. The electromagnetic (EM) parameters of the as-synthesized composites were closely studied through a series of experiments and computed theoretical calculations. Through the establishment of built-in electric fields (BIEFs) at the NiNW/TiO 2 interface, the derived CTN composite demonstrated improved dielectric properties and impedance matching characteristics that are clearly reflected on the microwave absorption performance of our as-synthesized MAMs, with RL min improving by 127.9% from −31.93 dB to −72.77 dB, and widest EAB increasing by 25.9% from 4.25 GHz to 5.35 GHz, at a low filler loading of 10 wt.%. This work investigates the mechanisms by which BIEFs influence EM parameters, providing critical insights into improving microwave absorption performance via BIEF structural design.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Lifen Su,Haoming Xie,Xiaoyu Liu,Bin Yang,Jibin Miao,Ru Xia,Jiasheng Qian,Lei Miao
Although the solar interfacial evaporation technology with the advantages of outstanding photothermal conversion, easy availability and high freshwater production, their photothermal materials still face the problem of contaminated by the organic pollutants in the raw waters such as sewage and natural water. Herein, we present a vertically oriented hierarchical C/TiO 2 nanotubes with bifunction of photocatalytic degradation of pollutants and freshwater production via photothermal effect synchronously. The carbon nanoparticles of the hierarchical C/TiO 2 nanotubes not only broaden the range of sunlight absorption to accelerate the water evaporation, but also reduced the recombination of electron-hole significantly to improve the photocatalytic efficiency. Meanwhile, the excellent water transportation via unique arranged arrays vertically, the abundant active sites derived from hierarchical structure, the vertical oriented C/TiO 2 nanotubes exhibit a large solar-driven water evaporation rate of 1.59 kg m −2 h −1 and the methyl orange (MO) photodegradation efficiency of 92.9 % for the underneath sewage under 1 sun illumination synchronously. These findings have great potential applications in solar-powered production freshwater from wastewater and natural waters such as rain and river water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Xin-Zheng Yue,Chuan-Qi Li,Zhong-Yi Liu,Sha-Sha Yi,De-Liang Chen,Feng Wang,Shuai-Hui Li
The constructing of functional materials with well-defined nanostructure , showing efficient charge separation and transportation properties, has been intensively and in depth investigated to fabricate catalysts for H 2 generation from solar-driven water reduction. Here we demonstrate that loading W 2 C@C structure in which each W 2 C nanoparticle (NP) is wrapped by carbon shell on surface of hollow TiO 2 microspheres (HTMs) can enhance the separation of photogenerated electron-hole pairs by building an internal electric field in W 2 C@C/HTMs composite structure and act as the reaction active sites for water reduction. As expected, the optimized W 2 C@C/HTMs construction exhibits the highest photocatalytic H 2 generation rate of 6.91 mmol h −1 g −1 under simulated solar light illumination, over 20 times larger than that of bare HTMs. The underlying mechanism has been investigated from the perspective of photochemistry and photophysics based on a series of characterization techniques, which suggests that W 2 C@C can effectively steer the charge kinetics, maximizing the charge carriers’ separation.
研究领域:
材料科学
·
光催化
·
纳米技术
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yalong Liu,Binjie Xin,Md All Amin Newton,Lifeng Li,Dan Huang
Oil pollution poses severe threats to both ecosystems and human health. This study utilized electrospinning and carbonization processes to fabricate a SiO2-TiO2-C nanofiber membrane (STCNFM) exhibiting photocatalytic self-cleaning properties designed explicitly for oil-water separation. These membranes possess nanoscale rough structures, endowing them with superoleophilicity (0°) and hydrophobicity (138°). Addressing the limitations associated with traditional ceramic membranes, particularly in terms of stability and reproducibility, cyclic experiments confirm the significant stability and reproducibility of this composite membrane, ensuring reliable long-term applications for continuous oil-water separation. Leveraging the synergistic effect of TiO2 and the carbon fiber substrate, STCNFMs-5 demonstrate exceptional separation performance and notable self-cleaning capabilities. Following a 2-h exposure to ultraviolet light, the membrane's flux is restored to its original level. STCNFMs offer a promising solution for efficiently separating oil-water mixtures and emulsions, holding potential importance in water treatment and resource recovery endeavors.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2024
·
IF 4.6
Binxia Yuan,Yuhao Liu,Hong Qian,Rui Zhu,Chengxi Zhang,Weiling Luan
In this study, the theoretical calculations proves that the combination of oxygen vacancy and amorphous carbon films in TiO 2 (V O -CT) can effectively reduce the energy bandgap and work function. The minimum Gibbs free energies required for the CO 2 RR reaction of V O -CT are 0.20 eV, which is lower than pure TiO 2 . The amorphous c@TiO 2 nanomaterials with oxygen vacancy and mesoporous structures (V O -MCT) are prepared with the P123 surfactant as the template and oxalic acid as an inducer. The electron paramagnetic resonance indicates the presence of abundant oxygen vacancy defects in the samples. UV-vis spectra indicate that the mesoporous structure enhances light absorption capacity. The photocatalytic CO 2 reduction tests show that the highest conversion rates for CH 4 and CO of V O -MCT are 14 μmol g −1 h −1 and 10.66 μmol g −1 h −1 , respectively. The electron consumption rate of V O -MCT is 12.43 times higher than that of commercial TiO 2 (P200).
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 24
·22297-22311
·
IF 2.22
Guan Yiyin,Liu Wenjie,Zuo Shixiang,Yuan Kun,Wu Fengqin,Ji Jinjin,Yao Chao
In this paper, rutile phase titanium oxide/Sb-SnO 2 /anatase phase titanium oxide (TiO 2 (R)/C-TiO 2 (A)) heterostructured nanocomposites were prepared by a sol–gel method and a hydrothermal method. By optimizing the mass ratio between TiO 2 (R) and C-TiO 2 (A), the rod-ball heterostructures of TiO 2 (R)/C-TiO 2 (A) were formed and exhibited enhanced simulated sunlight-driven photocatalytic desulfurization performance. According to the results, the desulfurization rate of TiO 2 (R)/C-TiO 2 (A) was 93.98% after 60 min, which is higher than C-TiO 2 (A) and TiO 2 (R)/TiO 2 (A). In addition, the photocatalytic recyclability test indicated that after three times the reuse of TiO 2 (R)/C-TiO 2 (A) could still reach 85.98%. The enhanced photocatalytic performance could be attributed to the double Z-scheme heterojunction in the TiO 2 (R)/C-TiO 2 (A) and the uniformly structure of rod array, which resulted in the higher separation efficiency of electrons and holes. Furthermore, the results of photocatalytic active radical species trapping experiments showed that the main substances in the photocatalytic reaction are ∙O 2 − and h + . This paper also established the double Z-scheme heterojunction reaction mechanism.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xin He,Ming Wu,Zhimin Ao,Bo Lai,Yanbo Zhou,Taicheng An,Shaobin Wang
A series of in-situ carbon-doped TiO 2 (C x /TiO 2 ) composites with a porous and crystalline structure were successfully synthesized via one-step and low-temperature calcination of titanium metal–organic framework (MOF), MIL-125(Ti). The resultant materials were comprehensively investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), N 2 adsorption–desorption measurements, UV–vis diffuse reflectance spectrum (DRS), photoluminescence (PL) spectra and photoelectrochemical measurements, and their photocatalytic activities for bisphenol A (BPA) degradation were assessed. Compared with the benchmark TiO 2 photocatalyst (P25), the C x /TiO 2 composite material with high specific surface, lower band gap, and reduced photogenerated electron hole ratio exhibited outstanding photodegradation activity and durability for BPA, which could be attributed to the combined effect of co-doping of multiple carbon species (substituent carbon and carbonate) and porous structure. During BPA degradation, the holes and superoxide radicals were the primary role oxidative species in the reaction process. Therefore, this new efficient photocatalyst is promising candidate for photodegradation of organic pollutants .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Shaoming Yang,Yaqi Wang,Jiayi Chen,Yun Feng,Jiahui Li,Yongxin Liu,Liangpeng Zeng,Ji Zhao,Jiali Zhang
Owing to its environmental compatibility and energy conservation properties, photocathodic protection (PCP) has emerged as a promising approach for metal corrosion protection. The key to efficient PCP lies in developing semiconductor composite materials that combine excellent photoelectrochemical performance with a simple preparation process. Herein, a carbon-doped TiO 2 /Bi 2 S 3 composite (Bi 2 S 3 /C-TiO 2 ) was fabricated via a single-step, low-temperature hydrolysis strategy using NH 2 -MIL-125(Ti) as the precursor, concurrently achieving carbon doping and incorporating a narrow-bandgap semiconductor. Characterization by UV-Vis diffuse reflectance spectroscopy and photoelectrochemical testing under illumination revealed that the composite exhibits significantly enhanced visible-light absorption while effectively suppressing photogenerated charge carrier recombination. Under optimized conditions, the Bi 2 S 3 /C-TiO 2 photoanode shifted the potential of coupled 304 stainless steel (304SS) to −464 mV (vs. Ag/AgCl) under visible-light irradiation—substantially below its corrosion potential—demonstrating effective photogenerated cathodic protection for 304SS.
研究领域:
材料科学
·
电化学
·
腐蚀防护
·
半导体复合材料
·
能源与环境材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Long Liu,Xinxi Li,Gen He,Guoqing Zhang,Guanji Su,Chenhui Fang
Silicon-based materials have been widely used as anode materials in lithium-ion batteries (LIBs) because of the high specific capacity. However, there exist some shortcomings, especially in the thermal stability of the batteries, as well as huge volume expansion (＞300%) causes structural cracking. Herein, a core-shell structured SiO@C/TiO 2 nanospheres has been successfully synthesized via ball milling and sol-gel method, the morphological, componential and thermal features are characterized with X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy. The results exhibit that the SiO could spontaneously absorb the huge volume expansion stress, the C/TiO 2 shell as a compact fence was utilized to effectively enhance the electrical conductivity and further control the integrity and stability of well-wrapped core-shell framework during the charge/discharge processes. The electrochemical analysis show the SiO@C/TiO 2 nanospheres possess a remarkably high initial coulomb efficiency of 97%. The reversible capacity can reach to 1565 mA h g −1 at 0.1 A g −1 after 100 cycles, which is higher than those of N–SiO (1353 mA h g −1 ) and SiO@C (1326 mA h g −1 ). Even at 2 A g −1 , it exhibit a discharge capacity of 844.6 mA h g −1 after 220 cycles. This excellent performance can be primarily attributable to the well-designed core-shell structure of SiO@C/TiO 2 nanospheres, where the outer rigid C/TiO 2 coating can not only effectively alleviate the large volume change of SiO but also maintain the stable structure of anode materials, which are considered as a promising candidate to the anode material for new generation power LIBs.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lifen Su,Xiaoyu Liu,Wei Xia,Bin Wu,Changjiang Li,Bo Xu,Bin Yang,Ru Xia,Jianhua Zhou,Jiasheng Qian,Lei Miao
Solar-driven water evaporation is a promising technology of freshwater production to address the water scarcity. However, the photothermal material and the distilled water would be contaminated in the evaporation of wastewater including organic pollutants . In this work, MOF-derived C/TiO 2 composites (carbonized UiO-66-NH 2 (Ti)) with simultaneous photothermal and photocatalytic functions are designed for producing freshwater from sewage. With advantageous features of porous structure with large specific area, excellent sunlight absorption and super-hydrophilicity, the carbonized UiO-66-NH 2 (Ti) layer exhibits high water evaporation efficiency of 94% under 1.0 sun irradiation. Meanwhile, the layer can simultaneously decompose the organic pollutants with degradation efficiency of 92.7% in the underlying water during solar-driven water evaporation. This bifunctional material will provide a new approach for solar-driven water evaporation and photocatalytic degradation of organic pollutant synergistically.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 5
·365
·
IF 4.3
Yijie Shen,Zhe Liu,Renke Bi,Bianbian Zhou,Yan Wang,Jialong Liu,Zhiyu Wang,Bing Han
Photodegradation of antibiotics based on photocatalytic semiconductors is a promising option to alleviate water pollution. Despite its limitations, TiO2-based photocatalysts are still the most widely studied materials for pollutant degradation. In this work, a pomegranate-like g-C3N4/C/TiO2nano-heterojunction was constructed using the hydrothermal–calcination method, consisting of interconnected small crystals with a dense structure and closely contacted interface. Low-crystallized carbon filled the gap between TiO2and g-C3N4, forming a large interface. The local in-plane heterostructures generated by C/g-C3N4are further improved for carrier transport. As expected, the optimal sample calcined at 300 °C (GTC-300) efficiently eliminated tetracycline hydrochloride (TC-HCl, 20 mg L−1), achieving a removal rate of up to 92.9% within 40 min under full-spectrum irradiation and 87.8% within 60 min under the visible spectrum (λ > 400 nm). The electron mediator, low-crystallized carbon, successfully promoted the formation of new internal electric fields via the widespread heterojunction interface, which accelerated the separation and migration of photogenerated carriers between g-C3N4and TiO2. These results confirm that the g-C3N4/C/TiO2nano-heterojunction exhibited outstanding photodegradation performance of TC-HCl. The electron mediator shows great potential in promoting carrier transfer and enhancing photocatalytic performance of heterogeneous photocatalysts in water treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）