Advanced Science
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2025
·
IF 14.1
Chaofeng Wang,Shuilin Wu,Congyang Mao,Liguo Jin,Hanpeng Liu,Yufeng Zheng,Chunyong Liang,Shengli Zhu,Zhaoyang Li,Hui Jiang,Xiangmei Liu
Sonodynamic therapy (SDT) is recognized as an effective method for treating deep tissue bacterial infections, but enhancing charge transfer to achieve efficient SDT remains a formidable challenge. Here, deficient TiO 2 (DTO) is fabricated and Barium titanate (BTO) heterojunction with oxygen vacancies (OVs) and abundant Ti 3+ species on a Ti substrate. The OVs in DTO not only narrow the band gap of TiO 2 but also expedite the transfer of surrounding electrons to Ti 3+ . Meanwhile, the spin-polarization effect induced by the unpaired spin electrons in Ti atoms can expedite the transfer of ultrasonic piezoelectric charges in BTO, enhancing surface sonocatalytic efficiency. Consequently, the DTO/BTO with US irradiation can eradicate 99.82% of Staphylococcus aureus and inhibit biofilm formation. Additionally, the microcurrent generated by ultrasound-excited DTO/BTO enhanced mitochondrial fusion and promoted osteoblastic differentiation. The successful application of this ultrasound-mediated DTO/BTO in treating bone infection defects offers an effective antibiotic-free therapeutic strategy for deep-seated infections.
研究领域:
生物医学工程
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材料科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Guohui Li,Yuanyuan Sun,Qingming Zhang,Zhe Gao,Wei Sun,Xiaoxia Zhou
Photocatalytic reduction of CO 2 into high added-value chemical products has received special attention. Herein, we designed a novel hierarchically porous and defective TiO 2 modified by Ag quantum dots via a hydrothermal process assisted with organic surfactant and subsequently in-situ photodeposition method. The obtained Ag quantum dots modified TiO 2 (Ag/TiO 2 ) shows excellent and stable photocatalytic activity in CO 2 reduction. In addition, the competing H 2 evolution can be completely suppressed. The super photocatalytic activity can be ascribed to the design of hierarchically porous, the intrinsic defects in TiO 2 , the localized surface plasmon resonance of Ag and the synergetic effect between Ag quantum dots and defective TiO 2 , which jointly improves the CO 2 adsorption performance, enhances visible light absorption capacity and accelerates the separation of photogenerated charges. This work may provide a strategy to design and synthesis defective and hierarchically porous metal oxides for photocatalytic CO 2 reduction.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Catalysts
·
2019
·Vol. 9
·期 11
·927
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IF 3.444
Aiguo Han,Mei Li,Shengbo Zhang,Xinli Zhu,Jinyu Han,Qingfeng Ge,Hua Wang
In recent years, defective TiO2-based composite nanomaterials have received much attention in the field of photocatalysis. In this work, TiB2was used as a precursor to successfully prepare Ti3+defective TiO2(TiO2-B) with a truncated bipyramidal structure by a one-step method. Then, the SnS2nanosheets were assembled onto the as-prepared TiO2-B through simple hydrothermal reaction. TiO2-B exhibits strong visible light absorption properties, but the recombination rate of the photo-generated electron-hole pair was high and does not exhibit ideal photocatalytic performance. Upon introducing SnS2, the heterojunction catalyst SnS2-Ti3+defective TiO2(SnS2/TiO2-B) not only possesses the strong light absorption from UV to visible light region, the lowest photo-generated charge recombination rate but also achieves a more negative conduction band potential than the reduction potential of CO2to CO, and thereby, exhibits the significantly enhanced selectivity and yield of CO in photocatalytic CO2reduction. Notably, SnS2/TiO2-B produces CO at a rate of 58 µmol·h−1·g−1with CO selectivity of 96.3% under visible light irradiation, which is 2 and 19 times greater than those of alone TiO2-B and SnS2, respectively. Finally, a plausible photocatalytic mechanism on SnS2/TiO2-B was proposed that the electron transfer between TiO2and SnS2follows the Z-scheme mode. Our results present an effective way to gain highly efficient TiO2based photocatalysts for CO2reduction by combining different modification methods of TiO2and make full use of the synergistic effects.Keywords:photocatalytic CO2reduction;TiO2nanoplates;SnS2nanosheets;Ti3+defective TiO2
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Jiale Shen,Danyun Xu,Jian Ji,Qicheng Zhang,Xiaobin Fan
Sodium borohydride (NaBH 4 ) has been proposed to be a realizable hydrogen supplier for proton-exchange membrane fuel cell. Cobalt boride (CoB) is one of the most promising non-precious metal-based catalysts toward NaBH 4 hydrolysis. In this work, we develop a facile method to synthesize defects-rich TiO 2 supported CoB nanoparticles (CoB/TiO 2- x ). In this CoB/TiO 2- x , an electronic metal-support interaction is induced by transferring electrons from the defective TiO 2 to CoB to form electron-rich CoB particles, facilitating the hydrolysis of NaBH 4 . The as-synthesized CoB/TiO 2- x catalyst shows a good catalytic performance with hydrogen generation rate of 3070 mL min −1 g Co −1 and activation energy of 57.03 kJ mol −1 .
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Chun-Feng Li,Xiaojing Guo,Qing-He Shang,Xi Yan,Cuilan Ren,Wan-Zhong Lang,Ya-Jun Guo
Nonoxidative propane dehydrogenation (PDH) has become a more attractive process worldwide because of the low cost and abundance of shale gas that has recently become available. Orthodox catalysts for PDH based on Pt and CrOx face challenges because of the high cost of the former and the toxicity of the latter. Herein, we present defective TiO2-based catalysts for the PDH reaction, which are inexpensive and eco-friendly. Comprehensive characterizations of their structure, morphology, and surfaces reveal that the fourfold-coordinated titanium atoms surrounding oxygen vacancies (OVs) are the main active sites for PDH. Density functional theory calculations have been employed to further explain the superior catalytic properties of defective TiO2 for PDH. Experimental results have demonstrated that the catalytic performance of PDH was significantly improved using TiO2 subjected to a reduction treatment. Moreover, the hydrogen reduction temperature for pristine TiO2 was found to influence the catalytic performance.
研究领域:
催化化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Chengzhang Zhu,Xiao Chen,Jian Ma,Cheng Gu,Qiming Xian,Tingting Gong,Cheng Sun
Inducing TiO2 sensitive to visible light and effectively restraining the possibility of electron–hole recombination are crucial for actual applications over TiO2-based catalysts. In this study, a facile strategy to fabricate three-dimensional (3D) defective TiO2–x@carbon spheres (CSs) composite modified with two-dimensional (2D) graphite-like carbon nitride (g-C3N4) nanosheets (NSs) is presented. During the synthesis process, zero-dimensional tiny TiO2–x nanoparticles were evenly loaded onto CSs with intimate chemically bonded (Ti–O–C) interfaces. Simultaneously, loose g-C3N4 NSs were tightly coated on the hierarchical spherelike TiO2–x@CSs, with the purpose of supporting an effectively protective layer to prevent the oxidation of the directly exposed Ti3+ and constructing highly efficient 2D/3D ternary heterostructures with strong interfacial interaction. The obtained CSs/TiO2–x@g-C3N4 heterojunction showed remarkably enhanced photocatalytic activity in hydrogen production and toxic pollutants degradation compared to the binary composites or pristine components, mainly due to the cooperative effects of the enhanced visible-light-harvesting capacity introduced by Ti3+ and CSs, effective interfacial charge separation (Ti–O–C structure and heterostructure), and the vectorial charge-transfer channel design. This work paves a green, gentle, and economical way to design more efficient TiO2–x new ternary materials with multistep electron transfer toward solar energy conversion (like CO2 reduction and H2 evolution).
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ying Xu,Kang Xue,Minhua Ai,Zehao Han,Chengxiang Shi,Ruijie Gao,Xiangwen Zhang,Ji-Jun Zou,Lun Pan
Dehydrogenation reaction occurs for the hydrogen release process of liquid organic hydrogen carriers (LOHCs), the regenerative cooling of advanced aircraft, etc. But the synergistic effects of Pt active sites are still ambiguous. Herein, a series of Pt-based catalysts with tunable Pt 0 -Pt δ+ sites were fabricated by changing the ratio of highly dispersed defected TiO 2 on MCM-41 (M41) for efficient dehydrogenation of methylcyclohexane (MCH). The characterizations indicate TiO 2 nanoparticles (NPs) are highly dispersed on M41 support, and possess abundant Ti 3+ /oxygen vacancies. The increase of TiO 2 loading amount can enhance the interaction between Pt NPs and TiO 2 , which increases Pt δ+ /Pt 0 ratio gradually. The dehydrogenation test and theoretical results confirm that the synergistic effect of Pt 0 and Pt δ+ sites contributes the optimal dehydrogenation performance, in which Pt 0 promotes the consecutive C–H bond cleavage and Pt δ+ significantly decreases the desorption energy barrier for H 2 and toluene (TOL). Specifically, the MCH conversion (when applied for LOHCs) is ca. 88 % and the selectivity of TOL is over 99.5 % under 1.0Pt/0.5TiO 2 /M41, while the high MCH conversion of 90 % and TOL selectivity of more than 86 % are achieved under 1.0Pt/1.0TiO 2 /M41 (as regenerative cooling for hypersonic vehicle). This work provides the approach of modulating the synergistic active sites to obtain high-performance dehydrogenation catalyst.
研究领域:
催化化学
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材料科学
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能源化学
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2024
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IF 8.2
Xin Jiang,Kaiwei Li,Yimin Tang,Xiuwen Wang,Wei Kan,Libin Yang,Bing Zhao
High-performance flexible semiconductor material can be used as an excellent multifunctional matrix for in-situ ultrasensitive surface-enhanced Raman scattering (SERS) detection and synchronous photocatalytic degradation of antibiotic residues in aquatic ecosystem. Here, a calcium-doped TiO 2 flexible matrix with double defects (surface oxygen vacancy defect and Ti 3+ energy level defect) was developed by its “in-situ one-step” hydrothermal synthesis on cotton fabric for the above purposes. Due to the joint contribution of double defects, a multi-channel charge transfer mode and a high-efficiency carrier separation are achieved, which endows flexible cotton fabric/Ca-doped TiO 2 (Cot/Ca-TiO 2 ) substrate with the greatly boosted SERS effect for in-situ detection of antibiotic residues on fish body surface and in fishpond water by a simple wiping or dipping sampling method, even for simultaneous identification of multi-component residues. The detection limits of three antibiotic residues (enrofloxacin, ciprofloxacin and enoxacin) are as low as 10 −9 M, which are far lower than the EU standard. More meaningfully, the flexible Cot/Ca-TiO 2 can be used as a multifunctional filter-membrane type photocatalyst for efficient on-site degradation of antibiotic residues in flowing fishpond water by a multi-grade photocatalysis means. Moreover, the flexible matrix exhibits good recyclability in both actual detection and photocatalysis.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
·
IF 3.9
Tongtong Zhang,Xibo Zhang,Fei Chang
The industrial production of ammonia predominantly relies on the well-established Haber-Bosch process, which operates under harsh conditions (350–500 °C and 15–35 MPa). This process consumes nearly 2% of the world’s energy production and is associated with significant carbon emissions. Consequently, there is an urgent need to develop efficient catalytic processes for ammonia synthesis that can operate at milder temperatures and pressures. In this work, we introduce a synergistic photothermal ammonia synthesis process using ruthenium (Ru) catalysts supported on defective titania (TiO2-x). A solid-state mechanical reduction method was employed to create oxygen vacancies in TiO2, resulting in the formation of TiO2-x. The Ru nanoparticles on TiO2-x with moderate oxygen vacancies exhibited high dispersion, with an average particle size of 2–3 nm. Owing to the plasmonic hybridization effect between TiO2-x and Ru nanoparticles, the Ru/TiO2–x system demonstrated full-spectrum solar-light absorption and enabled photothermal ammonia synthesis at low temperature (250 °C). This system achieved nearly a 300% enhancement in activity compared to that of traditional thermal catalytic processes. Kinetic studies revealed a decrease in apparent activation energy and reaction orders of N2 and NH3 upon solar illumination of Ru/TiO2–x, indicating its remarkable photothermal promotion of nitrogen activation and ammonia desorption. Our findings underscore the significance of the photothermal effect in activating inert nitrogen molecules and achieving ammonia synthesis under mild conditions, providing valuable insights into the design of future catalysts.
研究领域:
催化化学
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材料科学
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化学工程
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纳米技术
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环境科学
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产品关联
DOI
高影响因子
Bioactive Materials
·
2020
·
IF 8.724
Yingde Xu,Xiangmei Liu,Yufeng Zheng,Changyi Li,Kelvin Wai Kwok Yeung,Zhenduo Cui,Yanqin Liang,Zhaoyang Li,Shengli Zhu,Shuilin Wu
Both phototherapy via photocatalysts and physical puncture by artificial nanostructures are promising substitutes for antibiotics when treating drug-resistant bacterial infectious diseases. However, the photodynamic therapeutic efficacy of photocatalysts is seriously restricted by the rapid recombination of photogenerated electron–hole pairs. Meanwhile, the nanostructures of physical puncture are limited to two-dimensional (2D) platforms, and they cannot be fully used yet. Thus, this research developed a synergistic system of Ag 3 PO 4 nanoparticles (NPs), decorated with black urchin-like defective TiO 2 (BU–TiO 2-X /Ag 3 PO 4 ). These NPs had a decreased bandgap compared to BU-TiO 2-X , and BU-TiO 2-X /Ag 3 PO 4 (3:1) exhibited the lowest bandgap and the highest separation efficiency for photogenerated electron–hole pairs. After combination with BU-TiO 2-X , the photostability of Ag 3 PO 4 improved because the oxygen vacancy of BU-TiO 2-X retards the reduction of Ag + in Ag 3 PO 4 into Ag 0 , thus reducing its toxicity. In addition, the nanospikes on the surface of BU-TiO 2-X can, from all directions, physically puncture bacterial cells, thus assisting the hybrid's photodynamic therapeutic effects, alongside the small amount of Ag + released from Ag 3 PO 4 . This achieves synergy, endowing the hybrid with high antibacterial efficacy of 99.76 ± 0.15% and 99.85 ± 0.09% against Escherichia coli and Staphylococcus aureus , respectively, after light irradiation for 20 min followed by darkness for 12 h. It is anticipated that these findings may bring new insight for developing synergistic treatment strategies against bacterial infectious diseases or pathogenic bacterial polluted environments.
研究领域:
材料科学
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纳米技术
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生物医学工程
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Ping Zhang,Xiangtong Wang,Xiaoping Su,Xiaohong Wei,Qiong su,Lijuan Han
In order to take advantage of the magnetic response properties of Fe 3 O 4 and the excellent photocatalytic activity of P 25 , water-soluble divalent iron salts and trivalent iron salts were used as raw materials; Fe 3 O 4 nanoparticles were grown in situ on TiO 2 nanotubes (TNTs) under alkaline hydrothermal conditions to synthesize magnetically separable defect TNTs nanocomposites. The composites were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and other test methods. The morphology, crystal structure and saturation magnetization of the composites were analyzed. The adsorption and photocatalytic properties of magnetic Fe 3 O 4 /TNTs nanocomposites were evaluated by simulating the photocatalytic adsorption and degradation of tetracycline hydrochloride (TC) by magnetic Fe 3 O 4 /TNTs nanocomposites under sunlight. The results show that the magnetic separation of Fe 3 O 4 /TNTs nanocomposites has good magnetism, and the saturation magnetization is 22.60 emu/g, which can realize the separation and recovery of the composites. The removal rate of tetracycline hydrochloride by magnetic Fe 3 O 4 /TNTs nanocomposite was 90.96 % when the illumination was 90 mins. The prepared magnetically separable defect TNTs nanocomposites have excellent adsorption properties, photocatalytic activity and magnetism, photocatalytic activity and magnetic properties, and can be separated and recovered by external magnetic field.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Zhang Tengfei,Zheng Peng,Gao Jiajian,Liu Xiaolong,Ji Yongjun,Tian Junbo,Zou Yang,Sun Zhiyi,Hu Qiao,Chen Guokang,Chen Wenxing,Liu Xi,Zhong Ziyi,Xu Guangwen,Zhu Tingyu,Su Fabing
Developing high-performance Pt-based catalysts with low Pt loading is crucial but challenging for CO oxidation at temperatures below 100 °C. Herein, we report a Pt-based catalyst with only a 0.15 wt% Pt loading, which consists of Pt–Ti intermetallic single-atom alloy (ISAA) and Pt nanoparticles (NP) co-supported on a defective TiO 2 support, achieving a record high turnover frequency of 11.59 s –1 at 80 °C and complete conversion of CO at 120 °C. This is because the coexistence of Pt–Ti ISAA and Pt NP significantly alleviates the competitive adsorption of CO and O 2 , enhancing the activation of O 2 . Furthermore, Pt single atom sites are stabilized by Pt–Ti ISAA, resulting in distortion of the TiO 2 lattice within Pt–Ti ISAA. This distortion activates the neighboring surface lattice oxygen, allowing for the simultaneous occurrence of the Mars-van Krevelen and Langmuir–Hinshelwood reaction paths at low temperatures.
研究领域:
催化
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化学工程
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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）