SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Zanyun Ying,Xinya Wang,Chengzhi Wu,Shihan Zhang
Photocatalytic NO degradation often suffers from sluggish charge carrier separation and low selectivity. Herein, a series of In 2 O 3 /TiO 2 (P25) composites were synthesized to enhance NO abatement. Benefiting from the conspicuous synergistic effect between In 2 O 3 and P25, the In 2 O 3 /P25 catalysts demonstrated more than double the NO elimination performance compared to pure P25 and In 2 O 3 . The In 2 O 3 /P25 sample with 75 wt% In 2 O 3 (In-P25-75) achieved a NO removal efficiency of 51.7 %, higher than reported catalysts (30.0–49.0 %). It was the successful formation of type-II heterostructure that enabled intimate interfacial contact and provided ample electron transfer channels. Moreover, photoluminescence spectra and photoelectrochemical measurement confirmed the improved separation and inhibited recombination of photogenerated charge carriers in In-P25-75, thereby boosting the NO photocatalytic efficiency. ·O 2 − and ·OH radicals generated by photoinduced electron transfer to the conduction band of P25, along with the induced holes confined to the valence band of In 2 O 3 , facilitated the targeted deep oxidation of trace NO into NO 3 − rather than harmful NO 2 . This work discloses a promising strategy for the efficient removal of NO from the atmosphere by reducing the emission of hazardous intermediate NO 2 .
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
·
IF 6.3
Peng Xiang,Congming Tang,Kai Ma,Xinli Li
Solar-driven interfacial evaporation for sustainable production of clean water from seawater and organic wastewater is viewed as a cutting-edge and practical technology to solve the shortage of fresh water. Here, we provide a novel strategy for constructing oxygen vacancy-rich In 2 O 3 /TiO 2 composite to apply in water purification . It is found that oxygen vacancy enhances light absorbance, reduces light reflection, and decreases the thermal conductivity , being beneficial for photothermal conversion and heat confinement. On the other hand, oxygen vacancy-rich In 2 O 3 /TiO 2 composite offers an excellent photocatalytic degradation, which can improve the quality of the purified water and keep surface and interface clean, and thus enhance durability of photothermal material. To compare with In 2 O 3 /TiO 2 , In 2 O 3 /TiO 2 * with rich oxygen vacancies markedly enhances the evaporation rate of pure water from 1.04 to 1.51 kg m −2 h −1 under 1 sun illumination , corresponding photothermal conversion efficiencies of 58.6% and 90.3%, respectively. Furthermore, the evaporator constructed with In 2 O 3 -TiO 2 * displayed 1.47 and 1.49 kg m −2 h −1 for seawater and lake water , respectively, close to pure water under 1 sun illumination. Besides, this evaporator also offered an excellent purification and photocatalytic degradation for organic wastewater during the solar-driven evaporation. Importantly, this evaporator also could synergistically generate electricity, achieving a maximum electrical power of 1.23 W m −2 under 1 sun. This work demonstrates the preponderance of the oxygen vacancy-rich material, and expands the application of the defected In 2 O 3 /TiO 2 composite in solar-driven interfacial evaporation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Molecular Catalysis
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2025
·
IF 4.9
Hui Kang,Quan Shao,Luming Li,Yanlin Zhang,Xin Xiao,Yuefeng Liu
The gas-inducing strategy has proven highly effective in constructing high-density oxide interfaces. In this study, we utilized CO 2 hydrogenation reaction to induce the spontaneous dispersion of In 2 O 3 species on the surface of TiO 2 , forming numerous InO x /TiO 2 interfaces. The 2 %In 2 O 3 /TiO 2 catalyst demonstrated a 33-fold enhancement in reverse water-gas shift reaction (RWGS) performance after dispersion. Multi-technique characterization revealed that H 2 in the reactants reduced In 2 O 3 to partially reduced states (In +(3-x) ), which were more prone to migration. The spontaneous dispersion was not solely driven by the strong interaction (anchoring) ability of the support for In 2 O 3 species. Further mechanistic studies showed that the high-density InO x /TiO 2 interface formed via spontaneous dispersion significantly promoted the formation of formate species during CO 2 hydrogenation, which decomposed into CO at lower temperatures (297 °C), thereby improving catalytic performance. This work highlights the potential of atmosphere-induced structural evolution in catalysis, underscoring the importance of a comprehensive analysis of the activation, migration, and anchoring mechanisms, as well as the catalytic promotion principles of the induced structure.
研究领域:
催化化学
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材料科学
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表面科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Alamgir,Raza Ullah,Khalid Talha,Hongye Yang,Nouraiz Mushtaq,Abrar Ahmad,Linkun Fan,Lan Li,Guixia Zhao,Xusheng Wang,Junkuo Gao
It is challenging to engineer a photocatalyst that can degrade antibiotics efficiently. We have successfully developed a series of photocatalysts by annealing In-MOF (BUT-205) with TiO 2 , namely (a) In 2 O 3 /TiO 2 -I, (b) In 2 O 3 /TiO 2 -II, and (c) In 2 O 3 /TiO 2 -III. These catalysts, particularly In 2 O 3 /TiO 2 -III, exhibited superior efficiency in degrading tetracycline (TC) under visible light. The enhanced photocatalytic performance of In 2 O 3 /TiO 2 -III can be attributed to the formed S-scheme heterojunction, which promoting the separation of electron-hole pairs. The S-scheme heterojunction was confirmed by XPS , in-situ XPS, UV–vis diffuse reflectance spectroscopy, and Mott-Schottky plot, etc. Compared to pure TiO 2 and In 2 O 3 , the In 2 O 3 /TiO 2 -III demonstrated an 18-fold and 3-fold higher degradation rate constant (k). Various factors affecting the degradation of TC were investigated, including pollutant concentration, catalyst type, solution pH, catalyst dosage, inorganic anions , inorganic cations , and radical species. Photoluminescence (PL) and transient photocurrent density evaluate the separation rate of electron-hole pairs, and EPR experiments (active species trapping) studies confirmed •O 2 − and h + as the primary entities in TC photodegradation by In 2 O 3 /TiO 2 -III. HPLC/MS analysis revealed the photocatalytic degradation pathway. The MOF-derived photocatalysts efficiency in TC photoreduction results from the formed S-scheme heterojunction, making it a promising candidate for environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2025
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IF 2.5
Li Lingyu,Ma Qian,Zhao Dongheng,Zhang Huayushuo,Li Bolong
Recently, the development of an n-pentane-sensing product has always been plagued by the lack of suitable inorganic material with good gas-sensing response and selectivity at low operating temperatures. In this work, Ti-MIL-125-induced one-dimensional tubular In 2 O 3 /TiO 2 heterostructures have been fabricated by a facile electrospinning method and a subsequent heat-treatment process. Obvious morphological evolution from a fibrous to a tubular shape with the presence of In 2 O 3 -TiO 2 heterojunctions can be adjusted by varying the added amount of the Ti-ML-125 component. Compared with pure In 2 O 3 , the optimal In 2 O 3 /TiO 2 composites exhibit a blue-shifted energy band (2.52 eV) and an increased specific surface area (227.70 m 2 /g), as well as the enhanced gas-sensing performance on various concentrations of n-pentane. For example, In 2 O 3 /TiO 2 -3% can not only display excellent long-term stability and humidity stability but also has a high response of 670–100 ppm n-pentanol at 50°C, much larger than that of pure In 2 O 3 (50) at 150°C. Significantly, In 2 O 3 /TiO 2 -3% can still reach the high response of 197–100 ppm n-pentanol at room temperature. According to density functional theory (DFT) calculations, the enhanced gas-sensing mechanism is mainly attributed to the combination of the distinctly increased surface active sites through the regulation of morphology and the introduction of effective In 2 O 3 -TiO 2 heterojunctions, which can be beneficial to improving the surface adsorption/desorption characteristics and the electron transport between n-pentanol and the sensing material interface. Graphical
研究领域:
材料科学
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传感器技术
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2019
·Vol. 54
·期 14
·10191-10203
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IF 3.442
Yu Han,Chen Fenghua,Ye Li,Zhou Heng,Zhao Tong
Ion co-doped photocatalysts with In 2 O 3 /TiO 2 heterostructure (In 2 O 3 /TiO 2 (m)) were prepared through a new polymeric precursor method. The In 2 O 3 /TiO 2 (m) precursor solution is of salient advantage in coating photocatalysts on various substrates and multiple modifications. The photocatalysts were facilely obtained after the calcination of precursors. Mass ratio of In/Ti was optimized according to their photocatalytic performances, and IT(m)-3 ( w In/Ti = 3%, modified by N, B co-doping) showed the best photocatalytic activity. The band gap was successfully narrowed to 2.37 eV, and In 2 O 3 /TiO 2 heterostructure was successfully constructed in the photocatalysts. Visible light absorption and separation of photoexcited carriers were significantly enhanced. Under visible light, NOX (20 mg/L in the water) was 100% photodegraded in 10 min, with 100% TOC removed in 25 min. The IT(m)-3-loaded quartz fabrics (ITQ) also showed excellent photocatalytic performance. The photocatalytic activity of ITQ was repeatable and stable in 45 rounds of recycle without centrifugation. Synergetic effect of heterostructure and element doping was considered contributing to the outstanding photocatalysis performance. The polymeric precursor method proposed in this work showed great potential in large-scale preparation and application of immobilized photocatalysts. The synergetic improvement through co-modifications showed its proper compatibility with modifications.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
WATER AIR AND SOIL POLLUTION
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2025
·Vol. 236
·期 13
·1-19
·
IF 3
Zhang Xia,Zhou Mengqin,Wan Xiu,Liu Xi,Hao Shixiong,Cheng Chunru,Xiao Zhongming,Wang Yongfan
To address the challenges of titanium dioxide's low utilization of visible light, easy recombination of photogenerated charges, and insufficient interfacial contact when integrated with other semiconductors to form heterojunctions, a novel, simple, and easy hybrid MOF template-directed method was developed to enhance the interaction between oxide and support, thereby constructing In 2 O 3 @TiO 2 - x (IT- x ) composites with tightly contacted heterojunction interfaces. After 120 minutes of exposure to visible light, the IT-30% realized a 91.98% degradation rate for tetracycline in wastewater with an initial concentration of 30 mg/L, which is 1.46, 3.39, and 2.07 times higher than that of bare TiO 2 , bare In 2 O 3 , and Degussa-P25, respectively. After 5 cycles (10 h), the IT-30% photocatalyst still maintained high photocatalytic activity with a 14.47% decline in tetracycline degradation efficiency. The experiments on free radical trapping and electromagnetic spin resonance (ESR) revealed that the superoxide radical is the primary active substance in the tetracycline photocatalytic degradation. SEM, HRTEM, and XRD characterization techniques were utilized to demonstrate the successful preparation of hollow composites. The results of BET, UV-Vis DRS, XPS, photoluminescence (PL), and electrochemical impedance spectroscopy (EIS) indicate that the high photocatalytic activity of the prepared IT-30% composite is ascribed to its large specific surface area, strong capacity for visible light absorption, generate abundant oxygen vacancies generated in the composites, and efficient separation and migration of photogenerated carriers. In addition, a possible degradation pathway for tetracycline was proposed according to the HPLC-MS test results of intermediate products.
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