JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lifang Yang,Jiangju Si,Liang Liang,Yunfei Wang,Li Zhu,Zizhong Zhang
Photocatalytic water splitting has been identified as a promising solution to tackle the current environmental and energy crisis in the world. However, the challenge of this green technology is the inefficient separation and utilization of photogenerated electron-hole pairs in photocatalysts. To overcome this challenge in one system, a ternary ZnO/Zn 3 In 2 S 6 /Pt material was prepared as a photocatalyst using a stepwise hydrothermal process and in-situ photoreduction deposition. The integrated S-scheme/Schottky heterojunction in the constructed ZnO/Zn 3 In 2 S 6 /Pt photocatalyst enabled it to exhibit efficient photoexcited charge separation/transfer. The evolved H 2 reached up to 3.5 mmol g -1 h - 1 . Meanwhile, the ternary composite possessed a high cyclic stability against photo-corrosion under irradiation. Practically, the ZnO/Zn 3 In 2 S 6 /Pt photocatalyst also showed great potential for H 2 evolution while simultaneously degrading organic contaminants like bisphenol A. It is hoped in this work that the incorporation of Schottky junctions and S-scheme heterostructures in the construction of photocatalysts would lead to accelerated electron transfer and high photoinduced electron-hole pair separation, respectively, to synergistically enhance the performance of photocatalysts.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Sijia Wu,Qian Wang,Jun Du,Lejin Zhu,Fujun Yang,Jiacheng Lu,Xueyu Li,Yuhao Li,Jingtao Cui,Yuqing Miao
Sonodynamic therapy (SDT) represents a promising, noninvasive, and precise treatment modality for tumors, demonstrating significant potential in clinical applications. However, the efficiency of sonosensitizers in generating reactive oxygen species (ROS) is often limited by rapid electron-hole recombination. In this study, BiF 3 @BiOI is synthesized via a co-precipitation method, followed by in-situ reduction to decorate it with Pt nanoparticles, resulting in BiF 3 @BiOI@Pt-PVP (BBP) nanocomposite for enhancing SDT efficacy. The formation of the BiF 3 @BiOI heterojunction enhances charge separation ability. The decoration of Pt nanoparticles narrows the bandgap and alters the band positions and Fermi level of BBP, which can effectively mitigate the rapid recombination of electron-hole pairs and facilitate a cascade reaction of ROS, thereby improving ROS generation efficiency with ultrasound excitation. Additionally, bismuth ions in BBP and the generated holes consume glutathione, exacerbating cellular oxidative damage, and triggering PANoptosis and ferroptosis. Furthermore, Pt nanoparticles demonstrate peroxidase-like activity, catalyzing endogenous hydrogen peroxide to oxygen. These functions are helpful against tumors for alleviating hypoxic conditions, reshaping the microenvironment, modulating immune cell infiltration capacity, and enhancing the efficacy of immunotherapy. The dual strategy of forming heterojunctions and sensitization with noble metals effectively enhances the efficacy of sono-catalytic therapy-induced immune activation in tumor treatment.
研究领域:
肿瘤学
·
生物材料学
·
免疫学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Zhenshuai Wu,Shuai Wang,Daowei Gao,Riming Hu,Xuchuan Jiang,Guozhu Chen
Supported catalysts are widely used in selective hydrogenation of nitroarenes, in which the choice of support has an important effect on the catalytic reaction rate and the selectivity of products. Herein, CePO 4 as support to stabilize Pt nanoparticles for selective hydrogenation of nitroarenes is presented. The catalyst achieves a remarkable selectivity of aromatic amine production (>95 %) with a high turnover frequency (1476 h −1 ). Mechanistic studies reveals that the electronic structure of Pt is modulated by CePO 4 . In comparison to conventional CeO 2 /Pt catalyst, the Pt sites on CePO 4 are negatively charged. Such configuration allows facile dissociation of H 2 on Pt sites. Meanwhile, the potential-determining step (the formation of Ph-HNOH from Ph-HNO) on CePO 4 /Pt (0.73 eV) is a significantly lower than CeO 2 /Pt (1.15 eV), thereby favoring the pathway for aromatic amine production on Pt sites. Moreover, the CePO 4 support has strong adsorption capacity of substrate, which plays a role as new active sites when adsorbed substrates are activated by active hydrogen species via hydrogen spillover. This work provides a new perspective into the development of selective nitroarenes conversion through the artful design of supported catalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xueqian Zhao,Weiqiang Zhou,Liming Xu,Danqin Li,Zian Huang,Mingming Zhang,Yize Li,Xiaojing Hao,Jingkun Xu
MoO 3 with Pt-like d-band center electronic structure is an ideal catalyst carrier, but its low conductivity, wide-bandgap and poor photoresponse limits the application of photoelectrocatalysis. Designing doping and oxygen vacancies simultaneously in MoO 3 is a candidate strategy to address some challenges. Herein, a 2D oxygen-vacancies Ce-MoO 3 /Pt (OVs-Ce-MoO 3 /Pt) nanosheet is developed using a two-step method of hydrothermal and chemical reduction. The band gap, optical properties, and methanol adsorption capacity of MoO 3 are well regulated after Ce doping and oxygen vacancy introduction. Profiting by the synergistic promotion of sufficient oxygen vacancies and Ce element, the OVs-Ce-MoO 3 /Pt catalyst exhibits super-efficient photoelectrocatalytic activity (2858 mA mg −1 ) and poisoning-tolerance ability towards methanol oxidation, which is superior to the Ovs-MoO 3 /Pt catalyst (1542 mA mg −1 ) and commercial JM Pt/C catalyst (377 mA mg −1 ). These results indicate that the OVs-Ce-MoO 3 /Pt catalyst can serve as a highly promising catalyst in the field of photoelectrocatalysis.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Mengnan Li,Huiyue Xin,Tongyang Song,Chen Zhao,Peng Wu,Xiaohong Li
Pt/Co 0.5 Fe 0.5 Al 2 O 4 catalysts with the average Pt particle size of 1.6–3.4 nm were prepared and applied to the selective hydrogenation of cinnamaldehyde (CAL). Not only the TOF was promoted from 0.19 to 2.70 s −1 , but also the selectivity to cinnamyl alcohol (COL) was improved from 68% to 94%, with the increase of Pt particle size. Stronger interaction occurred between Co 0.5 Fe 0.5 Al 2 O 4 and smaller-sized Pt particles, resulting in electron-deficient Pt particles, so that C O and C C bond could be activated simultaneously. However, electron-rich Pt species existed on Pt/Co 0.5 Fe 0.5 Al 2 O 4 with larger Pt size, which is beneficial for the preferential activation of C O bond.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Caixia Miao,Meng Liu,Shengdong Tan,Guikai Zhang,Shengqi Chu,Shaojia Song,Qiyang Zhang,Jiaju Yu,Guiyuan Jiang,Weiyu Song,Qian He,Wenhao Luo,Zhijie Wu
Zeolite-tailored bimetallic Pt-Sn catalysts have been shown to be effective for propane dehydrogenation (PDH). Here, we have successfully prepared and compared two Sn-Beta-supported bimetallic PtSn catalysts (Pt/Sn-Beta (DG) and Pt/Sn-Beta (DA)), in which the Sn-Beta zeolite was prepared by a dry-gel (DG) synthesis method involving in situ Sn incorporation or a post-synthesis method involving dealumination and Sn incorporation (DA), respectively. The as-prepared Pt/Sn-Beta (DG), possessing a less fraction of extra-framework Sn species comparing to Pt/Sn-Beta (DA), shows a superior performance in terms of activity (TOF, 1.8 s -1 ), selectivity (99.0%) and stability (7360 min) at 550 °C using 40 kPa propane and 60 kPa nitrogen gas, reflecting one of the highest PDH performances for bimetallic Pt-Sn catalysts under similar conditions. By a combination of the state-of-the-art electron microscopy-based techniques and advanced spectroscopy techniques , we found that the proper Pt-Sn nano-alloying in Pt/Sn-Beta (DG), rather than Sn coverage on Pt species in Pt/Sn-Beta (DA) owing to the migration of excess extraframework Sn species, is essential for providing an enhanced PDH performance, as the active Pt species could be well isolated, accessed and stablized in Pt/Sn-Beta (DG) by alloying.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2024
·
IF 2.9
Zijie Su,Zhihua Zhao,Guixin Jin,Wei Chen,Xiaoqing Shen,Lan Wu
The focus of this work is to develop a sensitive and reliable acetone gas sensor using the Pt-modified Co 3 O 4 /CoMoO 4 heterojunction derived from metal-organic frameworks (MOFs). Pt-loaded Co 3 O 4 /CoMoO 4 heterojunction was successfully prepared by the surface redox method, and the composites exhibited high sensitivity and selectivity for acetone with a low detection limit. By modifying the Co 3 O 4 /CoMoO 4 material with platinum loading, the sensor achieved a response of 24.12 to 20 ppm acetone, which was significantly better than that of the pure Co 3 O 4 /CoMoO 4 heterojunction. This work not only improves acetone detection strategies, but also enhances the potential for industrial and medical VOC monitoring applications.
研究领域:
材料科学
·
传感技术
·
医学检测
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2020
·
IF 5.825
Juan Liu,Wen-Ying Li,Jie Feng,Xiang Gao
The improvement of the sulfur tolerance over Pt catalyst is critical for the hydrotreatment of crude oil. Fe was co‒impregnation with Pt on γ-Al 2 O 3 at different calcination temperature. Results revealed that adding Fe significantly facilitated the reduction of Pt oxides for the catalyst calcined at 400 °C. The morphological analysis and CO chemisorption showed Fe improved the dispersion of Pt nanoparticles. The surface chemical state analysis implied the co‒existence of the electron‒deficient Pt and metallic Fe. However, the increase of calcination temperature caused a decreased reducibility of Pt oxides due to strong metal support interaction. A higher dibenzothiophene hydrodesulfurization conversion of 97.7 % with a dominant biphenyl selectivity of 96.7 % were acquired for the catalysts incorporated with Fe. The density functional theory calculations confirmed the alloyed Fe led to the formation of electron‒deficient Pt atoms, and the higher affinity to sulfur made Fe be a favorable additive for noble metal catalyst in the hydrodesulfurization.
研究领域:
催化
·
化工
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yuliang Shi,Jing Li,Qiuling Wang,Shuiliang Yao,Zuliang Wu,Erhao Gao,Wei Wang,Jiali Zhu,Licheng Li,Nanhua Wu
The elimination of light alkanes has been the subject of extensive research. Rational tuning of the surface electronic structure of catalysts can optimize the adsorption and activation behavior of reactant molecules. Therefore, the role of metal-support interactions in plasma catalysis deserves in-depth investigation. In this study, a simple strategy was employed to synthesize Pt-based catalysts loaded on Ce-based binary oxide supports. The interactions between Pt noble metal and supports were regulated by varying the metal element type of the supports and the ratio of the support metal elements. Among them, 0.3 %Pt/CeMn 0.2 O x catalyst was the most effective for the synergistic plasma degradation of propane. Various characterizations showed that the redox ability and Pt species dispersion of 0.3 %Pt/CeMn 0.2 O x catalyst were significantly enhanced by strong metal-support interactions. It induced more Pt 0 and Ce 3+ on the surface for the activation of oxygen or water vapor to generate surface reactive oxygen species. Moreover, the plasma in turn facilitated the electron transfer of Pt/CeMn 0.2 O x catalyst and enhanced the metal-support interactions. The reactive oxygen species generated by plasma participated in the oxidation of propane and the oxygen cycle of Pt/CeMn 0.2 O x catalyst, thus enhancing the synergistic catalysis. The present work provides insight into the design of catalysts with high plasma catalytic synergy.
研究领域:
催化
·
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 31
·期 1
·677-683
·
IF 2.195
Wang Jing,Shen Bowen,Zhu Kongjun,Qiu Jinhao
With the ever increasing requirements for the structural health monitoring systems, the deposition of the piezoelectric films on the metallic or structural materials has turned out to be an important issue. Pb(Mg, Nb)O 3 -PbTiO 3 films with different buffer layers, i.e., in situ NiO, pre-fabricated NiO and LaNiO 3 , were successfully deposited on the Ni foil via the chemical solution deposition. The crystal structures and electric performances showed evident dependence on the buffer layer. Pre-deposited NiO and LaNiO 3 efficiently prevented the diffusion and complex reactions occurring at the interface, offered abundant nucleation sites, and thus helped the formation of pure high-qualified perovskite PMN-PT films at higher annealing temperatures.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 43
·20777-20785
·
IF 3.925
Yanke Yu,Mengqiao Geng,Desheng Wei,Chi He
Selective catalytic oxidation of NH3 (NH3-SCO) is a promising method to reduce NH3 pollution. The Pt-based catalysts exhibited excellent activity in the NH3-SCO reaction under low temperatures. However, it was easy for the NH3 to be oxidized to N2O and NOx (NO and NO2) over the Pt-based catalyst, causing a low N2 selectivity. The CuSO4, which could supply both Brønsted and Lewis acid sites on the catalyst, was used to promote N2 selectivity. The N2 adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), inductively coupled plasma mass spectrometry (ICP-MS), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), NH3-temperature programmed desorption (NH3-TPD), H2-temperature programmed reduction (H2-TPR) and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) were used to characterize the catalyst. The addition of CuSO4 could suppress the formation of N2O and NOx, thus the highest N2 selectivity on the catalyst increased from 21.2% to 78.1%. An imide mechanism was the main reaction mechanism on the Pt/TiO2 catalyst. After adding CuSO4, the NH3-SCO reaction over the CuSO4-Pt/TiO2 catalyst mainly followed an i-SCR mechanism where NH3 was oxidized to N2O and NOx, and then the newly formed N2O and NOx were reacted with NH3/NH4+ adsorbed on the Lewis and Brønsted acid sites via an NH3-SCR reaction over the catalyst, and finally N2 was formed. The acid sites performed an important role in the formation of N2 and this work should provide an effective method to promote N2 selectivity in a NH3-SCO reaction.
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE COMBUSTION INSTITUTE
·
2022
·
IF 6.535
Xing Yuan,Chaohe Zheng,Zuwei Xu,Qinghua Yang,Tiantian Zhang,Xi Luo,Haibo Zhao
Photothermocatalytic oxidation is an environmentally-friendly, low-temperature, and high-efficient method to remove the air pollutant. Yet, the lack of active, inexpensive, and superior stability catalysts has greatly limited its extensive utilization. In this work, the effect of single-atom Pt loading on TiO 2 support has been theoretically and experimentally studied to improve photothermocatalytic performance for the toluene combustion through flame spray pyrolysis (FSP). Pt loading can play two crucial roles into TiO 2 optimization: (1) The low-valence Pt cation incorporated into TiO 2 lattice is dramatically responsible for the anatase-rutile transformation (ART) and formation of sufficient oxygen vacancies ; (2) Introducing the defect energy level and Pt-3d orbitals remarkably promote the charge separation efficiency of single-atom catalysts. Moreover, the existence of single-atom Pt nanoparticles can signally boost the activity of surface adsorbed and lattice oxygen, as well as substantially reduce the oxygen vacancy formation energy. Thus, the toluene removal under light irradiation reaches 90% conversion below 160 °C and is maximally 18 °C lower than that under only thermocatalytic oxidation. It is attributed to larger specific surface area (SSA), outstanding low-temperature reducibility, extremely dispersed hybrid PtO x , more surface active oxygen, and higher mobility of bulk oxygen. Interestingly, when the oxygen-fuel equivalent ratio φ distinctly increases by shifting precursor solvent from xylene to ethanol, the photothermocatalytic property of toluene can be remarkably enhanced on single-atom Pt catalysts. It is due to the higher Pt dispersion resulting from more intense burning and drastic turbulent mixing, as well as the superior ratio of the metallic Pt active sites originating from higher flame temperature. Eventually, the rate-determining step of C 7 H 8 combustion on Pt/TiO 2 and Cu/TiO 2 slab are all the C C bond fracture of maleic anhydride to form acetic anhydride species, with the energy barriers of 112.03 and 188.74 kJ/mol, respectively.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
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