JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 32
·15267-15275
·
IF 4.682
Huang Yong,Chen Feng,Meng Lingyao,Hu Yongming,Chen Wanping
Room temperature gas-sensitive metal oxides have received growing concern over their long-term stability in recent years. Presently, Pt-SnO 2 composite nanoceramics of 1 wt% Pt have been prepared, and the time dependence of their room temperature hydrogen sensing capability has been carefully studied. A strong variation with time was observed, with the room temperature response to 1% H 2− 20% O 2 –N2 decreased by a factor of several dozen after only one week. Heat treatments were found highly effective to activate those aged samples. Their room temperature hydrogen sensing capability was almost completely restored through 10 min heat treatments at temperatures as low as 130 °C. It is proposed that impurity gases in air slowly deposit on Pt in Pt–SnO 2 composite nanoceramics, and the catalytic role of Pt is deactivated by the deposition and then activated after their desorption through heat treatments. These results suggest that periodic mild heat treatments can be a simple and feasible way for some room temperature gas-sensitive metal oxides to maintain a high long-term stability.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hui Li,Haoyu Qi,Yi Zhuang,Chuanbo Zheng,Zhiteng Wang,Weitong Du,Sheng Xu,Huan Yao,Jin Zhu,Shiyi Yin
Despite the ideal specific theoretical capacity, SnO 2 -based electrode materials, considered potential anode materials , face challenges due to serious volume expansion and poor safety performance. In this study, we propose a novel approach called SnO 2 /Li 2 O–B 2 O 3 (SLB), where SnO 2 is cladded with a Li 2 O–B 2 O 3 interface construction. This glassy flexible matrix effectively fixes the active particles within the framework, curbing volume expansion, and facilitating high-efficiency ion transport. Additionally, the presence of the glassy interface construction converts the well-known irreversible conversion/inversion reaction into a reversible process, resulting in a significant enhancement of the coulombic efficiency. At a current density of 0.5 A g −1 , SLB demonstrates improved cycling stability with a capacity of 566.3 mAh g −1 after 300 cycles. Even at a higher current density of 1.0 A g −1 , the capacity remains at 363.4 mAh g −1 after 800 cycles. Moreover, the artificial protection layer, composed of the Li 2 O–B 2 O 3 /Sn interface construction matrix, greatly enhances the flame resistance of the electrode material at abnormally high temperatures, thanks to the excellent thermal stability of the flexible glassy matrix. This interface modification represents a promising approach to address the challenges and significantly advance the commercialization of SnO 2 -based anode materials.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Longjun Guo,Wei Liu,Chunqing Wang
Herein, a twistable and tailorable NH 3 sensor utilizing hollow porous Cu-doped SnO 2 @PANI (PCS) composite was assembled on a flexible non-woven fabric substrate by in-situ polymerization technique and its gas sensing performance was tested at room temperature (∼25 °C). The results indicated that the well-designed PCS sensor to 50 ppm NH 3 exhibited six times higher response (25.4) than the pristine PANI sensor (4.5). The PCS flexible sensor still possessed a response (1.53) for 10 ppb NH 3 , and the detection limit could reach 5.2 ppb for NH 3 . Meanwhile, the PCS flexible sensor demonstrated excellent flexibility with response decreases of only 1.97 % after 1000 times bending (120°), and 2.11 % after 100 times folding (150°) and long-term stability through 42 days of monitoring (maintaining 98.4 % response). Furthermore, the PCS sensor displayed insensitivity to relative humidity (20 % − 75 % RH), and the low sensing temperature could reach − 15 °C. The enhanced sensing performance of the PCS sensor was attributed to the synergistic effect of the vital role of abundant oxygen vacancy and − OH groups, as well as the hollow porous interconnected structure and the p-n heterojunction between Cu-doped SnO 2 and PANI. This work provides more opportunities to design smart wearable devices for detecting ppb-level NH 3 at room temperature.
研究领域:
材料科学
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化学传感
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纳米技术
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产品关联
DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 48
·e202303395
·
IF 2.1
Yanqing Wang,Yu Wu,Mengzhu Li,Zhaozhao Wang,Weizhi Zhang,Chengwu Shi,Peng Cui
Graphical Here, poly(acrylic acid) (PAA) is employed to modify the SnO 2 electron transport layer. Carboxyl groups can react with KOH in the commercial SnO 2 aqueous colloidal dispersion to produce potassium polyacrylate, the −COO − can combine not only with oxygen and Sn 4+ on SnO 2 , but also can chelate with uncoordinated Pb 2+ defects on perovskite. Moreover, carboxyl groups can form a chemical linker between SnO 2 and perovskite via the esterification reaction, leading to the reduction of surface hydroxyl group defects of SnO 2 .The optimal device displaying an enhanced efficiency and better stability. SnO 2 is one of the most used inorganic electron transport materials for organic-inorganic halide perovskite solar cells. However, the surface defects of SnO 2 will block the electron transport at the SnO 2 /perovskite buried interface and limit the device performance. Here, poly(acrylic acid) (PAA) is employed to modify the SnO 2 electron transport layer. Carboxyl groups can react with KOH in the commercial SnO 2 aqueous colloidal dispersion to produce potassium polyacrylate, the −COO − can combine not only with oxygen and Sn 4+ on SnO 2 , but also can chelate with uncoordinated Pb 2+ defects on perovskite. Moreover, carboxyl groups can form a chemical linker between SnO 2 and perovskite via the esterification reaction, leading to the reduction of surface hydroxyl group defects of SnO 2 . The optimal solar cells with PAA modification achieve an enhanced power conversion efficiency of 18.88 % and improved stability.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jing Zhou,Dan Meng,Tinghe Yang,Xintong Zhang,Zheqing Tang,Yu Cao,Jian Ni,Jianjun Zhang,Ziyang Hu,Jinbo Pang
The combination of the SnO 2 and Sb 2 Se 3 offers an alternative strategy for realizing the n-p heterojunction in Sb 2 Se 3 thin-film solar cells. However, the low conductivity of the SnO 2 and the lateral growth of Sb 2 Se 3 grains make carrier extraction more challenging, thereby resulting in unsatisfactory device performance. In this study, the improvement of the Sb 2 Se 3 solar cell performance is achieved by enhancing the conductivity of the SnO 2 and rearranging the Sb 2 Se 3 elongated grains simultaneously so that the carriers can be efficiently transmitted through the grain conduction mode instead of the grain boundary conduction mode. Furthermore, the evolution of (Sb 4 Se 6 ) n ribbons from pure lateral growth to longitudinal growth is observed by adjusting the distribution of doping elements on the SnO 2 surface. Finally, under optimal treatment times, the carrier recombination in the heterojunction is effectively inhibited by building an efficient electron-transport channel, and the Sb 2 Se 3 solar cell achieved the highest power conversion efficiency of 5.41%. Our study clarifies the relationship between carrier transport and grain orientation in one-dimensional Sb 2 Se 3 materials and realized the effective adjustment of the (Sb 4 Se 6 ) n ribbon growth direction. The outcomes of this study provide guidance for the control of carrier behavior in optoelectronic devices with similar one-dimensional absorber materials.
研究领域:
材料科学
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光伏技术
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半导体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Yidan Ding,Shasha Li,Yang Jiao,Liguo Shen,Hongjun Lin,Yanchao Xu
Inspired by the use of magnetism to shape material forms, this work presents a magnetism-driven approach to construct polyamide nanofiltration membranes with embedded magnetic Fe 3 O 4 –SnO 2 nanoparticles. A magnetic field is applied in the interfacial polymerization to attract magnetic nanoparticles from the aqueous phase to the water‒oil interface, forming a novel “template interface” that outlines the nanoparticles in the resulting membrane. This modification significantly enhanced the membrane performance, with a pure water flux of 27.2 L m −2 h −1 bar −1 , nearly quadrupling that of the TFC membrane, and 99.3 % Na 2 SO 4 rejection occurred resulting from reduced PA layer thickness, enlarged surface area, lower crosslinking degree, and enhanced surface hydrophilicity. Importantly, the incorporation of Fe 3 O 4 –SnO 2 nanoparticles endows the membrane with exceptional photocatalytic capabilities, which are crucial for degrading antibiotics adsorbed on the membrane surface and thereby restoring its separation performance. This approach regulates the morphology and performance of polyamide membranes, equipping them with advanced functionalities to address environmental pollution and water treatment challenges effectively.
研究领域:
材料科学
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环境工程
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膜技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Xian Xie,Wei Zhang,Yanzhuo Gou,Pan Deng,Kai Zhang,Shihao He,Jinhua Li,Sujuan Hu,Xianbao Wang,Liangyou Lin
The presence of strain can affect the performance of perovskite solar cells, but strain is often unavoidable in the preparation of perovskite solar cells (PSCs). Herein, 4,5-dichloroaniline-2-sulfonic acid (DCSA) served as a passivator to treat the SnO2 electron transport layer, which led to a reduction of trap states in the SnO2 film and enhanced the energy level alignment between the SnO2 and perovskite layer. The −Cl in DCSA effectively interacts with the uncoordinated Sn4+ that fills the oxygen vacancy sites on the surface of SnO2. Meanwhile, the −SO3H functional group in DCSA interacts with the uncoordinated Pb2+ in perovskite, thus retarding the nonradiative recombination process. These interactions eventually contribute to the decrease in lattice strain within the device. The optimized device achieved a champion power conversion efficiency of 23.32% and retained above 90% of its initial PCE value after 1032 h of storage under ambient conditions without encapsulation.
研究领域:
材料科学
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能源技术
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界面工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Xiaoxu Duan,Yuming Qian,Jiwei Wu,Liang Ma,Zhihuang Zhao,Liwang Wang,Lingyu Xiao,Shifan Zhang
The large amount of waste gas containing volatile organic compounds (VOCs) discharged from petrochemical sewage plants will cause air pollution and seriously endanger the safety of human beings and the ecological environment. In this paper, we proposed a photocatalytic oxidation degradation technique of VOCs and designed a photocatalytic reaction device loaded with TiO2/SnO2 catalyst. Under UV light irradiation, there is an energy level difference in the conduction band between TiO2 and SnO2, which makes the photogenerated electrons (e–) migrate to SnO2 and reduces the surface electron density of TiO2. Thus, the recombination of photogenerated electron–hole pairs (e––h+) is inhibited and the catalyst activity is improved. Meanwhile, the synergistic effect of the oxidation of hydroxyl radicals (·OH) and ozone greatly improves the conversion rate. In addition, in the industrial side line, by studying the influence of inlet gas volume, inlet gas concentration, and gas humidity (RH) on the conversion rate of the VOCs, we revealed the operation law of the photocatalytic technique in industrial applications. Under the best working conditions, the purification rate of the VOCs was as high as 92.73%. This technique can not only effectively avoid the damage to the environment caused by polluting VOCs but also promote the low-carbon and green development of enterprises in the industry.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Chong Xie,Shenghui Yang,Jianwen Shi,Beibei Li,Chen Gao,Chunming Niu
The stability of MnO x based low temperature SCR catalysts remained to be a serious issue. This report explored use of multi-walled carbon nanotubes (MWCNTs) network with uniform structure as a “rigid” pore template for synthesis of mesoporous MnO x -TiO 2 SCR catalyst with high surface area and high stability. The results showed that MWCNT network imposed MnO x -TiO 2 catalyst a mesoporous porosity with a narrow pore size distribution centered on ∼13.2 nm and a surface area of 131.6 m 2 g −1 stabilized at 500 °C. The mesoporous structure was formed by interconnected nanoparticles, comprised of crystallized rutile TiO 2 core surrounded by amorphous MnOx , with an average diameter of ∼8 nm. The catalyst exhibited an excellent low temperature SCR activity and selectivity as well as high resistance to deactivation and poison by H 2 O and SO 2 . SnO 2 modification led to degradation of catalytic performance in low temperature (60–180 °C) side, but improvement at high temperature side (240–360 °C), especially at high gas velocity, which can be attributed to change in structure, reactivity of MnO x and surface acidity induced by SnO 2 addition.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2020
·Vol. 6
·期 1
·2000566
·
IF 5.969
Jinyong Wang,Jun Zhang,Wenfeng Wang,Yanan Guo
The detection of ultralow NO 2 for practical applications remains a significant challenge because the two critical characteristics of high sensitivity and good robustness are considerably unsatisfactory. Inspired by the classification of stimuli-receiving and signal-conveying for a stimuli-responsive procedure of a neuron in organisms, an internal micro-Schottky junction introduced into a chemiresistor is constructed as an efficient transduction strategy to boost the less concerned transducing stage for a further improvement in NO 2 sensing performance. The SnO 2 nanoflowers/reduced graphene oxide-based chemiresistor achieves a response of 10.5 toward 10 ppt NO 2 , with a record-breaking limit of detection of 0.73 ppt at room temperature as well as fast response and recovery times of 59 and 9 s at 10 ppt. Surprisingly, the sensor exhibits good robustness, including higher selectivity, long-term stability, and process stability. A comprehensive analysis of the electrical properties and energy band of inorganic materials reveals that the ultrahigh sensitivity and faster response/recovery are primarily related to the efficient transducing ability arising from the rapid electron transport and signal-amplifying effect contributed by micro-Schottky junctions. The concept of affiliating the sensing material modulation to the recepting and transducing stages and considering comprehensively provides a novel insight into the enhancement of gas sensing performance.
研究领域:
材料科学
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传感技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Jinfei Hu,Hang Zhu,Min Lin,Duoer Wu,Jianguo Yao,Tianyu Sun,Xiangjuan Ma,Yijing Xia
The objective of this research is to develop an effective electrocatalytic filtration system using Ti/SnO 2 -Sb membrane anodes for eliminating Rhodamine B (RhB) from wasteater. Compared to Ti/SnO 2 -Sb plate anode, the prepared Ti/SnO 2 -Sb membrane anodes featured smaller particle size, bigger electrocatalytic active surface area, lower charge transfer resistance, and higher potential for oxygen evolution. The electrocatalytic filtration system obtained RhB removal of 90.29% with EE/O of 5.51 kWh m −3 after 90 min of electrolysis when initial pH value was 5, current density was 10 mA cm −2 , initial RhB concentration was 50 mg L −1 , and membrane flux was 2.17 m 3 (m 2 ·h) −1 , respectively. The flow-through electrocatalytic filtration system was found to be limited by kinetics under a high membrane flux and dominated by an indirect radical oxidation. Finally, the possible RhB degradation pathways were proposed based on the detected intermediates and density functional theory calculations.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2024
·Vol. 8
·期 20
·2400122
·
IF 6
Guoming Li,Zhu Ma,Tangjie Yu,Ningqiang Xuan,Zhangfeng Huang,Yanlin Li,Shanyue Hou,Qianyu Liu,Wei You,Yi Chen,Zhuowei Du,Junbo Yang,Qiang Yang,Li Tan,Cheng Huang,Yan Xiang,Yaohua Mai,Jian Yu,Wei Long
Element doping and interface modification strategy are effective methods to regulate the electrical properties of SnO 2 electron transport material, SnO 2 /perovskite (PVK) interface, and PVK crystal growth. Herein, rubidium fluoride (RbF) is introduced into SnO 2 colloidal dispersion, and then an ultra-thin layer of 4-carboxy-3-fluorobenzoboric acid (FBCA) is applied to the SnO 2 layer surface. This synergistic modification strategy can improve the electrical conductivity of the electron transport layer, increase the chemical connection of the buried interface, improve the crystallization and grain growth of PVK, and thus promote the performance and stability of devices. The results show that the PVK solar cells (PSCs) with the synergistic-modified SnO 2 electron transport material (M-SnO 2 ) obtain an optimum power conversion efficiency of 21.92% and the unencapsulated PSCs sustain 91% and 87% of the original value, which stored in a nitrogen atmosphere and ambient atmosphere (25 ± 5 °C, 30–50% relative humidity) more than 1000 h, respectively.
研究领域:
材料科学
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能源技术
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化学工程
✓ 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）