ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2023
·
IF 6.8
Wei Liu,Jin Zhang,Qun Kang,Hongbing Chen,Ru Feng
Environmental pollution by organic pollutants poses a great threat to the ecosystem and human development. Solar-powered catalytic oxidation technology can solve the existing energy and pollution crisis. Hence, in this work, cubic nano-In 2 O 3 modified g-C 3 N 4 composite was synthesized by in situ calcination, then it was coupled with hydrogen peroxide for the degradation of antibiotic under visible light. The results of SEM and XPS showed that In 2 O 3 and g-C 3 N 4 were closely combined. The catalytic oxidation efficiency of the antibiotic doxycycline was greatly improved when the as-prepared compound was coupled with hydrogen peroxide, and 88.2% of doxycycline was degraded within 80 min. By designing the active species inhibition test, it was found that a large number of hydroxyl radicals were generated in the system after adding hydrogen peroxide, which accelerated the degradation of the target. Hydrogen peroxide not only acts as a source of hydroxyl radical, but also as an active electron acceptor, which promotes the separation of photogenerated electron-hole pairs in the composite photocatalyst. Therefore, the double oxidation system formed by In 2 O 3 /g-C 3 N 4 coupled with hydrogen peroxide can degrade the target at a higher rate. This work provided a research basis for the synthesis of In 2 O 3 with regular morphology and simplified synthesis of In 2 O 3 /g-C 3 N 4 , and explored the practicability of the coupling method of double advanced oxidation for pollutant degradation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 4
·1517
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IF 3.4
Deqi Zhang,Shenghui Guo,Jiyun Gao,Li Yang,Ye Zhu,Yanjia Ma,Ming Hou
In this paper, with the help of the method of composite materials science, parallel synthesis and high-throughput screening were used to prepare gas sensors with different molar ratios of rare earths and precious metals modified In2O3, which could be used to monitor and warn the early leakage of gasoline and diesel. Through high-throughput screening, it is found that the effect of rare earth metal modification on gas sensitivity improvement is better than other metals, especially 0.5 mol% Gd modified In2O3(Gd0.5In) gas sensor has a high response to 100 ppm gasoline (Ra/Rg= 6.1) and diesel (Ra/Rg= 5) volatiles at 250 °C. Compared with the existing literature, the sensor has low detection concentration and suitable stability. This is mainly due to the alteration of surface chemisorption oxygen caused by the catalysis and modification of rare earth itself.Keywords:high-throughput screening;surface modification;In2O3;gas sensor;fuel volatiles
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
ACS Catalysis
·
2024
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IF 11.3
Wenhang Wang,Kaixuan Huo,Yang Wang,Jinghao Xie,Xu Sun,Yingluo He,Meng Li,Jie Liang,Xinhua Gao,Guohui Yang,Simin Lin,Fengliang Cao,Hu Jiang,Mingbo Wu,Noritatsu Tsubaki
Oxygen vacancies (Ov) in reducible metal oxides are the vital active sites for methanol synthesis via a CO2 hydrogenation technology. However, the relationship between the density of Ov and the methanol synthesis performance is still ambiguous, and it still shows a lack of a versatile strategy to precisely tailor the number of Ov. In this study, with In2O3 as a representatively catalytic component, the density functional theory computation confirms that the Ov property, especially Ov density, is pivotal to enhancing methanol selectivity of CO2 hydrogenation by suppressing the undesirable reverse water–gas shift reaction for CO formation, which is attributed to the unique electronic density of In atoms around Ov. To verify the theoretical results, we report a protocol to optimize the concentration of Ov on In2O3 by sequential carbonization and oxidation (SCO) treatments of In-based metal–organic frameworks, during which the consumption of carbon species and the structural reconstruction of the In2O3 crystal regulated the particle size and Ov concentration of In2O3 by varying the oxidation temperature. The In2O3-5 catalyst carbonized and oxidized at 500 °C exhibits good methanol selectivity (72.3%) at a CO2 conversion of 9.9% under 330 °C, 3 MPa, and high space velocity of 12,000 L–1 kgcat–1 h–1. Multiple in situ characterizations clarify that the proposed Ov property regulating the SCO strategy is convenient to boost methanol synthesis by altering the CO2 hydrogenation process to the HCOO* intermediate-dominated pathway. Our work provides the catalyst design strategy and will shed light on the rational design of reducible metal oxide-based catalysts with a controllable Ov density.
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
Journal of Materials Chemistry C
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2019
·Vol. 7
·期 24
·7219-7229
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IF 6.641
Xiaole Zhang,Dalei Song,Qi Liu,Rongrong Chen,Jindi Hou,Jingyuan Liu,Hongsen Zhang,Jing Yu,Peili Liu,Jun Wang
The reasonable design of semiconductor metal oxides modified by elemental doping and surface functionalization has been proven to be an effective method to improve the gas sensing abilities of chemiresistor-type sensors. In this work, Ni-doped In2O3 nanorods were fabricated via simple oil bath and annealing processes. To further enhance their gas sensing performances, Ag functionalization was carried out by a subsequent chemical reduction process. The experimental results reveal that these composites exhibit excellent formaldehyde sensing performance compared with pure In2O3 nanorods. In particular, 6%-Ag/Ni5.0In presents significantly enhanced gas sensing performance toward 100 ppm formaldehyde gas at a low working temperature (160 °C) with high sensitivity (123.97), fast response speed (1.45 s/58.2 s), and good selectivity and stability. Our research reveals that the improvement in sensing performance toward formaldehyde can be attributed to the large specific surface area, high relative contents of OV and OC components, electronic sensitization and the catalytic effect of Ag. The results provide an effective strategy to achieve excellent gas sensing performance for formaldehyde gas sensors.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Dongqing Liu,Xinyu Bai,Jing Sun,Danyang Zhao,Chenghui Hong,Nengqin Jia
Based on hollow In 2 O 3 /In 2 S 3 material, an innovative molecularly imprinted photoelectrochemical (PEC) sensor was developed for sensitive detection of glutathione (GSH). Using nicotinamide as a functional monomer , the GSH template molecule was imprinted on hollow In 2 O 3 /In 2 S 3 material with a large specific surface area, which has better selectivity to GSH. The cavernous structure of the material facilitates the enhanced absorption of visible light due to light scattering and reflection. The heterojunction structure between In 2 O 3 and In 2 S 3 also promotes the rapid separation of electron-hole pairs, which significantly enhance the photocurrent response. The constructed sensor exhibits the detection range from 1 μmol L −1 to100 μmol L −1 with a detection limit of 0.82 μmol L −1 (S/N = 3). Meanwhile, the PEC sensor has excellent stability and selectivity, which provides an innovative idea for the actual detection of GSH.
研究领域:
分析化学
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材料科学
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生物医学工程
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产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2022
·
IF 4.644
Jian Fang,Zhi-Hong Ma,Jing-Jing Xue,Xi Chen,Rong-Pu Xiao,Ji-Ming Song
Precious metals doping can greatly change the gas sensing performance of semiconductor metal oxide . Herein, the Au-doped In 2 O 3 nanoparticles (NPs) were prepared via a combination solvothermal and liquid-phase reduction method, and the obtained nanoparticles were characterized by various techniques. The results indicated that Au nanocrystals with a diameter ca. 5 nm were uniformly distributed on the surface of the irregular In 2 O 3 NPs. Importantly, compared with undoped In 2 O 3 , the specific surface area of all the Au-doped In 2 O 3 NPs increased. And all the Au-doped In 2 O 3 sensors greatly improved the gas sensing performance towards ethanol. The optimal operating temperature reduced from 240 °C for undoped In 2 O 3 to 200 °C for Au-doped In 2 O 3 . Of them, the 4 wt% Au-doped In 2 O 3 sensor displayed highly response (106 towards ethanol at 100 ppm) at the optimal operating temperature, good linear coefficient, high reproducibility, and long-term stability towards ethanol. Moreover, through the detection of seven gases including ethanol, such as methanol, acetone , benzene, formaldehyde, isopropanol, and nitrogen dioxide， we found that the fabricated sensor based on 4 wt% Au-doped In 2 O 3 had good selectivity towards ethanol. Finally, the mechanism of the excellent performance of the 4 wt% Au-doped In 2 O 3 sensor for ethanol was explained.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Jinyu Huang,Jianwei Li,Zhonglei Zhang,Junda Li,Xiangdong Cao,Jihua Tang,Xuejin Li,Youfu Geng,Jiaqi Wang,Yu Du,Yatao Yang,Xiaofang Pan
Detecting trace ppb-level of formaldehyde (HCHO) in indoor ambient and human exhaled breath using metal oxide semiconductor (MOS) gas sensor has attracted increasing attention. Herein, Ag nanoparticles (Ag NP) modified In 2 O 3 and Au nanocage (Au NC) modified In 2 O 3 as well as bimetal Ag NP and Au NC co-modified In 2 O 3 were successfully prepared via one-step microwave-assisted solvothermal method and were used to construct semiconductor gas sensor. It is exciting to observe that the sensor based on Ag 6 Au 1 /In 2 O 3 exhibits the highest response of 277 toward 5 ppm HCHO at low operating temperature (170 °C), which is about 7 times, 38 times and 102 times higher than 6 wt. % Ag/In 2 O 3 , 1 wt. % Au/In 2 O 3 and pristine In 2 O 3 , respectively. Moreover, the selectivity and detection limit (down to 26 ppb) of Ag 6 Au 1 /In 2 O 3 sensor to HCHO have been proven to be greatly improved. This excellent sensing performance indicates that the proposed bimetal Ag and Au co-modification with synergistic catalysis effect offers an effective design for highly sensitive and efficient HCHO detection devices. Moreover, the mechanism of HCHO sensing with Au and Ag co-loaded In 2 O 3 was explored by the calculations obtained from first-principle density functional theory studies .
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of CO2 Utilization
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2018
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IF 5.503
Jianyang Wang,Anfeng Zhang,Xiao Jiang,Chunshan Song,Xinwen Guo
Although many researchers have reported CO 2 hydrogenation to various C1 chemicals, it is still challenging to directly and selectively convert CO 2 to C 2 -C 4 hydrocarbons in terms of overcoming the extreme inertness of CO 2 and a high C C coupling barrier. In the present work, we report an efficient integration of methanol-synthesis and the methanol-to-hydrocarbons with the bifunctional catalyst component of In 2 O 3 -ZrO 2 and SAPO-5. These tandem reactions exhibit an excellent relative selectivity of C 2 -C 4 (83%) with a suppressed CH 4 relative selectivity less than 3% at T = 300 °C. A detailed analysis indicates that the partially reduced indium oxide surface (In 2 O 3 -ZrO 2 ) can better activate CO 2 and promote the synthesis of methanol than In 2 O 3 alone, and C C coupling is subsequently manipulated within the confined acidic pores of SAPO-5 according to XRD, H 2 -TPR, CO 2 -TPD, SEM and TEM. Furthermore, the proximity of two components and the content of Si also play an important role in such outstanding selectivity to C 2 -C 4 . Our study paves a new path for the direct synthesis of lower hydrocarbons.
研究领域:
化学工程
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催化化学
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能源化学
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产品关联
DOI
高影响因子
Nanoscale Research Letters
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2019
·Vol. 14
·期 1
·1-11
·
IF 3.159
Zhou Shiqiang,Chen Mingpeng,Lu Qingjie,Zhang Yumin,Zhang Jin,Li Bo,Wei Haitang,Hu Jicu,Wang Huapeng,Liu Qingju
Formaldehyde (HCHO) is the main source of indoor air pollutant. HCHO sensors are therefore of paramount importance for timely detection in daily life. However, existing sensors do not meet the stringent performance targets, while deactivation due to sensing detection at room temperature, for example, at extremely low concentration of formaldehyde (especially lower than 0.08 ppm), is a widely unsolved problem. Herein, we present the Ag nanoparticles (Ag NPs) sensitized dispersed In 2 O 3 nanograin via a low-fabrication-cost hydrothermal strategy, where the Ag NPs reduces the apparent activation energy for HCHO transporting into and out of the In 2 O 3 nanoparticles, while low concentrations detection at low working temperature is realized. The pristine In 2 O 3 exhibits a sluggish response (R a /R g = 4.14 to 10 ppm) with incomplete recovery to HCHO gas. After Ag functionalization, the 5%Ag-In 2 O 3 sensor shows a dramatically enhanced response (135) with a short response time (102 s) and recovery time (157 s) to 1 ppm HCHO gas at 30 °C, which benefits from the Ag NPs that electronically and chemically sensitize the crystal In 2 O 3 nanograin, greatly enhancing the selectivity and sensitivity.
研究领域:
材料科学
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环境科学
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传感器技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qi Zhao,Zihan Liu,Ziyue Xu,Bowen Li,Siqi Yang
The real-time and effective detection of n-butanol gas is particularly important in production and daily life due to its flammability, toxicity, and potential hazards to the environment. This article reports the preparation of hollow indium oxide spheres and rGO/In 2 O 3 composites through a simple hydrothermal and subsequent heat treatment method. Test results indicate that the gas sensitivity of n-butanol can be significantly improved through rGO composites. The prepared hollow indium oxide spheres are composed of nanosheets with a diameter of probably 500 nm. After combination by rGO, the specific surface area and the proportion of adsorbed oxygen of the material are increased, both of which are advantageous for enhancing gas sensitivity abilities. At the optimum operating temperature of 160 °C, the response value of rGO/In 2 O 3 complex sensor is 51–50 ppm of n-butanol, which is 3.6 times the response of pure In 2 O 3 . Gas sensors composed of rGO/In 2 O 3 exhibit ultra-fast response time and low detection limit. Even for ppb grade (100 ppb) n-butanol gas, the response value is still 2.3. These characteristics make rGO/In 2 O 3 a promising material for the preparation of high-performance n-butanol gas sensors. Besides, the gas-sensitive mechanism of the enhanced n-butanol sensing performances is also analyzed.
研究领域:
材料科学
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传感器技术
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环境监测
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
·
IF 5.816
Ying Wang,Jiaru Peng,Yangfan Xu,Hongcun Bai,Ruiyang Zhao,Jishu Han,Lei Wang
Novel Cd 0.67 Mo 0.33 Se/In 2 O 3 hollow nanotubes were prepared for photocatalytic hydrogen production application. Under visible light irradiation , Cd 0.67 Mo 0.33 Se/In 2 O 3 hollow nanotubes showed enhanced photocatalytic performance. And the apparent quantum efficiency of 34.86% was obtained when irradiated with 420 nm monochromatic light. The modification of Cd 0.67 Mo 0.33 Se QDs on the surface of In 2 O 3 hollow nanotubes effectively improved the utilization rate of light absorption, increased the separation and migration rate of electrons, inhibited the recombination of photo-generated electron and hole pairs, thus enhancing the photocatalytic activity of water splitting to produce hydrogen . It would be an efficient photocatalyst for hydrogen production application in future.
研究领域:
材料科学
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能源科学
·
光催化技术
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Guolin Zhang,Qi Xu,Hui Huang,Fei Zhou,Liangyun Yu,Qi Chen,Jiarong Yang,Yanli Xiao,Qi Zhang
The extensive use of fossil fuels has resulted in large amounts of carbon dioxide being emitted into the air and has led to a number of environmental problems. Given the abundance of both carbon dioxide and sunlight in the earth’s atmosphere, converting solar energy into chemical energy by photothermally catalyzing carbon dioxide hydrogenation to produce methanol is a potential strategy. By using the coprecipitation approach, a Ni-doped In2O3 catalyst was created, and its compositional valence, morphology, specific surface area, band gap, and other properties were assessed by XRD, XPS, TEM, BET, H2-TPR, CO2-TPD, and UV–vis characterization. Methanol production from carbon dioxide hydrogenation is stable and effective under lower pressure (1 MPa) photothermal settings, with an efficiency of 63.4 gMeOHh–1kgcat–1, which is approximately 120% higher than that of pure In2O3 under the same circumstances.
研究领域:
环境科学
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催化化学
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能源科学
✓ 已验证
DOI
高影响因子
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