NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 6
·3140-3150
·
IF 3.925
Xingrui Qi,Zhidong Zhao,Nian Li,Zijian He,Yufang Chen,Tao Jin
At present, water resources contaminated by pathogenic microorganisms have an increasingly serious impact on human health. Photocatalytic sterilization using solar energy is an inexpensive and effective method. However, how to effectively utilize solar energy and improve the photocatalytic performance of catalysts is the main problem at present. In this work, urchin-like WO3−x and Cu-doped WO3−x were synthesized by a simple method. The synthesized photocatalysts were characterized in detail, and the sterilization performance of the catalysts was investigated under simulated sunlight. The sterilization rates of WO3−x against Escherichia coli and Staphylococcus aureus were 65.74% and 94.73%, respectively, while the sterilization rates of WO3−x doped with Cu against these two bacteria were 99.95% and 99.24%, respectively. Cu–WO3−x shows excellent photocatalytic bactericidal performance, which is attributed to the enhanced oxygen vacancies of WO3−x and the separation of photogenerated electron–hole pairs by the doping of Cu. This work is expected to provide an effective way to develop solar photocatalytic sterilization.
研究领域:
环境科学
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材料科学
·
微生物学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 3
·1-11
·
IF 5.3
Liu Huamin,Li Chenghong,Wang Lina,Fang Lichao,Huang Hui,Deng Jun,Hu Yue,Li Mimi,Ran Xiaoping,Li Lulu,Zheng Junsong
A “signal-off” photoelectrochemical (PEC) sensing platform has been designed for the ultrasensitive detection of DNA methylation levels and multiple methylated sites. The platform employs tungsten trioxide and TpPa-1-COF loaded by gold nanoparticle (AuNPs@WO 3 @TpPa-1-COF) composite material as the photoactive component and p-type reduced graphene (rGO) as an efficient quencher. The PEC signal of AuNPs@WO 3 @TpPa-1-COF composite is effectively quenched in the presence of p-type rGO, because p-type rGO can compete with AuNPs@WO 3 @TpPa-1-COF to deplete light energy and electron donors. In addition, a hybrid strand reaction (HCR) amplification strategy fixes more target DNA and then combines with rGO-modified anti-5-methylcytosine antibody to facilitate ultrasensitive DNA methylation detection. Under optimal conditions, DNA methylation can be measured within a linear concentration range of 10 –14 to 10 –8 M, with an exceptionally low detection limit of 0.19 fM (S/N = 3). At the same time, the platform can conduct quantitative determination of multi-site methylation, with the linear equation △I = 44.19Log A + 61.43, and the maximum number of methylation sites is 5. The sensor demonstrates high sensitivity, excellent selectivity, and satisfactory stability. Furthermore, the proposed signal-off PEC strategy was successfully employed to detect DNA methylation in spiked human serum samples, with recoveries ranging from 93.17 to 107.28% and relative standard deviation (RSD) ranging from 1.15 to 5.49%. Graphical
研究领域:
生物化学
·
分析化学
·
材料科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 5
·3036-3043
·
IF 11.301
Yating Wang,Chaosheng Peng,Tao Jiang,Jing Zhang,Zheng Jiang,Xingang Li
To improve solar light harvesting and charge separation efficiency, we develop a facile strategy for synthesizing defect-engineered three-dimensionally ordered macroporous (3DOM) WO3 photonic crystals via the colloidal crystal template method and subsequent H2/N2 atmosphere thermal treatment. The oxygen evolution rate of the obtained defect-engineered 3DOM WO3 (W270–400) is 40.1 μmol h−1, which is much higher than that of the untreated 3DOM WO3 and the defect-engineered WO3 nanoparticles. The enhanced performance is due to the good light harvesting and excellent charge transportion properties. The results show that the slow photon effect and bulk oxygen vacancy (VO) induced narrowed band gap greatly improve the light harvesting efficiency, while abundant surface VO can lower the valence band to increase the driving force for water oxidation, and thus significantly promote electron–hole separation. Our work can guide further design and preparation of high-efficiency defect-engineered 3DOM semiconductors for solar energy conversion.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Jinguo Wang,Zimei Chen,Guangjun Zhai,Yong Men
Developing metal oxides with tailored surface oxygen vacancies is very important for heterogeneous photocatalysis. In this work, uniform WO 3 nanorods with tailored surface oxygen vacancies were prepared by a facile hydrothermal route, which exhibited highly enhanced photocatalytic activity for selective oxidation of alcohols to corresponding ketones in water medium. The physicochemical structural properties of uniform WO 3 nanorods have been characterized and correlated with their photocatalytic activities. Results indicated that the enhanced photocatalytic activity of uniform WO 3 nanorods was ascribed to the synergistic effect of the following three aspects: firstly, the high surface area favored the adsorption and diffusion of alcohol molecules; secondly, the small crystallite size shortened the transfer distance of photoelectrons and thus facilitated the fast transfer of photoelectrons, thereby restrained the recombination rate of photoelectron-hole pairs; finally, the surface oxygen vacancies acted as the photoelectron sinks could capture photoelectrons and promote their separation from holes. Meanwhile, the uniform WO 3 nanorods also demonstrated good stability owning to its stable crystal phase and robust morphological structure.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2016
·
IF 1.34
Ya-hui YANG,Ren-rui XIE,Hang LI,Can-jun LIU,Wen-hua LIU,Fa-qi ZHAN
A novel WO 3– x /TiO 2 film as photoanode was synthesized for photoelectrocatalytic (PEC) reduction of CO 2 into formic acid (HCOOH). The films prepared by doctor blade method were characterized with X-ray diffractometer (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The existence of oxygen vacancies in the WO 3– x was confirmed with an X-ray photoelectron spectroscopy (XPS), and the accurate oxygen index was determined by a modified potentiometric titrimetry method. After 3 h of photoelectrocatalytic reduction, the formic acid yield of the WO 3– x /TiO 2 film is 872 nmol/cm 2 , which is 1.83 times that of the WO 3 /TiO 2 film. The results of PEC performance demonstrate that the introduction of WO 3– x nanoparticles can improve the charge transfer performance so as to enhance the performance of PEC reduction of CO 2 into formic acid.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Energy
·
2021
·Vol. 15
·期 3
·678-686
·
IF 2.709
Xu Zehong,Zhu Qiaohong,Xi Xinguo,Xing Mingyang,Zhang Jinlong
Photocatalytic water splitting for hydrogen (H 2 ) generation is a potential strategy to solve the problem of energy crisis and environmental deterioration. However, powder-like photocatalysts are difficult to recycle, and the agglomeration of particles would affect the photocatalytic activity. Herein, a direct Z-scheme CdS/WO 3 composite photocatalyst was fabricated based on carbon cloth through a two-step process. With the support of carbon cloth, photocatalysts tend to grow uniformly for further applications. The experimental results showed that the H 2 yield of adding one piece of CdS/WO 3 composite material was 17.28 μmol/h, which was 5.5 times as compared to that of pure CdS-loaded carbon cloth material. A cycle experiment was conducted to verify the stability of the as-prepared material and the result demonstrated that the H 2 generation performance of CdS/WO 3 decreased slightly after 3 cycles. This work provides new ideas for the development of recyclable photocatalysts and has a positive significance for practical applications.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Zhanzhi Ge,Yuesong Shen,Sasa Gu
The catalyst for selective catalytic reduction of NO x at high temperatures is significantly demanded by current gas-fired exhaust purification. In this work, the complex oxides composed of two different structures of ZrO 2 -WO 3 and WO 3 /ZrO 2 with zirconium as the main component were prepared for NH 3 -SCR of NO at high temperatures by blending method and equal volume impregnation method, respectively. Combined with XRD, NH 3 -TPD, FE-SEM, BET and in situ DRIFTS characterization, the effects of component optimization of two kinds of ZrO 2 and WO 3 complex oxides on the performance for NH 3 -SCR of NO were mainly studied. The optimal compatibility of ZrO 2 and WO 3 complex oxides was determined, and the corresponding N 2 selectivity and anti-interference ability of water vapor and SO 2 were further investigated. Results showed that the performance of ZrO 2 -WO 3 prepared by blending method for NH 3 -SCR of NO was significantly better than that of WO 3 /ZrO 2 prepared by impregnation method. The ZrO 2 -WO 3 containing 20% WO 3 has the best performance in NH 3 -SCR of NO with NO conversion higher than 90% and N 2 selectivity higher than 90% at 450–650 °C, and the performance was not affected by SO 2 , slightly affected by competitive adsorption of water vapor at 450 °C and not disturbed by water vapor above 500 °C. Further investigation showed that the NH 3 -SCR of NO over the ZrO 2 -WO 3 reaction followed both L-H and E-R mechanisms. Characterization analysis revealed that ZrO 2 -WO 3 has finer microscopic particles, larger specific surface area, higher acid amount and stronger acid strength than WO 3 /ZrO 2 .
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Haiding Zhong,Zhiao Han,Jinde Ling,Genglu Li,Yinyu Chen,Zhen Wang,Changhong Wang,De Li,Xiaoyu Wang
The development of electrochromic materials with high optical modulation and good cycling stability is a key focus in dual-band electrochromism. Hydrated tungsten oxide exhibits dynamic and independent control over the near-infrared and visible transmittance within the solar spectrum, garnering widespread attention in electrochromic applications. However, its optical modulation and cycling stability need further enhancement due to limited ion diffusion kinetics. Herein, a simple photo-deposition method is developed for synthesizing mesoporous WO 3 ·H 2 O films, characterized by high porosity and large surface area, which facilitates ion and electron transport within the films. Experimental results show that mesoporous WO 3 ·H 2 O can achieve three functional modes under different voltages: “bright”, “cold”, and “dark”. Compared to WO 3 ·H 2 O nanoplates, mesoporous WO 3 ·H 2 O electrode enables a superior dual-band electrochromic performance, including high optical modulation (74.1 % at 700 nm and 65.9 % at 1150 nm), rapid response times (13.5 s for coloring and 11.5 s for bleaching), high coloring efficiencies (138.9 cm 2 /C), and excellent cycling stability (optical modulation retention rate of 88.2 % after 1000 cycles). This research provides a novel approach to enhancing dual-band electrochromic performance through the incorporation of mesoporosity in materials.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 5
·1-11
·
IF 5.7
Shen Yuru,Sun Chenglong,Chen Mingjian,Du Yun,Cheng Jun,Li Yunlong,Xie Qingji
A new BiVO 4 -carboxylated graphene (cG)-WO 3 Z-scheme heterojunction was constructed on a fluorine-doped tin oxide (FTO) substrate electrode by ultrasonic mixing and cast-coating for determination of oxytetracycline (OTC). Since cG can absorb visible light and well match with the energy levels of WO 3 and BiVO 4 to promote the charge separation and transfer, the photocurrent on the BiVO 4 -cG-WO 3 /FTO photoelectrode is 4.4 times that on the control BiVO 4 -WO 3 /FTO photoelectrode. An amino-functionalized OTC aptamer was fixed on the BiVO 4 -cG-WO 3 /FTO photoelectrode by the 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxysuccinimide mediated amide reaction, and then hexaammonium ruthenium(III) (Ru(NH 3 ) 6 3+ ) was attached to the OTC aptamer to increase the photocurrent response to the OTC binding. Under the optimized conditions, the photocurrent on the BiVO 4 -cG-WO 3 /FTO photoelectrode at 0 V vs SCE was linear with the common logarithm of OTC concentration from 0.01 nM to 500 nM, with a limit of detection of 3.1 pM ( S / N = 3). Satisfactory recovery results were obtained in the analysis of real water samples. Graphical abstract
研究领域:
分析化学
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环境科学
·
生物传感技术
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DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2018
·
IF 3.849
He Yang,Weiqi Wei,Shubin Wu,Junping Zhuang
During the upgrading into biorefinery factories, the traditional pulp and paper mills urgently need to broaden the applications of pulp to achieve higher economic benefits. The conversion of pulp into high value-added bulk chemicals is considered as a potential approach. The pulp was previously treated by HCl and spray drying to decrease its particle size to 71.4 μm as the catalytic raw material. Mesoporous WO 3 with the specific surface area of 58.6 m 2 /g was then synthesized via KIT-6 silica template and it shown high performance in catalytic conversion of pretreated pulp into ethylene glycol. The feedstock conversion was 100% and the yield of ethylene glycol was 62.7% under the optimum condition. In comparison tests, the pretreated pulp and mesoporous WO 3 both displayed better catalytic performance than untreated pulp and nano-sized WO 3 without porous structure. However, the catalytic performance of mesoporous WO 3 decreased in recycling test and the reasons were analyzed preliminarily. This work demonstrated that the ordered mesoporous WO 3 was a high-performance catalyst and had potential for producing ethylene glycol in good cooperation with acid pretreated pulp.
研究领域:
化学工程
·
生物质转化
·
催化材料
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2016
·Vol. 31
·期 8
·1065-1076
·
IF 1.579
Zhenguang Shen,Zengying Zhao,Jingwen Qian,Zhijian Peng,Xiuli Fu
Tungsten oxide (WO3−x) nanomaterials with controlled morphology and composition were fabricated by thermal evaporation of WO3 and S powders at different temperatures in a vacuum tube furnace. At 850 °C the obtained green particle is still of the same monoclinic WO3 phase as that of the starting powder. At a temperature between 900 and 1100 °C, the resultant dark-blue products are particle-like clusters composed of numerous monoclinic WO2.90 short nanorods, but the clusters became looser and the nanorods grew somewhat longer as the temperature increased. At a temperature between 1150 and 1250 °C, elongated and thoroughly separate purple-red monoclinic W18O49 nanorods were obtained. The growth of the prepared WO3−x nanomaterials was controlled by a gas–solid mechanism. Their photocatalytic degradation on organic contaminants was evaluated by decomposing methylene blue (MB) in aqueous phase under sunlight, in which WO3 particles presented higher photocatalytic activity than its oxygen-deficient counterparts, WO2.90 and W18O49. But the W18O49 nanorods had higher adsorption ability to MB in all the samples.
研究领域:
材料科学
·
纳米技术
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2019
·Vol. 9
·期 2
·187
·
IF 3.444
Pingfan Xu,Siyi Huang,Minghua Liu,Yuancai Lv,Zhonghui Wang,Jinlin Long,Wei Zhang,Haojun Fan
Semiconductor photocatalysis has received much attention as a promising technique to solve energy crisis and environmental pollution. This work demonstrated the rational design of “sandwich” WO3/rGO/SnIn4S8(WGS) Z-scheme photocatalysts for efficient purification of wastewater emitted from tannery and dyeing industries. Such materials were prepared by a combined protocol of the in situ precipitation method with hydrothermal synthesis, and structurally characterized by XRD, SEM, HRTEM, UV-vis DRS, and PL spectroscopy. Results showed that the Z-schemed nanohybrids significantly enhanced the photocatalytic activity compared to the single component photocatalysts. An optimized case of the WGS-2.5% photocatalysts exhibited the highest Cr(VI) reduction rate, which was ca. 1.8 and 12 times more than those of pure SnIn4S8(SIS) and WO3, respectively. Moreover, the molecular mechanism of the enhanced photocatalysis was clearly revealed by the radical-trapping control experiments and electron paramagnetic resonance (ESR) spectroscopy. The amount of superoxide and hydroxyl radicals as the major reactive oxygen species performing the redox catalysis was enhanced significantly on the Z-scheme WGS photocatalysts, where the spatial separation of photoinduced electron–hole pairs was therefore accelerated for the reduction of Cr(VI) and degradation of Rhodamine B (RhB). This study provides a novel strategy for the synthesis of all-solid-state Z-scheme photocatalysts for environmental remediation.Keywords:WO3/rGO/SnIn4S8;Z-scheme photocatalyst;active oxygen species;photocatalytic Cr (VI) reduction;rGO
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
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