APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Dong Ma,Yanxiang Zhang,Mengchun Gao,Yanjun Xin,Juan Wu,Nan Bao
A composite of reduced graphene oxide (RGO) and InVO 4 nanofiber was successfully synthesized by an electrospinning technique. The as-collected fibers were calcined at 420 °C in air and then calcined at 550 °C in nitrogen gas to remove polyvinyl pyrrolidone (PVP), which could enable InVO 4 to crystallize and protect the RGO from oxidation. The InVO 4 in the composite illustrated a hollowed-out fibrous morphology and orthorhombic phase, and RGO nanosheets were nested in the InVO 4 nanofibers. The hybrid RGO could produce more hydroxyl groups and a higher oxygen vacancy density on the surface of RGO/InVO 4 composite. Compared with pure InVO 4 , the light absorption range of the as-prepared RGO/InVO 4 composite was expanded. In Rh B degradation, the RGO/InVO 4 hybrid nanofibers displayed a higher photocatalytic activity than pure InVO 4 nanofibers. The enhanced photocatalytic activity might be ascribed to the role of RGO as an electron transporter and acceptor in the composite, which could effectively inhibit the charge recombination and facilitate the charge transfer. The exported electron could attack an O 2 molecule to facilitate the generation of •O 2 − and •OH for the photodegradation process of Rh B.
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
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2018
·Vol. 2018
·期 9
·1080-1086
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IF 2.507
Qianhong Shen,Zengyu You,Yang Yu,Tian Qin,Yuxuan Su,Hui Wang,Chunchun Wu,Fang Zhang,Hui Yang
Graphical A new carbon quantum dots/porous InVO 4 (CQDs/p-InVO 4 ) composite with enhanced photocatalytic activity was fabricated by loading carbon quantum dots on the surface of porous InVO 4 microspheres by a facile reflux process. A new carbon quantum dots/porous InVO 4 (CQDs/p-InVO 4 ) microsphere composite was synthesized by a facile reflux method. The relationship of structure and property of CQDs/p-InVO 4 was studied in detail. The results show that the as-prepared composite samples maintain the porous structure of the p-InVO 4 microspheres, while CQDs are uniformly loaded on the surface of the p-InVO 4 microspheres with an intimate interface. With this unique structure, the as-obtained samples exhibit enhanced photocatalytic degradation ability towards Rhodamine B (RhB) under visible-light irradiation. The synergistic effect of more active sites, increased visible-light absorption, and high separation efficiency of photogenerated electron–hole pairs is believed to be the reason for the enhanced photocatalytic activity.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 6
·982-993
·
IF 3.474
Yadong Meng,Yuanzhi Hong,Changyou Huang,Weidong Shi
Novel Z-scheme InVO4/CdS heterojunction photocatalysts have been successfully synthesized for the first time via a microwave-assisted process, followed by a mild hydrothermal method. The crystal structures, morphologies and sizes, chemical compositions and optical properties of the prepared photocatalysts were characterized via X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), and photocurrent measurements. Results showed that the prepared InVO4/CdS heterojunctions were composed of about 15 nm InVO4 nanoparticles and 1.5 μm CdS microspheres, and all heterojunctions exhibited good photoabsorption in the visible light region. The photocatalytic activity of the obtained samples was carefully evaluated via the degradation of rhodamine B (RhB) and ciprofloxacin (CIP) under visible light irradiation (λ > 420 nm). Compared to that of bare InVO4 and CdS, the InVO4/CdS heterojunctions exhibited significantly enhanced photocatalytic activity for RhB and CIP degradation. Moreover, the 40 wt% InVO4-coupled CdS composite displayed the highest catalytic efficiency for RhB photodegradation, which is about 59.4 and 4.8 times higher than that of pure InVO4 and CdS, respectively. In addition, the active species trapping experiment and electron spin resonance (ESR) measurement demonstrated that h+ and ˙O2− radicals were the predominant active species in the photocatalytic reaction process. Furthermore, the possible enhanced photocatalytic mechanism of InVO4/CdS heterojunctions was also proposed based on the band position measurements and ESR analysis.
研究领域:
材料科学
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纳米技术
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环境化学
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光催化
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无机合成
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Yan Yan,Xinlin Liu,Weiqiang Fan,Peng Lv,Weidong Shi
New types of visible-light-driven semiconductor photocatalysts for the applications of environmental improvement and solar energy conversion have received much attention. In this study, a novel visible-light-driven InVO 4 photocatalyst was successfully synthesized by a facile additive-free hydrothermal method. The product is 3D spheric structure and well-crystallized. Pt loading plays a key role in this system. Pt nanocrystals on the particle surface not only act as charge collectors and transporters but also produce much more active sites. The Pt–InVO 4 photocatalyst exhibited excellent visible-light-driven photocatalytic activity that reach the ciprofloxacin (CIP) degradation ratio of 98.2% and H 2 production rate of 9.76 μmol h −1 g −1 with methanol as the sacrifice reagent.
研究领域:
材料科学
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环境科学
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太阳能转换
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiadong Li,Feng Wei,Ziyuan Xiu,Xiaojun Han
InVO 4 possesses great potential in photocatalytic CO 2 conversion. It is still highly desired to develop efficient strategies of photocatalyst fabrication to prevent its attenuated activity caused by the rapid recombination of photogenerated electron-hole. Herein, a direct Z-scheme heterojunction of Bi 2 WO 6 /InVO 4 nanosheets is constructed via two-step hydrothermal synthesis. The Bi 2 WO 6 /InVO 4 composite exhibits a superior photocatalytic performance toward CO 2 reduction into CO and CH 4 under visible light irradiation. The CO evolution rate reaches up to 17.97 μmol g −1 h −1 , while the CH 4 production rate is 1.13 μmol g −1 h −1 , which are higher than those catalyzed by bare InVO 4 and bare Bi 2 WO 6 . Based on the photoelectrochemical results, hydroxyl radical test, Scanning Kelvin Probe (SKP) and electron spin resonance (ESR) investigation, the enhanced activity of CO 2 reduction can be attributed to a Z-scheme electron transfer at the interface to promote spatial charge separation, which effectively preserves the reduction ability of photoelectron on the conduction band of InVO 4 for CO 2 conversion.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
·
IF 9.446
Zengyu You,Yuxuan Su,Yang Yu,Hui Wang,Tian Qin,Fang Zhang,Qianhong Shen,Hui Yang
A novel g-C 3 N 4 nanorod/InVO 4 hollow sphere composite was fabricated through a facile template-free method. The structure-property relationship was analyzed, and the formation mechanism of such structure and morphology was also proposed based on the observation from time-dependent morphology evolvement. The results show that InVO 4 hollow spheres uniformly load on the surface of g-C 3 N 4 nanorod and thus forming the heterojunction with an intimate interface. The bulk g-C 3 N 4 experiences a possible peeling process to form the rod-like structure, during which the mass ratio of InVO 4 and ultraphonic process play a key role. Moreover, bubble-template is believed to determine the formation of InVO 4 hollow sphere. Owing to this unique structure and morphology, the enhanced visible-light photocatalytic activities are achieved because of the synergistic effect of light harvesting, high transfer efficiency and enhanced separation efficiency of photo-generated carriers. And more importantly, this fabrication method combines heterojunction constructing with morphology controlling of g-C 3 N 4 in one step, and thus may supply a new idea for the preparation of other g-C 3 N 4 based composites.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Ming Yan,Yan Yan,Chao Wang,Wei Lu,Weidong Shi
In this letter, Ni 2+ doped InVO 4 nanocrystals were successfully synthesized by a simple one-pot microwave-assisted method. The energy bandgap of obtained samples can be precisely controlled by varying the Ni 2+ doping amount. The O 2 production rate of obtained Ni–InVO 4 nanocrystals is higher than that of pure InVO 4 nanocrystals under visible-light, which can be ascribed to the narrowed band gaps. The corresponding 1% doped sample N1 has the highest O 2 production rate (394 μmol/h) in all samples, which is 66% higher than the undoped sample N0.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Liying Sun,Xuesong He,Bin Liu,Shuming Zhang,Zheng Xiang,Xin Wang,Yang Wang
The development of materials with dual adsorption/photocatalytic functions for the removal of difficult-to-degrade organics is a very promising and challenging strategy. In this paper, a novel S-scheme heterojunction photocatalyst, InVO 4 /ZnIn 2 S 4 , was successfully synthesized with a unique hierarchical structure, which provides plenty of accessible adsorption/photocatalytic sites with a high light-harvesting rate (by multiple reflections). The experimental results show that optimized InVO 4 /ZnIn 2 S 4 (5-IV/ZIS) has superior removal performance, whose adsorption-photocatalytic synergistic removal of tetracycline (TET) can reach 69.31 % after 15 min and 90.69 % after 45 min. Based on the analysis of the mechanism, the excellent removal performance can be attributed to the adsorption of the target onto the material by hydrogen bonding, followed by the degradation of the adsorbed target by active substances ( h + > O 2 •− > e - > 1 O 2 > • OH) generated by the S-scheme heterojunction. In addition, the possible pathways for the photocatalytic removal of TET on 5-IV/ZIS were investigated by HPLC-MS analysis. T.E.S.T. and E. coli inhibition experiments demonstrated a significant reduction in the toxicity of TET after the photocatalytic reaction. In conclusion, the novel multifunctional photocatalyst 5-IV/ZIS prepared in this study can be used for the efficient treatment of organic compounds in wastewater with a bright application prospect.
研究领域:
环境科学
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材料科学
·
生物学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2013
·
IF 3.473
Yan Yan,Fanpeng Cai,Yang Song,Weidong Shi
The efficiency of visible-light-driven oxide semiconductor photocatalysts for hydrogen production from water splitting has long been restricted by the large particle size. In this study, a simple and versatile microwave-assisted synthesis of InVO 4 nanocrystal photocatalysts is proposed. The as-prepared products possess high crystallinity and ultra-small size (20 nm) that has never been reported yet. The 20 nm-sized nanocrystal samples show reduced visible-light response and enlarged reductive energy compared with large-sized InVO 4 samples. The hydrogen production rate of InVO 4 nanocrystal photocatalysts is 14.16 μmol h −1 g −1 which is higher than that of large-sized InVO 4 microspheres (9 μmol h −1 g −1 ). The model of size-dependent activities and the possible mechanism for the activity enhancement are also discussed by the band position calculation in this paper.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Zijin Wang,Jun Wang,Yining Pan,Fangyang Liu,Yanqing Lai,Jie Li,Liangxing Jiang
A novel magnetic InVO 4 /ZnFe 2 O 4 composite with the synergistic effect of adsorption and photocatalytic activity has been prepared using a hydrothermal method and characterized by a series of analytical techniques. The addition of ZnFe 2 O 4 not only improves the adsorption capability in the case of more active sites and positive zeta potential but also broadens the absorption range and promotes visible light harvesting. The optimum activity was found at a mole ratio of ZnFe 2 O 4 :InVO 4 = 3:1 (IZ-4). The removal rate for methylene blue (MB) under the synergistic effect of adsorption and photocatalytic reaches 88.74%, which is 6.87 times and 14.11 times that of the pure InVO 4 and ZnFe 2 O 4 , respectively. Furthermore, the adsorption kinetics and isotherm investigations indicate that the adsorption process followed the pseudo-second-order kinetic and Langmuir isotherm models. The maximum adsorption capacity of MB as 97.12 mg/g is achieved on the IZ-4 composite, which is better than the adsorbents reported previously. A type-II heterojunction between InVO 4 and ZnFe 2 O 4 based on the results of Mott-Schottky (M-S) plots is proposed to facilitate the charge transfer and improve the photocatalytic activity. In terms of the experimental results of N 2 adsorption/desorption, zeta potential and photoluminescence emission spectra, a possible mechanism of MB removal is discussed. The InVO 4 /ZnFe 2 O 4 composite with a synergistic effect of adsorption and photocatalytic degradation increases the active adsorption sites and promotes the separation of photogenerated electron and holes, thereby improving the MB removal performance.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 4
·1855-1862
·
IF 5.503
Jiawei Wang,Chenghe Hua,Xiaoli Dong,Yu Wang,Nan Zheng
In this study, metallic Bi deposited indium vanadate nanosheet (Bi/InVO4) photocatalysts were successfully fabricated by a two-step hydrothermal method. Multiple characterisation techniques were used to investigate the crystal structures, morphologies, and optical and electrical properties of Bi/InVO4. The photocatalytic performance of the as-prepared samples was evaluated via photocatalytic nitrogen fixation under mild conditions. The results show that 5% Bi/InVO4 exhibits the optimal photocatalytic performance, and the generation rate of NH3 is as high as 626 μmol g−1 h−1, which is 5.2 times higher than that of pure InVO4. The enhanced photocatalytic activity is caused by the surface plasmon resonance (SPR) endowed by metallic Bi which enhanced the light-harvesting and the effective separation and migration of charge carriers. Meanwhile, 5% Bi/InVO4 also demonstrates stability in multicycle N2 fixation. This study provides a new research strategy to synthesize high-performance catalysts for photocatalytic nitrogen fixation under mild conditions.
研究领域:
材料科学
·
纳米技术
·
催化
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 40
·14030-14045
·
IF 4.174
Kailian Zhang,Jie Guan,Ping Mu,Kai Yang,Yu Xie,Xiaoxiao Li,Laixi Zou,Weiya Huang,Changlin Yu,Wenxin Dai
To effectively enhance the utilization of clean sunlight energy, harvesting a large percentage of near infrared (NIR) light is significant. One of the commonly used effective methods for modifying semiconductors is by co-doping upconversion materials on semiconductors to heighten the photocatalytic efficiency. In this work, Yb3+/Tm3+ co-doped InVO4 nanosheets were synthesized by a facile hydrothermal path, and the crystal phases, morphologies, surface chemical compositions, as well as optical properties were characterized. Yb3+/Tm3+ co-doped InVO4 revealed significantly enhanced photoactivity towards chromium(VI) reduction and methyl orange oxidation under visible or NIR light irradiation. Furthermore, 5YT-IV presented the highest electrocatalytic performance and photocatalytic production of H2O2 under visible light irradiation, requiring low overpotential and low Tafel slope (390 mV dec−1) for hydrogen evolution reaction than that of the bare InVO4 (731 mV dec−1), and as well improved the yield of photocatalytic H2O2 production by about 3.5 times. This was primarily ascribed to intensive light absorption resulting from the benign upconversion energy transfer of Yb3+/Tm3+ and the boosted charge separation caused by the intermediate energy states. Moreover, the presence of h+ and ˙O2− as the main oxidative species played a significant role during the photocatalytic oxidation process of methyl orange and electrons played a decisive role in Cr(VI) reduction. This study provides a promising platform for efficiently utilizing the visible-NIR energy of sunlight in the field of photocatalytic H2O2 production and for alleviating environmental pollution in future.
研究领域:
材料科学
·
光催化
·
环境科学
·
能源转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）