SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Jiajia Cai,Lingna Kong,Xiangxuan Tang,Jianmin Wang,Zhihong Xie,Xianxuan Wang,Qian Xie,Qiyan Xu
Hematite (α-Fe 2 O 3 ) is one of the most promising candidates as a photoanode for photocathodic protection (PCP) of 304SS. However, serious charge recombination has hindered the application. In this work, we verified the feasibility of constructing heterojunction for enhancing the PCP performance. α-Fe 2 O 3 @Bi 2 S 3 can not only broaden the solar light absorption region but also provide a built-in electric field to improve charge separation and close junctions for charge transport. When α-Fe 2 O 3 @Bi 2 S 3 was coupled with 304SS, the OCP under illumination negatively shifted to −0.788 V Ag/AgCl , which was ca . 600 mV negative than the corrosion potential of 304SS. The photoinduced current density reached 32 μA cm −2 , outperforming the bare Bi 2 S 3 and α-Fe 2 O 3 . The formation of a type II heterojunction between Bi 2 S 3 and α-Fe 2 O 3 was proposed and verified by the electrochemical impedance measurements.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Progress in Natural Science-Materials International
·
2024
·
IF 4.8
Shijia Liu,Haibin Wang,Xi Wang,Jieshu Zhou,Hongyan Liang
Electroreduction of CO 2 for formic acid production has been regarded as an efficient option for CO 2 utilization. However, under high current, achieving high selectivity for formic acid is challenging, which cannot meet industrial demands. Herein, we reported a type of Bi/In(OH) 3 (BIO) heterojunction reconstructed from Bi 2 S 3 /In(OH) 3 during electrochemical process, in which In(OH) 3 was applied to modulate the electronic structure of Bi. This strategy efficiently enhanced the ∗OCHO intermediates adsorption and lead to a decent selectivity towards formic acid under high current density. BIO displays faraday efficiency of formic acid beyond 95 % across a wide range current density of 200–400 mA cm −2 , where the highest value reached 97.7 % at 400 mA cm −2 . This work clarified the mechanism of CO 2 electroreduction to HCOOH on heterojunction, guiding the design of advanced catalysts.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Chemical Reactor Engineering
·
2025
·
IF 1.4
Huan Xi,Lu Wang,Haimeng Huang
Antibiotics in water body pose a threat to the ecosystem and human health, and the removal of antibiotics in water is imperative. Ti 3 C 2 T
x
has high specific surface area and structural stability, but suffers from low catalytic activity and insufficient utilization of active sites. In this paper, Ti 3 C 2 T
x
/Bi 2 S 3 composites (named PTB and STB, respectively) were prepared by in situ synthesis and physical composite method. The introduction of Bi 2 S 3 extends the light absorption of the composites to the visible region. Meanwhile, the electron migration resistance in PTB is smaller and the photoresponse current is larger. PTB exhibited better adsorption-photocatalytic performance than STB and pure Ti 3 C 2 T
x
, with a removal efficiency of 89 %. In addition, the study investigated the effects of water quality parameters and proposed a possible photocatalytic mechanism. Finally, the tetracycline adsorption and photocatalytic performance of PTB in real water samples showed good results, especially in lake water and tap water.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Chenyang Zhang,Wanni Wang,Mengli Zhao,Jun Zhang,Zhengbao Zha,Sheng Cheng,Haiwu Zheng,Haisheng Qian
Rational design of photocatalysts with heterostructure is of scientific and technological interest for taking full advantage use of solar energy. Here we demonstrate a facile method to fabricate Zn 0.5 Cd 0.5 S/Bi 2 S 3 composite nanospheres , in which Bi 2 S 3 nanorods grown on the surface of Zn 0.5 Cd 0.5 S nanospheres. The as-prepared Zn 0.5 Cd 0.5 S@ZnS core-shell nanospheres play a vital role in formation of the Zn 0.5 Cd 0.5 S@Bi 2 S 3 composite nanospheres. The Zn 0.5 Cd 0.5 S/Bi 2 S 3 composites show both excellent photocatalysis and photothermal effect. Nanorods-like Bi 2 S 3 show wide optical absorption from visible to near infrared light and photocurrent response, which enable enhanced full spectrum absorption of the heterostructured photocatalyst and photocurrent for overall photocatalytic performance. Additionally, Bi 2 S 3 nanorods with photothermal effect would synergistically increase the temperature of the micro-environment around the catalysts of Zn x Cd 1−x S. Thus, the Zn 0.5 Cd 0.5 S/Bi 2 S 3 composites exhibit a little better photocatalytic activity than that of pure Zn 0.5 Cd 0.5 S. The present study provides a promising strategy for the rational design of efficient sulfide semiconductor heterojunction catalysts for making the utmost of solar fuels in dealing with organic pollutants from wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 28
·4158-4168
·
IF 3.382
Dongfang Hou,Fan Tang,Bingbing Ma,Min Deng,Xiu-qing Qiao,Yun-Lin Liu,Dong-Sheng Li
Optimally engineered heterojunctions are of great interest to pursue higher photocatalytic activity in a wide range of applications. A series of controlled Bi4O5I2/Bi2S3 heterojunctions have been fabricated through a solvothermal method combined with an anion exchange process. The in situ growth of Bi2S3 nanorods from Bi4O5I2 flowers reveals that there exist strong coupling and intimate interfaces between the two semiconductors. The Bi4O5I2/Bi2S3 heterojunctions exhibit excellent photocatalytic activities and stability in the photocatalytic reduction of Cr(VI) under visible light irradiation (λ > 420 nm). The highest apparent rate constant is up to 0.05614 min−1, which is about 56 and 7.5 times that of pristine Bi4O5I2 and Bi2S3, respectively. Further detailed characterization reveals that the drastically enhanced and stable Cr(VI) reduction can be attributed to the efficient transfer and spatial separation of the photo-induced carriers, resulting in strong light harvesting. It results from not only the synergetic effects of Bi2S3 sensitization and heterojunctions with matched band structures, but also the unique flower/nanorod architecture and intimate contact at the molecular scale between Bi4O5I2 and Bi2S3. It also provides critical insights into the underlying pathways involved in the photocatalytic reduction of Cr(VI) over Bi-based heterojunctions.
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
RARE METALS
·
2021
·Vol. 41
·期 3
·931-941
·
IF 4.003
Guo Jun,Wang Zi-Yuan,Zhu Yu-Ke,Chen Lin,Feng Jing,Ge Zhen-Hua
Bi 2 S 3 is composed of inexpensive and environmental friendliness elements, which has received extensive interests and been investigated as a promising mid-temperature thermoelectric material for years. Even pure Bi 2 S 3 possesses a high Seebeck coefficient and low thermal conductivity, its low electrical conductivity leads to a low figure of merit (ZT) value. In this work, Bi 2 S 3 fabricated by solid-state melting combined with spark plasma sintering can significantly enhance the thermoelectric performance via introducing small amounts of Cu and BiCl 3 . Cu interstitial doping and Cl substitution on S site result in a large increase in electrical conductivity. Additionally, the enhanced phonon scattering is derived from the point defects caused by element doping, the grain boundaries, and the small amount of secondary phase, which leads to the low thermal conductivity. Finally, a high ZT value of 0.7 is obtained at 773 K and reaches a large average ZT of 0.36 in the temperature range from room temperature (RT) to 773 K for the Cu-interstitial-doped and BiCl 3 -alloyed (Cu 0.01 Bi 2 S 3 + 0.175 mol% BiCl 3 ) sample. Furthermore, the mechanical properties of the Cu 0.01 Bi 2 S 3 + 0.175 mol% BiCl 3 sample are lower than those of other Bi 2 S 3 samples, which stem from the weak chemical bonding strength. Graphic abstract
研究领域:
材料科学
·
能源材料
·
热电材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Ruizhen Liu,Huaiyuan Jiang,Ping Li,Jianfei Yin,Zhengrui Xu,Xiaoyu Chen,Jian Cheng,Shuangxi Gu,Renliang Lyu
Antibiotic pollution has posed environmental risks, and the crucial point lies in the elimination efficiency of antibiotics from wastewater. Herein, a ternary-structured B-TiO 2 /Bi 2 S 3 /PCs (photonic crystals) film, in which B-TiO 2 was a blend of anatase and rutile crystalline phases, was fabricated to evaluate the efficiency of antibiotic photodegradation under visible light irradiation. The synthesized B-TiO 2 (80 %)/Bi 2 S 3 /PCs(458) film exhibited superior photocatalytic efficiency of tetracycline hydrochloride (TC), with a degradation rate 7.56 times greater than that of pristine B-TiO 2 . These findings are closely related to the excellent photoelectron separation of the heterojunction between B-TiO 2 and Bi 2 S 3 , as well as the bandgap reflection effect and light localization effect of the PCs . Notably, the B-TiO 2 (80 %)/Bi 2 S 3 /PCs(458) film also displayed favourable degradation performance for ofloxacin (OFLX) and ciprofloxacin (CIP), with degradation rates of 83.98 % and 72.79 %, respectively. Active species trapping experiments and electron spin resonance (ESR) measurements revealed superoxide radicals (•O 2 − ) and photogenerated holes (h + ) as the main active species. Furthermore, potential photodegradation pathways were proposed by analyzing the degradation intermediates of TC and OFLX via liquid chromatography-mass spectrometry (LC–MS). In a word, the B-TiO 2 (80 %)/Bi 2 S 3 /PCs(458) film exhibited high efficiency in the treatment of antibiotic pollutants, thereby offering promising prospects for practical application.
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
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 45
·22580-22589
·
IF 9.931
Xiu-Qing Qiao,Zhen-Wei Zhang,Qiu-Hao Li,Dongfang Hou,Qichun Zhang,Jian Zhang,Dong-Sheng Li,Pingyun Feng,Xianhui Bu
Exploiting novel photocatalysts with high efficiency and durability for reduction of hexavalent chromium (Cr(VI)) has gained attention from fundamental science and industrial research. In this work, we synthesized novel two-dimensional (2D) n–n Bi2MoO6 & Bi2S3 heterojunctions by a facile in situ anion exchange process for remarkably efficient removal of Cr(VI). Results show that Bi2MoO6 & Bi2S3 heterojunctions with core–shell structures are formed through the intimate contact of Bi2MoO6 core and Bi2S3 shell. The prepared Bi2MoO6 & Bi2S3 heterojunctions exhibit unprecedented photocatalytic activity for reduction of Cr(VI) under visible light irradiation. The optimized BMO-S1 heterojunction displays the highest reduction efficiency (κapp = 0.164 min−1) for Cr(VI) reduction. To the best of our knowledge, it is one of the highest reduction rate achieved among reported photocatalysts for Cr(VI) reduction under visible-light irradiation. Detailed studies show that strong selective adsorption for Cr(VI) enhances this unprecedented photocatalytic activity. Moreover, the intimate heterojunction between Bi2MoO6 core and Bi2S3 shell can efficiently deteriorate the charge carrier recombination and Bi2S3 content can boost visible light harvesting, thereby contributing to the remarkable photocatalytic catalytic activity, which were proven by PL, EIS and transient photocurrent responses. Characterization of Mott–Schottky plots and DRS prove that the Bi2MoO6 & Bi2S3 heterojunctions established a type-II band alignment with intimate contact, accounting for the efficient transfer and separation of photogenerated carriers. This work provides a simple route for facial synthesis of heterojunction photocatalysts for Cr(VI) reduction in industrial applications.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Dong Yangtao,Murugesan Balaji,Lin Weidi,Wang Chao,Dai Junjie,Li Wenwen,Ma Quangui,Yang Xiaogang,Cai Yurong
In this study, a rod-like heterogeneous Bi 2 S 3 /Sb 2 S 3 was systematically engineered through a simple one-step hydrothermal method and subsequently used as an anode active material for sodium-ion batteries (SIBs). The Bi 2 S 3 /Sb 2 S 3 heterostructure electrode exhibits a high initial discharge capacity of 972.2 mAh g −1 and maintains a reversible capacity of 369.4 mAh g −1 after 500 cycles at a current density of 1 A g −1 . The outstanding electrochemical performance of the Bi 2 S 3 /Sb 2 S 3 electrode can be attributed to the synergistic contributions of the high capacity of Sb 2 S 3 and the excellent stability of Bi 2 S 3 . Simultaneously, the abundant heterogeneous phase boundaries formed by Bi 2 S 3 and Sb 2 S 3 provide stable reaction interfaces, better structural integrity, and enhanced Na + reaction kinetics. This work presents an opportunity to develop heterogeneous Bi 2 S 3 /Sb 2 S 3 anode materials with excellent properties, holding promise for potential applications in SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Yiqiu Shi,Xuyang Xiong,Shuoping Ding,Xiufan Liu,Qingqing Jiang,Juncheng Hu
We herein demonstrate the uniform porous hierarchical plate-like BiOCl/2D networks Bi 2 S 3 heterostructures realized by a facile two-step hydrothermal technique. The synthesis involved an anion exchange process by reacting pre-synthesized BiOCl irregular octagonal nanoplates with Na 2 S 2 O 3 ·5H 2 O in an aqueous solution. The experiment results revealed that the 3D plate-like heterostructures were composed of internal BiOCl and outside networks interwoven by 1D Bi 2 S 3 nanorods . Interestingly, the heterostructures had almost the same thickness and the bigger length compared to the precursor BiOCl. We proposed the possible formation mechanism of the composites which involved selective ion-exchange reaction, the following Ostwald ripening process and epitaxial growth . And the crystal lattice matching between the a- or b-axis of tetragonal BiOCl (a = b = 3.89 Å) and the a-axis of orthorhombic Bi 2 S 3 (a = 3.981 Å) could be responsible for the in-situ topotactic transformation. Due to the formation of hetero-nanostructures, the unique spatial architecture features and the existence of oxygen vacancies, the BiOCl/Bi 2 S 3 composites exhibited significantly extended photo-responsive range and improved photocatalytic activity for reduction of Cr VI under visible-light irradiation. Moreover, the possible mechanism of photocatalysis process was investigated. Our work is expected to inspire further attempts for hierarchical and unconventional hetero-nanostructures with unique spatial architecture, which is very promising for photocatalysis and other applications.
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
ACS Materials Letters
·
2023
·
IF 11.4
Zhenyu Hu,Dan Zhao,Yuheng Li,Xin Lv,Jinhui Song,Lingyi Meng,Shui-yang Lien,Peng Gao
The demand for a sustainable power supply and management has become increasingly essential with the rise of Internet of Things (IoT) devices and the associated wireless sensor networks. Inorganic thermoelectric thin films, such as those based on Bi2S3, are becoming a viable solution to this issue as they are low-toxic, inexpensive, and possess a high Seebeck coefficient and low thermal conductivity. However, they usually suffer from an inherent low electrical conductivity. In this study, we tackled this problem by incorporating Cl into Bi2S3 lattices using a solution process, resulting in a substantial increase in both the conductivity and carrier concentration. Additionally, DFT calculations show that the doping of Cl leads to the formation of a degenerate semiconductor, which increases conductivity. Moreover, a high power factor of 121.88 μW m–1 K–2 was achieved after doping before plasma treatment. Specifically, the Bi2S3 sample doped with 0.5 mmol of BiCl3 with plasma treatment achieved a remarkable conductivity of 100.72 S cm–1, among the highest reported for a Bi2S3-based system, which is attributed to the sharp increase of carrier concentration. This research demonstrates a promising approach for overcoming the inherently low conductivity of Bi2S3-based thermoelectric thin films to enable them as a viable solution for low-cost power supply in IoT applications.
研究领域:
材料科学
·
能源技术
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Jun Feng,Tao Jiang,Yingchun Han,Otieno Kevin Okoth,Ling Cheng,Jingdong Zhang
A dual Z-scheme Bi 2 S 3 /Bi 2 O 3 /WO 3 ternary film was constructed via a controllable reduction of peroxotungstate by ethanol, calcination of Bi (NO 3 ) 3 and in situ anion exchange of Bi 2 O 3 with sulfide. The as-prepared composite film was characterized by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The UV–visible diffuse reflectance spectroscopic and photoluminescence studies indicated that the introduction of Bi 2 S 3 in Bi 2 O 3 /WO 3 film effectively improved the absorption of the film in the visible region and suppressed the recombination of photogenerated carriers. The photoelectrocatalytic activity of the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was evaluated by decoloration of Rhodamine B under visible light illumination. Compared with WO 3 and Bi 2 O 3 /WO 3 films, the Bi 2 S 3 /Bi 2 O 3 /WO 3 film exhibited much higher degradation efficiency. Moreover, the enhanced visible light photoelectrocatalytic activity of the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was also demonstrated by efficient degradation of diclofenac. According to the reactive oxygen species detected by electron spin resonance, a dual Z-scheme system formed in the Bi 2 S 3 /Bi 2 O 3 /WO 3 film was proposed, which offered a new approach to the construction of semiconducting composite film with high photoelectrocatalytic performance for pollutant removal.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）