Photoelectrochemistry of photosynthetic reaction centers embedded in Al2O3 gel

Zhao, Jun; Ma, Ning; Liu, Baohong; Zhou, Yonglong; Xu, Chunhe; Kong, Jilie

doi:10.1016/s1010-6030(02)00188-0

Cited by 15 publications

(15 citation statements)

References 33 publications

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“…For RC, the applied bias deeply influences the sequence of photo-induced electron transfer between the electron donors and acceptors inside the protein [15] and thus the photoelectric responses of the RC/TiO 2 film. The maximal I sc observed was obtained at -0.3 V, which is similar to the result for the RC/Al 2 O 3 sol-gel film and RC multi-SAMs reported previously [5,6]. …”

Section: Resultssupporting

confidence: 89%

“…The I sc observed for RC/TiO 2 film was 8 μ A cm -2 , which is about two times larger than that for RC-free TiO 2 film (4 μ A cm -2 ). The open-circuit photovoltage measured ( V oc ∼ 30 mV) is nearly 10 times larger than the RC/Al 2 O 3 sol-gel film reported previously [6] in the same light intensity. Apparently, the combination of RC with nanocrystalline TiO 2 fully enhances the integral light-to-electric conversion efficiency of the photoelectrode.…”

Section: Resultscontrasting

confidence: 52%

“…100%) of the photo-induced charge separation in the red to NIR region [3, 4], it has been of great interests to construct a photoelectrode through modification of RC onto a specific matrix. In our previous work, multilayered self-assembly [5] and low-temperature Al 2 O 3 sol-gel [6] techniques have been employed to fabricate well-defined RC photoelectrodes with obvious photoelectric responses observed in the NIR region. With the aim at further enhancing the photoelectric responses of RC-based photoelectrodes, it is conceivable to make RC serve as a dye to photosensitize the semiconductors that have feeble light absorption at relative long wavelength region for their wide band gaps.…”

Section: Introductionmentioning

confidence: 99%

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Bio-nanocomposite Photoelectrode Composed of the BacteriaPhotosynthetic Reaction Center Entrapped on a NanocrystallineTiO2 Matrix

Liu

et al. 2005

Sensors

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Abstract:A new kind of bio-nanocomposite photoelectrode was fabricated through direct immobilization of the bacterial photosynthetic reaction center (RC) proteins on a nanocrystalline TiO 2 matrix prepared by anodic electrodeposition. The near-infrared (NIR)-visible absorption and fluorescence emission spectra displayed that structure and activity of the RC remained unaltered on the nano-TiO 2 film surface. High efficient light-harvesting of the NIR light energy by RC contributed to the distinct enhancement of the photoelectric conversion on such nanoporous matrix, which would provide a new strategy to develop versatile biomimic energy convertors or photoelectric sensors.

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Section: Resultssupporting

confidence: 89%

Section: Resultscontrasting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

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Bio-nanocomposite Photoelectrode Composed of the BacteriaPhotosynthetic Reaction Center Entrapped on a NanocrystallineTiO2 Matrix

Liu

et al. 2005

Sensors

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“…The RCs were immobilized on a glassy carbon electrode by using a positively charged hydrophilic Al 2 O 3 sol-gel matrix that electrostatically binds the negatively charged RCs. 86 At optimum experimental conditions (neutral pH, H 2 O:Al=200:1), high photocurrents of the 25 order of a few micro amperes were obtained. 86…”

Section: Rcs Embedded In Sol Gelmentioning

confidence: 94%

Progress and perspectives in exploiting photosynthetic biomolecules for solar energy harnessing

Ravi

Tan

2015

Energy Environ. Sci.

104

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5Photosynthetic proteins are emerging as a new class of photovoltaic materials as their nature-designed architecture and internal circuitry are so sophisticated that they carry out the initial light-driven steps of photosynthesis with ≈ 100% quantum efficiency. Research on bioinspired solar cells has increased in recent years as they promise better efficiency than the conventional p-n junction solar cells that have limited conversion efficiency (34%). Since it is a mammoth task to perfectly mimic the intricate proteins 10 evolved in nature, the idea of interfacing the natural proteins with engineered materials seems propitious for developing biohybrid solar cells. Herein, we summarize various approaches in immobilizing the photosynthetic biomolecules in photovoltaic devices and the progress in the photocurrent generation achieved. This review highlights the multidisciplinary nature of photosynthetic biohybrid devices and their future prospects in light of some of the research challenges and discrepancies witnessed by this field. 15 The fascinating aspect of this research area is that it guides the biologists to explore the possibilities of improving protein stability and robustness suitable for solar cells and inspires the solar cell researchers to explore the physics behind the working mechanisms of biohybrid solar cells which can generate novel architectures in future solar energy conversion devices. 60 superior system and mechanism for light harvesting and energy conversion. Their quantum efficiencies 17 are higher than that of the manmade solar cells. [18][19][20] Photosynthesis is an exemplary model for solar cell research as it is the prime mover powering the biological world, the mechanism behind the energy storage in 65 fossil fuels and the sustainer of earth's oxygenated atmosphere. 21 The architecture and the internal circuitry of the photosynthetic systems are very sophisticated that the initial light driven steps have ≈ 100% quantum efficiency. 18,22,23 Bioinspiration of photosynthesis in solar cells has instigated novel research 70 perspectives which are, in close pace, moving towards devising a high efficiency solar cell. Artificial Photosynthesis is one novel approach that tries to emulate the natural photosynthetic systems REVIEW This journal is © The Royal Society of Chemistry [year] [journal], [year], [vol], 00-00 | 9Fig. 7 (a) Two possible ways of RC binding and ET pathways between RC and electrode. P-primary electron donor (special pair), B-monomeric bacteriochlorophyll, H-bacteriopheophytin, Qa and Qb-primary and secondary electron acceptors (quinones). [Adapted from ref. 81 and ref.34, with permission from Elsevier Ltd] (b) Photoinduced-and dark-electron transfers in RC-Cyt-SAM-Gold electrode [Adapted with permission from ref.82,

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“…An exogenous electron acceptor can be used to mediate the transfer of electrons from the electron transport chain to the electrode because redox species in the photosynthetic organism do not react significantly at the working electrode. Addition of an exogenous electron acceptor greatly increases the magnitude of photocurrent [1][2][3]6,8,10]. Such a system can be employed for the detection of herbicides because they can disrupt photoinduced electron transfer [8,11,12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the photoinduced electron transfer reaction from the photosynthetic system in Rhodobacter sphaeroides to an exogenous electron acceptor

Kasuno

Takasu

Tsukatani

et al. 2009

Journal of Electroanalytical Chemistry

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Photoelectrochemistry of photosynthetic reaction centers embedded in Al2O3 gel

Cited by 15 publications

References 33 publications

Bio-nanocomposite Photoelectrode Composed of the BacteriaPhotosynthetic Reaction Center Entrapped on a NanocrystallineTiO2 Matrix

Bio-nanocomposite Photoelectrode Composed of the BacteriaPhotosynthetic Reaction Center Entrapped on a NanocrystallineTiO2 Matrix

Progress and perspectives in exploiting photosynthetic biomolecules for solar energy harnessing

Characterization of the photoinduced electron transfer reaction from the photosynthetic system in Rhodobacter sphaeroides to an exogenous electron acceptor

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